232 files changed, 11651 insertions, 5012 deletions

diff --git a/.travis.yml b/.travis.yml
index 5260cfd17..4e8377748 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -6,6 +6,15 @@ compiler:
 before_install:
   - if [ "$TRAVIS_MCSERVER_BUILD_TYPE" == "COVERAGE" ]; then sudo pip install cpp_coveralls; fi
 
+  # g++4.8
+  - sudo add-apt-repository -y ppa:ubuntu-toolchain-r/test
+  - sudo apt-get update -qq
+
+install:
+  # g++4.8
+  - sudo apt-get install -qq g++-4.8
+  - export CXX="g++-4.8"
+
 # Build MCServer
 script: ./CIbuild.sh
 
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 66281fe0c..d4e9d41e8 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -37,6 +37,21 @@ if(DEFINED ENV{MCSERVER_BUILD_ID})
 	endif()
 endif()
 
+# We need C++11 features, Visual Studio has those from VS2012, but it needs a new platform toolset for those; VS2013 supports them natively:
+# Adapted from http://binglongx.wordpress.com/2013/06/28/set-non-default-platform-toolset-in-cmake/
+if(MSVC OR MSVC_IDE)
+  if( MSVC_VERSION LESS 1700 )       # VC10- / VS2010-
+    message(FATAL_ERROR "The project requires C++11 features. "
+      "You need at least Visual Studio 11 (Microsoft Visual Studio 2012), "
+      "with Microsoft Visual C++ Compiler Nov 2012 CTP (v120_CTP_Nov2012).")
+  elseif( MSVC_VERSION EQUAL 1700 )  # VC11 / VS2012
+    message( "VC11: using Microsoft Visual Studio 2012 "
+      "with Microsoft Visual C++ Compiler Nov 2012 CTP (v120_CTP_Nov2012)" )
+    set(CMAKE_GENERATOR_TOOLSET "v120_CTP_Nov2012" CACHE STRING "Platform Toolset" FORCE)
+  else() # VC12+, assuming C++11 supported.
+  endif()
+endif()
+
 # This has to be done before any flags have been set up.
 if(${BUILD_TOOLS})
 	add_subdirectory(Tools/MCADefrag/)
diff --git a/CONTRIBUTORS b/CONTRIBUTORS
index 8620a1475..9a0a675e7 100644
--- a/CONTRIBUTORS
+++ b/CONTRIBUTORS
@@ -10,6 +10,7 @@ Howaner
 keyboard
 Lapayo
 Luksor
+M10360
 marmot21
 Masy98
 mborland
@@ -17,6 +18,7 @@ mgueydan
 MikeHunsinger
 mtilden
 nesco
+p-mcgowan
 rs2k
 SamJBarney
 Sofapriester
diff --git a/MCServer/Plugins/APIDump/APIDesc.lua b/MCServer/Plugins/APIDump/APIDesc.lua
index 6a151b5ef..72dcce5e4 100644
--- a/MCServer/Plugins/APIDump/APIDesc.lua
+++ b/MCServer/Plugins/APIDump/APIDesc.lua
@@ -534,6 +534,7 @@ end
 				GetUUID = { Params = "", Return = "string", Notes = "Returns the authentication-based UUID of the client. This UUID should be used to identify the player when persisting any player-related data. Returns a 32-char UUID (no dashes)" },
 				GetUsername = { Params = "", Return = "string", Notes = "Returns the username that the client has provided" },
 				GetViewDistance = { Params = "", Return = "number", Notes = "Returns the viewdistance (number of chunks loaded for the player in each direction)" },
+				GetRequestedViewDistance = { Params = "", Return = "number", Notes = "Returns the view distance that the player request, not the used view distance." },
 				HasPluginChannel = { Params = "ChannelName", Return = "bool", Notes = "Returns true if the client has registered to receive messages on the specified plugin channel." },
 				IsUUIDOnline = { Params = "UUID", Return = "bool", Notes = "(STATIC) Returns true if the UUID is generated by online auth, false if it is an offline-generated UUID. We use Version-3 UUIDs for offline UUIDs, online UUIDs are Version-4, thus we can tell them apart. Accepts both 32-char and 36-char UUIDs (with and without dashes). If the string given is not a valid UUID, returns false."},
 				Kick = { Params = "Reason", Return = "", Notes = "Kicks the user with the specified reason" },
@@ -614,7 +615,7 @@ function OnPlayerJoined(a_Player)
 	-- Send an example composite chat message to the player:
 	a_Player:SendMessage(cCompositeChat()
 		:AddTextPart("Hello, ")
-		:AddUrlPart(a_Player:GetName(), "www.mc-server.org", "u@2")  -- Colored underlined link
+		:AddUrlPart(a_Player:GetName(), "http://www.mc-server.org", "u@2")  -- Colored underlined link
 		:AddSuggestCommandPart(", and welcome.", "/help", "u")       -- Underlined suggest-command
 		:AddRunCommandPart(" SetDay", "/time set 0")                 -- Regular text that will execute command when clicked
 		:SetMessageType(mtJoin)                                      -- It is a join-message
@@ -1667,13 +1668,14 @@ a_Player:OpenWindow(Window);
 				SetCustomName = { Params = "string", Return = "", Notes = "Sets the custom name of the monster. You see the name over the monster. If you want to disable the custom name, simply set an empty string." },
 				IsCustomNameAlwaysVisible = { Params = "", Return = "bool", Notes = "Is the custom name of this monster always visible? If not, you only see the name when you sight the mob." },
 				SetCustomNameAlwaysVisible = { Params = "bool", Return = "", Notes = "Sets the custom name visiblity of this monster. If it's false, you only see the name when you sight the mob. If it's true, you always see the custom name." },
-				FamilyFromType = { Params = "{{cMonster#MobType|MobType}}", Return = "{{cMonster#MobFamily|MobFamily}}", Notes = "(STATIC) Returns the mob family ({{cMonster#MobFamily|mfXXX}} constants) based on the mob type ({{cMonster#MobType|mtXXX}} constants)" },
+				FamilyFromType = { Params = "{{Globals#MobType|MobType}}", Return = "{{cMonster#MobFamily|MobFamily}}", Notes = "(STATIC) Returns the mob family ({{cMonster#MobFamily|mfXXX}} constants) based on the mob type ({{Globals#MobType|mtXXX}} constants)" },
 				GetMobFamily = { Params = "", Return = "{{cMonster#MobFamily|MobFamily}}", Notes = "Returns this mob's family ({{cMonster#MobFamily|mfXXX}} constant)" },
-				GetMobType = { Params = "", Return = "{{cMonster#MobType|MobType}}", Notes = "Returns the type of this mob ({{cMonster#MobType|mtXXX}} constant)" },
+				GetMobType = { Params = "", Return = "{{Globals#MobType|MobType}}", Notes = "Returns the type of this mob ({{Globals#MobType|mtXXX}} constant)" },
 				GetSpawnDelay = { Params = "{{cMonster#MobFamily|MobFamily}}", Return = "number", Notes = "(STATIC) Returns the spawn delay  - the number of game ticks between spawn attempts - for the specified mob family." },
-				MobTypeToString = { Params = "{{cMonster#MobType|MobType}}", Return = "string", Notes = "(STATIC) Returns the string representing the given mob type ({{cMonster#MobType|mtXXX}} constant), or empty string if unknown type." },
+				MobTypeToString = { Params = "{{Globals#MobType|MobType}}", Return = "string", Notes = "(STATIC) Returns the string representing the given mob type ({{Globals#MobType|mtXXX}} constant), or empty string if unknown type." },
+				MobTypeToVanillaName = { Params = "{{Globals#MobType|MobType}}", Return = "string", Notes = "(STATIC) Returns the vanilla name of the given mob type, or empty string if unknown type." },
 				MoveToPosition = { Params = "Position", Return = "", Notes = "Moves mob to the specified position" },
-				StringToMobType = { Params = "string", Return = "{{cMonster#MobType|MobType}}", Notes = "(STATIC) Returns the mob type ({{cMonster#MobType|mtXXX}} constant) parsed from the string type (\"creeper\"), or mtInvalidType if unrecognized." },
+				StringToMobType = { Params = "string", Return = "{{Globals#MobType|MobType}}", Notes = "(STATIC) Returns the mob type ({{Globals#MobType|mtXXX}} constant) parsed from the string type (\"creeper\"), or mtInvalidType if unrecognized." },
 				GetRelativeWalkSpeed = { Params = "", Return = "number", Notes = "Returns the relative walk speed of this mob. Standard is 1.0" },
 				SetRelativeWalkSpeed = { Params = "number", Return = "", Notes = "Sets the relative walk speed of this mob. Standard is 1.0" },
 			},
@@ -1724,13 +1726,6 @@ a_Player:OpenWindow(Window);
 						Mobs are divided into families. The following constants are used for individual family types:
 					]],
 				},
-				MobType =
-				{
-					Include = "mt.*",
-					TextBefore = [[
-						The following constants are used for distinguishing between the individual mob types:
-					]],
-				},
 			},
 			Inherits = "cPawn",
 		},  -- cMonster
@@ -2137,6 +2132,7 @@ cPluginManager.AddHook(cPluginManager.HOOK_CHAT, OnChatMessage);
 				BroadcastChatWarning = { Params = "MessageText", Return = "", Notes = "Broadcasts the specified message to all players, with its message type set to mtWarning. Use for concerning events, such as plugin reload etc." },
 				CreateAndInitializeWorld = { Params = "WorldName", Return = "{{cWorld|cWorld}}", Notes = "Creates a new world and initializes it. If there is a world whith the same name it returns nil.<br/><br/><b>NOTE</b>This function is currently unsafe, do not use!" },
 				FindAndDoWithPlayer = { Params = "PlayerName, CallbackFunction", Return = "", Notes = "Calls the given callback function for all players with names partially (or fully) matching the name string provided." },
+				DoWithPlayerByUUID = { Params = "PlayerUUID, CallbackFunction, [CallbackData]", Return = "bool", Notes = "If there is the player with the uuid, calls the CallbackFunction with the {{cPlayer}} parameter representing the player. The CallbackFunction has the following signature: <pre class=\"prettyprint lang-lua\">function Callback({{cPlayer|Player}}, [CallbackData])</pre> The function returns false if the player was not found, or whatever bool value the callback returned if the player was found." },
 				ForEachPlayer = { Params = "CallbackFunction", Return = "", Notes = "Calls the given callback function for each player. The callback function has the following signature: <pre class=\"prettyprint lang-lua\">function Callback({{cPlayer|cPlayer}})</pre>" },
 				ForEachWorld = { Params = "CallbackFunction", Return = "", Notes = "Calls the given callback function for each world. The callback function has the following signature: <pre class=\"prettyprint lang-lua\">function Callback({{cWorld|cWorld}})</pre>" },
 				Get = { Params = "", Return = "Root object", Notes = "(STATIC)This function returns the cRoot object." },
@@ -2406,6 +2402,7 @@ end
 					{ Params = "{{Vector3i|BlockCoords}}, BlockType, BlockMeta", Return = "", Notes = "Sets the block at the specified coords, without waking up the simulators or replacing the block entities for the previous block type. Do not use if the block being replaced has a block entity tied to it!" },
 				},
 				FindAndDoWithPlayer = { Params = "PlayerNameHint, CallbackFunction, [CallbackData]", Return = "bool", Notes = "If there is a player of a name similar to the specified name (weighted-match), calls the CallbackFunction with the {{cPlayer}} parameter representing the player. The CallbackFunction has the following signature: <pre class=\"prettyprint lang-lua\">function Callback({{cPlayer|Player}}, [CallbackData])</pre> The function returns false if the player was not found, or whatever bool value the callback returned if the player was found. Note that the name matching is very loose, so it is a good idea to check the player name in the callback function." },
+				DoWithPlayerByUUID = { Params = "PlayerUUID, CallbackFunction, [CallbackData]", Return = "bool", Notes = "If there is the player with the uuid, calls the CallbackFunction with the {{cPlayer}} parameter representing the player. The CallbackFunction has the following signature: <pre class=\"prettyprint lang-lua\">function Callback({{cPlayer|Player}}, [CallbackData])</pre> The function returns false if the player was not found, or whatever bool value the callback returned if the player was found." },
 				ForEachBlockEntityInChunk = { Params = "ChunkX, ChunkZ, CallbackFunction, [CallbackData]", Return = "bool", Notes = "Calls the specified callback for each block entity in the chunk. Returns true if all block entities in the chunk have been processed (including when there are zero block entities), or false if the callback has aborted the enumeration by returning true. The CallbackFunction has the following signature: <pre class=\"prettyprint lang-lua\">function Callback({{cBlockEntity|BlockEntity}}, [CallbackData])</pre> The callback should return false or no value to continue with the next block entity, or true to abort the enumeration. Use {{tolua}}.cast() to cast the Callback's BlockEntity parameter to the correct {{cBlockEntity}} descendant." },
 				ForEachChestInChunk = { Params = "ChunkX, ChunkZ, CallbackFunction, [CallbackData]", Return = "bool", Notes = "Calls the specified callback for each chest in the chunk. Returns true if all chests in the chunk have been processed (including when there are zero chests), or false if the callback has aborted the enumeration by returning true. The CallbackFunction has the following signature: <pre class=\"prettyprint lang-lua\">function Callback({{cChestEntity|ChestEntity}}, [CallbackData])</pre> The callback should return false or no value to continue with the next chest, or true to abort the enumeration." },
 				ForEachEntity = { Params = "CallbackFunction, [CallbackData]", Return = "bool", Notes = "Calls the specified callback for each entity in the loaded world. Returns true if all the entities have been processed (including when there are zero entities), or false if the callback function has aborted the enumeration by returning true. The callback function has the following signature: <pre class=\"prettyprint lang-lua\">function Callback({{cEntity|Entity}}, [CallbackData])</pre> The callback should return false or no value to continue with the next entity, or true to abort the enumeration." },
@@ -2497,7 +2494,7 @@ end
 				SetCommandBlocksEnabled = { Params = "IsEnabled (bool)", Return = "", Notes = "Sets whether command blocks should be enabled on the (entire) server." },
 				SetShouldUseChatPrefixes = { Params = "", Return = "ShouldUse (bool)", Notes = "Sets whether coloured chat prefixes such as [INFO] is used with the SendMessageXXX() or BroadcastChatXXX(), or simply the entire message is coloured in the respective colour." },
 				ShouldUseChatPrefixes = { Params = "", Return = "bool", Notes = "Returns whether coloured chat prefixes are prepended to chat messages or the entire message is simply coloured." },
-				SetSignLines = { Params = "X, Y, Z, Line1, Line2, Line3, Line4, [{{cPlayer|Player}}]", Return = "", Notes = "Sets the sign text at the specified coords. The sign-updating hooks are called for the change. The Player parameter is used to indicate the player from whom the change has come, it may be nil. Same as UpdateSign()." },
+				SetSignLines = { Params = "X, Y, Z, Line1, Line2, Line3, Line4, [{{cPlayer|Player}}]", Return = "", Notes = "Sets the sign text at the specified coords. The sign-updating hooks are called for the change. The Player parameter is used to indicate the player from whom the change has come, it may be nil." },
 				SetTicksUntilWeatherChange = { Params = "NumTicks", Return = "", Notes = "Sets the number of ticks after which the weather will be changed." },
 				SetTimeOfDay = { Params = "TimeOfDayTicks", Return = "", Notes = "Sets the time of day, expressed as number of ticks past sunrise, in the range 0 .. 24000." },
 				SetWeather = { Params = "Weather", Return = "", Notes = "Sets the current weather (wSunny, wRain, wStorm) and resets the TicksUntilWeatherChange to the default value for the new weather. The normal weather-changing hooks are called for the change." },
@@ -2512,7 +2509,7 @@ end
 				SpawnExperienceOrb = { Params = "X, Y, Z, Reward", Return = "EntityID", Notes = "Spawns an {{cExpOrb|experience orb}} at the specified coords, with the given reward" },
 				SpawnPrimedTNT = { Params = "X, Y, Z, FuseTicks, InitialVelocityCoeff", Return = "", Notes = "Spawns a {{cTNTEntity|primed TNT entity}} at the specified coords, with the given fuse ticks. The entity gets a random speed multiplied by the InitialVelocityCoeff, 1 being the default value." },
 				TryGetHeight = { Params = "BlockX, BlockZ", Return = "IsValid, Height", Notes = "Returns true and height of the highest non-air block if the chunk is loaded, or false otherwise." },
-				UpdateSign = { Params = "X, Y, Z, Line1, Line2, Line3, Line4, [{{cPlayer|Player}}]", Return = "", Notes = "Sets the sign text at the specified coords. The sign-updating hooks are called for the change. The Player parameter is used to indicate the player from whom the change has come, it may be nil. Same as SetSignLiens()" },
+				UpdateSign = { Params = "X, Y, Z, Line1, Line2, Line3, Line4, [{{cPlayer|Player}}]", Return = "", Notes = "(<b>DEPRECATED</b>) Please use SetSignLines()." },
 				UseBlockEntity = { Params = "{{cPlayer|Player}}, BlockX, BlockY, BlockZ", Return = "", Notes = "Makes the specified Player use the block entity at the specified coords (open chest UI, etc.) If the cords are in an unloaded chunk or there's no block entity, ignores the call." },
 				WakeUpSimulators = { Params = "BlockX, BlockY, BlockZ", Return = "", Notes = "Wakes up the simulators for the specified block." },
 				WakeUpSimulatorsInArea = { Params = "MinBlockX, MaxBlockX, MinBlockY, MaxBlockY, MinBlockZ, MaxBlockZ", Return = "", Notes = "Wakes up the simulators for all the blocks in the specified area (edges inclusive)." },
@@ -2568,7 +2565,7 @@ World:ForEachEntity(
 			return;
 		end
 		local Monster = tolua.cast(a_Entity, "cMonster");  -- Get the cMonster out of cEntity, now that we know the entity represents one.
-		if (Monster:GetMobType() == cMonster.mtSpider) then
+		if (Monster:GetMobType() == mtSpider) then
 			Monster:TeleportToCoords(Monster:GetPosX(), Monster:GetPosY() + 100, Monster:GetPosZ());
 		end
 	end
@@ -2925,7 +2922,7 @@ end
 				StringToDamageType = {Params = "string", Return = "{{Globals#DamageType|DamageType}}", Notes = "Converts a string representation to a {{Globals#DamageType|DamageType}} enumerated value."},
 				StringToDimension = {Params = "string", Return = "{{Globals#WorldDimension|Dimension}}", Notes = "Converts a string representation to a {{Globals#WorldDimension|Dimension}} enumerated value"},
 				StringToItem = {Params = "string, {{cItem|cItem}}", Return = "bool", Notes = "Parses the given string and sets the item; returns true if successful"},
-				StringToMobType = {Params = "string", Return = "{{cMonster#MobType|MobType}}", Notes = "Converts a string representation to a {{cMonster#MobType|MobType}} enumerated value"},
+				StringToMobType = {Params = "string", Return = "{{Globals#MobType|MobType}}", Notes = "<b>DEPRECATED!</b> Please use cMonster:StringToMobType(). Converts a string representation to a {{Globals#MobType|MobType}} enumerated value"},
 				StripColorCodes = {Params = "string", Return = "string", Notes = "Removes all control codes used by MC for colors and styles"},
 				TrimString = {Params = "string", Return = "string", Notes = "Trims whitespace at both ends of the string"},
 				md5 = {Params = "string", Return = "string", Notes = "converts a string to an md5 hash"},
@@ -3011,6 +3008,13 @@ end
 						gmXXX constants, the eGameMode_ constants are deprecated and will be removed from the API.
 					]],
 				},
+				MobType =
+				{
+					Include = { "^mt.*" },
+					TextBefore = [[
+						The following constants are used for distinguishing between the individual mob types:
+					]],
+				},
 				Weather =
 				{
 					Include = { "^eWeather_.*", "wSunny", "wRain", "wStorm", "wThunderstorm" },
diff --git a/MCServer/Plugins/APIDump/Classes/BlockEntities.lua b/MCServer/Plugins/APIDump/Classes/BlockEntities.lua
index 90ebf12e6..daa658654 100644
--- a/MCServer/Plugins/APIDump/Classes/BlockEntities.lua
+++ b/MCServer/Plugins/APIDump/Classes/BlockEntities.lua
@@ -231,6 +231,43 @@ World:ForEachChestInChunk(Player:GetChunkX(), Player:GetChunkZ(),
 		},
 	},  -- cJukeboxEntity
 
+	cMobHeadEntity =
+	{
+		Desc = [[
+			This class represents a mob head block entity in the world.
+		]],
+		Inherits = "cBlockEntity",
+		Functions =
+		{
+			SetType = { Params = "eMobHeadType", Return = "", Notes = "Set the type of the mob head" },
+			SetRotation = { Params = "eMobHeadRotation", Return = "", Notes = "Sets the rotation of the mob head" },
+			SetOwner = { Params = "string", Return = "", Notes = "Set the player name for mob heads with player type" },
+			GetType = { Params = "", Return = "eMobHeadType", Notes = "Returns the type of the mob head" },
+			GetRotation = { Params = "", Return = "eMobHeadRotation", Notes = "Returns the rotation of the mob head" },
+			GetOwner = { Params = "", Return = "string", Notes = "Returns the player name of the mob head" },
+		},
+	},  -- cMobHeadEntity
+
+	cMobSpawnerEntity =
+	{
+		Desc = [[
+			This class represents a mob spawner block entity in the world.
+		]],
+		Inherits = "cBlockEntity",
+		Functions =
+		{
+			UpdateActiveState = { Params = "", Return = "", Notes = "Upate the active flag from the mob spawner. This function will called every 5 seconds from the Tick() function." },
+			ResetTimer = { Params = "", Return = "", Notes = "Sets the spawn delay to a new random value." },
+			SpawnEntity = { Params = "", Return = "", Notes = "Spawns the entity. This function automaticly change the spawn delay!" },
+			GetEntity = { Params = "", Return = "{{Globals#MobType|MobType}}", Notes = "Returns the entity type that will be spawn by this mob spawner." },
+			SetEntity = { Params = "{{Globals#MobType|MobType}}", Return = "", Notes = "Sets the entity type who will be spawn by this mob spawner." },
+			GetSpawnDelay = { Params = "", Return = "number", Notes = "Returns the spawn delay. This is the tick delay that is needed to spawn new monsters." },
+			SetSpawnDelay = { Params = "number", Return = "", Notes = "Sets the spawn delay." },
+			GetNearbyPlayersNum = { Params = "", Return = "number", Notes = "Returns the amount of the nearby players in a 16-block radius." },
+			GetNearbyMonsterNum = { Params = "", Return = "number", Notes = "Returns the amount of this monster type in a 8-block radius (Y: 4-block radius)." },
+		},
+	},  -- cMobSpawnerEntity
+
 	cNoteEntity =
 	{
 		Desc = [[
diff --git a/MCServer/Plugins/APIDump/Classes/Projectiles.lua b/MCServer/Plugins/APIDump/Classes/Projectiles.lua
index aef6a048c..748f58b71 100644
--- a/MCServer/Plugins/APIDump/Classes/Projectiles.lua
+++ b/MCServer/Plugins/APIDump/Classes/Projectiles.lua
@@ -123,35 +123,47 @@ return
 
 	cSplashPotionEntity =
 	{
-		Desc = "",
-		Functions = {},
+		Desc = [[
+			Represents a thrown splash potion.
+		]],
+			Functions =
+			{
+				GetEntityEffect = { Params = "", Return = "{{cEntityEffect}}", Notes = "Returns the entity effect in this potion" },
+				GetEntityEffectType = { Params = "", Return = "{{cEntityEffect|Entity effect type}}", Notes = "Returns the effect type of this potion" },
+				GetPotionColor = { Params = "", Return = "number", Notes = "Returns the color index of the particles emitted by this potion" },
+				SetEntityEffect = { Params = "{{cEntityEffect}}", Return = "", Notes = "Sets the entity effect for this potion" },
+				SetEntityEffectType = { Params = "{{cEntityEffect|Entity effect type}}", Return = "", Notes = "Sets the effect type of this potion" },
+				SetPotionColor = { Params = "number", Return = "", Notes = "Sets the color index of the particles for this potion" },
+			},
 		Inherits = "cProjectileEntity",
 	},  -- cSplashPotionEntity
 
 	cThrownEggEntity =
 	{
-		Desc = "",
+		Desc = [[
+			Represents a thrown egg.
+		]],
 		Functions = {},
 		Inherits = "cProjectileEntity",
 	},  -- cThrownEggEntity
 
 	cThrownEnderPearlEntity =
 	{
-		Desc = "",
+		Desc = "Represents a thrown ender pearl.",
 		Functions = {},
 		Inherits = "cProjectileEntity",
 	},  -- cThrownEnderPearlEntity
 	
 	cThrownSnowballEntity =
 	{
-		Desc = "",
+		Desc = "Represents a thrown snowball.",
 		Functions = {},
 		Inherits = "cProjectileEntity",
 	},  -- cThrownSnowballEntity
 
 	cWitherSkullEntity =
 	{
-		Desc = "",
+		Desc = "Represents a wither skull being shot.",
 		Functions = {},
 		Inherits = "cProjectileEntity",
 	},  -- cWitherSkullEntity
diff --git a/MCServer/Plugins/Core b/MCServer/Plugins/Core
-Subproject 4702471943511f641458c7e8e89b430a723f43e
+Subproject 39d980e3a3447ac23f61c7d65426b33ee6c0718
diff --git a/MCServer/Plugins/Debuggers/Debuggers.lua b/MCServer/Plugins/Debuggers/Debuggers.lua
index 3dcd4ebee..a047488b5 100644
--- a/MCServer/Plugins/Debuggers/Debuggers.lua
+++ b/MCServer/Plugins/Debuggers/Debuggers.lua
@@ -35,39 +35,15 @@ function Initialize(Plugin)
 	-- _X: Disabled so that the normal operation doesn't interfere with anything
 	-- PM:AddHook(cPluginManager.HOOK_CHUNK_GENERATED,              OnChunkGenerated);
 
-	PM:BindCommand("/nick",    "debuggers", HandleNickCmd,         "- Gives you a custom name");
-	PM:BindCommand("/le",      "debuggers", HandleListEntitiesCmd, "- Shows a list of all the loaded entities");
-	PM:BindCommand("/ke",      "debuggers", HandleKillEntitiesCmd, "- Kills all the loaded entities");
-	PM:BindCommand("/wool",    "debuggers", HandleWoolCmd,         "- Sets all your armor to blue wool");
-	PM:BindCommand("/testwnd", "debuggers", HandleTestWndCmd,      "- Opens up a window using plugin API");
-	PM:BindCommand("/gc",      "debuggers", HandleGCCmd,           "- Activates the Lua garbage collector");
-	PM:BindCommand("/fast",    "debuggers", HandleFastCmd,         "- Switches between fast and normal movement speed");
-	PM:BindCommand("/dash",    "debuggers", HandleDashCmd,         "- Switches between fast and normal sprinting speed");
-	PM:BindCommand("/hunger",  "debuggers", HandleHungerCmd,       "- Lists the current hunger-related variables");
-	PM:BindCommand("/poison",  "debuggers", HandlePoisonCmd,       "- Sets food-poisoning for 15 seconds");
-	PM:BindCommand("/starve",  "debuggers", HandleStarveCmd,       "- Sets the food level to zero");
-	PM:BindCommand("/fl",      "debuggers", HandleFoodLevelCmd,    "- Sets the food level to the given value");
-	PM:BindCommand("/spidey",  "debuggers", HandleSpideyCmd,       "- Shoots a line of web blocks until it hits non-air");
-	PM:BindCommand("/ench",    "debuggers", HandleEnchCmd,         "- Provides an instant dummy enchantment window");
-	PM:BindCommand("/fs",      "debuggers", HandleFoodStatsCmd,    "- Turns regular foodstats message on or off");
-	PM:BindCommand("/arr",     "debuggers", HandleArrowCmd,        "- Creates an arrow going away from the player");
-	PM:BindCommand("/fb",      "debuggers", HandleFireballCmd,     "- Creates a ghast fireball as if shot by the player");
-	PM:BindCommand("/xpa",     "debuggers", HandleAddExperience,   "- Adds 200 experience to the player");
-	PM:BindCommand("/xpr",     "debuggers", HandleRemoveXp,        "- Remove all xp");
-	PM:BindCommand("/fill",    "debuggers", HandleFill,            "- Fills all block entities in current chunk with junk");
-	PM:BindCommand("/fr",      "debuggers", HandleFurnaceRecipe,   "- Shows the furnace recipe for the currently held item");
-	PM:BindCommand("/ff",      "debuggers", HandleFurnaceFuel,     "- Shows how long the currently held item would burn in a furnace");
-	PM:BindCommand("/sched",   "debuggers", HandleSched,           "- Schedules a simple countdown using cWorld:ScheduleTask()");
-	PM:BindCommand("/cs",      "debuggers", HandleChunkStay,       "- Tests the ChunkStay Lua integration for the specified chunk coords");
-	PM:BindCommand("/compo",   "debuggers", HandleCompo,           "- Tests the cCompositeChat bindings");
-	PM:BindCommand("/sb",      "debuggers", HandleSetBiome,        "- Sets the biome around you to the specified one");
-	PM:BindCommand("/wesel",   "debuggers", HandleWESel,           "- Expands the current WE selection by 1 block in X/Z");
-	PM:BindCommand("/rmitem",  "debuggers", HandleRMItem,          "- Remove the specified item from the inventory.");
-	PM:BindCommand("/pickups", "debuggers", HandlePickups,         "- Spawns random pickups around you");
-	PM:BindCommand("/poof",    "debuggers", HandlePoof,            "- Nudges pickups close to you away from you");
-	
-	PM:BindConsoleCommand("sched", HandleConsoleSchedule, "Tests the world scheduling");
-
+	-- Load the InfoReg shared library:
+	dofile(cPluginManager:GetPluginsPath() .. "/InfoReg.lua")
+	
+	-- Bind all the commands:
+	RegisterPluginInfoCommands();
+	
+	-- Bind all the console commands:
+	RegisterPluginInfoConsoleCommands();
+	
 	Plugin:AddWebTab("Debuggers",  HandleRequest_Debuggers)
 	Plugin:AddWebTab("StressTest", HandleRequest_StressTest)
 
@@ -1643,3 +1619,85 @@ end
 
 
 
+
+function HandleConsoleLoadChunk(a_Split)
+	-- Check params:
+	local numParams = #a_Split
+	if (numParams ~= 3) and (numParams ~= 4) then
+		return true, "Usage: " .. a_Split[1] .. " <ChunkX> <ChunkZ> [<WorldName>]"
+	end
+	
+	-- Get the chunk coords:
+	local chunkX = tonumber(a_Split[2])
+	if (chunkX == nil) then
+		return true, "Not a number: '" .. a_Split[2] .. "'"
+	end
+	local chunkZ = tonumber(a_Split[3])
+	if (chunkZ == nil) then
+		return true, "Not a number: '" .. a_Split[3] .. "'"
+	end
+
+	-- Get the world:
+	local world
+	if (a_Split[4] == nil) then
+		world = cRoot:Get():GetDefaultWorld()
+	else
+		world = cRoot:Get():GetWorld(a_Split[4])
+		if (world == nil) then
+			return true, "There's no world named '" .. a_Split[4] .. "'."
+		end
+	end
+	
+	-- Queue a ChunkStay for the chunk, log a message when the chunk is loaded:
+	world:ChunkStay({{chunkX, chunkZ}}, nil,
+		function()
+			LOG("Chunk [" .. chunkX .. ", " .. chunkZ .. "] is loaded")
+		end
+	)
+	return true
+end
+
+
+
+
+
+function HandleConsolePrepareChunk(a_Split)
+	-- Check params:
+	local numParams = #a_Split
+	if (numParams ~= 3) and (numParams ~= 4) then
+		return true, "Usage: " .. a_Split[1] .. " <ChunkX> <ChunkZ> [<WorldName>]"
+	end
+	
+	-- Get the chunk coords:
+	local chunkX = tonumber(a_Split[2])
+	if (chunkX == nil) then
+		return true, "Not a number: '" .. a_Split[2] .. "'"
+	end
+	local chunkZ = tonumber(a_Split[3])
+	if (chunkZ == nil) then
+		return true, "Not a number: '" .. a_Split[3] .. "'"
+	end
+
+	-- Get the world:
+	local world
+	if (a_Split[4] == nil) then
+		world = cRoot:Get():GetDefaultWorld()
+	else
+		world = cRoot:Get():GetWorld(a_Split[4])
+		if (world == nil) then
+			return true, "There's no world named '" .. a_Split[4] .. "'."
+		end
+	end
+	
+	-- Queue the chunk for preparing, log a message when prepared:
+	world:PrepareChunk(chunkX, chunkZ,
+		function(a_CBChunkX, a_CBChunkZ)
+			LOG("Chunk [" .. chunkX .. ", " .. chunkZ .. "] has been prepared")
+		end
+	)
+	return true
+end
+
+
+
+
diff --git a/MCServer/Plugins/Debuggers/Info.lua b/MCServer/Plugins/Debuggers/Info.lua
new file mode 100644
index 000000000..b96ef3de5
--- /dev/null
+++ b/MCServer/Plugins/Debuggers/Info.lua
@@ -0,0 +1,223 @@
+
+-- Info.lua
+
+-- Implements the g_PluginInfo standard plugin description
+
+
+
+
+
+g_PluginInfo =
+{
+	Name = "Debuggers",
+	Version = "14",
+	Date = "2014-12-11",
+	Description = [[Contains code for testing and debugging the server. Should not be enabled on a production server!]],
+	
+	Commands =
+	{
+		["/arr"] =
+		{
+			Permission = "debuggers",
+			Handler = HandleArrowCmd,
+			HelpString = "Creates an arrow going away from the player"
+		},
+		["/compo"] =
+		{
+			Permission = "debuggers",
+			Handler = HandleCompo,
+			HelpString = "Tests the cCompositeChat bindings"
+		},
+		["/cs"] =
+		{
+			Permission = "debuggers",
+			Handler = HandleChunkStay,
+			HelpString = "Tests the ChunkStay Lua integration for the specified chunk coords"
+		},
+		["/dash"] =
+		{
+			Permission = "debuggers",
+			Handler = HandleDashCmd,
+			HelpString = "Switches between fast and normal sprinting speed"
+		},
+		["/ench"] =
+		{
+			Permission = "debuggers",
+			Handler = HandleEnchCmd,
+			HelpString = "Provides an instant dummy enchantment window"
+		},
+		["/fast"] =
+		{
+			Permission = "debuggers",
+			Handler = HandleFastCmd,
+			HelpString = "Switches between fast and normal movement speed"
+		},
+		["/fb"] =
+		{
+			Permission = "debuggers",
+			Handler = HandleFireballCmd,
+			HelpString = "Creates a ghast fireball as if shot by the player"
+		},
+		["/ff"] =
+		{
+			Permission = "debuggers",
+			Handler = HandleFurnaceFuel,
+			HelpString = "Shows how long the currently held item would burn in a furnace"
+		},
+		["/fill"] =
+		{
+			Permission = "debuggers",
+			Handler = HandleFill,
+			HelpString = "Fills all block entities in current chunk with junk"
+		},
+		["/fl"] =
+		{
+			Permission = "debuggers",
+			Handler = HandleFoodLevelCmd,
+			HelpString = "Sets the food level to the given value"
+		},
+		["/fr"] =
+		{
+			Permission = "debuggers",
+			Handler = HandleFurnaceRecipe,
+			HelpString = "Shows the furnace recipe for the currently held item"
+		},
+		["/fs"] =
+		{
+			Permission = "debuggers",
+			Handler = HandleFoodStatsCmd,
+			HelpString = "Turns regular foodstats message on or off"
+		},
+		["/gc"] =
+		{
+			Permission = "debuggers",
+			Handler = HandleGCCmd,
+			HelpString = "Activates the Lua garbage collector"
+		},
+		["/hunger"] =
+		{
+			Permission = "debuggers",
+			Handler = HandleHungerCmd,
+			HelpString = "Lists the current hunger-related variables"
+		},
+		["/ke"] =
+		{
+			Permission = "debuggers",
+			Handler = HandleKillEntitiesCmd,
+			HelpString = "Kills all the loaded entities"
+		},
+		["/le"] =
+		{
+			Permission = "debuggers",
+			Handler = HandleListEntitiesCmd,
+			HelpString = "Shows a list of all the loaded entities"
+		},
+		["/nick"] =
+		{
+			Permission = "debuggers",
+			Handler = HandleNickCmd,
+			HelpString = "Gives you a custom name",
+		},
+		["/pickups"] =
+		{
+			Permission = "debuggers",
+			Handler = HandlePickups,
+			HelpString = "Spawns random pickups around you"
+		},
+		["/poison"] =
+		{
+			Permission = "debuggers",
+			Handler = HandlePoisonCmd,
+			HelpString = "Sets food-poisoning for 15 seconds"
+		},
+		["/poof"] =
+		{
+			Permission = "debuggers",
+			Handler = HandlePoof,
+			HelpString = "Nudges pickups close to you away from you"
+		},
+		["/rmitem"] =
+		{
+			Permission = "debuggers",
+			Handler = HandleRMItem,
+			HelpString = "Remove the specified item from the inventory."
+		},
+		["/sb"] =
+		{
+			Permission = "debuggers",
+			Handler = HandleSetBiome,
+			HelpString = "Sets the biome around you to the specified one"
+		},
+		["/sched"] =
+		{
+			Permission = "debuggers",
+			Handler = HandleSched,
+			HelpString = "Schedules a simple countdown using cWorld:ScheduleTask()"
+		},
+		["/spidey"] =
+		{
+			Permission = "debuggers",
+			Handler = HandleSpideyCmd,
+			HelpString = "Shoots a line of web blocks until it hits non-air"
+		},
+		["/starve"] =
+		{
+			Permission = "debuggers",
+			Handler = HandleStarveCmd,
+			HelpString = "Sets the food level to zero"
+		},
+		["/testwnd"] =
+		{
+			Permission = "debuggers",
+			Handler = HandleTestWndCmd,
+			HelpString = "Opens up a window using plugin API"
+		},
+		["/wesel"] =
+		{
+			Permission = "debuggers",
+			Handler = HandleWESel,
+			HelpString = "Expands the current WE selection by 1 block in X/Z"
+		},
+		["/wool"] =
+		{
+			Permission = "debuggers",
+			Handler = HandleWoolCmd,
+			HelpString = "Sets all your armor to blue wool"
+		},
+		["/xpa"] =
+		{
+			Permission = "debuggers",
+			Handler = HandleAddExperience,
+			HelpString = "Adds 200 experience to the player"
+		},
+		["/xpr"] =
+		{
+			Permission = "debuggers",
+			Handler = HandleRemoveXp,
+			HelpString = "Remove all xp"
+		},
+	},  -- Commands
+	
+	ConsoleCommands =
+	{
+		["sched"] =
+		{
+			Handler = HandleConsoleSchedule,
+			HelpString = "Tests the world scheduling",
+		},
+		["loadchunk"] =
+		{
+			Handler = HandleConsoleLoadChunk,
+			HelpString = "Loads the specified chunk into memory",
+		},
+		["preparechunk"] =
+		{
+			Handler = HandleConsolePrepareChunk,
+			HelpString = "Prepares the specified chunk completely (load / gen / light)",
+		}
+	},  -- ConsoleCommands
+}  -- g_PluginInfo
+
+
+
+
diff --git a/MCServer/Plugins/InfoDump.lua b/MCServer/Plugins/InfoDump.lua
index de1d1f451..07a534b88 100644
--- a/MCServer/Plugins/InfoDump.lua
+++ b/MCServer/Plugins/InfoDump.lua
@@ -444,7 +444,18 @@ local function BuildPermissions(a_PluginInfo)
 				Permissions[info.Permission] = Permission
 				-- Add the command to the list of commands using this permission:
 				Permission.CommandsAffected = Permission.CommandsAffected or {}
-				table.insert(Permission.CommandsAffected, CommandString)
+				-- First, make sure that we don't already have this command in the list,
+				-- it may have already been present in a_PluginInfo
+				local NewCommand = true
+				for _, existCmd in ipairs(Permission.CommandsAffected) do
+					if CommandString == existCmd then
+						NewCommand = false
+						break
+					end
+				end
+				if NewCommand then
+					table.insert(Permission.CommandsAffected, CommandString)
+				end
 			end
 			
 			-- Process the command param combinations for permissions:
diff --git a/MCServer/Plugins/InfoReg.lua b/MCServer/Plugins/InfoReg.lua
index da5a9972c..92c4a2e59 100644
--- a/MCServer/Plugins/InfoReg.lua
+++ b/MCServer/Plugins/InfoReg.lua
@@ -51,6 +51,7 @@ local function MultiCommandHandler(a_Split, a_Player, a_CmdString, a_CmdInfo, a_
 			return a_CmdInfo.Handler(a_Split, a_Player);
 		end
 		-- Let the player know they need to give a subcommand:
+		assert(type(a_CmdInfo.Subcommands) == "table", "Info.lua error: There is no handler for command \"" .. a_CmdString .. "\" and there are no subcommands defined at level " .. a_Level)
 		ListSubcommands(a_Player, a_CmdInfo.Subcommands, a_CmdString);
 		return true;
 	end
diff --git a/MCServer/crafting.txt b/MCServer/crafting.txt
index 8e68d5cb5..4d28b1f52 100644
--- a/MCServer/crafting.txt
+++ b/MCServer/crafting.txt
@@ -75,7 +75,6 @@ Wool                    = String,    1:1, 1:2, 2:1, 2:2
 TNT                     = Gunpowder, 1:1, 3:1, 2:2, 1:3, 3:3 | Sand, 2:1, 1:2, 3:2, 2:3
 PillarQuartzBlock       = QuartzSlab, 1:1, 1:2
 ChiseledQuartzBlock, 2  = QuartzBlock, 1:1, 1:2
-CoalBlock               = Coal, 1:1, 1:2, 1:3, 2:1, 2:2, 2:3, 3:1, 3:2, 3:3
 HayBale                 = Wheat, 1:1, 1:2, 1:3, 2:1, 2:2, 2:3, 3:1, 3:2, 3:3
 SnowBlock               = SnowBall,  1:1, 1:2, 2:1, 2:2
 ClayBlock               = Clay,      1:1, 1:2, 2:1, 2:2
diff --git a/MCServer/furnace.txt b/MCServer/furnace.txt
index 0c12a798d..7179b5299 100644
--- a/MCServer/furnace.txt
+++ b/MCServer/furnace.txt
@@ -52,7 +52,7 @@ RawBeef          = Steak
 RawChicken       = CookedChicken
 Clay             = Brick
 ClayBlock        = HardenedClay
-TallGrass        = NetherBrickItem
+Netherrack       = NetherBrickItem
 RawFish          = CookedFish
 Log              = CharCoal
 Cactus           = GreenDye
@@ -90,6 +90,25 @@ RawMutton        = CookedMutton
 ! CoalBlock       = 16000  # -> 800 sec
 ! BlazeRod        = 2400   # -> 120 sec
 ! NoteBlock       = 300    # -> 15 sec
+! HugeRedMushroom = 300    # -> 15 sec
+! HugeBrownMushroom = 300  # -> 15 sec
+! Banner          = 300    # -> 15 sec
+! BlackBanner     = 300    # -> 15 sec
+! RedBanner       = 300    # -> 15 sec
+! GreenBanner     = 300    # -> 15 sec
+! BrownBanner     = 300    # -> 15 sec
+! BlueBanner      = 300    # -> 15 sec
+! PurpleBanner    = 300    # -> 15 sec
+! CyanBanner      = 300    # -> 15 sec
+! SilverBanner    = 300    # -> 15 sec
+! GrayBanner      = 300    # -> 15 sec
+! PinkBanner      = 300    # -> 15 sec
+! LimeBanner      = 300    # -> 15 sec
+! YellowBanner    = 300    # -> 15 sec
+! LightBlueBanner = 300    # -> 15 sec
+! MagentaBanner   = 300    # -> 15 sec
+! OrangeBanner    = 300    # -> 15 sec
+! WhiteBanner     = 300    # -> 15 sec
 ! DaylightSensor  = 300    # -> 15 sec
 ! FenceGate       = 300    # -> 15 sec
 ! SpruceFenceGate = 300    # -> 15 sec
diff --git a/MCServer/webadmin/files/guest.html b/MCServer/webadmin/files/guest.html
new file mode 100644
index 000000000..7ae78a3f0
--- /dev/null
+++ b/MCServer/webadmin/files/guest.html
@@ -0,0 +1,2 @@
+Hello! Welcome to the MCServer WebAdmin.<br>
+This is a default message, edit <b>files/guest.html</b> to add your own custom message.
diff --git a/MCServer/webadmin/files/header.png b/MCServer/webadmin/files/header.png
new file mode 100644
index 000000000..97b067715
--- /dev/null
+++ b/MCServer/webadmin/files/header.png
diff --git a/MCServer/webadmin/files/home.gif b/MCServer/webadmin/files/home.gif
new file mode 100644
index 000000000..b10e0bed7
--- /dev/null
+++ b/MCServer/webadmin/files/home.gif
diff --git a/MCServer/webadmin/files/loading.gif b/MCServer/webadmin/files/loading.gif
new file mode 100644
index 000000000..b8d06f669
--- /dev/null
+++ b/MCServer/webadmin/files/loading.gif
diff --git a/MCServer/webadmin/files/log_out.png b/MCServer/webadmin/files/log_out.png
new file mode 100644
index 000000000..63232417a
--- /dev/null
+++ b/MCServer/webadmin/files/log_out.png
diff --git a/MCServer/webadmin/files/login.css b/MCServer/webadmin/files/login.css
new file mode 100644
index 000000000..5d87da4c5
--- /dev/null
+++ b/MCServer/webadmin/files/login.css
@@ -0,0 +1,219 @@
+/* Copyright Justin S and MCServer Team, licensed under CC-BY-SA 3.0 */
+* {
+    margin: 0;
+}
+
+body {
+    font-family: "HelveticaNeue-Light", "Helvetica Neue Light", "Helvetica Neue", Helvetica, Arial, "Lucida Grande", sans-serif;
+    -webkit-font-smoothing: antialiased;
+    background: #fff url(header.png) repeat-x top left;
+    width: 100%;
+    min-width: 100%;
+    overflow: hidden;
+}
+
+a:link {
+    color: #555;
+    text-decoration: none;
+}
+
+a:visited {
+    color: #444;
+    text-decoration: none;
+}
+
+a:hover, a:active {
+    color: #000;
+    text-decoration: underline;
+}
+
+img {
+    border: none;
+}
+
+h1 {
+    color: #069;
+}
+
+.row1 {
+    border-bottom: 1px solid #000;
+    height: 100px;
+    max-height: 100px;
+}
+
+.row2 {
+    margin: 0 auto;
+    text-align: center;
+    vertical-align: middle;
+}
+
+.contention {
+    color: #000;
+    text-align: left;
+    line-height: 1.4;
+    margin: 0;
+    font-family: Tahoma,Verdana,Arial,Sans-Serif;
+    font-size: 13px;
+}
+
+button {
+    background: #fff;
+    color: #000;
+    border: 1px solid #ccc;
+    padding: 3px;
+    font-family: Tahoma,Verdana,Arial,Sans-Serif;
+    -moz-border-radius: 5px;
+    -webkit-border-radius: 5px;
+    border-radius: 5px;
+    margin: -3px 0;
+}
+
+button:hover {
+    border-top-color: #28597a;
+    background: #28597a;
+    color: #ccc;
+}
+
+button:active {
+    border-top-color: #1b435e;
+    background: #1b435e;
+}
+
+.push10 {
+    padding-bottom: 75px;
+}
+
+#panel .upper {
+    background: #dcdbdc url(tcat.png) repeat-x;
+    border-top: 1px solid #fff;
+    border-bottom: 1px solid #bbb;
+    padding: 7px;
+}
+
+#footer {
+    z-index: 99999;
+}
+
+#footer ul.menu {
+    margin: 0;
+    padding: 0;
+    list-style: none;
+}
+
+#footer ul.menu li {
+    margin: 0 5px;
+    display: inline;
+}
+
+#footer .upper {
+    background: #dcdbdc url(tcat.png) repeat-x;
+    border-top: 1px solid #bbb;
+    padding: 6px;
+    overflow: hidden;
+    font-size: 12px;
+}
+
+#footer .upper ul.bottom_links {
+    float: left;
+    margin: 3px 0 0 -5px;
+}
+
+#footer .lower {
+    background: #a1a2a2 url(thead.png) top left repeat-x;
+    color: #fff;
+    border-top: 1px solid #ccc;
+    border-bottom: 1px solid #ddd;
+    overflow: hidden;
+    padding: 8px;
+    font-size: 11px;
+}
+
+#footer .lower a:link, #footer .lower a:visited {
+    color: #fff;
+    font-weight: 700;
+}
+
+#footer .lower a:hover, #footer .lower a:active {
+    color: #fff;
+    font-weight: 700;
+}
+
+#footer .lower #current_time {
+    float: right;
+    padding-right: 6px;
+}
+
+.wrapper {
+    width: 85%;
+    min-width: 970px;
+    max-width: 1500px;
+    margin: auto;
+}
+
+#footer {
+    position: fixed;
+    left: 0;
+    bottom: 0;
+    height: 60px;
+    width: 100%;
+    background: #999;
+    border-top: 1px #000 solid;
+}
+
+* html #footer {
+    position: absolute;
+    top: expression((0-(footer.offsetHeight)+(document.documentElement.clientHeight ? document.documentElement.clientHeight : document.body.clientHeight)+(ignoreMe = document.documentElement.scrollTop ? document.documentElement.scrollTop : document.body.scrollTop))+'px');
+}
+
+tr td.trow2:first-child {
+    border-left: 0;
+}
+
+tr td.trow2:last-child {
+    border-right: 0;
+}
+
+.tborder {
+    -moz-border-radius: 7px;
+    -webkit-border-radius: 7px;
+    border-radius: 7px;
+}
+
+.thead, .rounded_top {
+    -moz-border-radius-topleft: 6px;
+    -moz-border-radius-topright: 6px;
+    -webkit-border-top-left-radius: 6px;
+    -webkit-border-top-right-radius: 6px;
+    border-top-left-radius: 6px;
+    border-top-right-radius: 6px;
+}
+
+table {
+    color: #000;
+    font-size: 13px;
+}
+
+.tborder {
+    background: #fff;
+    width: 100%;
+    margin: auto;
+    border: 1px solid #ccc;
+    padding: 1px;
+}
+
+.thead {
+    background: #a1a2a2 url(thead.png) top left repeat-x;
+    color: #fff;
+    border-bottom: 1px solid #8e8f8f;
+    padding: 8px;
+}
+
+.trow2 {
+    background: #efefef;
+    border: 1px solid;
+    border-color: #fff #ddd #ddd #fff;
+}
+
+.padtopp {
+    padding-top: 25px;
+}
diff --git a/MCServer/webadmin/files/login.gif b/MCServer/webadmin/files/login.gif
new file mode 100644
index 000000000..ce2cb6fc0
--- /dev/null
+++ b/MCServer/webadmin/files/login.gif
diff --git a/MCServer/webadmin/files/logo_login.png b/MCServer/webadmin/files/logo_login.png
new file mode 100644
index 000000000..d2155f928
--- /dev/null
+++ b/MCServer/webadmin/files/logo_login.png
diff --git a/MCServer/webadmin/files/pmfolder.gif b/MCServer/webadmin/files/pmfolder.gif
new file mode 100644
index 000000000..3fc68fdcb
--- /dev/null
+++ b/MCServer/webadmin/files/pmfolder.gif
diff --git a/MCServer/webadmin/files/style.css b/MCServer/webadmin/files/style.css
index 7f01b34b2..7c0671970 100644
--- a/MCServer/webadmin/files/style.css
+++ b/MCServer/webadmin/files/style.css
@@ -1,353 +1,427 @@
-body, html
-{
-	font-family: "Open Sans", Tahoma, sans-serif;
-	padding: 0;
-	margin: 0;
-	font-weight: 400;
-	background-color: #fbe9e7;
-	color: rgba(0, 0, 0, 0.87);
+/* Copyright Justin S and MCServer Team, licensed under CC-BY-SA 3.0 */
+* {
+    margin: 0;
 }
 
-.light { font-weight: 300; }
-.bold { font-weight: 600; }
+body {
+    font-family: "HelveticaNeue-Light", "Helvetica Neue Light", "Helvetica Neue", Helvetica, Arial, "Lucida Grande", sans-serif;
+    -webkit-font-smoothing: antialiased;
+    background: #fff;
+    width: 100%;
+    min-width: 100%;
+	height:100%;
+	min-height:100%;
+    overflow-y: scroll;
+    overflow-x: hidden;
+}
+
+a:link {
+    color: #555;
+    text-decoration: none;
+}
+
+a:visited {
+    color: #444;
+    text-decoration: none;
+}
 
-#wrapper
-{
-	background-color: #ff5722;
-	margin: 40px auto;
-	width: 99%;
-	max-width: 1200px;
-	box-sizing: border-box;
-	-moz-box-sizing: border-box;
-	box-shadow: 0px 4px 5px rgba(0, 0, 0, 0.15);
-	color: rgba(0, 0, 0, 0.87);
+a:hover, a:active {
+    color: #000;
+    text-decoration: underline;
 }
 
-.title
-{
-	font-size: 30pt;
-	padding: 10px 40px;
-	text-decoration: none;
-	color: white;
-	text-shadow: 0px 1px 2px rgba(0, 0, 0, 0.3);
-	display: block;
+img {
+    border: none;
 }
 
-#sidebar
-{
-	float: left;
-	width: 20%;
+h1 {
+    color: #069;
+    text-shadow: 2px 2px #000;
 }
 
-.sideNav
-{
-	list-style: none;
-	background-color: #fafafa;
-	margin: 20px 0;
-	padding: 5px 0;
-	width: 100%;
-	box-shadow: 1px 0px 10px rgba(0, 0, 0, 0.2);
+.row1 {
+    border-bottom: 1px #000 solid;
+    height: 100px;
+    max-height: 100px;
+    background: #fff url(header.png) repeat-x top left;
 }
 
-.sideNav li
-{
-	padding: 10px;
-	color: rgba(0, 0, 0, 0.54);
+.row2 {
+    margin: 0 auto;
+    text-align: center;
+    vertical-align: middle;
+    margin-top: 25px;
+	margin-bottom: 25px;
 }
 
-.sideNav li.link
-{
-	padding-left: 30px;
+.contention {
+    color: #000;
+    text-align: left;
+    line-height: 1.4;
+    margin: 0;
+    font-family: Tahoma,Verdana,Arial,Sans-Serif;
+    font-size: 13px;
+	margin-bottom:75px;
 }
 
-.sideNav li.link a
-{
-	text-decoration: none;
-	color: rgba(0, 0, 0, 0.87);
+.push25 {
 }
 
-#container
-{
-	margin: 0;
-	padding: 0;
-	overflow: hidden;
-	background-color: #f5f5f5;
+#panel ul.menu {
+    margin: 0;
+    padding: 0;
+    list-style: none;
 }
 
-#main
-{
-	float: right;
-	width: 80%;
-	padding: 0 15px 20px 15px;
-	box-sizing: border-box;
-	-moz-box-sizing: border-box;
+#panel ul.menu li {
+    margin: 0 5px;
+    display: inline;
 }
 
-.clear
-{
-	clear: both;
+#panel ul.menu li a {
+    padding-left: 20px;
+    background-repeat: no-repeat;
+    background-position: left center;
 }
 
-table
-{
-	width: 100%;
-	border-collapse: collapse;
+#panel .upper ul.top_links {
+    float: right;
+    font-weight: 700;
 }
 
-table td
-{
-	padding: 5px;
+#panel .upper {
+    background: #dcdbdc url(tcat.png) repeat-x;
+    border-top: 1px solid #fff;
+    border-bottom: 1px solid #bbb;
+    padding: 7px;
 }
 
-table th
-{
-	border-bottom: 1px solid rgba(0, 0, 0, 0.12);
-	padding: 5px;
-	text-align: center;
+#footer ul.menu {
+    margin: 0;
+    padding: 0;
+    list-style: none;
 }
 
-table tr:nth-child(odd)
-{
-	background-color: rgba(0, 0, 0, 0.015);
+#footer ul.menu li {
+    margin: 0 5px;
+    display: inline;
 }
 
-p
-{
-	margin: 8px 0;
-	padding: 8px 3px;
+#footer .upper {
+    background: #dcdbdc url(tcat.png) repeat-x;
+    border-top: 1px solid #bbb;
+    padding: 6px;
+    overflow: hidden;
+    font-size: 12px;
 }
 
-a
-{
-	text-decoration: none;
-	color: #0277bd;
-	-webkit-transition: color 0.1s linear;
-	-moz-transition: color 0.1s linear;
-	transition: color 0.1s linear;
+#footer .upper ul.bottom_links {
+    float: left;
+    margin: 3px 0 0 -5px;
 }
 
-a:hover
-{
-	color: #01579b;
+#footer .lower {
+    background: #a1a2a2 url(thead.png) top left repeat-x;
+    color: #fff;
+    border-top: 1px solid #ccc;
+    border-bottom: 1px solid #ddd;
+    overflow: hidden;
+    padding: 8px;
+    font-size: 11px;
 }
 
-.welcome-msg
-{
-	color: rgba(0, 0, 0, 0.54);
+#footer .lower a:link,#footer .lower a:visited {
+    color: #fff;
+    font-weight: 700;
 }
 
-.username
-{
-	text-transform: capitalize;
-	color: rgba(0, 0, 0, 0.87);
+#footer .lower a:hover,#footer .lower a:active {
+    color: #fff;
+    font-weight: 700;
 }
 
-a:hover
-{
-	color: black;
+#footer .lower #current_time {
+    float: right;
+    padding-right: 6px;
 }
 
-input, select
-{
-	padding: 8px;
+.wrapper {
+    width: 85%;
+    min-width: 970px;
+    max-width: 1500px;
+    margin: auto;
 }
 
-form
-{
-	padding: 4px;
+#footer {
+	position: fixed;
+	left:0;
+	bottom:0;
+    height: 61px;
+    width: 100%;
+    background: #999;
+    border-top: 1px #000 solid;
+	border-bottom: 1px #000 solid;
 }
 
-.info input[type="submit"], .info button, .info input[type="button"],
-.warn input[type="submit"], .warn button, .warn input[type="button"],
-.err input[type="submit"], .err button, .err input[type="button"]
-{
-	float: right;
+* html #footer {
+    position: absolute;
+    top: expression((0-(footer.offsetHeight)+(document.documentElement.clientHeight ? document.documentElement.clientHeight : document.body.clientHeight)+(ignoreMe = document.documentElement.scrollTop ? document.documentElement.scrollTop : document.body.scrollTop))+'px');
 }
 
-.err
-{
-	color: white;
-	display: block;
-	background-color: #e51c23 !important;
-	padding: 15px;
-	line-height: 30px;
-	min-height: 30px;
+tr td.trow1:first-child, tr td.trow2:first-child {
+    border-left: 0;
 }
 
-.err:before
-{
-	content: "ERROR: ";
+tr td.trow1:last-child, tr td.trow2:last-child {
+    border-right: 0;
 }
 
-.warn
-{
-	color: white;
-	display: block;
-	background-color: #ff5722 !important;
-	padding: 15px;
-	line-height: 30px;
-	min-height: 30px;
+.tborder {
+    -moz-border-radius: 7px;
+    -webkit-border-radius: 7px;
+    border-radius: 7px;
 }
 
-.warn:before
-{
-	content: "WARNING: ";
+.thead {
+    -moz-border-radius-topleft: 6px;
+    -moz-border-radius-topright: 6px;
+    -webkit-border-top-left-radius: 6px;
+    -webkit-border-top-right-radius: 6px;
+    border-top-left-radius: 6px;
+    border-top-right-radius: 6px;
 }
 
-.info
-{
-	color: white;
-	display: block;
-	background-color: #5677fc !important;
-	padding: 15px;
-	line-height: 30px;
-	min-height: 30px;
+table {
+    color: #000;
+    font-size: 13px;
 }
 
-.info:before
-{
-	content: "INFORMATION: ";
+.tborder {
+    background: #fff;
+    width: 100%;
+    margin: auto;
+    border: 1px solid #ccc;
+    padding: 1px;
 }
 
-#footer .fleft
-{
-	float: left;
+.thead {
+    background: #a1a2a2 url(thead.png) top left repeat-x;
+    color: #fff;
+    border-bottom: 1px solid #8e8f8f;
+    padding: 8px;
 }
 
-#footer .fright
-{
-	float: right;
-	text-align: right;
+.tcat {
+    background: #dcdbdc url(tcat.png) repeat-x;
+    color: #fff;
+    border-bottom: 1px solid #bbb;
+    padding: 6px;
+    font-size: 12px;
 }
 
-#footer
-{
-	margin: 0;
-	padding: 10px;
-	font-size: 9pt;
-	color: rgba(255, 255, 255, 0.8);
-	box-shadow: 0px 2px 3px rgba(0, 0, 0, 0.2) inset;
+.trow1 {
+    background: #f5f5f5;
+    border: 1px solid;
+    border-color: #fff #ddd #ddd #fff;
 }
 
-#footer a
-{
-	text-transform: none;
-	color: white;
+.trow2 {
+    background: #efefef;
+    border: 1px solid;
+    border-color: #fff #ddd #ddd #fff;
+    padding: 15px;
+    box-sizing: border-box;
+    -moz-box-sizing: border-box;
 }
 
-input[type="submit"], button, input[type="button"]
-{
-	background-color: #ffc107;
-	padding: 8px 15px 8px 15px;
-	margin: 0 2px;
-	display: inline-block;
-	text-align: center;
-	color: black;
-	box-shadow: 0px 2px 3px rgba(0,0,0,0.2);
-	border: none;
-	outline: none;
-	cursor: pointer;
+table {
+    color: #000;
+    font-size: 13px;
+    text-align: left;
 }
 
-input[type="submit"]:hover, button:hover, input[type="button"]:hover
-{
-	background-color: #ffca28;
+.tborder {
+    background: #fff;
+    width: 100%;
+    margin: auto;
+    border: 1px solid #ccc;
+    padding: 1px;
 }
 
-input[type="submit"]:active, button:active, input[type="button"]:active
-{
-	background-color: #ffd54f;
-	-webkit-transform: translateY(1px);
-	   -moz-transform: translateY(1px);
-			transform: translateY(1px);
+.thead {
+    background: #a1a2a2 url(thead.png) top left repeat-x;
+    color: #fff;
+    border-bottom: 1px solid #8e8f8f;
+    padding: 8px;
 }
 
-hr
-{
-	border: none;
-	height: 1px;
-	background-color: rgba(0, 0, 0, 0.12);
+.tcat {
+    background: #dcdbdc url(tcat.png) repeat-x;
+    color: #fff;
+    border-bottom: 1px solid #bbb;
+    padding: 6px;
+    font-size: 12px;
 }
 
-h4
-{
-	padding-bottom: 10px;
-	margin-bottom: 12px;
-	border-bottom: 1px solid rgba(0, 0, 0, 0.12);
+.trow1 {
+    background: #f5f5f5;
+    border: 1px solid;
+    border-color: #fff #ddd #ddd #fff;
 }
 
+.trow2 {
+    background: #efefef;
+    border: 1px solid;
+    border-color: #fff #ddd #ddd #fff;
+}
 
-/**** PAGE SPECIFIC CSS ****/
+.smalltext {
+    font-size: 11px;
+}
 
-/* remove the * for disabling: */
+textarea {
+    background: #fff;
+    color: #000;
+    border: 1px solid #ccc;
+    padding: 2px;
+    line-height: 1.4;
+    font-family: Tahoma,Verdana,Arial,Sans-Serif;
+    font-size: 13px;
+}
 
-.page-core-server-settings table td
-{
-	text-align: center;
-	width: 25%;
+select {
+    background: #fff;
+    padding: 3px;
+    border: 1px solid #ccc;
+    font-family: Tahoma,Verdana,Arial,Sans-Serif;
 }
 
-.page-core-server-settings.no-param table td:nth-child(1) a,
-.page-core-server-settings.param-tab-general table td:nth-child(1) a
-{
-	font-weight: 600;
-	color: rgba(0, 0, 0, 0.87);
+.usercp_nav_item {
+    display: block;
+    padding: 1px 0 1px 23px;
 }
 
-.page-core-server-settings.param-tab-monsters table td:nth-child(2) a
-{
-	font-weight: 600;
-	color: rgba(0, 0, 0, 0.87);
+.usercp_nav_pmfolder {
+    background: url(pmfolder.gif) no-repeat left center;
 }
 
-.page-core-server-settings.param-tab-worlds table td:nth-child(3) a
-{
-	font-weight: 600;
-	color: rgba(0, 0, 0, 0.87);
+.usercp_nav_sub_pmfolder {
+    padding-left: 40px;
+    background: url(sub_pmfolder.gif) no-repeat left center;
 }
 
-.page-core-server-settings.param-tab-world table td:nth-child(4) a
-{
-	font-weight: 600;
-	color: rgba(0, 0, 0, 0.87);
+.usercp_nav_home {
+    background: url(home.gif) no-repeat left center;
 }
 
-.page-core-permissions form table tr,
-.page-core-permissions form table td,
-.page-core-permissions form table th
-{
-	border: none;
-	background-color: transparent;
+.pagehead {
+    top: 0;
+    left: 0;
+    width: 100%;
 }
 
-.page-core-permissions form table tr:nth-child(1) th
-{
-	width: 35%;
+table {
+    width: 100%;
 }
 
-.page-core-permissions form table tr:nth-child(1) td
-{
-	width: 65%;
+table th {
+    border-bottom: 1px solid rgba(0,0,0,0.12);
+    padding: 5px;
+    text-align: left;
 }
 
-.page-core-permissions form table td input
-{
-	width: 100%;
-	box-sizing: border-box;
-	-moz-box-sizing: border-box;
-	margin: 0;
+table tr:nth-child(odd) {
+    background-color: rgba(0,0,0,0.015);
 }
 
-#ChatDiv
-{
-	margin-bottom: 10px;
+p {
+    margin: 4px 0;
+    padding: 4px 3px;
 }
 
-#ChatMessage
-{
-	width: 100%;
-	box-sizing: border-box;
-	-moz-box-sizing: border-box;
+a {
+    text-decoration: none;
+    color: #000;
+    -webkit-transition: color .1s linear;
+    -moz-transition: color .1s linear;
+    transition: color .1s linear;
 }
 
-/**/
+a:hover {
+    color: #888;
+}
+
+input[type="text"] {
+    background: #fff;
+    color: #000;
+    border: 1px solid #ccc;
+    padding: 2px;
+    line-height: 1.4;
+    font-family: Tahoma,Verdana,Arial,Sans-Serif;
+    font-size: 13px;
+    -moz-border-radius: 5px;
+    -webkit-border-radius: 5px;
+    border-radius: 5px;
+}
+
+input[type="text"]:hover {
+    background-color: #E5E4E2;
+}
+
+input[type="text"]:focus {
+    background-color: #E5E4E2;
+}
+
+hr {
+    border: none;
+    height: 1px;
+    background-color: rgba(0,0,0,0.12);
+}
+
+h4 {
+    padding-bottom: 10px;
+    margin-bottom: 12px;
+    border-bottom: 1px solid rgba(0,0,0,0.12);
+}
+
+#ChatDiv {
+    margin-bottom: 10px;
+}
+
+#ChatMessage {
+    width: 92%;
+    margin-right: 5px;
+    box-sizing: border-box;
+    -moz-box-sizing: border-box;
+}
+
+input[type="submit"] {
+    padding: 3px;
+    padding-left: 5px;
+    padding-right: 5px;
+    cursor: pointer;
+    font-family: Tahoma,Verdana,Arial,Sans-Serif;
+    -moz-border-radius: 5px;
+    -webkit-border-radius: 5px;
+    border-radius: 5px;
+    background: #f5f5f5;
+    border: 1px solid #ccc;
+}
+
+input[type="submit"]:hover {
+    background-color: #E5E4E2;
+}
+
+button:disabled,input:disabled {
+    padding: 3px;
+    padding-left: 5px;
+    padding-right: 5px;
+    cursor: pointer;
+    font-family: Tahoma,Verdana,Arial,Sans-Serif;
+    -moz-border-radius: 5px;
+    -webkit-border-radius: 5px;
+    border-radius: 5px;
+    border: none!important;
+    color: #fff!important;
+    background-color: #ccc!important;
+}
diff --git a/MCServer/webadmin/files/sub_pmfolder.gif b/MCServer/webadmin/files/sub_pmfolder.gif
new file mode 100644
index 000000000..3d0d6e627
--- /dev/null
+++ b/MCServer/webadmin/files/sub_pmfolder.gif
diff --git a/MCServer/webadmin/files/tcat.png b/MCServer/webadmin/files/tcat.png
new file mode 100644
index 000000000..eb64eb3d6
--- /dev/null
+++ b/MCServer/webadmin/files/tcat.png
diff --git a/MCServer/webadmin/files/thead.png b/MCServer/webadmin/files/thead.png
new file mode 100644
index 000000000..81aa04bac
--- /dev/null
+++ b/MCServer/webadmin/files/thead.png
diff --git a/MCServer/webadmin/login_template.html b/MCServer/webadmin/login_template.html
index 913a85db0..7a8601065 100644
--- a/MCServer/webadmin/login_template.html
+++ b/MCServer/webadmin/login_template.html
@@ -1,25 +1,69 @@
+<!-- Copyright Justin S and MCServer Team, licensed under CC-BY-SA 3.0 */ -->
 <html>
 <head>
 	<title>MCServer WebAdmin - Login</title>
-	<meta charset="UTF-8">
+	<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
+	<link href="login.css" rel="stylesheet" type="text/css">
 	<link rel="icon" href="favicon.ico">
-	<style type="text/css">
-		header {
-			margin: 0 auto;
-			text-align: center;
-			vertical-align: middle;
-		}
-	</style>
 </head>
-
 <body>
-	<header>
-		<img src="mc-logo.png" alt="MCServer Logo" class="logo">
-		<h1>MCServer - WebAdmin</h1>
-		<form method="get" action="webadmin/">
-			<input type="submit" value="Log in">
-		</form>
-	</header>
+<div class="contention">
+	<div class="row1">
+		<div class="wrapper">
+			<img src="logo_login.png" alt="MCServer Logo" class="logo">
+		</div>
+	</div>
+	<div id="panel">
+		<div class="upper">
+			<div class="wrapper">
+				<div>
+					<form method="get" action="webadmin/" />
+						<button type="submit" value="Log in" style="width:150px;height:25px;font-family:'Source Sans Pro',sans-serif;background:transparent;border:none!important;vertical-align:middle">
+							<strong><img src="login.gif" style="vertical-align:bottom" /> WebAdmin Log in</strong>
+						</button>
+					</form>
+				</div>
+			</div>
+		</div>
+	</div>
+	<div class="row2 push10">
+		<div class="wrapper padtopp">
+			<table border="0" cellspacing="0" cellpadding="5" class="tborder" style="margin-bottom:5px">
+				<tbody>
+					<tr>
+						<td class="thead rounded_top">
+							<div style="float:left!important"><strong>MCServer WebAdmin</strong></div>
+						</td>
+					</tr>
+					<tr>
+						<td class="trow2 post_content">
+							<div class="post_body">
+								<iframe width="100%" height="100%" style="border:none;min-height:350px;max-height:450px" src="/guest.html"></iframe>
+							</div>
+						</td>
+					</tr>
+				</tbody>
+			</table>
+		</div>
+	</div>
+</div>
+<div id="footer">
+	<div class="upper">
+		<div class="wrapper">
+			<ul class="menu bottom_links">
+				<li><a href="http://www.mc-server.org" target="_blank">MCServer</a></li>
+				<li><a href="http://forum.mc-server.org" target="_blank">Forums</a></li>
+				<li><a href="http://builds.cuberite.org" target="_blank">Buildserver</a></li>
+				<li><a href="http://mc-server.xoft.cz/LuaAPI" target="_blank">API Documentation</a></li>
+				<li><a href="http://book.mc-server.org/" target="_blank">User's Manual</a></li>
+			</ul>
+		</div>
+	</div>
+	<div class="lower">
+		<div class="wrapper">
+			<span id="copyright">Copyright © <a href="http://www.mc-server.org" target="_blank">MCServer Team</a> 2014.</span>
+		</div>
+	</div>
+</div>
 </body>
-
 </html>
diff --git a/MCServer/webadmin/template.lua b/MCServer/webadmin/template.lua
index 05ca224b1..4d3934da8 100644
--- a/MCServer/webadmin/template.lua
+++ b/MCServer/webadmin/template.lua
@@ -81,22 +81,56 @@ function ShowPage(WebAdmin, TemplateRequest)
 	end
 	
 	Output([[
-<!DOCTYPE html>
+<!-- Copyright Justin S and MCServer Team, licensed under CC-BY-SA 3.0 -->
+<html>
 <head>
-<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
-<link rel="icon" href="/favicon.ico">
-<title>]] .. Title .. [[</title>
-<link href='http://fonts.googleapis.com/css?family=Open+Sans:400,600,300' rel='stylesheet' type='text/css'>
-<link rel="stylesheet" type="text/css" href="/style.css">
+	<title>]] .. Title .. [[</title>
+	<meta charset="UTF-8">
+	<link rel="stylesheet" type="text/css" href="/style.css">
+	<link rel="icon" href="/favicon.ico">
 </head>
 <body>
-<div id="wrapper">
-	<div id="containerHolder">
-		<a href="./" class="title light">MCServer</a>
-		<div id="container">
-			<div id="sidebar">
-				<ul class="sideNav">
-					<li class='link'><a href=']] .. BaseURL .. [['>Home</a></li>
+<div class="contention push25">
+	<div class="pagehead">
+		<div class="row1">
+			<div class="wrapper">
+				<img src="/logo_login.png" alt="MCServer Logo" class="logo">
+			</div>
+		</div>
+		<div id="panel">
+			<div class="upper">
+				<div class="wrapper">
+					<ul class="menu top_links">
+						<li><a>Server Name: <strong>]] .. cRoot:Get():GetServer():GetServerID() .. [[</strong></a></li>
+						<li><a>Memory: <strong>]] .. MemoryUsageKiB / 1024 .. [[MB</strong></a></li>
+						<li><a>Chunks: <strong>]] .. NumChunks .. [[</strong></a></li>
+					</ul>
+					<div class="welcome"><strong>Welcome back, ]] .. TemplateRequest.Request.Username .. [[</strong>&nbsp;&nbsp;&nbsp;<a href=".././"><img src="/log_out.png" style="vertical-align:bottom;"> Log Out</a></div>
+				</div>
+			</div>
+		</div>
+	</div>
+	<div class="row2">
+		<div class="wrapper">
+			<table width="100%" border="0" align="center">
+				<tbody>
+					<tr>
+						<td width="180" valign="top">
+							<table border="0" cellspacing="0" cellpadding="5" class="tborder">
+							<tbody>
+								<tr>
+									<td class="thead"><strong>Menu</strong></td>
+								</tr>
+								<tr>
+									<td class="trow1 smalltext"><a href=']] .. BaseURL .. [[' class='usercp_nav_item usercp_nav_home'>Home</a></td>
+								</tr>
+								<tr>
+									<td class="tcat"><div><span class="smalltext"><strong><font color="#000">Server Management</font></strong></span></div></td>
+								</tr>
+							</tbody>
+							<tbody style="" id="usercppms_e">
+								<tr>
+									<td class="trow1 smalltext">
 	]])
 
 
@@ -105,30 +139,58 @@ function ShowPage(WebAdmin, TemplateRequest)
 		local PluginWebTitle = value:GetWebTitle()
 		local TabNames = value:GetTabNames()
 		if (GetTableSize(TabNames) > 0) then
-			Output("<li>"..PluginWebTitle.."</li>\n");
+			Output("<div><a class='usercp_nav_item usercp_nav_pmfolder' style='text-decoration:none;'><b>"..PluginWebTitle.."</b></a></div>\n");
 			
 			for webname,prettyname in pairs(TabNames) do
-				Output("<li class='link'><a href='" .. BaseURL .. PluginWebTitle .. "/" .. webname .. "'>" .. prettyname .. "</a></li>\n")
+				Output("<div><a href='" .. BaseURL .. PluginWebTitle .. "/" .. webname .. "' class='usercp_nav_item usercp_nav_sub_pmfolder'>" .. prettyname .. "</a></div>\n")
 			end
+
+			Output("<br>\n");
 		end
 	end
 
 	
 	Output([[
-					</ul>
-			</div>
-			
-			<div id="main" class="page-]] .. string.lower(PluginPage.PluginName .. "-" .. string.gsub(PluginPage.TabName, "[^a-zA-Z0-9]+", "-")) .. reqParamsClass .. [[">
-				<h2 class="welcome-msg">Welcome <span class="username">]] .. TemplateRequest.Request.Username .. [[</span></h2>
-				
-				<hr/>
-				
-				<h3>]] .. SubTitle .. [[</h3>
-					]] .. PageContent .. [[</div>
-			<div class="clear"></div>
+								</td>
+							</tr>
+						</tbody>
+						</table>
+					</td>
+					<td valign="top" style='padding-left:25px;'>
+						<table border="0" cellspacing="0" cellpadding="5" class="tborder">
+						<tbody>
+							<tr>
+								<td class="thead" colspan="2"><strong>]] .. SubTitle .. [[</strong></td>
+							</tr>
+							<tr>
+								<td class="trow2">]] .. PageContent .. [[</td>
+							</tr>
+						</tbody>
+						</table>
+					</td>
+				</tr>
+			</tbody>
+			</table>
+		</div>
+	</div>
+<div id="footer">
+	<div class="upper">
+		<div class="wrapper">
+			<ul class="menu bottom_links">
+				<li><a href="http://www.mc-server.org" target="_blank">MCServer</a></li>
+				<li><a href="http://forum.mc-server.org" target="_blank">Forums</a></li>
+				<li><a href="http://builds.cuberite.org" target="_blank">Buildserver</a></li>
+				<li><a href="http://mc-server.xoft.cz/LuaAPI" target="_blank">API Documentation</a></li>
+				<li><a href="http://book.mc-server.org/" target="_blank">User's Manual</a></li>
+			</ul>
 		</div>
 	</div>
-	<div id="footer"><div class="fleft">running MCServer using <span class="bold">]] .. MemoryUsageKiB / 1024 .. [[MB</span> of memory; <span class="bold">]] .. NumChunks .. [[</span> chunks</div><div class="fright">design by <a href="//www.github.com/WebFreak001">WebFreak001</a></div><div class="clear"></div></div>
+	<div class="lower">
+		<div class="wrapper">
+			<span id="copyright">Copyright © <a href="http://www.mc-server.org" target="_blank">MCServer Team</a> 2014.</span>
+		</div>
+	</div>
+</div>
 </div>
 </body>
 </html>
diff --git a/README.md b/README.md
index 9e9751b35..88080a52f 100644
--- a/README.md
+++ b/README.md
@@ -1,4 +1,4 @@
-MCServer [![Build Status](http://img.shields.io/travis/mc-server/MCServer.svg)](https://travis-ci.org/mc-server/MCServer) [![Coverity Scan Build Status](https://scan.coverity.com/projects/1930/badge.svg)](https://scan.coverity.com/projects/1930) [![tip for next commit](http://tip4commit.com/projects/74.svg)](http://tip4commit.com/projects/74)
+MCServer [![Build Status](http://img.shields.io/travis/mc-server/MCServer/master.svg?style=flat)](https://travis-ci.org/mc-server/MCServer) [![Coverity Scan Build Status](https://scan.coverity.com/projects/1930/badge.svg)](https://scan.coverity.com/projects/1930) [![weekly tips](http://img.shields.io/gratipay/cuberite_team.svg?style=flat)](http://gratipay.com/cuberite_team)  [![tip for next commit](http://tip4commit.com/projects/74.svg)](http://tip4commit.com/projects/74)
 ========
 
 MCServer is a Minecraft server that is written in C++ and designed to be efficient with memory and CPU, as well as having a flexible Lua Plugin API.
@@ -10,6 +10,8 @@ We currently support Release 1.7 and 1.8 (not beta) Minecraft protocol versions.
 Installation
 ------------
 
+[![Install on DigitalOcean](http://doinstall.bearbin.net/button.svg)](http://doinstall.bearbin.net/install?url=https://github.com/mc-server/MCServer)
+
 For Linux there is an easy installation method, just run this in your terminal:
 
     curl -s https://raw.githubusercontent.com/mc-server/MCServer/master/easyinstall.sh | sh
diff --git a/SetFlags.cmake b/SetFlags.cmake
index c0a021c25..0d1bd99b3 100644
--- a/SetFlags.cmake
+++ b/SetFlags.cmake
@@ -64,18 +64,12 @@ macro(set_flags)
 			execute_process(COMMAND ${CMAKE_C_COMPILER} -dumpversion
                 		OUTPUT_VARIABLE GCC_VERSION)
                 endif()
-                
-                if("${CMAKE_CXX_COMPILER_ID}" STREQUAL "GNU" AND (NOT GCC_VERSION VERSION_GREATER 4.6))
-	                set(CMAKE_CXX_FLAGS          "${CMAKE_CXX_FLAGS}          -std=c++0x")
-			set(CMAKE_CXX_FLAGS_DEBUG    "${CMAKE_CXX_FLAGS_DEBUG}    -std=c++0x")
-			set(CMAKE_CXX_FLAGS_COVERAGE "${CMAKE_CXX_FLAGS_COVERAGE} -std=c++0x")
-			set(CMAKE_CXX_FLAGS_RELEASE  "${CMAKE_CXX_FLAGS_RELEASE}  -std=c++0x")
-		else()
-			set(CMAKE_CXX_FLAGS          "${CMAKE_CXX_FLAGS}          -std=c++11")
-			set(CMAKE_CXX_FLAGS_DEBUG    "${CMAKE_CXX_FLAGS_DEBUG}    -std=c++11")
-			set(CMAKE_CXX_FLAGS_COVERAGE "${CMAKE_CXX_FLAGS_COVERAGE} -std=c++11")
-			set(CMAKE_CXX_FLAGS_RELEASE  "${CMAKE_CXX_FLAGS_RELEASE}  -std=c++11")
-		endif()
+
+		set(CMAKE_CXX_FLAGS          "${CMAKE_CXX_FLAGS}          -std=c++11")
+		set(CMAKE_CXX_FLAGS_DEBUG    "${CMAKE_CXX_FLAGS_DEBUG}    -std=c++11")
+		set(CMAKE_CXX_FLAGS_COVERAGE "${CMAKE_CXX_FLAGS_COVERAGE} -std=c++11")
+		set(CMAKE_CXX_FLAGS_RELEASE  "${CMAKE_CXX_FLAGS_RELEASE}  -std=c++11")
+
 		#on os x clang adds pthread for us but we need to add it for gcc
 		if ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "Clang")
 			add_flags_cxx("-stdlib=libc++")
@@ -94,18 +88,11 @@ macro(set_flags)
 			execute_process(COMMAND ${CMAKE_C_COMPILER} -dumpversion
                 		OUTPUT_VARIABLE GCC_VERSION)
                 endif()
-                
-                if("${CMAKE_CXX_COMPILER_ID}" STREQUAL "GNU" AND (NOT GCC_VERSION VERSION_GREATER 4.6))
-	                set(CMAKE_CXX_FLAGS          "${CMAKE_CXX_FLAGS}          -std=c++0x")
-			set(CMAKE_CXX_FLAGS_DEBUG    "${CMAKE_CXX_FLAGS_DEBUG}    -std=c++0x")
-			set(CMAKE_CXX_FLAGS_COVERAGE "${CMAKE_CXX_FLAGS_COVERAGE} -std=c++0x")
-			set(CMAKE_CXX_FLAGS_RELEASE  "${CMAKE_CXX_FLAGS_RELEASE}  -std=c++0x")
-		else()
-			set(CMAKE_CXX_FLAGS          "${CMAKE_CXX_FLAGS}          -std=c++11")
-			set(CMAKE_CXX_FLAGS_DEBUG    "${CMAKE_CXX_FLAGS_DEBUG}    -std=c++11")
-			set(CMAKE_CXX_FLAGS_COVERAGE "${CMAKE_CXX_FLAGS_COVERAGE} -std=c++11")
-			set(CMAKE_CXX_FLAGS_RELEASE  "${CMAKE_CXX_FLAGS_RELEASE}  -std=c++11")
-		endif()
+
+		set(CMAKE_CXX_FLAGS          "${CMAKE_CXX_FLAGS}          -std=c++11")
+		set(CMAKE_CXX_FLAGS_DEBUG    "${CMAKE_CXX_FLAGS_DEBUG}    -std=c++11")
+		set(CMAKE_CXX_FLAGS_COVERAGE "${CMAKE_CXX_FLAGS_COVERAGE} -std=c++11")
+		set(CMAKE_CXX_FLAGS_RELEASE  "${CMAKE_CXX_FLAGS_RELEASE}  -std=c++11")
 
 		# We use a signed char (fixes #640 on RasPi)
 		add_flags_cxx("-fsigned-char")
diff --git a/Tools/AnvilStats/CMakeLists.txt b/Tools/AnvilStats/CMakeLists.txt
index 557a4c17a..688fbe493 100644
--- a/Tools/AnvilStats/CMakeLists.txt
+++ b/Tools/AnvilStats/CMakeLists.txt
@@ -53,7 +53,6 @@ set(SHARED_OSS_SRC
 	../../src/OSSupport/File.cpp
 	../../src/OSSupport/GZipFile.cpp
 	../../src/OSSupport/IsThread.cpp
-	../../src/OSSupport/Timer.cpp
 )
 
 set(SHARED_OSS_HDR
@@ -62,7 +61,6 @@ set(SHARED_OSS_HDR
 	../../src/OSSupport/File.h
 	../../src/OSSupport/GZipFile.h
 	../../src/OSSupport/IsThread.h
-	../../src/OSSupport/Timer.h
 )
 
 flatten_files(SHARED_SRC)
diff --git a/Tools/MCADefrag/CMakeLists.txt b/Tools/MCADefrag/CMakeLists.txt
index 42b42018b..82e048671 100644
--- a/Tools/MCADefrag/CMakeLists.txt
+++ b/Tools/MCADefrag/CMakeLists.txt
@@ -46,6 +46,7 @@ set(SHARED_HDR
 	../../src/ByteBuffer.h
 	../../src/StringUtils.h
 )
+
 flatten_files(SHARED_SRC)
 flatten_files(SHARED_HDR)
 source_group("Shared" FILES ${SHARED_SRC} ${SHARED_HDR})
@@ -54,15 +55,21 @@ set(SHARED_OSS_SRC
 	../../src/OSSupport/CriticalSection.cpp
 	../../src/OSSupport/File.cpp
 	../../src/OSSupport/IsThread.cpp
-	../../src/OSSupport/Timer.cpp
+	../../src/OSSupport/StackTrace.cpp
 )
+
 set(SHARED_OSS_HDR
 	../../src/OSSupport/CriticalSection.h
 	../../src/OSSupport/File.h
 	../../src/OSSupport/IsThread.h
-	../../src/OSSupport/Timer.h
+	../../src/OSSupport/StackTrace.h
 )
 
+if(WIN32)
+	list (APPEND SHARED_OSS_SRC ../../src/StackWalker.cpp)
+	list (APPEND SHARED_OSS_HDR ../../src/StackWalker.h)
+endif()
+
 flatten_files(SHARED_OSS_SRC)
 flatten_files(SHARED_OSS_HDR)
 
diff --git a/Tools/ProtoProxy/CMakeLists.txt b/Tools/ProtoProxy/CMakeLists.txt
index bc3923d90..cca0c1b8b 100644
--- a/Tools/ProtoProxy/CMakeLists.txt
+++ b/Tools/ProtoProxy/CMakeLists.txt
@@ -57,14 +57,20 @@ set(SHARED_OSS_SRC
 	../../src/OSSupport/CriticalSection.cpp
 	../../src/OSSupport/File.cpp
 	../../src/OSSupport/IsThread.cpp
-	../../src/OSSupport/Timer.cpp
+	../../src/OSSupport/StackTrace.cpp
 )
 set(SHARED_OSS_HDR
 	../../src/OSSupport/CriticalSection.h
 	../../src/OSSupport/File.h
 	../../src/OSSupport/IsThread.h
-	../../src/OSSupport/Timer.h
+	../../src/OSSupport/StackTrace.h
 )
+
+if(WIN32)
+	list (APPEND SHARED_OSS_SRC ../../src/StackWalker.cpp)
+	list (APPEND SHARED_OSS_HDR ../../src/StackWalker.h)
+endif()
+
 flatten_files(SHARED_SRC)
 flatten_files(SHARED_HDR)
 flatten_files(SHARED_OSS_SRC)
diff --git a/Tools/ProtoProxy/Connection.cpp b/Tools/ProtoProxy/Connection.cpp
index eaf4fab02..fb2d40e5b 100644
--- a/Tools/ProtoProxy/Connection.cpp
+++ b/Tools/ProtoProxy/Connection.cpp
@@ -189,7 +189,7 @@ cConnection::cConnection(SOCKET a_ClientSocket, cServer & a_Server) :
 	m_Server(a_Server),
 	m_ClientSocket(a_ClientSocket),
 	m_ServerSocket(-1),
-	m_BeginTick(m_Timer.GetNowTime()),
+	m_BeginTick(std::chrono::steady_clock::now()),
 	m_ClientState(csUnencrypted),
 	m_ServerState(csUnencrypted),
 	m_Nonce(0),
@@ -436,7 +436,8 @@ bool cConnection::RelayFromClient(void)
 
 double cConnection::GetRelativeTime(void)
 {
-	return (double)(m_Timer.GetNowTime() - m_BeginTick) / 1000;
+	Int64 msec = std::chrono::duration_cast<std::chrono::milliseconds>(std::chrono::steady_clock::now() - m_BeginTick).count();
+	return static_cast<double>(msec) / 1000;
 }
 
 
diff --git a/Tools/ProtoProxy/Connection.h b/Tools/ProtoProxy/Connection.h
index 1fc9536de..c79273f8a 100644
--- a/Tools/ProtoProxy/Connection.h
+++ b/Tools/ProtoProxy/Connection.h
@@ -10,7 +10,6 @@
 #pragma once
 
 #include "ByteBuffer.h"
-#include "OSSupport/Timer.h"
 #include "PolarSSL++/AesCfb128Decryptor.h"
 #include "PolarSSL++/AesCfb128Encryptor.h"
 
@@ -37,8 +36,7 @@ class cConnection
 	SOCKET m_ClientSocket;
 	SOCKET m_ServerSocket;
 	
-	cTimer m_Timer;
-	long long m_BeginTick;  // Tick when the relative time was first retrieved (used for GetRelativeTime())
+	std::chrono::steady_clock::time_point m_BeginTick;  // Tick when the relative time was first retrieved (used for GetRelativeTime())
 	
 	enum eConnectionState
 	{
diff --git a/Tools/QtBiomeVisualiser/BiomeView.cpp b/Tools/QtBiomeVisualiser/BiomeView.cpp
index b44b935d7..c77b39482 100644
--- a/Tools/QtBiomeVisualiser/BiomeView.cpp
+++ b/Tools/QtBiomeVisualiser/BiomeView.cpp
@@ -1,8 +1,8 @@
 #include "Globals.h"
 #include "BiomeView.h"
-#include "QtChunk.h"
 #include <QPainter>
 #include <QResizeEvent>
+#include "Region.h"
 
 
 
@@ -14,6 +14,116 @@ static const int DELTA_STEP = 120;  // The normal per-notch wheel delta
 
 
 
+/** Map for converting biome values to colors. Initialized from biomeColors[]. */
+static uchar biomeToColor[256 * 4];
+
+/** Map for converting biome values to colors. Used to initialize biomeToColor[].*/
+static struct
+{
+	EMCSBiome m_Biome;
+	uchar m_Color[3];
+} biomeColors[] =
+{
+	{ biOcean,                { 0x00, 0x00, 0x70 }, },
+	{ biPlains,               { 0x8d, 0xb3, 0x60 }, },
+	{ biDesert,               { 0xfa, 0x94, 0x18 }, },
+	{ biExtremeHills,         { 0x60, 0x60, 0x60 }, },
+	{ biForest,               { 0x05, 0x66, 0x21 }, },
+	{ biTaiga,                { 0x0b, 0x66, 0x59 }, },
+	{ biSwampland,            { 0x2f, 0xff, 0xda }, },
+	{ biRiver,                { 0x30, 0x30, 0xaf }, },
+	{ biHell,                 { 0x7f, 0x00, 0x00 }, },
+	{ biSky,                  { 0x00, 0x7f, 0xff }, },
+	{ biFrozenOcean,          { 0xa0, 0xa0, 0xdf }, },
+	{ biFrozenRiver,          { 0xa0, 0xa0, 0xff }, },
+	{ biIcePlains,            { 0xff, 0xff, 0xff }, },
+	{ biIceMountains,         { 0xa0, 0xa0, 0xa0 }, },
+	{ biMushroomIsland,       { 0xff, 0x00, 0xff }, },
+	{ biMushroomShore,        { 0xa0, 0x00, 0xff }, },
+	{ biBeach,                { 0xfa, 0xde, 0x55 }, },
+	{ biDesertHills,          { 0xd2, 0x5f, 0x12 }, },
+	{ biForestHills,          { 0x22, 0x55, 0x1c }, },
+	{ biTaigaHills,           { 0x16, 0x39, 0x33 }, },
+	{ biExtremeHillsEdge,     { 0x7f, 0x8f, 0x7f }, },
+	{ biJungle,               { 0x53, 0x7b, 0x09 }, },
+	{ biJungleHills,          { 0x2c, 0x42, 0x05 }, },
+
+	{ biJungleEdge,           { 0x62, 0x8b, 0x17 }, },
+	{ biDeepOcean,            { 0x00, 0x00, 0x30 },	},
+	{ biStoneBeach,           { 0xa2, 0xa2, 0x84 },	},
+	{ biColdBeach,            { 0xfa, 0xf0, 0xc0 },	},
+	{ biBirchForest,          { 0x30, 0x74, 0x44 },	},
+	{ biBirchForestHills,     { 0x1f, 0x5f, 0x32 },	},
+	{ biRoofedForest,         { 0x40, 0x51, 0x1a },	},
+	{ biColdTaiga,            { 0x31, 0x55, 0x4a },	},
+	{ biColdTaigaHills,       { 0x59, 0x7d, 0x72 },	},
+	{ biMegaTaiga,            { 0x59, 0x66, 0x51 },	},
+	{ biMegaTaigaHills,       { 0x59, 0x66, 0x59 },	},
+	{ biExtremeHillsPlus,     { 0x50, 0x70, 0x50 },	},
+	{ biSavanna,              { 0xbd, 0xb2, 0x5f },	},
+	{ biSavannaPlateau,       { 0xa7, 0x9d, 0x64 },	},
+	{ biMesa,                 { 0xd9, 0x45, 0x15 },	},
+	{ biMesaPlateauF,         { 0xb0, 0x97, 0x65 },	},
+	{ biMesaPlateau,          { 0xca, 0x8c, 0x65 },	},
+
+	// M variants:
+	{ biSunflowerPlains,      { 0xb5, 0xdb, 0x88 }, },
+	{ biDesertM,              { 0xff, 0xbc, 0x40 }, },
+	{ biExtremeHillsM,        { 0x88, 0x88, 0x88 }, },
+	{ biFlowerForest,         { 0x2d, 0x8e, 0x49 }, },
+	{ biTaigaM,               { 0x33, 0x8e, 0x81 }, },
+	{ biSwamplandM,           { 0x07, 0xf9, 0xb2 }, },
+	{ biIcePlainsSpikes,      { 0xb4, 0xdc, 0xdc }, },
+	{ biJungleM,              { 0x7b, 0xa3, 0x31 }, },
+	{ biJungleEdgeM,          { 0x62, 0x8b, 0x17 }, },
+	{ biBirchForestM,         { 0x58, 0x9c, 0x6c }, },
+	{ biBirchForestHillsM,    { 0x47, 0x87, 0x5a }, },
+	{ biRoofedForestM,        { 0x68, 0x79, 0x42 }, },
+	{ biColdTaigaM,           { 0x24, 0x3f, 0x36 }, },
+	{ biMegaSpruceTaiga,      { 0x45, 0x4f, 0x3e }, },
+	{ biMegaSpruceTaigaHills, { 0x45, 0x4f, 0x4e }, },
+	{ biExtremeHillsPlusM,    { 0x78, 0x98, 0x78 }, },
+	{ biSavannaM,             { 0xe5, 0xda, 0x87 }, },
+	{ biSavannaPlateauM,      { 0xa7, 0x9d, 0x74 }, },
+	{ biMesaBryce,            { 0xff, 0x6d, 0x3d }, },
+	{ biMesaPlateauFM,        { 0xd8, 0xbf, 0x8d }, },
+	{ biMesaPlateauM,         { 0xf2, 0xb4, 0x8d }, },
+} ;
+
+
+
+
+
+static class BiomeColorsInitializer
+{
+public:
+	BiomeColorsInitializer(void)
+	{
+		// Reset all colors to gray:
+		for (size_t i = 0; i < ARRAYCOUNT(biomeToColor); i++)
+		{
+			biomeToColor[i] = 0x7f;
+		}
+
+		// Set known biomes to their colors:
+		for (size_t i = 0; i < ARRAYCOUNT(biomeColors); i++)
+		{
+			uchar * color = &biomeToColor[4 * biomeColors[i].m_Biome];
+			color[0] = biomeColors[i].m_Color[2];
+			color[1] = biomeColors[i].m_Color[1];
+			color[2] = biomeColors[i].m_Color[0];
+			color[3] = 0xff;
+		}
+	}
+} biomeColorInitializer;
+
+
+
+
+
+////////////////////////////////////////////////////////////////////////////////
+// BiomeView:
+
 BiomeView::BiomeView(QWidget * parent) :
 	super(parent),
 	m_X(0),
@@ -40,7 +150,7 @@ BiomeView::BiomeView(QWidget * parent) :
 	redraw();
 
 	// Add a chunk-update callback mechanism:
-	connect(&m_Cache, SIGNAL(chunkAvailable(int, int)), this, SLOT(chunkAvailable(int, int)));
+	connect(&m_Cache, SIGNAL(regionAvailable(int, int)), this, SLOT(regionAvailable(int, int)));
 
 	// Allow mouse and keyboard interaction:
 	setFocusPolicy(Qt::StrongFocus);
@@ -143,9 +253,15 @@ void BiomeView::redraw()
 
 
 
-void BiomeView::chunkAvailable(int a_ChunkX, int a_ChunkZ)
+void BiomeView::regionAvailable(int a_RegionX, int a_RegionZ)
 {
-	drawChunk(a_ChunkX, a_ChunkZ);
+	for (int z = 0; z < 32; z++)
+	{
+		for (int x = 0; x < 32; x++)
+		{
+			drawChunk(a_RegionX * 32 + x, a_RegionZ * 32 + z);
+		}
+	}
 	update();
 }
 
@@ -175,8 +291,11 @@ void BiomeView::drawChunk(int a_ChunkX, int a_ChunkZ)
 		return;
 	}
 
-	//fetch the chunk:
-	ChunkPtr chunk = m_Cache.fetch(a_ChunkX, a_ChunkZ);
+	// Fetch the region:
+	int regionX;
+	int regionZ;
+	Region::chunkToRegion(a_ChunkX, a_ChunkZ, regionX, regionZ);
+	RegionPtr region = m_Cache.fetch(regionX, regionZ);
 
 	// Figure out where on the screen this chunk should be drawn:
 	// first find the center chunk
@@ -194,11 +313,10 @@ void BiomeView::drawChunk(int a_ChunkX, int a_ChunkZ)
 	centerx += (a_ChunkX - centerchunkx) * chunksize;
 	centery += (a_ChunkZ - centerchunkz) * chunksize;
 
-	int srcoffset = 0;
 	uchar * bits = m_Image.bits();
 	int imgstride = m_Image.bytesPerLine();
 
-	int skipx = 0,skipy = 0;
+	int skipx = 0, skipy = 0;
 	int blockwidth = chunksize, blockheight = chunksize;
 	// now if we're off the screen we need to crop
 	if (centerx < 0)
@@ -227,29 +345,52 @@ void BiomeView::drawChunk(int a_ChunkX, int a_ChunkZ)
 	int imgoffset = centerx * 4 + centery * imgstride;
 
 	// If the chunk is valid, use its data; otherwise use the empty placeholder:
-	const uchar * src = m_EmptyChunkImage;
-	if (chunk.get() != nullptr)
+	const short * src = m_EmptyChunkBiomes;
+	if (region.get() != nullptr)
 	{
-		src = chunk->getImage();
+		int relChunkX = a_ChunkX - regionX * 32;
+		int relChunkZ = a_ChunkZ - regionZ * 32;
+		Chunk & chunk = region->getRelChunk(relChunkX, relChunkZ);
+		if (chunk.isValid())
+		{
+			src = chunk.getBiomes();
+		}
 	}
 
-	// Blit or scale-blit the image:
+	// Scale-blit the image:
 	for (int z = skipy; z < blockheight; z++, imgoffset += imgstride)
 	{
-		srcoffset = floor((double)z / m_Zoom) * 16 * 4;
-		if (m_Zoom == 1.0)
-		{
-			memcpy(bits + imgoffset, src + srcoffset + skipx * 4, (blockwidth - skipx) * 4);
-		}
-		else
+		size_t srcoffset = static_cast<size_t>(std::floor((double)z / m_Zoom)) * 16;
+		int imgxoffset = imgoffset;
+		for (int x = skipx; x < blockwidth; x++)
 		{
-			int xofs = 0;
-			for (int x = skipx; x < blockwidth; x++, xofs +=4)
+			short biome = src[srcoffset + static_cast<size_t>(std::floor((double)x / m_Zoom))];
+			const uchar * color;
+			if (biome < 0)
 			{
-				memcpy(bits + imgoffset + xofs, src + srcoffset + (int)floor((double)x / m_Zoom) * 4, 4);
+				static const uchar emptyBiome1[] = { 0x44, 0x44, 0x44, 0xff };
+				static const uchar emptyBiome2[] = { 0x88, 0x88, 0x88, 0xff };
+				color = ((x & 8) ^ (z & 8)) ? emptyBiome1 : emptyBiome2;
 			}
-		}
-	}
+			else
+			{
+				if (biome * 4 >= ARRAYCOUNT(biomeToColor))
+				{
+					static const uchar errorImage[] = { 0xff, 0x00, 0x00, 0xff };
+					color = errorImage;
+				}
+				else
+				{
+					color = biomeToColor + biome * 4;
+				}
+			}
+			bits[imgxoffset]     = color[0];
+			bits[imgxoffset + 1] = color[1];
+			bits[imgxoffset + 2] = color[2];
+			bits[imgxoffset + 3] = color[3];
+			imgxoffset += 4;
+		}  // for x
+	}  // for z
 }
 
 
@@ -317,11 +458,12 @@ void BiomeView::mouseMoveEvent(QMouseEvent * a_Event)
 	// Update the status bar info text:
 	int blockX = floor((a_Event->x() - width()  / 2) / m_Zoom + m_X);
 	int blockZ = floor((a_Event->y() - height() / 2) / m_Zoom + m_Z);
-	int chunkX, chunkZ;
-	int relX = blockX, relY, relZ = blockZ;
-	cChunkDef::AbsoluteToRelative(relX, relY, relZ, chunkX, chunkZ);
-	auto chunk = m_Cache.fetch(chunkX, chunkZ);
-	int biome = (chunk.get() != nullptr) ? chunk->getBiome(relX, relZ) : biInvalidBiome;
+	int regionX, regionZ;
+	Region::blockToRegion(blockX, blockZ, regionX, regionZ);
+	int relX = blockX - regionX * 512;
+	int relZ = blockZ - regionZ * 512;
+	auto region = m_Cache.fetch(regionX, regionZ);
+	int biome = (region.get() != nullptr) ? region->getRelBiome(relX, relZ) : biInvalidBiome;
 	emit hoverChanged(blockX, blockZ, biome);
 }
 
diff --git a/Tools/QtBiomeVisualiser/BiomeView.h b/Tools/QtBiomeVisualiser/BiomeView.h
index 40d8b96ae..cd9c7ead9 100644
--- a/Tools/QtBiomeVisualiser/BiomeView.h
+++ b/Tools/QtBiomeVisualiser/BiomeView.h
@@ -2,7 +2,7 @@
 
 #include <QWidget>
 #include <memory>
-#include "ChunkCache.h"
+#include "RegionCache.h"
 #include "ChunkSource.h"
 
 
@@ -51,8 +51,8 @@ public slots:
 	/** Redraw the entire widget area. */
 	void redraw();
 
-	/** A specified chunk has become available, redraw it. */
-	void chunkAvailable(int a_ChunkX, int a_ChunkZ);
+	/** A specified region has become available, redraw it. */
+	void regionAvailable(int a_RegionX, int a_RegionZ);
 
 	/** Reloads the current chunk source and redraws the entire workspace. */
 	void reload();
@@ -62,7 +62,7 @@ protected:
 	double m_Zoom;
 
 	/** Cache for the loaded chunk data. */
-	ChunkCache m_Cache;
+	RegionCache m_Cache;
 
 	/** The entire view's contents in an offscreen image. */
 	QImage m_Image;
@@ -79,6 +79,9 @@ protected:
 	/** Data used for rendering a chunk that hasn't been loaded yet */
 	uchar m_EmptyChunkImage[16 * 16 * 4];
 
+	/** Data placeholder for chunks that aren't valid. */
+	short m_EmptyChunkBiomes[16 * 16];
+
 
 	/** Draws the specified chunk into m_Image */
 	void drawChunk(int a_ChunkX, int a_ChunkZ);
diff --git a/Tools/QtBiomeVisualiser/ChunkCache.cpp b/Tools/QtBiomeVisualiser/ChunkCache.cpp
deleted file mode 100644
index 05c267d30..000000000
--- a/Tools/QtBiomeVisualiser/ChunkCache.cpp
+++ /dev/null
@@ -1,126 +0,0 @@
-#include "Globals.h"
-#include "ChunkCache.h"
-#include <QMutexLocker>
-#include <QThreadPool>
-#include "ChunkSource.h"
-#include "ChunkLoader.h"
-
-
-
-
-
-ChunkCache::ChunkCache(QObject * parent) :
-	super(parent)
-{
-	m_Cache.setMaxCost(1024 * 1024 * 1024);  // 1 GiB of memory for the cache
-}
-
-
-
-
-
-ChunkPtr ChunkCache::fetch(int a_ChunkX, int a_ChunkZ)
-{
-	// Retrieve from the cache:
-	quint32 hash = getChunkHash(a_ChunkX, a_ChunkZ);
-	ChunkPtr * res;
-	{
-		QMutexLocker lock(&m_Mtx);
-		res = m_Cache[hash];
-		// If succesful and chunk loaded, return the retrieved value:
-		if ((res != nullptr) && (*res)->isValid())
-		{
-			return *res;
-		}
-	}
-
-	// If the chunk is in cache but not valid, it means it has been already queued for rendering, do nothing now:
-	if (res != nullptr)
-	{
-		return ChunkPtr(nullptr);
-	}
-
-	// There's no such item in the cache, create it now:
-	res = new ChunkPtr(new Chunk);
-	if (res == nullptr)
-	{
-		return ChunkPtr(nullptr);
-	}
-	{
-		QMutexLocker lock(&m_Mtx);
-		m_Cache.insert(hash, res, sizeof(Chunk));
-	}
-
-	// Queue the chunk for rendering:
-	queueChunkRender(a_ChunkX, a_ChunkZ, *res);
-
-	// Return failure, the chunk is not yet rendered:
-	return ChunkPtr(nullptr);
-}
-
-
-
-
-
-void ChunkCache::setChunkSource(std::shared_ptr<ChunkSource> a_ChunkSource)
-{
-	// Replace the chunk source:
-	m_ChunkSource = a_ChunkSource;
-
-	// Clear the cache:
-	QMutexLocker lock(&m_Mtx);
-	m_Cache.clear();
-}
-
-
-
-
-
-void ChunkCache::reload()
-{
-	assert(m_ChunkSource.get() != nullptr);
-
-	// Reload the chunk source:
-	m_ChunkSource->reload();
-
-	// Clear the cache:
-	QMutexLocker lock(&m_Mtx);
-	m_Cache.clear();
-}
-
-
-
-
-
-void ChunkCache::gotChunk(int a_ChunkX, int a_ChunkZ)
-{
-	emit chunkAvailable(a_ChunkX, a_ChunkZ);
-}
-
-
-
-
-
-quint32 ChunkCache::getChunkHash(int a_ChunkX, int a_ChunkZ)
-{
-	// Simply join the two coords into a single int
-	// The coords will never be larger than 16-bits, so we can do this safely
-	return (((static_cast<quint32>(a_ChunkX) & 0xffff) << 16) | (static_cast<quint32>(a_ChunkZ) & 0xffff));
-}
-
-
-
-
-
-void ChunkCache::queueChunkRender(int a_ChunkX, int a_ChunkZ, ChunkPtr & a_Chunk)
-{
-	// Create a new loader task:
-	ChunkLoader * loader = new ChunkLoader(a_ChunkX, a_ChunkZ, a_Chunk, m_ChunkSource);
-	connect(loader, SIGNAL(loaded(int, int)), this, SLOT(gotChunk(int, int)));
-
-	QThreadPool::globalInstance()->start(loader);
-}
-
-
-
-
diff --git a/Tools/QtBiomeVisualiser/ChunkLoader.cpp b/Tools/QtBiomeVisualiser/ChunkLoader.cpp
deleted file mode 100644
index 3d0123b23..000000000
--- a/Tools/QtBiomeVisualiser/ChunkLoader.cpp
+++ /dev/null
@@ -1,29 +0,0 @@
-#include "Globals.h"
-#include "ChunkLoader.h"
-#include "ChunkSource.h"
-
-
-
-
-
-ChunkLoader::ChunkLoader(int a_ChunkX, int a_ChunkZ, ChunkPtr a_Chunk, ChunkSourcePtr a_ChunkSource) :
-	m_ChunkX(a_ChunkX),
-	m_ChunkZ(a_ChunkZ),
-	m_Chunk(a_Chunk),
-	m_ChunkSource(a_ChunkSource)
-{
-}
-
-
-
-
-
-void ChunkLoader::run()
-{
-	m_ChunkSource->getChunkBiomes(m_ChunkX, m_ChunkZ, m_Chunk);
-	emit loaded(m_ChunkX, m_ChunkZ);
-}
-
-
-
-
diff --git a/Tools/QtBiomeVisualiser/ChunkLoader.h b/Tools/QtBiomeVisualiser/ChunkLoader.h
deleted file mode 100644
index 4d026a45e..000000000
--- a/Tools/QtBiomeVisualiser/ChunkLoader.h
+++ /dev/null
@@ -1,45 +0,0 @@
-#pragma once
-
-#include <QObject>
-#include <QRunnable>
-#include <memory>
-
-
-
-
-// fwd:
-class Chunk;
-typedef std::shared_ptr<Chunk> ChunkPtr;
-
-class ChunkSource;
-typedef std::shared_ptr<ChunkSource> ChunkSourcePtr;
-
-
-
-
-
-class ChunkLoader :
-	public QObject,
-	public QRunnable
-{
-	Q_OBJECT
-
-public:
-	ChunkLoader(int a_ChunkX, int a_ChunkZ, ChunkPtr a_Chunk, ChunkSourcePtr a_ChunkSource);
-	virtual ~ChunkLoader() {}
-
-signals:
-	void loaded(int a_ChunkX, int a_ChunkZ);
-
-protected:
-	virtual void run() override;
-
-private:
-	int m_ChunkX, m_ChunkZ;
-	ChunkPtr m_Chunk;
-	ChunkSourcePtr m_ChunkSource;
-};
-
-
-
-
diff --git a/Tools/QtBiomeVisualiser/ChunkSource.cpp b/Tools/QtBiomeVisualiser/ChunkSource.cpp
index c5cde1c3b..ea3346f04 100644
--- a/Tools/QtBiomeVisualiser/ChunkSource.cpp
+++ b/Tools/QtBiomeVisualiser/ChunkSource.cpp
@@ -24,26 +24,69 @@ BioGenSource::BioGenSource(cIniFilePtr a_IniFile) :
 
 
 
-void BioGenSource::getChunkBiomes(int a_ChunkX, int a_ChunkZ, ChunkPtr a_DestChunk)
+void BioGenSource::getChunkBiomes(int a_ChunkX, int a_ChunkZ, Chunk & a_DestChunk)
 {
 	cChunkDef::BiomeMap biomes;
+	int tag;
+	cBiomeGenPtr biomeGen = getBiomeGen(tag);
+	biomeGen->GenBiomes(a_ChunkX, a_ChunkZ, biomes);
+	releaseBiomeGen(std::move(biomeGen), tag);
+	a_DestChunk.setBiomes(biomes);
+}
+
+
+
+
+
+void BioGenSource::reload()
+{
+	QMutexLocker lock(&m_Mtx);
+	m_CurrentTag += 1;
+	m_BiomeGens.clear();
+}
+
+
+
+
+
+cBiomeGenPtr BioGenSource::getBiomeGen(int & a_Tag)
+{
+	QMutexLocker lock(&m_Mtx);
+	a_Tag = m_CurrentTag;
+	if (m_BiomeGens.empty())
+	{
+		// Create a new biogen:
+		lock.unlock();
+		int seed = m_IniFile->GetValueSetI("Seed", "Seed", 0);
+		bool unused;
+		cBiomeGenPtr res = cBiomeGen::CreateBiomeGen(*m_IniFile, seed, unused);
+		return res;
+	}
+	else
 	{
-		QMutexLocker lock(&m_Mtx);
-		m_BiomeGen->GenBiomes(a_ChunkX, a_ChunkZ, biomes);
+		// Return an existing biogen:
+		cBiomeGenPtr res = m_BiomeGens.back();
+		m_BiomeGens.pop_back();
+		return res;
 	}
-	a_DestChunk->setBiomes(biomes);
 }
 
 
 
 
 
-void BioGenSource::reload()
+void BioGenSource::releaseBiomeGen(cBiomeGenPtr && a_BiomeGen, int a_Tag)
 {
-	int seed = m_IniFile->GetValueSetI("Seed", "Seed", 0);
-	bool unused = false;
 	QMutexLocker lock(&m_Mtx);
-	m_BiomeGen = cBiomeGen::CreateBiomeGen(*m_IniFile, seed, unused);
+
+	// If the tag differs, the source has been reloaded and this biogen is old, dispose:
+	if (a_Tag != m_CurrentTag)
+	{
+		return;
+	}
+
+	// The tag is the same, put the biogen back to list:
+	m_BiomeGens.push_back(std::move(a_BiomeGen));
 }
 
 
@@ -160,7 +203,7 @@ AnvilSource::AnvilSource(QString a_WorldRegionFolder) :
 
 
 
-void AnvilSource::getChunkBiomes(int a_ChunkX, int a_ChunkZ, ChunkPtr a_DestChunk)
+void AnvilSource::getChunkBiomes(int a_ChunkX, int a_ChunkZ, Chunk & a_DestChunk)
 {
 	// Load the compressed data:
 	AString compressedChunkData = getCompressedChunkData(a_ChunkX, a_ChunkZ);
@@ -200,7 +243,7 @@ void AnvilSource::getChunkBiomes(int a_ChunkX, int a_ChunkZ, ChunkPtr a_DestChun
 		{
 			biomeMap[i] = (EMCSBiome)GetBEInt(beBiomes + 4 * i);
 		}
-		a_DestChunk->setBiomes(biomeMap);
+		a_DestChunk.setBiomes(biomeMap);
 		return;
 	}
 
@@ -216,7 +259,7 @@ void AnvilSource::getChunkBiomes(int a_ChunkX, int a_ChunkZ, ChunkPtr a_DestChun
 	{
 		biomeMap[i] = EMCSBiome(vanillaBiomes[i]);
 	}
-	a_DestChunk->setBiomes(biomeMap);
+	a_DestChunk.setBiomes(biomeMap);
 }
 
 
@@ -260,7 +303,7 @@ AnvilSource::AnvilFilePtr AnvilSource::getAnvilFile(int a_ChunkX, int a_ChunkZ)
 
 	// Search the cache for the file:
 	QMutexLocker lock(&m_Mtx);
-	for (auto itr = m_Files.cbegin(), end = m_Files.cend(); itr != end; ++itr)
+	for (auto itr = m_Files.begin(), end = m_Files.end(); itr != end; ++itr)
 	{
 		if (((*itr)->m_RegionX == RegionX) && ((*itr)->m_RegionZ == RegionZ))
 		{
diff --git a/Tools/QtBiomeVisualiser/ChunkSource.h b/Tools/QtBiomeVisualiser/ChunkSource.h
index 5332c5d3f..62f9b5626 100644
--- a/Tools/QtBiomeVisualiser/ChunkSource.h
+++ b/Tools/QtBiomeVisualiser/ChunkSource.h
@@ -10,7 +10,7 @@
 
 // fwd:
 class cBiomeGen;
-typedef std::shared_ptr<cBiomeGen> cBiomeGenPtr;
+typedef SharedPtr<cBiomeGen> cBiomeGenPtr;
 class cIniFile;
 typedef std::shared_ptr<cIniFile> cIniFilePtr;
 
@@ -26,7 +26,7 @@ public:
 
 	/** Fills the a_DestChunk with the biomes for the specified coords.
 	It is expected to be thread-safe and re-entrant. Usually QThread::idealThreadCount() threads are used. */
-	virtual void getChunkBiomes(int a_ChunkX, int a_ChunkZ, ChunkPtr a_DestChunk) = 0;
+	virtual void getChunkBiomes(int a_ChunkX, int a_ChunkZ, Chunk & a_DestChunk) = 0;
 
 	/** Forces a fresh reload of the source. Useful mainly for the generator, whose underlying definition file may have been changed. */
 	virtual void reload() = 0;
@@ -45,7 +45,7 @@ public:
 	BioGenSource(cIniFilePtr a_IniFile);
 
 	// ChunkSource overrides:
-	virtual void getChunkBiomes(int a_ChunkX, int a_ChunkZ, ChunkPtr a_DestChunk) override;
+	virtual void getChunkBiomes(int a_ChunkX, int a_ChunkZ, Chunk & a_DestChunk) override;
 	virtual void reload(void) override;
 
 protected:
@@ -53,10 +53,30 @@ protected:
 	cIniFilePtr m_IniFile;
 
 	/** The generator used for generating biomes. */
-	cBiomeGenPtr m_BiomeGen;
+	std::vector<cBiomeGenPtr> m_BiomeGens;
 
-	/** Guards m_BiomeGen against multithreaded access. */
+	/** Guards m_BiomeGens against multithreaded access. */
 	QMutex m_Mtx;
+
+	/** Keeps track of the current settings of the biomegens.
+	Incremented by one each time reload() is called. Provides the means of releasing old biomegens that were
+	in use while reload() was being processed and thus couldn't be changed back then. releaseBiomeGen() does
+	the job of filtering the biogens before reusing them. */
+	int m_CurrentTag;
+
+
+	/** Retrieves one cBiomeGenPtr from m_BiomeGens.
+	If there's no biogen available there, creates a new one based on the ini file.
+	When done with it, the caller should call releaseBiomeGen() to put the biogen back to m_BiomeGens.
+	a_Tag receives the value of m_CurrentTag from when the lock was held; it should be passed to
+	releaseBiomeGen() together with the biogen. */
+	cBiomeGenPtr getBiomeGen(int & a_Tag);
+
+	/** Marks the specified biogen as available for reuse (puts it back into m_BiomeGens).
+	a_Tag is the value of m_CurrentTag from the time when the biogen was retrieved; if it is different from
+	current m_CurrentTagValue, the biogen will be disposed of (because reload() has been called in the
+	meantime). */
+	void releaseBiomeGen(cBiomeGenPtr && a_BiomeGen, int a_Tag);
 };
 
 
@@ -70,7 +90,7 @@ public:
 	AnvilSource(QString a_WorldRegionFolder);
 
 	// ChunkSource overrides:
-	virtual void getChunkBiomes(int a_ChunkX, int a_ChunkZ, ChunkPtr a_DestChunk) override;
+	virtual void getChunkBiomes(int a_ChunkX, int a_ChunkZ, Chunk & a_DestChunk) override;
 	virtual void reload() override;
 
 protected:
diff --git a/Tools/QtBiomeVisualiser/GeneratorSetup.cpp b/Tools/QtBiomeVisualiser/GeneratorSetup.cpp
index a6490d9fe..8f97e1f37 100644
--- a/Tools/QtBiomeVisualiser/GeneratorSetup.cpp
+++ b/Tools/QtBiomeVisualiser/GeneratorSetup.cpp
@@ -14,6 +14,8 @@ static const QString s_GeneratorNames[] =
 	QString("Checkerboard"),
 	QString("Constant"),
 	QString("DistortedVoronoi"),
+	QString("Grown"),
+	QString("GrownProt"),
 	QString("MultiStepMap"),
 	QString("TwoLevel"),
 	QString("Voronoi"),
diff --git a/Tools/QtBiomeVisualiser/MainWindow.cpp b/Tools/QtBiomeVisualiser/MainWindow.cpp
index 7853d768e..c6ea8656e 100644
--- a/Tools/QtBiomeVisualiser/MainWindow.cpp
+++ b/Tools/QtBiomeVisualiser/MainWindow.cpp
@@ -8,12 +8,13 @@
 #include <QSettings>
 #include <QDirIterator>
 #include <QStatusBar>
-#include "src/IniFile.h"
 #include "ChunkSource.h"
+#include "src/IniFile.h"
 #include "src/Generating/BioGen.h"
 #include "src/StringCompression.h"
 #include "src/WorldStorage/FastNBT.h"
 #include "GeneratorSetup.h"
+#include "RegionLoader.h"
 
 
 
@@ -31,7 +32,8 @@ const double MainWindow::m_ViewZooms[] =
 MainWindow::MainWindow(QWidget * parent) :
 	QMainWindow(parent),
 	m_GeneratorSetup(nullptr),
-	m_LineSeparator(nullptr)
+	m_LineSeparator(nullptr),
+	m_CurrentZoomLevel(2)
 {
 	initMinecraftPath();
 
@@ -40,6 +42,7 @@ MainWindow::MainWindow(QWidget * parent) :
 	connect(m_BiomeView, SIGNAL(decreaseZoom()), this, SLOT(decreaseZoom()));
 	connect(m_BiomeView, SIGNAL(wheelUp()),      this, SLOT(increaseZoom()));
 	connect(m_BiomeView, SIGNAL(wheelDown()),    this, SLOT(decreaseZoom()));
+	m_BiomeView->setZoomLevel(m_ViewZooms[m_CurrentZoomLevel]);
 
 	m_StatusBar = new QStatusBar();
 	this->setStatusBar(m_StatusBar);
@@ -70,7 +73,7 @@ MainWindow::MainWindow(QWidget * parent) :
 
 MainWindow::~MainWindow()
 {
-
+	RegionLoader::shutdown();
 }
 
 
@@ -172,7 +175,8 @@ void MainWindow::setViewZoom()
 	{
 		return;
 	}
-	double newZoom = m_ViewZooms[action->data().toInt()];
+	m_CurrentZoomLevel = action->data().toInt();
+	double newZoom = m_ViewZooms[m_CurrentZoomLevel];
 	m_BiomeView->setZoomLevel(newZoom);
 	action->setChecked(true);
 }
@@ -284,15 +288,11 @@ void MainWindow::createActions()
 	{
 		m_actViewZoom[i] = new QAction(tr("&Zoom %1%").arg(std::floor(m_ViewZooms[i] * 100)), this);
 		m_actViewZoom[i]->setCheckable(true);
-		if ((int)(m_ViewZooms[i] * 16) == 16)
-		{
-			m_actViewZoom[i]->setChecked(true);
-			m_CurrentZoomLevel = i;
-		}
 		m_actViewZoom[i]->setData(QVariant(i));
 		zoomGroup->addAction(m_actViewZoom[i]);
 		connect(m_actViewZoom[i], SIGNAL(triggered()), this, SLOT(setViewZoom()));
 	}
+	m_actViewZoom[m_CurrentZoomLevel]->setChecked(true);
 }
 
 
diff --git a/Tools/QtBiomeVisualiser/QtBiomeVisualiser.pro b/Tools/QtBiomeVisualiser/QtBiomeVisualiser.pro
index f3a5255fb..cccee1305 100644
--- a/Tools/QtBiomeVisualiser/QtBiomeVisualiser.pro
+++ b/Tools/QtBiomeVisualiser/QtBiomeVisualiser.pro
@@ -12,76 +12,90 @@ TARGET = QtBiomeVisualiser
 TEMPLATE = app
 
 
-SOURCES +=\
-		MainWindow.cpp \
-    BiomeView.cpp \
-    ../../src/Generating/BioGen.cpp \
-    ../../src/VoronoiMap.cpp \
-    ../../src/Noise.cpp \
-    ../../src/StringUtils.cpp \
-    ../../src/LoggerListeners.cpp \
-    ../../src/Logger.cpp \
-		../../src/IniFile.cpp \
-    ../../src/OSSupport/File.cpp \
-    ../../src/OSSupport/CriticalSection.cpp \
-    ../../src/OSSupport/IsThread.cpp \
-    ../../src/BiomeDef.cpp \
-    ChunkCache.cpp \
-    ChunkSource.cpp \
-    ChunkLoader.cpp \
-    ../../src/StringCompression.cpp \
-    ../../src/WorldStorage/FastNBT.cpp \
-    ../../lib/zlib/adler32.c \
-    ../../lib/zlib/compress.c \
-    ../../lib/zlib/crc32.c \
-    ../../lib/zlib/deflate.c \
-    ../../lib/zlib/gzclose.c \
-    ../../lib/zlib/gzlib.c \
-    ../../lib/zlib/gzread.c \
-    ../../lib/zlib/gzwrite.c \
-    ../../lib/zlib/infback.c \
-    ../../lib/zlib/inffast.c \
-    ../../lib/zlib/inflate.c \
-    ../../lib/zlib/inftrees.c \
-    ../../lib/zlib/trees.c \
-    ../../lib/zlib/uncompr.c \
-    ../../lib/zlib/zutil.c \
-    GeneratorSetup.cpp \
-    QtBiomeVisualiser.cpp \
-    QtChunk.cpp
-
-HEADERS  += MainWindow.h \
-		Globals.h \
-		BiomeView.h \
-    ../../src/Generating/BioGen.h \
-    ../../src/VoronoiMap.h \
-    ../../src/Noise.h \
-    ../../src/StringUtils.h \
-    ../../src/LoggerListeners.h \
-    ../../src/Logger.h \
-		../../src/IniFile.h \
-    ../../src/OSSupport/File.h \
-    ../../src/OSSupport/CriticalSection.h \
-    ../../src/OSSupport/IsThread.h \
-    ../../src/BiomeDef.h \
-    ChunkCache.h \
-    ChunkSource.h \
-    ChunkLoader.h \
-    ../../src/StringCompression.h \
-    ../../src/WorldStorage/FastNBT.h \
-    ../../lib/zlib/crc32.h \
-    ../../lib/zlib/deflate.h \
-    ../../lib/zlib/gzguts.h \
-    ../../lib/zlib/inffast.h \
-    ../../lib/zlib/inffixed.h \
-    ../../lib/zlib/inflate.h \
-    ../../lib/zlib/inftrees.h \
-    ../../lib/zlib/trees.h \
-    ../../lib/zlib/zconf.h \
-    ../../lib/zlib/zlib.h \
-    ../../lib/zlib/zutil.h \
-    GeneratorSetup.h \
-    QtChunk.h
+SOURCES += \
+	MainWindow.cpp \
+	BiomeView.cpp \
+	../../src/Generating/BioGen.cpp \
+	../../src/VoronoiMap.cpp \
+	../../src/Noise/Noise.cpp \
+	../../src/StringUtils.cpp \
+	../../src/LoggerListeners.cpp \
+	../../src/Logger.cpp \
+	../../src/IniFile.cpp \
+	../../src/OSSupport/File.cpp \
+	../../src/OSSupport/CriticalSection.cpp \
+	../../src/OSSupport/IsThread.cpp \
+	../../src/OSSupport/StackTrace.cpp \
+	../../src/BiomeDef.cpp \
+	../../src/StackWalker.cpp \
+	../../src/StringCompression.cpp \
+	../../src/WorldStorage/FastNBT.cpp \
+	../../lib/zlib/adler32.c \
+	../../lib/zlib/compress.c \
+	../../lib/zlib/crc32.c \
+	../../lib/zlib/deflate.c \
+	../../lib/zlib/gzclose.c \
+	../../lib/zlib/gzlib.c \
+	../../lib/zlib/gzread.c \
+	../../lib/zlib/gzwrite.c \
+	../../lib/zlib/infback.c \
+	../../lib/zlib/inffast.c \
+	../../lib/zlib/inflate.c \
+	../../lib/zlib/inftrees.c \
+	../../lib/zlib/trees.c \
+	../../lib/zlib/uncompr.c \
+	../../lib/zlib/zutil.c \
+	GeneratorSetup.cpp \
+	QtBiomeVisualiser.cpp \
+	QtChunk.cpp \
+	RegionCache.cpp \
+	Region.cpp \
+	ChunkSource.cpp \
+	RegionLoader.cpp
+
+
+
+HEADERS += \
+	MainWindow.h \
+	QtChunk.h \
+	Globals.h \
+	BiomeView.h \
+	../../src/Generating/BioGen.h \
+	../../src/Generating/IntGen.h \
+	../../src/Generating/ProtIntGen.h \
+	../../src/VoronoiMap.h \
+	../../src/Noise/Noise.h \
+	../../src/StringUtils.h \
+	../../src/LoggerListeners.h \
+	../../src/Logger.h \
+	../../src/IniFile.h \
+	../../src/OSSupport/File.h \
+	../../src/OSSupport/CriticalSection.h \
+	../../src/OSSupport/IsThread.h \
+	../../src/OSSupport/StackTrace.h \
+	../../src/BiomeDef.h \
+	../../src/StackWalker.h \
+	../../src/StringCompression.h \
+	../../src/WorldStorage/FastNBT.h \
+	../../lib/zlib/crc32.h \
+	../../lib/zlib/deflate.h \
+	../../lib/zlib/gzguts.h \
+	../../lib/zlib/inffast.h \
+	../../lib/zlib/inffixed.h \
+	../../lib/zlib/inflate.h \
+	../../lib/zlib/inftrees.h \
+	../../lib/zlib/trees.h \
+	../../lib/zlib/zconf.h \
+	../../lib/zlib/zlib.h \
+	../../lib/zlib/zutil.h \
+	GeneratorSetup.h \
+	QtChunk.h \
+	RegionCache.h \
+	Region.h \
+	ChunkSource.h \
+	RegionLoader.h
+
+
 
 INCLUDEPATH += $$_PRO_FILE_PWD_ \
 	$$_PRO_FILE_PWD_/../../lib \
@@ -97,4 +111,15 @@ CONFIG += C++11
 
 OTHER_FILES +=
 
+win* {
+	# Add the advapi32 library for windows compiles; needed for the StackWalker:
+	LIBS += advapi32.lib
+
+	#	StackWalker doesn't like how Qt inconsistently defines only UNICODE, but not _UNICODE:
+	DEFINES -= UNICODE
+}
+
+
+
+
 
diff --git a/Tools/QtBiomeVisualiser/QtChunk.cpp b/Tools/QtBiomeVisualiser/QtChunk.cpp
index 031aa3654..f201ef220 100644
--- a/Tools/QtBiomeVisualiser/QtChunk.cpp
+++ b/Tools/QtBiomeVisualiser/QtChunk.cpp
@@ -5,138 +5,6 @@
 
 
 
-/** Map for converting biome values to colors. Initialized from biomeColors[]. */
-static uchar biomeToColor[256 * 4];
-
-/** Map for converting biome values to colors. Used to initialize biomeToColor[].*/
-static struct
-{
-	EMCSBiome m_Biome;
-	uchar m_Color[3];
-} biomeColors[] =
-{
-	{ biOcean,                { 0x00, 0x00, 0x70 }, },
-	{ biPlains,               { 0x8d, 0xb3, 0x60 }, },
-	{ biDesert,               { 0xfa, 0x94, 0x18 }, },
-	{ biExtremeHills,         { 0x60, 0x60, 0x60 }, },
-	{ biForest,               { 0x05, 0x66, 0x21 }, },
-	{ biTaiga,                { 0x0b, 0x66, 0x59 }, },
-	{ biSwampland,            { 0x2f, 0xff, 0xda }, },
-	{ biRiver,                { 0x30, 0x30, 0xaf }, },
-	{ biHell,                 { 0x7f, 0x00, 0x00 }, },
-	{ biSky,                  { 0x00, 0x7f, 0xff }, },
-	{ biFrozenOcean,          { 0xa0, 0xa0, 0xdf }, },
-	{ biFrozenRiver,          { 0xa0, 0xa0, 0xff }, },
-	{ biIcePlains,            { 0xff, 0xff, 0xff }, },
-	{ biIceMountains,         { 0xa0, 0xa0, 0xa0 }, },
-	{ biMushroomIsland,       { 0xff, 0x00, 0xff }, },
-	{ biMushroomShore,        { 0xa0, 0x00, 0xff }, },
-	{ biBeach,                { 0xfa, 0xde, 0x55 }, },
-	{ biDesertHills,          { 0xd2, 0x5f, 0x12 }, },
-	{ biForestHills,          { 0x22, 0x55, 0x1c }, },
-	{ biTaigaHills,           { 0x16, 0x39, 0x33 }, },
-	{ biExtremeHillsEdge,     { 0x7f, 0x8f, 0x7f }, },
-	{ biJungle,               { 0x53, 0x7b, 0x09 }, },
-	{ biJungleHills,          { 0x2c, 0x42, 0x05 }, },
-
-	{ biJungleEdge,           { 0x62, 0x8b, 0x17 }, },
-	{ biDeepOcean,            { 0x00, 0x00, 0x30 },	},
-	{ biStoneBeach,           { 0xa2, 0xa2, 0x84 },	},
-	{ biColdBeach,            { 0xfa, 0xf0, 0xc0 },	},
-	{ biBirchForest,          { 0x30, 0x74, 0x44 },	},
-	{ biBirchForestHills,     { 0x1f, 0x5f, 0x32 },	},
-	{ biRoofedForest,         { 0x40, 0x51, 0x1a },	},
-	{ biColdTaiga,            { 0x31, 0x55, 0x4a },	},
-	{ biColdTaigaHills,       { 0x59, 0x7d, 0x72 },	},
-	{ biMegaTaiga,            { 0x59, 0x66, 0x51 },	},
-	{ biMegaTaigaHills,       { 0x59, 0x66, 0x59 },	},
-	{ biExtremeHillsPlus,     { 0x50, 0x70, 0x50 },	},
-	{ biSavanna,              { 0xbd, 0xb2, 0x5f },	},
-	{ biSavannaPlateau,       { 0xa7, 0x9d, 0x64 },	},
-	{ biMesa,                 { 0xd9, 0x45, 0x15 },	},
-	{ biMesaPlateauF,         { 0xb0, 0x97, 0x65 },	},
-	{ biMesaPlateau,          { 0xca, 0x8c, 0x65 },	},
-
-	// M variants:
-	{ biSunflowerPlains,      { 0xb5, 0xdb, 0x88 }, },
-	{ biDesertM,              { 0xff, 0xbc, 0x40 }, },
-	{ biExtremeHillsM,        { 0x88, 0x88, 0x88 }, },
-	{ biFlowerForest,         { 0x2d, 0x8e, 0x49 }, },
-	{ biTaigaM,               { 0x33, 0x8e, 0x81 }, },
-	{ biSwamplandM,           { 0x07, 0xf9, 0xb2 }, },
-	{ biIcePlainsSpikes,      { 0xb4, 0xdc, 0xdc }, },
-	{ biJungleM,              { 0x7b, 0xa3, 0x31 }, },
-	{ biJungleEdgeM,          { 0x62, 0x8b, 0x17 }, },
-	{ biBirchForestM,         { 0x58, 0x9c, 0x6c }, },
-	{ biBirchForestHillsM,    { 0x47, 0x87, 0x5a }, },
-	{ biRoofedForestM,        { 0x68, 0x79, 0x42 }, },
-	{ biColdTaigaM,           { 0x24, 0x3f, 0x36 }, },
-	{ biMegaSpruceTaiga,      { 0x45, 0x4f, 0x3e }, },
-	{ biMegaSpruceTaigaHills, { 0x45, 0x4f, 0x4e }, },
-	{ biExtremeHillsPlusM,    { 0x78, 0x98, 0x78 }, },
-	{ biSavannaM,             { 0xe5, 0xda, 0x87 }, },
-	{ biSavannaPlateauM,      { 0xa7, 0x9d, 0x74 }, },
-	{ biMesaBryce,            { 0xff, 0x6d, 0x3d }, },
-	{ biMesaPlateauFM,        { 0xd8, 0xbf, 0x8d }, },
-	{ biMesaPlateauM,         { 0xf2, 0xb4, 0x8d }, },
-} ;
-
-
-
-
-
-static class BiomeColorsInitializer
-{
-public:
-	BiomeColorsInitializer(void)
-	{
-		// Reset all colors to gray:
-		for (size_t i = 0; i < ARRAYCOUNT(biomeToColor); i++)
-		{
-			biomeToColor[i] = 0x7f;
-		}
-
-		// Set known biomes to their colors:
-		for (size_t i = 0; i < ARRAYCOUNT(biomeColors); i++)
-		{
-			uchar * color = &biomeToColor[4 * biomeColors[i].m_Biome];
-			color[0] = biomeColors[i].m_Color[2];
-			color[1] = biomeColors[i].m_Color[1];
-			color[2] = biomeColors[i].m_Color[0];
-			color[3] = 0xff;
-		}
-	}
-} biomeColorInitializer;
-
-
-
-
-
-/** Converts biomes in an array into the chunk image data. */
-static void biomesToImage(const cChunkDef::BiomeMap & a_Biomes, Chunk::Image & a_Image)
-{
-	// Make sure the two arrays are of the same size, compile-time.
-	// Note that a_Image is actually 4 items per pixel, so the array is 4 times bigger:
-	static const char Check1[4 * ARRAYCOUNT(a_Biomes) - ARRAYCOUNT(a_Image)      + 1] = {};
-	static const char Check2[ARRAYCOUNT(a_Image)      - 4 * ARRAYCOUNT(a_Biomes) + 1] = {};
-
-	// Convert the biomes into color:
-	for (size_t i = 0; i < ARRAYCOUNT(a_Biomes); i++)
-	{
-		a_Image[4 * i + 0] = biomeToColor[4 * a_Biomes[i] + 0];
-		a_Image[4 * i + 1] = biomeToColor[4 * a_Biomes[i] + 1];
-		a_Image[4 * i + 2] = biomeToColor[4 * a_Biomes[i] + 2];
-		a_Image[4 * i + 3] = biomeToColor[4 * a_Biomes[i] + 3];
-	}
-}
-
-
-
-
-
-////////////////////////////////////////////////////////////////////////////////
-// Chunk:
-
 Chunk::Chunk() :
 	m_IsValid(false)
 {
@@ -146,20 +14,12 @@ Chunk::Chunk() :
 
 
 
-const uchar * Chunk::getImage(void) const
-{
-	ASSERT(m_IsValid);
-	return m_Image;
-}
-
-
-
-
-
 void Chunk::setBiomes(const cChunkDef::BiomeMap & a_Biomes)
 {
-	memcpy(m_Biomes, a_Biomes, sizeof(m_Biomes));
-	renderBiomes();
+	for (size_t idx = 0; idx < ARRAYCOUNT(a_Biomes); ++idx)
+	{
+		m_Biomes[idx] = static_cast<short>(a_Biomes[idx]);
+	}
 	m_IsValid = true;
 }
 
@@ -173,16 +33,7 @@ EMCSBiome Chunk::getBiome(int a_RelX, int a_RelZ)
 	{
 		return biInvalidBiome;
 	}
-	return cChunkDef::GetBiome(m_Biomes, a_RelX, a_RelZ);
-}
-
-
-
-
-
-void Chunk::renderBiomes()
-{
-	biomesToImage(m_Biomes, m_Image);
+	return static_cast<EMCSBiome>(m_Biomes[a_RelX + 16 * a_RelZ]);
 }
 
 
diff --git a/Tools/QtBiomeVisualiser/QtChunk.h b/Tools/QtBiomeVisualiser/QtChunk.h
index 74321577a..d806d18bb 100644
--- a/Tools/QtBiomeVisualiser/QtChunk.h
+++ b/Tools/QtBiomeVisualiser/QtChunk.h
@@ -18,9 +18,6 @@ public:
 	/** Returns true iff the chunk data is valid - loaded or generated. */
 	bool isValid(void) const { return m_IsValid; }
 
-	/** Returns the image of the chunk's biomes. Assumes that the chunk is valid. */
-	const uchar * getImage(void) const;
-
 	/** Sets the biomes to m_Biomes and renders them into m_Image. */
 	void setBiomes(const cChunkDef::BiomeMap & a_Biomes);
 
@@ -28,19 +25,16 @@ public:
 	Coords must be valid inside this chunk. */
 	EMCSBiome getBiome(int a_RelX, int a_RelZ);
 
+	/** Returns the raw biome data for this chunk. */
+	const short * getBiomes(void) const { return m_Biomes; }
+
 protected:
 	/** Flag that specifies if the chunk data is valid - loaded or generated. */
 	bool m_IsValid;
 
-	/** Cached rendered image of this chunk's biomes. Updated in render(). */
-	Image m_Image;
-
-	/** Biomes comprising the chunk, in the X + 16 * Z ordering. */
-	cChunkDef::BiomeMap m_Biomes;
-
-
-	/** Renders biomes from m_Biomes into m_Image. */
-	void renderBiomes();
+	/** Biomes comprising the chunk, in the X + 16 * Z ordering.
+	Typed as short to save on memory, converted automatically when needed. */
+	short m_Biomes[16 * 16];
 };
 
 typedef std::shared_ptr<Chunk> ChunkPtr;
diff --git a/Tools/QtBiomeVisualiser/Region.cpp b/Tools/QtBiomeVisualiser/Region.cpp
new file mode 100644
index 000000000..d8a0a2f76
--- /dev/null
+++ b/Tools/QtBiomeVisualiser/Region.cpp
@@ -0,0 +1,72 @@
+
+#include "Globals.h"
+#include "Region.h"
+
+
+
+
+
+Region::Region()
+{
+}
+
+
+
+
+
+Chunk & Region::getRelChunk(int a_RelChunkX, int a_RelChunkZ)
+{
+		ASSERT(a_RelChunkX >= 0);
+		ASSERT(a_RelChunkZ >= 0);
+		ASSERT(a_RelChunkX < 32);
+		ASSERT(a_RelChunkZ < 32);
+
+		return m_Chunks[a_RelChunkX + a_RelChunkZ * 32];
+}
+
+
+
+
+
+int Region::getRelBiome(int a_RelBlockX, int a_RelBlockZ)
+{
+	ASSERT(a_RelBlockX >= 0);
+	ASSERT(a_RelBlockZ >= 0);
+	ASSERT(a_RelBlockX < 512);
+	ASSERT(a_RelBlockZ < 512);
+
+	int chunkX = a_RelBlockX / 16;
+	int chunkZ = a_RelBlockZ / 16;
+	Chunk & chunk = m_Chunks[chunkX + 32 * chunkZ];
+	if (chunk.isValid())
+	{
+		return chunk.getBiome(a_RelBlockX - 16 * chunkX, a_RelBlockZ - 16 * chunkZ);
+	}
+	else
+	{
+		return biInvalidBiome;
+	}
+}
+
+
+
+
+void Region::blockToRegion(int a_BlockX, int a_BlockZ, int & a_RegionX, int & a_RegionZ)
+{
+	a_RegionX = static_cast<int>(std::floor(static_cast<float>(a_BlockX) / 512));
+	a_RegionZ = static_cast<int>(std::floor(static_cast<float>(a_BlockZ) / 512));
+}
+
+
+
+
+
+void Region::chunkToRegion(int a_ChunkX, int a_ChunkZ, int & a_RegionX, int & a_RegionZ)
+{
+	a_RegionX = static_cast<int>(std::floor(static_cast<float>(a_ChunkX) / 32));
+	a_RegionZ = static_cast<int>(std::floor(static_cast<float>(a_ChunkZ) / 32));
+}
+
+
+
+
diff --git a/Tools/QtBiomeVisualiser/Region.h b/Tools/QtBiomeVisualiser/Region.h
new file mode 100644
index 000000000..863c0ac02
--- /dev/null
+++ b/Tools/QtBiomeVisualiser/Region.h
@@ -0,0 +1,46 @@
+#pragma once
+
+#include "QtChunk.h"
+
+
+
+
+
+class Region
+{
+public:
+	Region();
+
+	/** Retrieves the chunk with the specified relative coords. */
+	Chunk & getRelChunk(int a_RelChunkX, int a_RelChunkZ);
+
+	/** Returns true iff the chunk data for all chunks has been loaded.
+	This doesn't mean that all the chunks are valid, only that the entire region has been processed and should
+	be displayed. */
+	bool isValid(void) const { return m_IsValid; }
+
+	/** Returns the biome in the block coords relative to this region.
+	Returns biInvalidBiome if the underlying chunk is not valid. */
+	int getRelBiome(int a_RelBlockX, int a_RelBlockZ);
+
+	/** Converts block coordinates into region coordinates. */
+	static void blockToRegion(int a_BlockX, int a_BlockZ, int & a_RegionX, int & a_RegionZ);
+
+	/** Converts chunk coordinates into region coordinates. */
+	static void chunkToRegion(int a_ChunkX, int a_ChunkZ, int & a_RegionX, int & a_RegionZ);
+
+protected:
+	friend class RegionLoader;
+
+
+	Chunk m_Chunks[32 * 32];
+
+	/** True iff the data for all the chunks has been loaded.
+	This doesn't mean that all the chunks are valid, only that the entire region has been processed and should
+	be displayed. */
+	bool m_IsValid;
+};
+
+
+
+
diff --git a/Tools/QtBiomeVisualiser/RegionCache.cpp b/Tools/QtBiomeVisualiser/RegionCache.cpp
new file mode 100644
index 000000000..e46fd222a
--- /dev/null
+++ b/Tools/QtBiomeVisualiser/RegionCache.cpp
@@ -0,0 +1,138 @@
+#include "Globals.h"
+#include "RegionCache.h"
+#include <QMutexLocker>
+#include <QThreadPool>
+#include "ChunkSource.h"
+#include "RegionLoader.h"
+#include "Region.h"
+
+
+
+
+
+RegionCache::RegionCache(QObject * parent) :
+	super(parent)
+{
+	m_Cache.setMaxCost(1024 * 1024 * 1024);  // 1 GiB of memory for the cache
+}
+
+
+
+
+
+RegionPtr RegionCache::fetch(int a_RegionX, int a_RegionZ)
+{
+	// Retrieve from the cache:
+	quint32 hash = getRegionHash(a_RegionX, a_RegionZ);
+	RegionPtr * res;
+	{
+		QMutexLocker lock(&m_Mtx);
+		res = m_Cache[hash];
+		// If succesful and region loaded, return the retrieved value:
+		if ((res != nullptr) && (*res)->isValid())
+		{
+			return *res;
+		}
+	}
+
+	// If the region is in cache but not valid, it means it has been already queued for rendering, do nothing now:
+	if (res != nullptr)
+	{
+		return RegionPtr(nullptr);
+	}
+
+	// There's no such item in the cache, create it now:
+	try
+	{
+		res = new RegionPtr(new Region);
+	}
+	catch (const std::bad_alloc &)
+	{
+		/* Allocation failed (32-bit process hit the 2 GiB barrier?)
+		This may happen even with the cache set to 1 GiB, because it contains shared ptrs and so they may be
+		held by another place in the code even when they are removed from cache.
+		*/
+		return RegionPtr(nullptr);
+	}
+	if (res == nullptr)
+	{
+		return RegionPtr(nullptr);
+	}
+	{
+		QMutexLocker lock(&m_Mtx);
+		m_Cache.insert(hash, res, sizeof(Region));
+	}
+
+	// Queue the region for rendering:
+	queueRegionRender(a_RegionX, a_RegionZ, *res);
+
+	// Return failure, the region is not yet rendered:
+	return RegionPtr(nullptr);
+}
+
+
+
+
+
+void RegionCache::setChunkSource(std::shared_ptr<ChunkSource> a_ChunkSource)
+{
+	// Replace the chunk source:
+	m_ChunkSource = a_ChunkSource;
+
+	// Clear the cache:
+	QMutexLocker lock(&m_Mtx);
+	m_Cache.clear();
+}
+
+
+
+
+
+void RegionCache::reload()
+{
+	assert(m_ChunkSource.get() != nullptr);
+
+	// Reload the chunk source:
+	m_ChunkSource->reload();
+
+	// Clear the cache:
+	QMutexLocker lock(&m_Mtx);
+	m_Cache.clear();
+}
+
+
+
+
+
+void RegionCache::gotRegion(int a_RegionX, int a_RegionZ)
+{
+	emit regionAvailable(a_RegionX, a_RegionZ);
+}
+
+
+
+
+
+quint32 RegionCache::getRegionHash(int a_RegionX, int a_RegionZ)
+{
+	// Simply join the two coords into a single int
+	// The coords will never be larger than 16-bits, so we can do this safely
+	return (((static_cast<quint32>(a_RegionX) & 0xffff) << 16) | (static_cast<quint32>(a_RegionZ) & 0xffff));
+}
+
+
+
+
+
+void RegionCache::queueRegionRender(int a_RegionX, int a_RegionZ, RegionPtr & a_Region)
+{
+	// Create a new loader task:
+	RegionLoader * loader = new RegionLoader(a_RegionX, a_RegionZ, a_Region, m_ChunkSource);
+	connect(loader, SIGNAL(loaded(int, int)), this, SLOT(gotRegion(int, int)));
+
+	QThreadPool::globalInstance()->start(loader);
+}
+
+
+
+
diff --git a/Tools/QtBiomeVisualiser/ChunkCache.h b/Tools/QtBiomeVisualiser/RegionCache.h
index 8d198f02f..c343e4ba9 100644
--- a/Tools/QtBiomeVisualiser/ChunkCache.h
+++ b/Tools/QtBiomeVisualiser/RegionCache.h
@@ -9,8 +9,9 @@
 
 
 
-class Chunk;
-typedef std::shared_ptr<Chunk> ChunkPtr;
+// fwd:
+class Region;
+typedef std::shared_ptr<Region> RegionPtr;
 
 class ChunkSource;
 
@@ -18,19 +19,19 @@ class ChunkSource;
 
 
 
-/** Caches chunk data for reuse */
-class ChunkCache :
+/** Caches regions' chunk data for reuse */
+class RegionCache :
 	public QObject
 {
 	typedef QObject super;
 	Q_OBJECT
 
 public:
-	explicit ChunkCache(QObject * parent = NULL);
+	explicit RegionCache(QObject * parent = NULL);
 
-	/** Retrieves the specified chunk from the cache.
-	Only returns valid chunks; if the chunk is invalid, queues it for rendering and returns an empty ptr. */
-	ChunkPtr fetch(int a_ChunkX, int a_ChunkZ);
+	/** Retrieves the specified region from the cache.
+	Only returns valid regions; if the region is invalid, queues it for rendering and returns an empty ptr. */
+	RegionPtr fetch(int a_RegionX, int a_RegionZ);
 
 	/** Replaces the chunk source used by the biome view to get the chunk biome data.
 	The cache is then invalidated. */
@@ -43,16 +44,16 @@ public:
 	void reload();
 
 signals:
-	void chunkAvailable(int a_ChunkX, int a_ChunkZ);
+	void regionAvailable(int a_RegionX, int a_RegionZ);
 
 protected slots:
-	void gotChunk(int a_ChunkX, int a_ChunkZ);
+	void gotRegion(int a_RegionX, int a_RegionZ);
 
 protected:
 	/** The cache of the chunks */
-	QCache<quint32, ChunkPtr> m_Cache;
+	QCache<quint32, RegionPtr> m_Cache;
 
-	/** Locks te cache against multithreaded access */
+	/** Locks the cache against multithreaded access */
 	QMutex m_Mtx;
 
 	/** The source used to get the biome data. */
@@ -60,10 +61,10 @@ protected:
 
 
 	/** Returns the hash used by the chunk in the cache */
-	quint32 getChunkHash(int a_ChunkX, int a_ChunkZ);
+	quint32 getRegionHash(int a_RegionX, int a_RegionZ);
 
-	/** Queues the specified chunk for rendering by m_ChunkSource. */
-	void queueChunkRender(int a_ChunkX, int a_ChunkZ, ChunkPtr & a_Chunk);
+	/** Queues the specified region for rendering by m_RegionSource. */
+	void queueRegionRender(int a_RegionX, int a_RegionZ, RegionPtr & a_Region);
 };
 
 
diff --git a/Tools/QtBiomeVisualiser/RegionLoader.cpp b/Tools/QtBiomeVisualiser/RegionLoader.cpp
new file mode 100644
index 000000000..2a318098b
--- /dev/null
+++ b/Tools/QtBiomeVisualiser/RegionLoader.cpp
@@ -0,0 +1,49 @@
+#include "Globals.h"
+#include "RegionLoader.h"
+#include "ChunkSource.h"
+#include "Region.h"
+
+
+
+
+
+volatile bool RegionLoader::m_IsShuttingDown = false;
+
+
+
+
+
+RegionLoader::RegionLoader(int a_RegionX, int a_RegionZ, RegionPtr a_Region, ChunkSourcePtr a_ChunkSource) :
+	m_RegionX(a_RegionX),
+	m_RegionZ(a_RegionZ),
+	m_Region(a_Region),
+	m_ChunkSource(a_ChunkSource)
+{
+}
+
+
+
+
+
+void RegionLoader::run()
+{
+	// Load all the chunks in this region:
+	for (int z = 0; z < 32; z++)
+	{
+		for (int x = 0; x < 32; x++)
+		{
+			m_ChunkSource->getChunkBiomes(m_RegionX * 32 + x, m_RegionZ * 32 + z, m_Region->getRelChunk(x, z));
+			if (m_IsShuttingDown)
+			{
+				return;
+			}
+		}
+	}
+	m_Region->m_IsValid = true;
+
+	emit loaded(m_RegionX, m_RegionZ);
+}
+
+
+
+
diff --git a/Tools/QtBiomeVisualiser/RegionLoader.h b/Tools/QtBiomeVisualiser/RegionLoader.h
new file mode 100644
index 000000000..6bbb4aa60
--- /dev/null
+++ b/Tools/QtBiomeVisualiser/RegionLoader.h
@@ -0,0 +1,56 @@
+#pragma once
+
+#include <QObject>
+#include <QRunnable>
+#include <memory>
+
+
+
+
+// fwd:
+class Region;
+typedef std::shared_ptr<Region> RegionPtr;
+
+class ChunkSource;
+typedef std::shared_ptr<ChunkSource> ChunkSourcePtr;
+
+
+
+
+
+class RegionLoader :
+	public QObject,
+	public QRunnable
+{
+	Q_OBJECT
+
+public:
+	RegionLoader(int a_RegionX, int a_RegionZ, RegionPtr a_Region, ChunkSourcePtr a_ChunkSource);
+	virtual ~RegionLoader() {}
+
+	/** Signals to all loaders that the app is shutting down and the loading should be aborted. */
+	static void shutdown() { m_IsShuttingDown = true; }
+
+signals:
+	void loaded(int a_RegionX, int a_RegionZ);
+
+protected:
+	virtual void run() override;
+
+private:
+	/** Coords of the region to be loaded. */
+	int m_RegionX, m_RegionZ;
+
+	/** The region to be loaded. */
+	RegionPtr m_Region;
+
+	/** The chunk source to be used for individual chunks within the region. */
+	ChunkSourcePtr m_ChunkSource;
+
+	/** Flag that is set upon app exit to terminate the queued loaders faster. */
+	static volatile bool m_IsShuttingDown;
+};
+
+
+
+
diff --git a/app.yml b/app.yml
new file mode 100644
index 000000000..44edf0852
--- /dev/null
+++ b/app.yml
@@ -0,0 +1,11 @@
+name: MCServer
+image: ubuntu-14-04-x64
+config:
+  #cloud-config
+  packages:
+    - curl
+    - screen
+  runcmd:
+    - mkdir /minecraft
+    - cd /minecraft && curl -s https://raw.githubusercontent.com/mc-server/MCServer/master/easyinstall.sh | sh
+    - cd /minecraft/MCServer && screen -S mcserver -d -m ./MCServer
diff --git a/src/Bindings/AllToLua.pkg b/src/Bindings/AllToLua.pkg
index 7b78578ee..7e174e770 100644
--- a/src/Bindings/AllToLua.pkg
+++ b/src/Bindings/AllToLua.pkg
@@ -74,6 +74,7 @@ $cfile "../BlockEntities/JukeboxEntity.h"
 $cfile "../BlockEntities/NoteEntity.h"
 $cfile "../BlockEntities/SignEntity.h"
 $cfile "../BlockEntities/MobHeadEntity.h"
+$cfile "../BlockEntities/MobSpawnerEntity.h"
 $cfile "../BlockEntities/FlowerPotEntity.h"
 $cfile "../WebAdmin.h"
 $cfile "../Root.h"
diff --git a/src/Bindings/DeprecatedBindings.cpp b/src/Bindings/DeprecatedBindings.cpp
index ded7a0142..6dd6a4e59 100644
--- a/src/Bindings/DeprecatedBindings.cpp
+++ b/src/Bindings/DeprecatedBindings.cpp
@@ -7,6 +7,9 @@
 
 
 #include "../BlockInfo.h"
+#include "../World.h"
+#include "../Entities/Player.h"
+#include "LuaState.h"
 
 
 
@@ -49,7 +52,9 @@ static int tolua_get_AllToLua_g_BlockSpreadLightFalloff(lua_State* tolua_S)
 	{
 		tolua_Error tolua_err;
 		if (!tolua_isnumber(tolua_S, 2, 0, &tolua_err))
+		{
 			tolua_error(tolua_S, "#vinvalid type in array indexing.", &tolua_err);
+		}
 	}
 	#endif
 	BlockType = (int)tolua_tonumber(tolua_S, 2, 0);
@@ -75,7 +80,9 @@ static int tolua_get_AllToLua_g_BlockTransparent(lua_State* tolua_S)
 	{
 		tolua_Error tolua_err;
 		if (!tolua_isnumber(tolua_S, 2, 0, &tolua_err))
+		{
 			tolua_error(tolua_S, "#vinvalid type in array indexing.", &tolua_err);
+		}
 	}
 	#endif
 	BlockType = (int)tolua_tonumber(tolua_S, 2, 0);
@@ -101,7 +108,9 @@ static int tolua_get_AllToLua_g_BlockOneHitDig(lua_State* tolua_S)
 	{
 		tolua_Error tolua_err;
 		if (!tolua_isnumber(tolua_S, 2, 0, &tolua_err))
+		{
 			tolua_error(tolua_S, "#vinvalid type in array indexing.", &tolua_err);
+		}
 	}
 	#endif
 	BlockType = (int)tolua_tonumber(tolua_S, 2, 0);
@@ -127,7 +136,9 @@ static int tolua_get_AllToLua_g_BlockPistonBreakable(lua_State* tolua_S)
 	{
 		tolua_Error tolua_err;
 		if (!tolua_isnumber(tolua_S, 2, 0, &tolua_err))
+		{
 			tolua_error(tolua_S, "#vinvalid type in array indexing.", &tolua_err);
+		}
 	}
 	#endif
 	BlockType = (int)tolua_tonumber(tolua_S, 2, 0);
@@ -153,7 +164,9 @@ static int tolua_get_AllToLua_g_BlockIsSnowable(lua_State* tolua_S)
 	{
 		tolua_Error tolua_err;
 		if (!tolua_isnumber(tolua_S, 2, 0, &tolua_err))
+		{
 			tolua_error(tolua_S, "#vinvalid type in array indexing.", &tolua_err);
+		}
 	}
 	#endif
 	BlockType = (int)tolua_tonumber(tolua_S, 2, 0);
@@ -179,7 +192,9 @@ static int tolua_get_AllToLua_g_BlockIsSolid(lua_State* tolua_S)
 	{
 		tolua_Error tolua_err;
 		if (!tolua_isnumber(tolua_S, 2, 0, &tolua_err))
+		{
 			tolua_error(tolua_S, "#vinvalid type in array indexing.", &tolua_err);
+		}
 	}
 	#endif
 	BlockType = (int)tolua_tonumber(tolua_S, 2, 0);
@@ -205,7 +220,9 @@ static int tolua_get_AllToLua_g_BlockFullyOccupiesVoxel(lua_State* tolua_S)
 	{
 		tolua_Error tolua_err;
 		if (!tolua_isnumber(tolua_S, 2, 0, &tolua_err))
+		{
 			tolua_error(tolua_S, "#vinvalid type in array indexing.", &tolua_err);
+		}
 	}
 	#endif
 	BlockType = (int)tolua_tonumber(tolua_S, 2, 0);
@@ -222,6 +239,100 @@ static int tolua_get_AllToLua_g_BlockFullyOccupiesVoxel(lua_State* tolua_S)
 
 
 
+/* function: StringToMobType */
+static int tolua_AllToLua_StringToMobType00(lua_State* tolua_S)
+{
+	cLuaState LuaState(tolua_S);
+
+	#ifndef TOLUA_RELEASE
+	tolua_Error tolua_err;
+	if (
+		!tolua_iscppstring(tolua_S, 1, 0, &tolua_err) ||
+		!tolua_isnoobj(tolua_S, 2, &tolua_err)
+		)
+		goto tolua_lerror;
+	else
+	#endif
+	{
+		const AString a_MobString = tolua_tocppstring(LuaState, 1, 0);
+		eMonsterType MobType = cMonster::StringToMobType(a_MobString);
+		tolua_pushnumber(LuaState, (lua_Number) MobType);
+		tolua_pushcppstring(LuaState, (const char *) a_MobString);
+	}
+
+	LOGWARNING("Warning in function call 'StringToMobType': StringToMobType() is deprecated. Please use cMonster:StringToMobType()");
+	LuaState.LogStackTrace(0);
+	return 2;
+
+	#ifndef TOLUA_RELEASE
+tolua_lerror:
+	tolua_error(LuaState, "#ferror in function 'StringToMobType'.", &tolua_err);
+	return 0;
+	#endif
+}
+
+
+
+
+
+/** function: cWorld:SetSignLines */
+static int tolua_cWorld_SetSignLines(lua_State * tolua_S)
+{
+	cLuaState LuaState(tolua_S);
+
+	#ifndef TOLUA_RELEASE
+	tolua_Error tolua_err;
+	if (
+		!tolua_isusertype (LuaState, 1, "cWorld", 0, &tolua_err) ||
+		!tolua_isnumber   (LuaState, 2, 0, &tolua_err) ||
+		!tolua_isnumber   (LuaState, 3, 0, &tolua_err) ||
+		!tolua_isnumber   (LuaState, 4, 0, &tolua_err) ||
+		!tolua_iscppstring(LuaState, 5, 0, &tolua_err) ||
+		!tolua_iscppstring(LuaState, 6, 0, &tolua_err) ||
+		!tolua_iscppstring(LuaState, 7, 0, &tolua_err) ||
+		!tolua_iscppstring(LuaState, 8, 0, &tolua_err) ||
+		!tolua_isusertype (LuaState, 9, "cPlayer", 1, &tolua_err) ||
+		!tolua_isnoobj    (LuaState, 10, &tolua_err)
+		)
+		goto tolua_lerror;
+	else
+	#endif
+	{
+		cWorld * self       = (cWorld *) tolua_tousertype (LuaState, 1, nullptr);
+		int BlockX          = (int)      tolua_tonumber   (LuaState, 2, 0);
+		int BlockY          = (int)      tolua_tonumber   (LuaState, 3, 0);
+		int BlockZ          = (int)      tolua_tonumber   (LuaState, 4, 0);
+		const AString Line1 =            tolua_tocppstring(LuaState, 5, 0);
+		const AString Line2 =            tolua_tocppstring(LuaState, 6, 0);
+		const AString Line3 =            tolua_tocppstring(LuaState, 7, 0);
+		const AString Line4 =            tolua_tocppstring(LuaState, 8, 0);
+		cPlayer * Player    = (cPlayer *)tolua_tousertype (LuaState, 9, nullptr);
+		#ifndef TOLUA_RELEASE
+		if (self == nullptr)
+		{
+			tolua_error(LuaState, "invalid 'self' in function 'UpdateSign'", nullptr);
+		}
+		#endif
+		{
+			bool res = self->SetSignLines(BlockX, BlockY, BlockZ, Line1, Line2, Line3, Line4, Player);
+			tolua_pushboolean(LuaState, res ? 1 : 0);
+		}
+	}
+	LOGWARNING("Warning in function call 'UpdateSign': UpdateSign() is deprecated. Please use SetSignLines()");
+	LuaState.LogStackTrace(0);
+	return 1;
+	
+	#ifndef TOLUA_RELEASE
+tolua_lerror:
+	tolua_error(LuaState, "#ferror in function 'UpdateSign'.", &tolua_err);
+	return 0;
+	#endif
+}
+
+
+
+
+
 void DeprecatedBindings::Bind(lua_State * tolua_S)
 {
 	tolua_beginmodule(tolua_S, nullptr);
@@ -235,6 +346,12 @@ void DeprecatedBindings::Bind(lua_State * tolua_S)
 	tolua_array(tolua_S, "g_BlockIsSolid",             tolua_get_AllToLua_g_BlockIsSolid,             nullptr);
 	tolua_array(tolua_S, "g_BlockFullyOccupiesVoxel",  tolua_get_AllToLua_g_BlockFullyOccupiesVoxel,  nullptr);
 
+	tolua_function(tolua_S, "StringToMobType", tolua_AllToLua_StringToMobType00);
+
+	tolua_beginmodule(tolua_S, "cWorld");
+		tolua_function(tolua_S, "UpdateSign", tolua_cWorld_SetSignLines);
+	tolua_endmodule(tolua_S);
+
 	tolua_endmodule(tolua_S);
 }
 
diff --git a/src/Bindings/LuaState.h b/src/Bindings/LuaState.h
index d1e9923b4..c13e36188 100644
--- a/src/Bindings/LuaState.h
+++ b/src/Bindings/LuaState.h
@@ -247,7 +247,11 @@ public:
 	template <typename FnT, typename... Args>
 	bool Call(const FnT & a_Function, Args &&... args)
 	{
-		PushFunction(a_Function);
+		if (!PushFunction(a_Function))
+		{
+			// Pushing the function failed
+			return false;
+		}
 		return PushCallPop(args...);
 	}
 
diff --git a/src/Bindings/ManualBindings.cpp b/src/Bindings/ManualBindings.cpp
index a4a5d79b4..56f2e73bc 100644
--- a/src/Bindings/ManualBindings.cpp
+++ b/src/Bindings/ManualBindings.cpp
@@ -1034,11 +1034,11 @@ static int tolua_cWorld_SetSignLines(lua_State * tolua_S)
 		#ifndef TOLUA_RELEASE
 		if (self == nullptr)
 		{
-			tolua_error(tolua_S, "invalid 'self' in function 'SetSignLines' / 'UpdateSign'", nullptr);
+			tolua_error(tolua_S, "invalid 'self' in function 'SetSignLines'", nullptr);
 		}
 		#endif
 		{
-			bool res = self->UpdateSign(BlockX, BlockY, BlockZ, Line1, Line2, Line3, Line4, Player);
+			bool res = self->SetSignLines(BlockX, BlockY, BlockZ, Line1, Line2, Line3, Line4, Player);
 			tolua_pushboolean(tolua_S, res ? 1 : 0);
 		}
 	}
@@ -1046,7 +1046,7 @@ static int tolua_cWorld_SetSignLines(lua_State * tolua_S)
 	
 	#ifndef TOLUA_RELEASE
 tolua_lerror:
-	tolua_error(tolua_S, "#ferror in function 'SetSignLines' / 'UpdateSign'.", &tolua_err);
+	tolua_error(tolua_S, "#ferror in function 'SetSignLines'.", &tolua_err);
 	return 0;
 	#endif
 }
@@ -1874,6 +1874,72 @@ static int tolua_cWorld_ChunkStay(lua_State * tolua_S)
 
 
 
+static int tolua_cWorld_PrepareChunk(lua_State * tolua_S)
+{
+	/* Function signature:
+	World:PrepareChunk(ChunkX, ChunkZ, Callback)
+	*/
+	
+	// Check the param types:
+	cLuaState L(tolua_S);
+	if (
+		!L.CheckParamUserType     (1, "cWorld") ||
+		!L.CheckParamNumber       (2, 3) ||
+		!L.CheckParamFunctionOrNil(4)
+	)
+	{
+		return 0;
+	}
+	
+	// Read the params:
+	cWorld * world = nullptr;
+	int chunkX = 0, chunkZ = 0;
+	L.GetStackValues(1, world, chunkX, chunkZ);
+	if (world == nullptr)
+	{
+		LOGWARNING("World:PrepareChunk(): invalid world parameter");
+		L.LogStackTrace();
+		return 0;
+	}
+
+	// Wrap the Lua callback inside a C++ callback class:
+	class cCallback:
+		public cChunkCoordCallback
+	{
+	public:
+		cCallback(lua_State * a_LuaState):
+			m_LuaState(a_LuaState),
+			m_Callback(m_LuaState, 4)
+		{
+		}
+
+		// cChunkCoordCallback override:
+		virtual void Call(int a_CBChunkX, int a_CBChunkZ) override
+		{
+			if (m_Callback.IsValid())
+			{
+				m_LuaState.Call(m_Callback, a_CBChunkX, a_CBChunkZ);
+			}
+
+			// This is the last reference of this object, we must delete it so that it doesn't leak:
+			delete this;
+		}
+
+	protected:
+		cLuaState m_LuaState;
+		cLuaState::cRef m_Callback;
+	};
+	cCallback * callback = new cCallback(tolua_S);
+
+	// Call the chunk preparation:
+	world->PrepareChunk(chunkX, chunkZ, callback);
+	return 0;
+}
+
+
+
+
+
 static int tolua_cPlayer_GetPermissions(lua_State * tolua_S)
 {
 	// Function signature: cPlayer:GetPermissions() -> {permissions-array}
@@ -3368,6 +3434,7 @@ void ManualBindings::Bind(lua_State * tolua_S)
 		
 		tolua_beginmodule(tolua_S, "cRoot");
 			tolua_function(tolua_S, "FindAndDoWithPlayer", tolua_DoWith <cRoot, cPlayer, &cRoot::FindAndDoWithPlayer>);
+			tolua_function(tolua_S, "DoWithPlayerByUUID",  tolua_DoWith <cRoot, cPlayer, &cRoot::DoWithPlayerByUUID>);
 			tolua_function(tolua_S, "ForEachPlayer",       tolua_ForEach<cRoot, cPlayer, &cRoot::ForEachPlayer>);
 			tolua_function(tolua_S, "ForEachWorld",        tolua_ForEach<cRoot, cWorld,  &cRoot::ForEachWorld>);
 			tolua_function(tolua_S, "GetFurnaceRecipe",    tolua_cRoot_GetFurnaceRecipe);
@@ -3389,6 +3456,7 @@ void ManualBindings::Bind(lua_State * tolua_S)
 			tolua_function(tolua_S, "DoWithFlowerPotAt",         tolua_DoWithXYZ<cWorld, cFlowerPotEntity,    &cWorld::DoWithFlowerPotAt>);
 			tolua_function(tolua_S, "DoWithPlayer",              tolua_DoWith<   cWorld, cPlayer,             &cWorld::DoWithPlayer>);
 			tolua_function(tolua_S, "FindAndDoWithPlayer",       tolua_DoWith<   cWorld, cPlayer,             &cWorld::FindAndDoWithPlayer>);
+			tolua_function(tolua_S, "DoWithPlayerByUUID",        tolua_DoWith<   cWorld, cPlayer,             &cWorld::DoWithPlayerByUUID>);
 			tolua_function(tolua_S, "ForEachBlockEntityInChunk", tolua_ForEachInChunk<cWorld, cBlockEntity,   &cWorld::ForEachBlockEntityInChunk>);
 			tolua_function(tolua_S, "ForEachChestInChunk",       tolua_ForEachInChunk<cWorld, cChestEntity,   &cWorld::ForEachChestInChunk>);
 			tolua_function(tolua_S, "ForEachEntity",             tolua_ForEach<       cWorld, cEntity,        &cWorld::ForEachEntity>);
@@ -3399,11 +3467,11 @@ void ManualBindings::Bind(lua_State * tolua_S)
 			tolua_function(tolua_S, "GetBlockInfo",              tolua_cWorld_GetBlockInfo);
 			tolua_function(tolua_S, "GetBlockTypeMeta",          tolua_cWorld_GetBlockTypeMeta);
 			tolua_function(tolua_S, "GetSignLines",              tolua_cWorld_GetSignLines);
+			tolua_function(tolua_S, "PrepareChunk",              tolua_cWorld_PrepareChunk);
 			tolua_function(tolua_S, "QueueTask",                 tolua_cWorld_QueueTask);
 			tolua_function(tolua_S, "ScheduleTask",              tolua_cWorld_ScheduleTask);
 			tolua_function(tolua_S, "SetSignLines",              tolua_cWorld_SetSignLines);
 			tolua_function(tolua_S, "TryGetHeight",              tolua_cWorld_TryGetHeight);
-			tolua_function(tolua_S, "UpdateSign",                tolua_cWorld_SetSignLines);
 		tolua_endmodule(tolua_S);
 		
 		tolua_beginmodule(tolua_S, "cMapManager");
diff --git a/src/Bindings/Plugin.h b/src/Bindings/Plugin.h
index 8cc9ff0cd..08677553c 100644
--- a/src/Bindings/Plugin.h
+++ b/src/Bindings/Plugin.h
@@ -54,7 +54,7 @@ public:
 	virtual bool OnChunkUnloaded            (cWorld & a_World, int a_ChunkX, int a_ChunkZ) = 0;
 	virtual bool OnChunkUnloading           (cWorld & a_World, int a_ChunkX, int a_ChunkZ) = 0;
 	virtual bool OnCollectingPickup         (cPlayer & a_Player, cPickup & a_Pickup) = 0;
-	virtual bool OnCraftingNoRecipe         (cPlayer & a_Player, cCraftingGrid & a_Grid, cCraftingRecipe * a_Recipe) = 0;
+	virtual bool OnCraftingNoRecipe         (cPlayer & a_Player, cCraftingGrid & a_Grid, cCraftingRecipe & a_Recipe) = 0;
 	virtual bool OnDisconnect               (cClientHandle & a_Client, const AString & a_Reason) = 0;
 	virtual bool OnEntityAddEffect          (cEntity & a_Entity, int a_EffectType, int a_EffectDurationTicks, int a_EffectIntensity, double a_DistanceModifier) = 0;
 	virtual bool OnExecuteCommand           (cPlayer * a_Player, const AStringVector & a_Split) = 0;
diff --git a/src/Bindings/PluginLua.cpp b/src/Bindings/PluginLua.cpp
index 391d8bcbe..ea782ea3f 100644
--- a/src/Bindings/PluginLua.cpp
+++ b/src/Bindings/PluginLua.cpp
@@ -382,7 +382,7 @@ bool cPluginLua::OnCollectingPickup(cPlayer & a_Player, cPickup & a_Pickup)
 
 
 
-bool cPluginLua::OnCraftingNoRecipe(cPlayer & a_Player, cCraftingGrid & a_Grid, cCraftingRecipe * a_Recipe)
+bool cPluginLua::OnCraftingNoRecipe(cPlayer & a_Player, cCraftingGrid & a_Grid, cCraftingRecipe & a_Recipe)
 {
 	cCSLock Lock(m_CriticalSection);
 	bool res = false;
diff --git a/src/Bindings/PluginLua.h b/src/Bindings/PluginLua.h
index 6bb134efc..7de5ffec4 100644
--- a/src/Bindings/PluginLua.h
+++ b/src/Bindings/PluginLua.h
@@ -78,7 +78,7 @@ public:
 	virtual bool OnChunkUnloaded            (cWorld & a_World, int a_ChunkX, int a_ChunkZ) override;
 	virtual bool OnChunkUnloading           (cWorld & a_World, int a_ChunkX, int a_ChunkZ) override;
 	virtual bool OnCollectingPickup         (cPlayer & a_Player, cPickup & a_Pickup) override;
-	virtual bool OnCraftingNoRecipe         (cPlayer & a_Player, cCraftingGrid & a_Grid, cCraftingRecipe * a_Recipe) override;
+	virtual bool OnCraftingNoRecipe         (cPlayer & a_Player, cCraftingGrid & a_Grid, cCraftingRecipe & a_Recipe) override;
 	virtual bool OnDisconnect               (cClientHandle & a_Client, const AString & a_Reason) override;
 	virtual bool OnEntityAddEffect          (cEntity & a_Entity, int a_EffectType, int a_EffectDurationTicks, int a_EffectIntensity, double a_DistanceModifier) override;
 	virtual bool OnExecuteCommand           (cPlayer * a_Player, const AStringVector & a_Split) override;
diff --git a/src/Bindings/PluginManager.cpp b/src/Bindings/PluginManager.cpp
index f63578885..406a540f4 100644
--- a/src/Bindings/PluginManager.cpp
+++ b/src/Bindings/PluginManager.cpp
@@ -448,7 +448,7 @@ bool cPluginManager::CallHookCollectingPickup(cPlayer & a_Player, cPickup & a_Pi
 
 
 
-bool cPluginManager::CallHookCraftingNoRecipe(cPlayer & a_Player, cCraftingGrid & a_Grid, cCraftingRecipe * a_Recipe)
+bool cPluginManager::CallHookCraftingNoRecipe(cPlayer & a_Player, cCraftingGrid & a_Grid, cCraftingRecipe & a_Recipe)
 {
 	FIND_HOOK(HOOK_CRAFTING_NO_RECIPE);
 	VERIFY_HOOK;
@@ -1459,11 +1459,16 @@ cPluginManager::CommandResult cPluginManager::HandleCommand(cPlayer & a_Player,
 
 
 
-cPlugin * cPluginManager::GetPlugin( const AString & a_Plugin) const
+cPlugin * cPluginManager::GetPlugin(const AString & a_Plugin) const
 {
 	for (PluginMap::const_iterator itr = m_Plugins.begin(); itr != m_Plugins.end(); ++itr)
 	{
-		if (itr->second == nullptr) continue;
+		if (itr->second == nullptr)
+		{
+			// The plugin is currently unloaded
+			continue;
+		}
+
 		if (itr->second->GetName().compare(a_Plugin) == 0)
 		{
 			return itr->second;
diff --git a/src/Bindings/PluginManager.h b/src/Bindings/PluginManager.h
index bc8c1f5e6..3a2aecc92 100644
--- a/src/Bindings/PluginManager.h
+++ b/src/Bindings/PluginManager.h
@@ -187,7 +187,7 @@ public:
 	bool CallHookChunkUnloaded            (cWorld & a_World, int a_ChunkX, int a_ChunkZ);
 	bool CallHookChunkUnloading           (cWorld & a_World, int a_ChunkX, int a_ChunkZ);
 	bool CallHookCollectingPickup         (cPlayer & a_Player, cPickup & a_Pickup);
-	bool CallHookCraftingNoRecipe         (cPlayer & a_Player, cCraftingGrid & a_Grid, cCraftingRecipe * a_Recipe);
+	bool CallHookCraftingNoRecipe         (cPlayer & a_Player, cCraftingGrid & a_Grid, cCraftingRecipe & a_Recipe);
 	bool CallHookDisconnect               (cClientHandle & a_Client, const AString & a_Reason);
 	bool CallHookEntityAddEffect          (cEntity & a_Entity, int a_EffectType, int a_EffectDurationTicks, int a_EffectIntensity, double a_DistanceModifier);
 	bool CallHookExecuteCommand           (cPlayer * a_Player, const AStringVector & a_Split);  // If a_Player == nullptr, it is a console cmd
diff --git a/src/BiomeDef.cpp b/src/BiomeDef.cpp
index 02f8c2232..188e06173 100644
--- a/src/BiomeDef.cpp
+++ b/src/BiomeDef.cpp
@@ -160,3 +160,65 @@ bool IsBiomeNoDownfall(EMCSBiome a_Biome)
 		}
 	}
 }
+
+
+
+
+
+bool IsBiomeVeryCold(EMCSBiome a_Biome)
+{
+	switch (a_Biome)
+	{
+		case biFrozenOcean:
+		case biFrozenRiver:
+		case biIcePlains:
+		case biIceMountains:
+		case biColdBeach:
+		case biColdTaiga:
+		case biColdTaigaHills:
+		case biIcePlainsSpikes:
+		case biColdTaigaM:
+		{
+			return true;
+		}
+		default:
+		{
+			return false;
+		}
+	}
+}
+
+
+
+
+bool IsBiomeCold(EMCSBiome a_Biome)
+{
+	switch (a_Biome)
+	{
+		case biExtremeHills:
+		case biTaiga:
+		case biTaigaHills:
+		case biExtremeHillsEdge:
+		case biStoneBeach:
+		case biMegaTaiga:
+		case biMegaTaigaHills:
+		case biExtremeHillsPlus:
+		case biExtremeHillsM:
+		case biTaigaM:
+		case biColdTaigaM:
+		case biMegaSpruceTaiga:
+		case biMegaSpruceTaigaHills:
+		case biExtremeHillsPlusM:
+		{
+			return true;
+		}
+		default:
+		{
+			return false;
+		}
+	}
+}
+
+
+
+
diff --git a/src/BiomeDef.h b/src/BiomeDef.h
index f929596e9..84751cfd7 100644
--- a/src/BiomeDef.h
+++ b/src/BiomeDef.h
@@ -113,5 +113,20 @@ extern AString BiomeToString(int a_Biome);
 /** Returns true if the biome has no downfall - deserts and savannas */
 extern bool IsBiomeNoDownfall(EMCSBiome a_Biome);
 
+/** Returns true if the biome is an ocean biome. */
+inline bool IsBiomeOcean(int a_Biome)
+{
+	return ((a_Biome == biOcean) || (a_Biome == biDeepOcean));
+}
+
+/** Returns true if the biome is very cold
+(has snow on ground everywhere, turns top water to ice, has snowfall instead of rain everywhere).
+Doesn't report mildly cold biomes (where it snows above certain elevation), use IsBiomeCold() for those. */
+extern bool IsBiomeVeryCold(EMCSBiome a_Biome);
+
+/** Returns true if the biome is cold
+(has snow and snowfall at higher elevations but not at regular heights).
+Doesn't report Very Cold biomes, use IsBiomeVeryCold() for those. */
+extern bool IsBiomeCold(EMCSBiome a_Biome);
 
 // tolua_end
diff --git a/src/BlockEntities/BeaconEntity.cpp b/src/BlockEntities/BeaconEntity.cpp
index 85819446c..409f2937c 100644
--- a/src/BlockEntities/BeaconEntity.cpp
+++ b/src/BlockEntities/BeaconEntity.cpp
@@ -247,15 +247,16 @@ void cBeaconEntity::GiveEffects(void)
 		}
 
 	public:
-		cPlayerCallback(int a_Radius, int a_PosX, int a_PosY, int a_PosZ, cEntityEffect::eType a_PrimaryEffect, cEntityEffect::eType a_SecondaryEffect, short a_EffectLevel)
-			: m_Radius(a_Radius)
-			, m_PosX(a_PosX)
-			, m_PosY(a_PosY)
-			, m_PosZ(a_PosZ)
-			, m_PrimaryEffect(a_PrimaryEffect)
-			, m_SecondaryEffect(a_SecondaryEffect)
-			, m_EffectLevel(a_EffectLevel)
-		{};
+		cPlayerCallback(int a_Radius, int a_PosX, int a_PosY, int a_PosZ, cEntityEffect::eType a_PrimaryEffect, cEntityEffect::eType a_SecondaryEffect, short a_EffectLevel):
+			m_Radius(a_Radius),
+			m_PosX(a_PosX),
+			m_PosY(a_PosY),
+			m_PosZ(a_PosZ),
+			m_PrimaryEffect(a_PrimaryEffect),
+			m_SecondaryEffect(a_SecondaryEffect),
+			m_EffectLevel(a_EffectLevel)
+		{
+		}
 
 	} PlayerCallback(Radius, m_PosX, m_PosY, m_PosZ, m_PrimaryEffect, SecondaryEffect, EffectLevel);
 	GetWorld()->ForEachPlayer(PlayerCallback);
diff --git a/src/BlockEntities/BeaconEntity.h b/src/BlockEntities/BeaconEntity.h
index d1db3a68f..bc27e92b0 100644
--- a/src/BlockEntities/BeaconEntity.h
+++ b/src/BlockEntities/BeaconEntity.h
@@ -1,3 +1,4 @@
+
 // BeaconEntity.h
 
 // Declares the cBeaconEntity class representing a single beacon in the world
@@ -14,15 +15,6 @@
 
 
 
-namespace Json
-{
-	class Value;
-}
-
-
-
-
-
 // tolua_begin
 class cBeaconEntity :
 	public cBlockEntityWithItems
@@ -32,7 +24,7 @@ class cBeaconEntity :
 public:
 	// tolua_end
 
-	BLOCKENTITY_PROTODEF(cBeaconEntity);
+	BLOCKENTITY_PROTODEF(cBeaconEntity)
 
 	cBeaconEntity(int a_BlockX, int a_BlockY, int a_BlockZ, cWorld * a_World);
 
diff --git a/src/BlockEntities/BlockEntity.cpp b/src/BlockEntities/BlockEntity.cpp
index 3d96e891e..c59198e79 100644
--- a/src/BlockEntities/BlockEntity.cpp
+++ b/src/BlockEntities/BlockEntity.cpp
@@ -14,10 +14,11 @@
 #include "FlowerPotEntity.h"
 #include "FurnaceEntity.h"
 #include "HopperEntity.h"
+#include "MobHeadEntity.h"
+#include "MobSpawnerEntity.h"
 #include "JukeboxEntity.h"
 #include "NoteEntity.h"
 #include "SignEntity.h"
-#include "MobHeadEntity.h"
 
 
 
@@ -37,6 +38,7 @@ cBlockEntity * cBlockEntity::CreateByBlockType(BLOCKTYPE a_BlockType, NIBBLETYPE
 		case E_BLOCK_FURNACE:       return new cFurnaceEntity     (a_BlockX, a_BlockY, a_BlockZ, a_BlockType, a_BlockMeta, a_World);
 		case E_BLOCK_HEAD:          return new cMobHeadEntity     (a_BlockX, a_BlockY, a_BlockZ, a_World);
 		case E_BLOCK_HOPPER:        return new cHopperEntity      (a_BlockX, a_BlockY, a_BlockZ, a_World);
+		case E_BLOCK_MOB_SPAWNER:   return new cMobSpawnerEntity  (a_BlockX, a_BlockY, a_BlockZ, a_World);
 		case E_BLOCK_JUKEBOX:       return new cJukeboxEntity     (a_BlockX, a_BlockY, a_BlockZ, a_World);
 		case E_BLOCK_LIT_FURNACE:   return new cFurnaceEntity     (a_BlockX, a_BlockY, a_BlockZ, a_BlockType, a_BlockMeta, a_World);
 		case E_BLOCK_SIGN_POST:     return new cSignEntity        (a_BlockType, a_BlockX, a_BlockY, a_BlockZ, a_World);
diff --git a/src/BlockEntities/BlockEntity.h b/src/BlockEntities/BlockEntity.h
index ffd6ee856..056a88721 100644
--- a/src/BlockEntities/BlockEntity.h
+++ b/src/BlockEntities/BlockEntity.h
@@ -28,11 +28,6 @@
 
 
 
-namespace Json
-{
-	class Value;
-};
-
 class cChunk;
 class cPlayer;
 class cWorld;
@@ -115,7 +110,7 @@ public:
 	virtual void SendTo(cClientHandle & a_Client) = 0;
 	
 	/// Ticks the entity; returns true if the chunk should be marked as dirty as a result of this ticking. By default does nothing.
-	virtual bool Tick(float a_Dt, cChunk & /* a_Chunk */)
+	virtual bool Tick(float a_Dt, cChunk & a_Chunk)
 	{
 		UNUSED(a_Dt);
 		return false;
diff --git a/src/BlockEntities/BlockEntityWithItems.h b/src/BlockEntities/BlockEntityWithItems.h
index 8c7d4749b..2c2ced1cb 100644
--- a/src/BlockEntities/BlockEntityWithItems.h
+++ b/src/BlockEntities/BlockEntityWithItems.h
@@ -29,7 +29,7 @@ class cBlockEntityWithItems :
 public:
 	// tolua_end
 	
-	BLOCKENTITY_PROTODEF(cBlockEntityWithItems);
+	BLOCKENTITY_PROTODEF(cBlockEntityWithItems)
 	
 	cBlockEntityWithItems(
 		BLOCKTYPE a_BlockType,                      // Type of the block that the entity represents
diff --git a/src/BlockEntities/CMakeLists.txt b/src/BlockEntities/CMakeLists.txt
index d87594b0d..5f4af288d 100644
--- a/src/BlockEntities/CMakeLists.txt
+++ b/src/BlockEntities/CMakeLists.txt
@@ -18,6 +18,7 @@ SET (SRCS
 	HopperEntity.cpp
 	JukeboxEntity.cpp
 	MobHeadEntity.cpp
+	MobSpawnerEntity.cpp
 	NoteEntity.cpp
 	SignEntity.cpp)
 
@@ -36,6 +37,7 @@ SET (HDRS
 	HopperEntity.h
 	JukeboxEntity.h
 	MobHeadEntity.h
+	MobSpawnerEntity.h
 	NoteEntity.h
 	SignEntity.h)
 
diff --git a/src/BlockEntities/ChestEntity.h b/src/BlockEntities/ChestEntity.h
index 09fffb923..645dbf4bc 100644
--- a/src/BlockEntities/ChestEntity.h
+++ b/src/BlockEntities/ChestEntity.h
@@ -7,11 +7,6 @@
 
 
 
-namespace Json
-{
-	class Value;
-};
-
 class cClientHandle;
 
 
@@ -33,7 +28,7 @@ public:
 	
 	// tolua_end
 	
-	BLOCKENTITY_PROTODEF(cChestEntity);
+	BLOCKENTITY_PROTODEF(cChestEntity)
 	
 	/** Constructor used for normal operation */
 	cChestEntity(int a_BlockX, int a_BlockY, int a_BlockZ, cWorld * a_World, BLOCKTYPE a_Type);
diff --git a/src/BlockEntities/CommandBlockEntity.h b/src/BlockEntities/CommandBlockEntity.h
index 217390293..d8ac054f0 100644
--- a/src/BlockEntities/CommandBlockEntity.h
+++ b/src/BlockEntities/CommandBlockEntity.h
@@ -15,14 +15,6 @@
 
 
 
-namespace Json
-{
-	class Value;
-}
-
-
-
-
 
 // tolua_begin
 
@@ -36,7 +28,7 @@ public:
 
 	// tolua_end
 	
-	BLOCKENTITY_PROTODEF(cCommandBlockEntity);
+	BLOCKENTITY_PROTODEF(cCommandBlockEntity)
 	
 	/// Creates a new empty command block entity
 	cCommandBlockEntity(int a_X, int a_Y, int a_Z, cWorld * a_World);
diff --git a/src/BlockEntities/DispenserEntity.h b/src/BlockEntities/DispenserEntity.h
index 5ba87b716..12e12942a 100644
--- a/src/BlockEntities/DispenserEntity.h
+++ b/src/BlockEntities/DispenserEntity.h
@@ -17,7 +17,7 @@ public:
 
 	// tolua_end
 
-	BLOCKENTITY_PROTODEF(cDispenserEntity);
+	BLOCKENTITY_PROTODEF(cDispenserEntity)
 	
 	/** Constructor used for normal operation */
 	cDispenserEntity(int a_BlockX, int a_BlockY, int a_BlockZ, cWorld * a_World);
diff --git a/src/BlockEntities/DropSpenserEntity.h b/src/BlockEntities/DropSpenserEntity.h
index f77a28c28..6c23a402f 100644
--- a/src/BlockEntities/DropSpenserEntity.h
+++ b/src/BlockEntities/DropSpenserEntity.h
@@ -16,10 +16,6 @@
 
 
 
-namespace Json
-{
-	class Value;
-}
 
 class cClientHandle;
 
@@ -45,7 +41,7 @@ public:
 	
 	// tolua_end
 	
-	BLOCKENTITY_PROTODEF(cDropSpenserEntity);
+	BLOCKENTITY_PROTODEF(cDropSpenserEntity)
 	
 	cDropSpenserEntity(BLOCKTYPE a_BlockType, int a_BlockX, int a_BlockY, int a_BlockZ, cWorld * a_World);
 	virtual ~cDropSpenserEntity();
diff --git a/src/BlockEntities/DropperEntity.h b/src/BlockEntities/DropperEntity.h
index 91adf660f..c638dafa8 100644
--- a/src/BlockEntities/DropperEntity.h
+++ b/src/BlockEntities/DropperEntity.h
@@ -25,7 +25,7 @@ public:
 
 	// tolua_end
 	
-	BLOCKENTITY_PROTODEF(cDropperEntity);
+	BLOCKENTITY_PROTODEF(cDropperEntity)
 	
 	/// Constructor used for normal operation
 	cDropperEntity(int a_BlockX, int a_BlockY, int a_BlockZ, cWorld * a_World);
diff --git a/src/BlockEntities/EnderChestEntity.h b/src/BlockEntities/EnderChestEntity.h
index 17abd880a..af59cf170 100644
--- a/src/BlockEntities/EnderChestEntity.h
+++ b/src/BlockEntities/EnderChestEntity.h
@@ -18,7 +18,7 @@ class cEnderChestEntity :
 public:
 	// tolua_end
 	
-	BLOCKENTITY_PROTODEF(cEnderChestEntity);
+	BLOCKENTITY_PROTODEF(cEnderChestEntity)
 	
 	cEnderChestEntity(int a_BlockX, int a_BlockY, int a_BlockZ, cWorld * a_World);
 	virtual ~cEnderChestEntity();
diff --git a/src/BlockEntities/FlowerPotEntity.h b/src/BlockEntities/FlowerPotEntity.h
index fc886c51f..a4246bb7d 100644
--- a/src/BlockEntities/FlowerPotEntity.h
+++ b/src/BlockEntities/FlowerPotEntity.h
@@ -15,16 +15,6 @@
 
 
 
-
-namespace Json
-{
-	class Value;
-}
-
-
-
-
-
 // tolua_begin
 
 class cFlowerPotEntity :
@@ -36,7 +26,7 @@ public:
 
 	// tolua_end
 	
-	BLOCKENTITY_PROTODEF(cFlowerPotEntity);
+	BLOCKENTITY_PROTODEF(cFlowerPotEntity)
 	
 	/** Creates a new flowerpot entity at the specified block coords. a_World may be nullptr */
 	cFlowerPotEntity(int a_BlocX, int a_BlockY, int a_BlockZ, cWorld * a_World);
diff --git a/src/BlockEntities/FurnaceEntity.h b/src/BlockEntities/FurnaceEntity.h
index 71c2fe127..fbe9d6c75 100644
--- a/src/BlockEntities/FurnaceEntity.h
+++ b/src/BlockEntities/FurnaceEntity.h
@@ -8,11 +8,6 @@
 
 
 
-namespace Json
-{
-	class Value;
-}
-
 class cClientHandle;
 
 
@@ -38,7 +33,7 @@ public:
 	
 	// tolua_end
 	
-	BLOCKENTITY_PROTODEF(cFurnaceEntity);
+	BLOCKENTITY_PROTODEF(cFurnaceEntity)
 	
 	/** Constructor used for normal operation */
 	cFurnaceEntity(int a_BlockX, int a_BlockY, int a_BlockZ, BLOCKTYPE a_BlockType, NIBBLETYPE a_BlockMeta, cWorld * a_World);
diff --git a/src/BlockEntities/HopperEntity.h b/src/BlockEntities/HopperEntity.h
index 7070bbad3..da65aa671 100644
--- a/src/BlockEntities/HopperEntity.h
+++ b/src/BlockEntities/HopperEntity.h
@@ -31,7 +31,7 @@ public:
 
 	// tolua_end
 	
-	BLOCKENTITY_PROTODEF(cHopperEntity);
+	BLOCKENTITY_PROTODEF(cHopperEntity)
 	
 	/// Constructor used for normal operation
 	cHopperEntity(int a_BlockX, int a_BlockY, int a_BlockZ, cWorld * a_World);
diff --git a/src/BlockEntities/JukeboxEntity.h b/src/BlockEntities/JukeboxEntity.h
index 7a69d6499..000f7d87e 100644
--- a/src/BlockEntities/JukeboxEntity.h
+++ b/src/BlockEntities/JukeboxEntity.h
@@ -7,15 +7,6 @@
 
 
 
-namespace Json
-{
-	class Value;
-}
-
-
-
-
-
 // tolua_begin
 
 class cJukeboxEntity :
@@ -26,7 +17,7 @@ public:
 
 	// tolua_end
 	
-	BLOCKENTITY_PROTODEF(cJukeboxEntity);
+	BLOCKENTITY_PROTODEF(cJukeboxEntity)
 	
 	cJukeboxEntity(int a_BlockX, int a_BlockY, int a_BlockZ, cWorld * a_World);
 	virtual ~cJukeboxEntity();
diff --git a/src/BlockEntities/MobHeadEntity.h b/src/BlockEntities/MobHeadEntity.h
index 7132ef558..7f08c5ab2 100644
--- a/src/BlockEntities/MobHeadEntity.h
+++ b/src/BlockEntities/MobHeadEntity.h
@@ -14,14 +14,6 @@
 
 
 
-namespace Json
-{
-	class Value;
-}
-
-
-
-
 
 // tolua_begin
 
@@ -34,29 +26,29 @@ public:
 
 	// tolua_end
 	
-	BLOCKENTITY_PROTODEF(cMobHeadEntity);
+	BLOCKENTITY_PROTODEF(cMobHeadEntity)
 	
 	/** Creates a new mob head entity at the specified block coords. a_World may be nullptr */
 	cMobHeadEntity(int a_BlockX, int a_BlockY, int a_BlockZ, cWorld * a_World);
 
 	// tolua_begin
 	
-	/** Set the Type */
+	/** Set the type of the mob head */
 	void SetType(const eMobHeadType & a_SkullType);
 	
-	/** Set the Rotation */
+	/** Set the rotation of the mob head */
 	void SetRotation(eMobHeadRotation a_Rotation);
 	
-	/** Set the Player Name for Mobheads with Player type */
+	/** Set the player name for mob heads with player type */
 	void SetOwner(const AString & a_Owner);
 	
-	/** Get the Type */
+	/** Returns the type of the mob head */
 	eMobHeadType GetType(void) const { return m_Type; }
 	
-	/** Get the Rotation */
+	/** Returns the rotation of the mob head */
 	eMobHeadRotation GetRotation(void) const { return m_Rotation; }
 	
-	/** Get the setted Player Name */
+	/** Returns the player name of the mob head */
 	AString GetOwner(void) const { return m_Owner; }
 	
 	// tolua_end
diff --git a/src/BlockEntities/MobSpawnerEntity.cpp b/src/BlockEntities/MobSpawnerEntity.cpp
new file mode 100644
index 000000000..5edee888a
--- /dev/null
+++ b/src/BlockEntities/MobSpawnerEntity.cpp
@@ -0,0 +1,290 @@
+
+#include "Globals.h"  // NOTE: MSVC stupidness requires this to be the same across all modules
+
+#include "MobSpawnerEntity.h"
+
+#include "../World.h"
+#include "../FastRandom.h"
+#include "../MobSpawner.h"
+#include "../Items/ItemSpawnEgg.h"
+
+
+
+
+
+cMobSpawnerEntity::cMobSpawnerEntity(int a_BlockX, int a_BlockY, int a_BlockZ, cWorld * a_World)
+	: super(E_BLOCK_MOB_SPAWNER, a_BlockX, a_BlockY, a_BlockZ, a_World)
+	, m_Entity(mtPig)
+	, m_SpawnDelay(100)
+	, m_IsActive(false)
+{
+}
+
+
+
+
+
+void cMobSpawnerEntity::SendTo(cClientHandle & a_Client)
+{
+	a_Client.SendUpdateBlockEntity(*this);
+}
+
+
+
+
+
+void cMobSpawnerEntity::UsedBy(cPlayer * a_Player)
+{
+	if (a_Player->GetEquippedItem().m_ItemType == E_ITEM_SPAWN_EGG)
+	{
+		eMonsterType MonsterType = cItemSpawnEggHandler::ItemDamageToMonsterType(a_Player->GetEquippedItem().m_ItemDamage);
+		if (MonsterType == eMonsterType::mtInvalidType)
+		{
+			return;
+		}
+
+		m_Entity = MonsterType;
+		ResetTimer();
+		if (!a_Player->IsGameModeCreative())
+		{
+			a_Player->GetInventory().RemoveOneEquippedItem();
+		}
+		LOGD("Changed monster spawner at {%d, %d, %d} to type %s.", GetPosX(), GetPosY(), GetPosZ(), cMonster::MobTypeToString(MonsterType).c_str());
+	}
+}
+
+
+
+
+
+void cMobSpawnerEntity::UpdateActiveState(void)
+{
+	if (GetNearbyPlayersNum() > 0)
+	{
+		m_IsActive = true;
+	}
+	else
+	{
+		m_IsActive = false;
+	}
+}
+
+
+
+
+
+bool cMobSpawnerEntity::Tick(float a_Dt, cChunk & a_Chunk)
+{
+	// Update the active flag every 5 seconds
+	if ((m_World->GetWorldAge() % 100) == 0)
+	{
+		UpdateActiveState();
+	}
+
+	if (!m_IsActive)
+	{
+		return false;
+	}
+
+	if (m_SpawnDelay <= 0)
+	{
+		SpawnEntity();
+		return true;
+	}
+	else
+	{
+		m_SpawnDelay--;
+	}
+	return false;
+}
+
+
+
+
+
+void cMobSpawnerEntity::ResetTimer(void)
+{
+	m_SpawnDelay = static_cast<short>(200 + m_World->GetTickRandomNumber(600));
+	m_World->BroadcastBlockEntity(m_PosX, m_PosY, m_PosZ);
+}
+
+
+
+
+
+void cMobSpawnerEntity::SpawnEntity(void)
+{
+	int NearbyEntities = GetNearbyMonsterNum(m_Entity);
+	if (NearbyEntities >= 6)
+	{
+		ResetTimer();
+		return;
+	}
+
+	class cCallback : public cChunkCallback
+	{
+	public:
+		cCallback(int a_RelX, int a_RelY, int a_RelZ, eMonsterType a_MobType, int a_NearbyEntitiesNum) :
+			m_RelX(a_RelX),
+			m_RelY(a_RelY),
+			m_RelZ(a_RelZ),
+			m_MobType(a_MobType),
+			m_NearbyEntitiesNum(a_NearbyEntitiesNum)
+		{
+		}
+
+		virtual bool Item(cChunk * a_Chunk)
+		{
+			cFastRandom Random;
+
+			bool EntitiesSpawned = false;
+			for (size_t i = 0; i < 4; i++)
+			{
+				if (m_NearbyEntitiesNum >= 6)
+				{
+					break;
+				}
+
+				int RelX = (int) (m_RelX + (double)(Random.NextFloat() - Random.NextFloat()) * 4.0);
+				int RelY = m_RelY + Random.NextInt(3) - 1;
+				int RelZ = (int) (m_RelZ + (double)(Random.NextFloat() - Random.NextFloat()) * 4.0);
+
+				cChunk * Chunk = a_Chunk->GetRelNeighborChunkAdjustCoords(RelX, RelZ);
+				if ((Chunk == NULL) || !Chunk->IsValid())
+				{
+					continue;
+				}
+				EMCSBiome Biome = Chunk->GetBiomeAt(RelX, RelZ);
+
+				if (cMobSpawner::CanSpawnHere(Chunk, RelX, RelY, RelZ, m_MobType, Biome))
+				{
+					double PosX = Chunk->GetPosX() * cChunkDef::Width + RelX;
+					double PosZ = Chunk->GetPosZ() * cChunkDef::Width + RelZ;
+
+					cMonster * Monster = cMonster::NewMonsterFromType(m_MobType);
+					if (Monster == NULL)
+					{
+						continue;
+					}
+
+					Monster->SetPosition(PosX, RelY, PosZ);
+					Monster->SetYaw(Random.NextFloat() * 360.0f);
+					if (Chunk->GetWorld()->SpawnMobFinalize(Monster) != mtInvalidType)
+					{
+						EntitiesSpawned = true;
+						Chunk->BroadcastSoundParticleEffect(2004, (int)(PosX * 8.0), (int)(RelY * 8.0), (int)(PosZ * 8.0), 0);
+						m_NearbyEntitiesNum++;
+					}
+				}
+			}
+			return EntitiesSpawned;
+		}
+	protected:
+		int m_RelX, m_RelY, m_RelZ;
+		eMonsterType m_MobType;
+		int m_NearbyEntitiesNum;
+	} Callback(m_RelX, m_PosY, m_RelZ, m_Entity, NearbyEntities);
+
+	if (m_World->DoWithChunk(GetChunkX(), GetChunkZ(), Callback))
+	{
+		ResetTimer();
+	}
+}
+
+
+
+
+
+int cMobSpawnerEntity::GetNearbyPlayersNum(void)
+{
+	Vector3d SpawnerPos(m_PosX + 0.5, m_PosY + 0.5, m_PosZ + 0.5);
+	int NumPlayers = 0;
+
+	class cCallback : public cChunkDataCallback
+	{
+	public:
+		cCallback(Vector3d a_SpawnerPos, int & a_NumPlayers) :
+			m_SpawnerPos(a_SpawnerPos),
+			m_NumPlayers(a_NumPlayers)
+		{
+		}
+
+		virtual void Entity(cEntity * a_Entity) override
+		{
+			if (!a_Entity->IsPlayer())
+			{
+				return;
+			}
+
+			if ((m_SpawnerPos - a_Entity->GetPosition()).Length() <= 16)
+			{
+				m_NumPlayers++;
+			}
+		}
+
+	protected:
+		Vector3d m_SpawnerPos;
+		int & m_NumPlayers;
+	} Callback(SpawnerPos, NumPlayers);
+
+	int ChunkX = GetChunkX();
+	int ChunkZ = GetChunkZ();
+	m_World->ForEachChunkInRect(ChunkX - 1, ChunkX + 1, ChunkZ - 1, ChunkZ + 1, Callback);
+
+	return NumPlayers;
+}
+
+
+
+
+
+int cMobSpawnerEntity::GetNearbyMonsterNum(eMonsterType a_EntityType)
+{
+	Vector3d SpawnerPos(m_PosX + 0.5, m_PosY + 0.5, m_PosZ + 0.5);
+	int NumEntities = 0;
+
+	class cCallback : public cChunkDataCallback
+	{
+	public:
+		cCallback(Vector3d a_SpawnerPos, eMonsterType a_EntityType, int & a_NumEntities) :
+			m_SpawnerPos(a_SpawnerPos),
+			m_EntityType(a_EntityType),
+			m_NumEntities(a_NumEntities)
+		{
+		}
+
+		virtual void Entity(cEntity * a_Entity) override
+		{
+			if (!a_Entity->IsMob())
+			{
+				return;
+			}
+
+			cMonster * Mob = (cMonster *)a_Entity;
+			if (Mob->GetMobType() != m_EntityType)
+			{
+				return;
+			}
+
+			if ((Diff(m_SpawnerPos.x, a_Entity->GetPosX()) <= 8.0) && (Diff(m_SpawnerPos.y, a_Entity->GetPosY()) <= 4.0) && (Diff(m_SpawnerPos.z, a_Entity->GetPosZ()) <= 8.0))
+			{
+				m_NumEntities++;
+			}
+		}
+
+	protected:
+		Vector3d m_SpawnerPos;
+		eMonsterType m_EntityType;
+		int & m_NumEntities;
+	} Callback(SpawnerPos, a_EntityType, NumEntities);
+
+	int ChunkX = GetChunkX();
+	int ChunkZ = GetChunkZ();
+	m_World->ForEachChunkInRect(ChunkX - 1, ChunkX + 1, ChunkZ - 1, ChunkZ + 1, Callback);
+
+	return NumEntities;
+}
+
+
+
+
diff --git a/src/BlockEntities/MobSpawnerEntity.h b/src/BlockEntities/MobSpawnerEntity.h
new file mode 100644
index 000000000..594b5301e
--- /dev/null
+++ b/src/BlockEntities/MobSpawnerEntity.h
@@ -0,0 +1,78 @@
+// MobSpawnerEntity.h
+
+// Declares the cMobSpawnerEntity class representing a single mob spawner in the world
+
+
+
+
+
+#pragma once
+
+#include "BlockEntity.h"
+#include "../Entities/Player.h"
+
+
+
+
+
+// tolua_begin
+
+class cMobSpawnerEntity :
+	public cBlockEntity
+{
+	typedef cBlockEntity super;
+public:
+
+	// tolua_end
+	
+	cMobSpawnerEntity(int a_BlockX, int a_BlockY, int a_BlockZ, cWorld * a_World);
+
+	virtual void SendTo(cClientHandle & a_Client) override;
+	virtual void UsedBy(cPlayer * a_Player) override;
+	virtual bool Tick(float a_Dt, cChunk & a_Chunk) override;
+
+	// tolua_begin
+
+	/** Upate the active flag from the mob spawner. This function will called every 5 seconds from the Tick() function. */
+	void UpdateActiveState(void);
+
+	/** Sets the spawn delay to a new random value. */
+	void ResetTimer(void);
+
+	/** Spawns the entity. This function automaticly change the spawn delay! */
+	void SpawnEntity(void);
+
+	/** Returns the entity type that will be spawn by this mob spawner. */
+	eMonsterType GetEntity(void) const { return m_Entity; }
+
+	/** Sets the entity type who will be spawn by this mob spawner. */
+	void SetEntity(eMonsterType a_EntityType) { m_Entity = a_EntityType; }
+
+	/** Returns the spawn delay. This is the tick delay that is needed to spawn new monsters. */
+	short GetSpawnDelay(void) const { return m_SpawnDelay; }
+
+	/** Sets the spawn delay. */
+	void SetSpawnDelay(short a_Delay) { m_SpawnDelay = a_Delay; }
+
+	/** Returns the amount of the nearby players in a 16-block radius. */
+	int GetNearbyPlayersNum(void);
+
+	/** Returns the amount of this monster type in a 8-block radius (Y: 4-block radius). */
+	int GetNearbyMonsterNum(eMonsterType a_EntityType);
+
+	// tolua_end
+
+	static const char * GetClassStatic(void) { return "cMobSpawnerEntity"; }
+
+private:
+	/** The entity to spawn. */
+	eMonsterType m_Entity;
+
+	short m_SpawnDelay;
+
+	bool m_IsActive;
+} ;  // tolua_end
+
+
+
+
diff --git a/src/BlockEntities/NoteEntity.h b/src/BlockEntities/NoteEntity.h
index fc5f27d07..d3f85e9d2 100644
--- a/src/BlockEntities/NoteEntity.h
+++ b/src/BlockEntities/NoteEntity.h
@@ -5,12 +5,6 @@
 #include "RedstonePoweredEntity.h"
 
 
-namespace Json
-{
-	class Value;
-}
-
-
 
 
 
@@ -40,7 +34,7 @@ public:
 
 	// tolua_end
 
-	BLOCKENTITY_PROTODEF(cNoteEntity);
+	BLOCKENTITY_PROTODEF(cNoteEntity)
 	
 	/// Creates a new note entity. a_World may be nullptr
 	cNoteEntity(int a_X, int a_Y, int a_Z, cWorld * a_World);
diff --git a/src/BlockEntities/SignEntity.h b/src/BlockEntities/SignEntity.h
index 52baa486d..9480537ed 100644
--- a/src/BlockEntities/SignEntity.h
+++ b/src/BlockEntities/SignEntity.h
@@ -14,15 +14,6 @@
 
 
 
-namespace Json
-{
-	class Value;
-}
-
-
-
-
-
 // tolua_begin
 
 class cSignEntity :
@@ -34,7 +25,7 @@ public:
 
 	// tolua_end
 	
-	BLOCKENTITY_PROTODEF(cSignEntity);
+	BLOCKENTITY_PROTODEF(cSignEntity)
 	
 	/// Creates a new empty sign entity at the specified block coords and block type (wall or standing). a_World may be nullptr
 	cSignEntity(BLOCKTYPE a_BlockType, int a_X, int a_Y, int a_Z, cWorld * a_World);
diff --git a/src/BlockID.cpp b/src/BlockID.cpp
index c0f3193bb..06f4232d3 100644
--- a/src/BlockID.cpp
+++ b/src/BlockID.cpp
@@ -200,7 +200,7 @@ public:
 
 
 
-BLOCKTYPE BlockStringToType(const AString & a_BlockTypeString)
+int BlockStringToType(const AString & a_BlockTypeString)
 {
 	int res = atoi(a_BlockTypeString.c_str());
 	if ((res != 0) || (a_BlockTypeString.compare("0") == 0))
@@ -217,7 +217,12 @@ BLOCKTYPE BlockStringToType(const AString & a_BlockTypeString)
 
 bool StringToItem(const AString & a_ItemTypeString, cItem & a_Item)
 {
-	return gsBlockIDMap.ResolveItem(TrimString(a_ItemTypeString), a_Item);
+	AString ItemName = TrimString(a_ItemTypeString);
+	if (ItemName.substr(0, 10) == "minecraft:")
+	{
+		ItemName = ItemName.substr(10);
+	}
+	return gsBlockIDMap.ResolveItem(ItemName, a_Item);
 }
 
 
diff --git a/src/BlockID.h b/src/BlockID.h
index bb06722d2..8f2cee02e 100644
--- a/src/BlockID.h
+++ b/src/BlockID.h
@@ -1,7 +1,13 @@
 #pragma once
 
+// The following hackery is to allow typed C++ enum for C++ code, yet have ToLua process the values.
+// ToLua doesn't understand typed enums, so we use preprocessor to hide it from ToLua.
+
+enum ENUM_BLOCK_ID : BLOCKTYPE
+#if 0
+enum ENUM_BLOCK_ID  // tolua_export
+#endif
 // tolua_begin
-enum ENUM_BLOCK_ID
 {
 	E_BLOCK_AIR = 0,
 	E_BLOCK_STONE = 1,
@@ -221,6 +227,10 @@ enum ENUM_BLOCK_ID
 };
 // tolua_end
 
+
+
+
+
 // tolua_begin
 enum ENUM_ITEM_ID
 {
@@ -1086,7 +1096,7 @@ class cIniFile;
 // tolua_begin
 
 /// Translates a blocktype string into blocktype. Takes either a number or an items.ini alias as input. Returns -1 on failure.
-extern BLOCKTYPE BlockStringToType(const AString & a_BlockTypeString);
+extern int BlockStringToType(const AString & a_BlockTypeString);
 
 /// Translates an itemtype string into an item. Takes either a number, number^number, number:number or an items.ini alias as input. Returns true if successful.
 extern bool StringToItem(const AString & a_ItemTypeString, cItem & a_Item);
diff --git a/src/Blocks/BlockBed.h b/src/Blocks/BlockBed.h
index 9fd45644b..a8b5be899 100644
--- a/src/Blocks/BlockBed.h
+++ b/src/Blocks/BlockBed.h
@@ -52,7 +52,10 @@ public:
 	static NIBBLETYPE RotationToMetaData(double a_Rotation)
 	{
 		a_Rotation += 180 + (180 / 4);  // So its not aligned with axis
-		if (a_Rotation > 360) a_Rotation -= 360;
+		if (a_Rotation > 360)
+		{
+			a_Rotation -= 360;
+		}
 
 		a_Rotation = (a_Rotation / 360) * 4;
 
diff --git a/src/Blocks/BlockDoor.cpp b/src/Blocks/BlockDoor.cpp
index 96345a2df..90b7b15c2 100644
--- a/src/Blocks/BlockDoor.cpp
+++ b/src/Blocks/BlockDoor.cpp
@@ -145,7 +145,10 @@ NIBBLETYPE cBlockDoorHandler::MetaMirrorXY(NIBBLETYPE a_Meta)
 	// in only the bottom tile while the hinge position is in the top tile.  This function only operates on one tile at a time,
 	// so the function can only see either the hinge position or orientation, but not both, at any given time.  The class itself
 	// needs extra datamembers.
-	if (a_Meta & 0x08) return a_Meta;
+	if (a_Meta & 0x08)
+	{
+		return a_Meta;
+	}
 
 	// Holds open/closed meta data. 0x0C == 1100.
 	NIBBLETYPE OtherMeta = a_Meta & 0x0C;
@@ -173,7 +176,10 @@ NIBBLETYPE cBlockDoorHandler::MetaMirrorYZ(NIBBLETYPE a_Meta)
 	// so the function can only see either the hinge position or orientation, but not both, at any given time.The class itself
 	// needs extra datamembers.
 
-	if (a_Meta & 0x08) return a_Meta;
+	if (a_Meta & 0x08)
+	{
+		return a_Meta;
+	}
 
 	// Holds open/closed meta data. 0x0C == 1100.
 	NIBBLETYPE OtherMeta = a_Meta & 0x0C;
diff --git a/src/Blocks/BlockMobSpawner.h b/src/Blocks/BlockMobSpawner.h
index a51fbaafc..d5e7c273f 100644
--- a/src/Blocks/BlockMobSpawner.h
+++ b/src/Blocks/BlockMobSpawner.h
@@ -19,6 +19,18 @@ public:
 	}
 
 
+	virtual void OnUse(cChunkInterface & a_ChunkInterface, cWorldInterface & a_WorldInterface, cPlayer *a_Player, int a_BlockX, int a_BlockY, int a_BlockZ, eBlockFace a_BlockFace, int a_CursorX, int a_CursorY, int a_CursorZ) override
+	{
+		a_ChunkInterface.UseBlockEntity(a_Player, a_BlockX, a_BlockY, a_BlockZ);
+	}
+
+
+	virtual bool IsUseable() override
+	{
+		return true;
+	}
+
+
 	virtual void ConvertToPickups(cItems & a_Pickups, NIBBLETYPE a_BlockMeta) override
 	{
 		// No pickups
diff --git a/src/Blocks/BlockRail.h b/src/Blocks/BlockRail.h
index 533a6e900..02fe3aa95 100644
--- a/src/Blocks/BlockRail.h
+++ b/src/Blocks/BlockRail.h
@@ -151,13 +151,21 @@ public:
 		Neighbors[6] = (IsUnstable(a_ChunkInterface, a_BlockX, a_BlockY + 1, a_BlockZ - 1) || !IsNotConnected(a_ChunkInterface, a_BlockX, a_BlockY + 1, a_BlockZ, BLOCK_FACE_NORTH, E_PURE_NONE));
 		Neighbors[7] = (IsUnstable(a_ChunkInterface, a_BlockX, a_BlockY + 1, a_BlockZ + 1) || !IsNotConnected(a_ChunkInterface, a_BlockX, a_BlockY + 1, a_BlockZ, BLOCK_FACE_SOUTH, E_PURE_NONE));
 		if (IsUnstable(a_ChunkInterface, a_BlockX + 1, a_BlockY - 1, a_BlockZ) || !IsNotConnected(a_ChunkInterface, a_BlockX, a_BlockY - 1, a_BlockZ, BLOCK_FACE_EAST))
+		{
 			Neighbors[0] = true;
+		}
 		if (IsUnstable(a_ChunkInterface, a_BlockX - 1, a_BlockY - 1, a_BlockZ) || !IsNotConnected(a_ChunkInterface, a_BlockX, a_BlockY - 1, a_BlockZ, BLOCK_FACE_WEST))
+		{
 			Neighbors[1] = true;
+		}
 		if (IsUnstable(a_ChunkInterface, a_BlockX, a_BlockY - 1, a_BlockZ - 1) || !IsNotConnected(a_ChunkInterface, a_BlockX, a_BlockY - 1, a_BlockZ, BLOCK_FACE_NORTH))
+		{
 			Neighbors[2] = true;
+		}
 		if (IsUnstable(a_ChunkInterface, a_BlockX, a_BlockY - 1, a_BlockZ + 1) || !IsNotConnected(a_ChunkInterface, a_BlockX, a_BlockY - 1, a_BlockZ, BLOCK_FACE_SOUTH))
+		{
 			Neighbors[3] = true;
+		}
 		for (int i = 0; i < 8; i++)
 		{
 			if (Neighbors[i])
@@ -167,12 +175,30 @@ public:
 		}
 		if (RailsCnt == 1)
 		{
-			if (Neighbors[7]) return E_META_RAIL_ASCEND_ZP;
-			else if (Neighbors[6]) return E_META_RAIL_ASCEND_ZM;
-			else if (Neighbors[5]) return E_META_RAIL_ASCEND_XM;
-			else if (Neighbors[4]) return E_META_RAIL_ASCEND_XP;
-			else if (Neighbors[0] || Neighbors[1]) return E_META_RAIL_XM_XP;
-			else if (Neighbors[2] || Neighbors[3]) return E_META_RAIL_ZM_ZP;
+			if (Neighbors[7])
+			{
+				return E_META_RAIL_ASCEND_ZP;
+			}
+			else if (Neighbors[6])
+			{
+				return E_META_RAIL_ASCEND_ZM;
+			}
+			else if (Neighbors[5])
+			{
+				return E_META_RAIL_ASCEND_XM;
+			}
+			else if (Neighbors[4])
+			{
+				return E_META_RAIL_ASCEND_XP;
+			}
+			else if (Neighbors[0] || Neighbors[1])
+			{
+				return E_META_RAIL_XM_XP;
+			}
+			else if (Neighbors[2] || Neighbors[3])
+			{
+				return E_META_RAIL_ZM_ZP;
+			}
 			ASSERT(!"Weird neighbor count");
 			return Meta;
 		}
@@ -185,16 +211,46 @@ public:
 		}
 		if (RailsCnt > 1)
 		{
-			if      (Neighbors[3] && Neighbors[0] && CanThisRailCurve()) return E_META_RAIL_CURVED_ZP_XP;
-			else if (Neighbors[3] && Neighbors[1] && CanThisRailCurve()) return E_META_RAIL_CURVED_ZP_XM;
-			else if (Neighbors[2] && Neighbors[0] && CanThisRailCurve()) return E_META_RAIL_CURVED_ZM_XP;
-			else if (Neighbors[2] && Neighbors[1] && CanThisRailCurve()) return E_META_RAIL_CURVED_ZM_XM;
-			else if (Neighbors[7] && Neighbors[2]) return E_META_RAIL_ASCEND_ZP;
-			else if (Neighbors[3] && Neighbors[6]) return E_META_RAIL_ASCEND_ZM;
-			else if (Neighbors[5] && Neighbors[0]) return E_META_RAIL_ASCEND_XM;
-			else if (Neighbors[4] && Neighbors[1]) return E_META_RAIL_ASCEND_XP;
-			else if (Neighbors[0] && Neighbors[1]) return E_META_RAIL_XM_XP;
-			else if (Neighbors[2] && Neighbors[3]) return E_META_RAIL_ZM_ZP;
+			if (Neighbors[3] && Neighbors[0] && CanThisRailCurve())
+			{
+				return E_META_RAIL_CURVED_ZP_XP;
+			}
+			else if (Neighbors[3] && Neighbors[1] && CanThisRailCurve())
+			{
+				return E_META_RAIL_CURVED_ZP_XM;
+			}
+			else if (Neighbors[2] && Neighbors[0] && CanThisRailCurve())
+			{
+				return E_META_RAIL_CURVED_ZM_XP;
+			}
+			else if (Neighbors[2] && Neighbors[1] && CanThisRailCurve())
+			{
+				return E_META_RAIL_CURVED_ZM_XM;
+			}
+			else if (Neighbors[7] && Neighbors[2])
+			{
+				return E_META_RAIL_ASCEND_ZP;
+			}
+			else if (Neighbors[3] && Neighbors[6])
+			{
+				return E_META_RAIL_ASCEND_ZM;
+			}
+			else if (Neighbors[5] && Neighbors[0])
+			{
+				return E_META_RAIL_ASCEND_XM;
+			}
+			else if (Neighbors[4] && Neighbors[1])
+			{
+				return E_META_RAIL_ASCEND_XP;
+			}
+			else if (Neighbors[0] && Neighbors[1])
+			{
+				return E_META_RAIL_XM_XP;
+			}
+			else if (Neighbors[2] && Neighbors[3])
+			{
+				return E_META_RAIL_ZM_ZP;
+			}
 
 			if (CanThisRailCurve())
 			{
diff --git a/src/ByteBuffer.cpp b/src/ByteBuffer.cpp
index 012105ca1..080176dcd 100644
--- a/src/ByteBuffer.cpp
+++ b/src/ByteBuffer.cpp
@@ -111,26 +111,36 @@ public:
 
 #ifdef _DEBUG
 
-/// Simple RAII class that uses one internal unsigned long for checking if two threads are using an object simultanously
-class cSingleThreadAccessChecker
-{
-public:
-	cSingleThreadAccessChecker(unsigned long * a_ThreadID) :
-		m_ThreadID(a_ThreadID)
+	/** Simple RAII class that is used for checking that no two threads are using an object simultanously.
+	It requires the monitored object to provide the storage for a thread ID.
+	It uses that storage to check if the thread ID of consecutive calls is the same all the time. */
+	class cSingleThreadAccessChecker
 	{
-		ASSERT((*a_ThreadID == 0) || (*a_ThreadID == cIsThread::GetCurrentID()));
-	}
-	
-	~cSingleThreadAccessChecker()
-	{
-		*m_ThreadID = 0;
-	}
-	
-protected:
-	unsigned long * m_ThreadID;
-} ;
+	public:
+		cSingleThreadAccessChecker(std::thread::id * a_ThreadID) :
+			m_ThreadID(a_ThreadID)
+		{
+			ASSERT(
+				(*a_ThreadID == std::this_thread::get_id()) ||  // Either the object is used by current thread...
+				(*a_ThreadID == std::thread::id())              // ... or by no thread at all
+			);
+
+			// Mark as being used by this thread:
+			*m_ThreadID = std::this_thread::get_id();
+		}
+
+		~cSingleThreadAccessChecker()
+		{
+			// Mark as not being used by any thread:
+			*m_ThreadID = std::thread::id();
+		}
+
+	protected:
+		/** Points to the storage used for ID of the thread using the object. */
+		std::thread::id * m_ThreadID;
+	};
 
-#define CHECK_THREAD cSingleThreadAccessChecker Checker(const_cast<unsigned long *>(&m_ThreadID))
+	#define CHECK_THREAD cSingleThreadAccessChecker Checker(&m_ThreadID);
 
 #else
 	#define CHECK_THREAD
@@ -146,9 +156,6 @@ protected:
 cByteBuffer::cByteBuffer(size_t a_BufferSize) :
 	m_Buffer(new char[a_BufferSize + 1]),
 	m_BufferSize(a_BufferSize + 1),
-	#ifdef _DEBUG
-	m_ThreadID(0),
-	#endif  // _DEBUG
 	m_DataStart(0),
 	m_WritePos(0),
 	m_ReadPos(0)
@@ -174,7 +181,7 @@ cByteBuffer::~cByteBuffer()
 
 bool cByteBuffer::Write(const void * a_Bytes, size_t a_Count)
 {
-	CHECK_THREAD;
+	CHECK_THREAD
 	CheckValid();
 
 	// Store the current free space for a check after writing:
@@ -221,7 +228,7 @@ bool cByteBuffer::Write(const void * a_Bytes, size_t a_Count)
 
 size_t cByteBuffer::GetFreeSpace(void) const
 {
-	CHECK_THREAD;
+	CHECK_THREAD
 	CheckValid();
 	if (m_WritePos >= m_DataStart)
 	{
@@ -243,7 +250,7 @@ size_t cByteBuffer::GetFreeSpace(void) const
 /// Returns the number of bytes that are currently in the ringbuffer. Note GetReadableBytes()
 size_t cByteBuffer::GetUsedSpace(void) const
 {
-	CHECK_THREAD;
+	CHECK_THREAD
 	CheckValid();
 	ASSERT(m_BufferSize >= GetFreeSpace());
 	ASSERT((m_BufferSize - GetFreeSpace()) >= 1);
@@ -257,7 +264,7 @@ size_t cByteBuffer::GetUsedSpace(void) const
 /// Returns the number of bytes that are currently available for reading (may be less than UsedSpace due to some data having been read already)
 size_t cByteBuffer::GetReadableSpace(void) const
 {
-	CHECK_THREAD;
+	CHECK_THREAD
 	CheckValid();
 	if (m_ReadPos > m_WritePos)
 	{
@@ -276,7 +283,7 @@ size_t cByteBuffer::GetReadableSpace(void) const
 
 bool cByteBuffer::CanReadBytes(size_t a_Count) const
 {
-	CHECK_THREAD;
+	CHECK_THREAD
 	CheckValid();
 	return (a_Count <= GetReadableSpace());
 }
@@ -287,7 +294,7 @@ bool cByteBuffer::CanReadBytes(size_t a_Count) const
 
 bool cByteBuffer::CanWriteBytes(size_t a_Count) const
 {
-	CHECK_THREAD;
+	CHECK_THREAD
 	CheckValid();
 	return (a_Count <= GetFreeSpace());
 }
@@ -298,7 +305,7 @@ bool cByteBuffer::CanWriteBytes(size_t a_Count) const
 
 bool cByteBuffer::ReadChar(char & a_Value)
 {
-	CHECK_THREAD;
+	CHECK_THREAD
 	CheckValid();
 	NEEDBYTES(1);
 	ReadBuf(&a_Value, 1);
@@ -311,7 +318,7 @@ bool cByteBuffer::ReadChar(char & a_Value)
 
 bool cByteBuffer::ReadByte(unsigned char & a_Value)
 {
-	CHECK_THREAD;
+	CHECK_THREAD
 	CheckValid();
 	NEEDBYTES(1);
 	ReadBuf(&a_Value, 1);
@@ -324,7 +331,7 @@ bool cByteBuffer::ReadByte(unsigned char & a_Value)
 
 bool cByteBuffer::ReadBEShort(short & a_Value)
 {
-	CHECK_THREAD;
+	CHECK_THREAD
 	CheckValid();
 	NEEDBYTES(2);
 	ReadBuf(&a_Value, 2);
@@ -338,7 +345,7 @@ bool cByteBuffer::ReadBEShort(short & a_Value)
 
 bool cByteBuffer::ReadBEInt(int & a_Value)
 {
-	CHECK_THREAD;
+	CHECK_THREAD
 	CheckValid();
 	NEEDBYTES(4);
 	ReadBuf(&a_Value, 4);
@@ -352,7 +359,7 @@ bool cByteBuffer::ReadBEInt(int & a_Value)
 
 bool cByteBuffer::ReadBEInt64(Int64 & a_Value)
 {
-	CHECK_THREAD;
+	CHECK_THREAD
 	CheckValid();
 	NEEDBYTES(8);
 	ReadBuf(&a_Value, 8);
@@ -366,7 +373,7 @@ bool cByteBuffer::ReadBEInt64(Int64 & a_Value)
 
 bool cByteBuffer::ReadBEFloat(float & a_Value)
 {
-	CHECK_THREAD;
+	CHECK_THREAD
 	CheckValid();
 	NEEDBYTES(4);
 	ReadBuf(&a_Value, 4);
@@ -380,7 +387,7 @@ bool cByteBuffer::ReadBEFloat(float & a_Value)
 
 bool cByteBuffer::ReadBEDouble(double & a_Value)
 {
-	CHECK_THREAD;
+	CHECK_THREAD
 	CheckValid();
 	NEEDBYTES(8);
 	ReadBuf(&a_Value, 8);
@@ -394,7 +401,7 @@ bool cByteBuffer::ReadBEDouble(double & a_Value)
 
 bool cByteBuffer::ReadBool(bool & a_Value)
 {
-	CHECK_THREAD;
+	CHECK_THREAD
 	CheckValid();
 	NEEDBYTES(1);
 	char Value = 0;
@@ -409,7 +416,7 @@ bool cByteBuffer::ReadBool(bool & a_Value)
 
 bool cByteBuffer::ReadBEUTF16String16(AString & a_Value)
 {
-	CHECK_THREAD;
+	CHECK_THREAD
 	CheckValid();
 	short Length;
 	if (!ReadBEShort(Length))
@@ -430,7 +437,7 @@ bool cByteBuffer::ReadBEUTF16String16(AString & a_Value)
 
 bool cByteBuffer::ReadVarInt(UInt32 & a_Value)
 {
-	CHECK_THREAD;
+	CHECK_THREAD
 	CheckValid();
 	UInt32 Value = 0;
 	int Shift = 0;
@@ -452,7 +459,7 @@ bool cByteBuffer::ReadVarInt(UInt32 & a_Value)
 
 bool cByteBuffer::ReadVarUTF8String(AString & a_Value)
 {
-	CHECK_THREAD;
+	CHECK_THREAD
 	CheckValid();
 	UInt32 Size = 0;
 	if (!ReadVarInt(Size))
@@ -472,7 +479,7 @@ bool cByteBuffer::ReadVarUTF8String(AString & a_Value)
 
 bool cByteBuffer::ReadLEInt(int & a_Value)
 {
-	CHECK_THREAD;
+	CHECK_THREAD
 	CheckValid();
 	NEEDBYTES(4);
 	ReadBuf(&a_Value, 4);
@@ -491,6 +498,7 @@ bool cByteBuffer::ReadLEInt(int & a_Value)
 
 bool cByteBuffer::ReadPosition(int & a_BlockX, int & a_BlockY, int & a_BlockZ)
 {
+	CHECK_THREAD
 	Int64 Value;
 	if (!ReadBEInt64(Value))
 	{
@@ -515,7 +523,7 @@ bool cByteBuffer::ReadPosition(int & a_BlockX, int & a_BlockY, int & a_BlockZ)
 
 bool cByteBuffer::WriteChar(char a_Value)
 {
-	CHECK_THREAD;
+	CHECK_THREAD
 	CheckValid();
 	PUTBYTES(1);
 	return WriteBuf(&a_Value, 1);
@@ -527,7 +535,7 @@ bool cByteBuffer::WriteChar(char a_Value)
 
 bool cByteBuffer::WriteByte(unsigned char a_Value)
 {
-	CHECK_THREAD;
+	CHECK_THREAD
 	CheckValid();
 	PUTBYTES(1);
 	return WriteBuf(&a_Value, 1);
@@ -539,7 +547,7 @@ bool cByteBuffer::WriteByte(unsigned char a_Value)
 
 bool cByteBuffer::WriteBEShort(short a_Value)
 {
-	CHECK_THREAD;
+	CHECK_THREAD
 	CheckValid();
 	PUTBYTES(2);
 	u_short Converted = htons((u_short)a_Value);
@@ -552,7 +560,7 @@ bool cByteBuffer::WriteBEShort(short a_Value)
 
 bool cByteBuffer::WriteBEUShort(unsigned short a_Value)
 {
-	CHECK_THREAD;
+	CHECK_THREAD
 	CheckValid();
 	PUTBYTES(2);
 	u_short Converted = htons((u_short)a_Value);
@@ -565,7 +573,7 @@ bool cByteBuffer::WriteBEUShort(unsigned short a_Value)
 
 bool cByteBuffer::WriteBEInt(int a_Value)
 {
-	CHECK_THREAD;
+	CHECK_THREAD
 	CheckValid();
 	PUTBYTES(4);
 	UInt32 Converted = HostToNetwork4(&a_Value);
@@ -578,7 +586,7 @@ bool cByteBuffer::WriteBEInt(int a_Value)
 
 bool cByteBuffer::WriteBEInt64(Int64 a_Value)
 {
-	CHECK_THREAD;
+	CHECK_THREAD
 	CheckValid();
 	PUTBYTES(8);
 	UInt64 Converted = HostToNetwork8(&a_Value);
@@ -591,7 +599,7 @@ bool cByteBuffer::WriteBEInt64(Int64 a_Value)
 
 bool cByteBuffer::WriteBEFloat(float a_Value)
 {
-	CHECK_THREAD;
+	CHECK_THREAD
 	CheckValid();
 	PUTBYTES(4);
 	UInt32 Converted = HostToNetwork4(&a_Value);
@@ -604,7 +612,7 @@ bool cByteBuffer::WriteBEFloat(float a_Value)
 
 bool cByteBuffer::WriteBEDouble(double a_Value)
 {
-	CHECK_THREAD;
+	CHECK_THREAD
 	CheckValid();
 	PUTBYTES(8);
 	UInt64 Converted = HostToNetwork8(&a_Value);
@@ -618,7 +626,7 @@ bool cByteBuffer::WriteBEDouble(double a_Value)
 
 bool cByteBuffer::WriteBool(bool a_Value)
 {
-	CHECK_THREAD;
+	CHECK_THREAD
 	CheckValid();
 	return WriteChar(a_Value ? 1 : 0);
 }
@@ -629,7 +637,7 @@ bool cByteBuffer::WriteBool(bool a_Value)
 
 bool cByteBuffer::WriteVarInt(UInt32 a_Value)
 {
-	CHECK_THREAD;
+	CHECK_THREAD
 	CheckValid();
 	
 	// A 32-bit integer can be encoded by at most 5 bytes:
@@ -650,7 +658,7 @@ bool cByteBuffer::WriteVarInt(UInt32 a_Value)
 
 bool cByteBuffer::WriteVarUTF8String(const AString & a_Value)
 {
-	CHECK_THREAD;
+	CHECK_THREAD
 	CheckValid();
 	PUTBYTES(a_Value.size() + 1);  // This is a lower-bound on the bytes that will be actually written. Fail early.
 	bool res = WriteVarInt((UInt32)(a_Value.size()));
@@ -667,7 +675,7 @@ bool cByteBuffer::WriteVarUTF8String(const AString & a_Value)
 
 bool cByteBuffer::WriteLEInt(int a_Value)
 {
-	CHECK_THREAD;
+	CHECK_THREAD
 	CheckValid();
 	#ifdef IS_LITTLE_ENDIAN
 		return WriteBuf((const char *)&a_Value, 4);
@@ -683,6 +691,7 @@ bool cByteBuffer::WriteLEInt(int a_Value)
 
 bool cByteBuffer::WritePosition(int a_BlockX, int a_BlockY, int a_BlockZ)
 {
+	CHECK_THREAD
 	return WriteBEInt64(((Int64)a_BlockX & 0x3FFFFFF) << 38 | ((Int64)a_BlockY & 0xFFF) << 26 | ((Int64)a_BlockZ & 0x3FFFFFF));
 }
 
@@ -692,7 +701,7 @@ bool cByteBuffer::WritePosition(int a_BlockX, int a_BlockY, int a_BlockZ)
 
 bool cByteBuffer::ReadBuf(void * a_Buffer, size_t a_Count)
 {
-	CHECK_THREAD;
+	CHECK_THREAD
 	CheckValid();
 	NEEDBYTES(a_Count);
 	char * Dst = (char *)a_Buffer;  // So that we can do byte math
@@ -725,7 +734,7 @@ bool cByteBuffer::ReadBuf(void * a_Buffer, size_t a_Count)
 
 bool cByteBuffer::WriteBuf(const void * a_Buffer, size_t a_Count)
 {
-	CHECK_THREAD;
+	CHECK_THREAD
 	CheckValid();
 	PUTBYTES(a_Count);
 	char * Src = (char *)a_Buffer;  // So that we can do byte math
@@ -755,7 +764,7 @@ bool cByteBuffer::WriteBuf(const void * a_Buffer, size_t a_Count)
 
 bool cByteBuffer::ReadString(AString & a_String, size_t a_Count)
 {
-	CHECK_THREAD;
+	CHECK_THREAD
 	CheckValid();
 	NEEDBYTES(a_Count);
 	a_String.clear();
@@ -790,7 +799,7 @@ bool cByteBuffer::ReadString(AString & a_String, size_t a_Count)
 bool cByteBuffer::ReadUTF16String(AString & a_String, size_t a_NumChars)
 {
 	// Reads 2 * a_NumChars bytes and interprets it as a UTF16 string, converting it into UTF8 string a_String
-	CHECK_THREAD;
+	CHECK_THREAD
 	CheckValid();
 	AString RawData;
 	if (!ReadString(RawData, a_NumChars * 2))
@@ -807,7 +816,7 @@ bool cByteBuffer::ReadUTF16String(AString & a_String, size_t a_NumChars)
 
 bool cByteBuffer::SkipRead(size_t a_Count)
 {
-	CHECK_THREAD;
+	CHECK_THREAD
 	CheckValid();
 	if (!CanReadBytes(a_Count))
 	{
@@ -823,7 +832,7 @@ bool cByteBuffer::SkipRead(size_t a_Count)
 
 void cByteBuffer::ReadAll(AString & a_Data)
 {
-	CHECK_THREAD;
+	CHECK_THREAD
 	CheckValid();
 	ReadString(a_Data, GetReadableSpace());
 }
@@ -834,6 +843,7 @@ void cByteBuffer::ReadAll(AString & a_Data)
 
 bool cByteBuffer::ReadToByteBuffer(cByteBuffer & a_Dst, size_t a_NumBytes)
 {
+	CHECK_THREAD
 	if (!a_Dst.CanWriteBytes(a_NumBytes) || !CanReadBytes(a_NumBytes))
 	{
 		// There's not enough source bytes or space in the dest BB
@@ -858,7 +868,7 @@ bool cByteBuffer::ReadToByteBuffer(cByteBuffer & a_Dst, size_t a_NumBytes)
 
 void cByteBuffer::CommitRead(void)
 {
-	CHECK_THREAD;
+	CHECK_THREAD
 	CheckValid();
 	m_DataStart = m_ReadPos;
 }
@@ -869,7 +879,7 @@ void cByteBuffer::CommitRead(void)
 
 void cByteBuffer::ResetRead(void)
 {
-	CHECK_THREAD;
+	CHECK_THREAD
 	CheckValid();
 	m_ReadPos = m_DataStart;
 }
@@ -882,7 +892,7 @@ void cByteBuffer::ReadAgain(AString & a_Out)
 {
 	// Return the data between m_DataStart and m_ReadPos (the data that has been read but not committed)
 	// Used by ProtoProxy to repeat communication twice, once for parsing and the other time for the remote party
-	CHECK_THREAD;
+	CHECK_THREAD
 	CheckValid();
 	size_t DataStart = m_DataStart;
 	if (m_ReadPos < m_DataStart)
@@ -902,7 +912,7 @@ void cByteBuffer::ReadAgain(AString & a_Out)
 
 void cByteBuffer::AdvanceReadPos(size_t a_Count)
 {
-	CHECK_THREAD;
+	CHECK_THREAD
 	CheckValid();
 	m_ReadPos += a_Count;
 	if (m_ReadPos >= m_BufferSize)
diff --git a/src/ByteBuffer.h b/src/ByteBuffer.h
index 70de419f0..2a316fa32 100644
--- a/src/ByteBuffer.h
+++ b/src/ByteBuffer.h
@@ -130,13 +130,15 @@ protected:
 	char * m_Buffer;
 	size_t m_BufferSize;  // Total size of the ringbuffer
 	
-	#ifdef _DEBUG
-	volatile unsigned long m_ThreadID;  // Thread that is currently accessing the object, checked via cSingleThreadAccessChecker
-	#endif  // _DEBUG
-	
 	size_t m_DataStart;  // Where the data starts in the ringbuffer
 	size_t m_WritePos;   // Where the data ends in the ringbuffer
 	size_t m_ReadPos;    // Where the next read will start in the ringbuffer
+
+	#ifdef _DEBUG
+		/** The ID of the thread currently accessing the object.
+		Used for checking that only one thread accesses the object at a time, via cSingleThreadAccessChecker. */
+		mutable std::thread::id m_ThreadID;
+	#endif
 	
 	/** Advances the m_ReadPos by a_Count bytes */
 	void AdvanceReadPos(size_t a_Count);
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 096fa824d..997326cc7 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -9,6 +9,7 @@ include_directories (SYSTEM "${CMAKE_CURRENT_SOURCE_DIR}/../lib/polarssl/include
 set(FOLDERS
 	OSSupport HTTPServer Items Blocks Protocol Generating PolarSSL++ Bindings
 	WorldStorage Mobs Entities Simulator UI BlockEntities Generating/Prefabs
+	Noise
 )
 
 SET (SRCS
@@ -50,7 +51,6 @@ SET (SRCS
 	MobProximityCounter.cpp
 	MobSpawner.cpp
 	MonsterConfig.cpp
-	Noise.cpp
 	ProbabDistrib.cpp
 	RankManager.cpp
 	RCONServer.cpp
@@ -65,7 +65,8 @@ SET (SRCS
 	VoronoiMap.cpp
 	WebAdmin.cpp
 	World.cpp
-	main.cpp)
+	main.cpp
+)
 
 SET (HDRS
 	AllocationPool.h
@@ -103,7 +104,6 @@ SET (HDRS
 	Inventory.h
 	Item.h
 	ItemGrid.h
-	LeakFinder.h
 	LightingThread.h
 	LineBlockTracer.h
 	LinearInterpolation.h
@@ -113,14 +113,11 @@ SET (HDRS
 	Map.h
 	MapManager.h
 	Matrix4.h
-	MemoryLeak.h
-	MersenneTwister.h
 	MobCensus.h
 	MobFamilyCollecter.h
 	MobProximityCounter.h
 	MobSpawner.h
 	MonsterConfig.h
-	Noise.h
 	ProbabDistrib.h
 	RankManager.h
 	RCONServer.h
@@ -128,7 +125,6 @@ SET (HDRS
 	Scoreboard.h
 	Server.h
 	SetChunkData.h
-	StackWalker.h
 	Statistics.h
 	StringCompression.h
 	StringUtils.h
@@ -137,7 +133,8 @@ SET (HDRS
 	VoronoiMap.h
 	WebAdmin.h
 	World.h
-	XMLParser.h)
+	XMLParser.h
+)
 
 include_directories(".")
 include_directories ("${CMAKE_CURRENT_SOURCE_DIR}/../lib/sqlite")
@@ -175,6 +172,10 @@ if (NOT MSVC)
 else ()
 	# MSVC-specific handling: Put all files into one project, separate by the folders:
 
+	# Add the MSVC-specific LeakFinder sources:
+	list (APPEND SRCS LeakFinder.cpp StackWalker.cpp)
+	list (APPEND HDRS LeakFinder.h StackWalker.h MemoryLeak.h)
+
 	source_group(Bindings FILES "Bindings/Bindings.cpp" "Bindings/Bindings.h")
 
 	# Add all subfolders as solution-folders:
@@ -224,7 +225,7 @@ else ()
 		Bindings/Bindings.cpp PROPERTIES COMPILE_FLAGS "/Yc\"string.h\" /Fp\"$(IntDir)/Bindings.pch\""
 	)
 	SET_SOURCE_FILES_PROPERTIES(
-		"StackWalker.cpp LeakFinder.h" PROPERTIES COMPILE_FLAGS "/Yc\"Globals.h\""
+		"StackWalker.cpp LeakFinder.cpp" PROPERTIES COMPILE_FLAGS "/Yc\"Globals.h\""
 	)
 	list(APPEND SOURCE "Resources/MCServer.rc")
 
@@ -314,7 +315,7 @@ endif ()
 
 if (NOT MSVC)
 	target_link_libraries(${EXECUTABLE}
-		OSSupport HTTPServer Bindings Items Blocks
+		OSSupport HTTPServer Bindings Items Blocks Noise
 		Protocol Generating Generating_Prefabs WorldStorage
 		Mobs Entities Simulator UI BlockEntities PolarSSL++
 	)
diff --git a/src/CheckBasicStyle.lua b/src/CheckBasicStyle.lua
index 76ae8c325..0c7b05d6d 100644
--- a/src/CheckBasicStyle.lua
+++ b/src/CheckBasicStyle.lua
@@ -92,6 +92,25 @@ end
 
 local g_ViolationPatterns =
 {
+	-- Parenthesis around comparisons:
+	{"==[^)]+&&",     "Add parenthesis around comparison"},
+	{"&&[^(]+==",     "Add parenthesis around comparison"},
+	{"==[^)]+||",     "Add parenthesis around comparison"},
+	{"||[^(]+==",     "Add parenthesis around comparison"},
+	{"!=[^)]+&&",     "Add parenthesis around comparison"},
+	{"&&[^(]+!=",     "Add parenthesis around comparison"},
+	{"!=[^)]+||",     "Add parenthesis around comparison"},
+	{"||[^(]+!=",     "Add parenthesis around comparison"},
+	{"<[^)T][^)]*&&", "Add parenthesis around comparison"},  -- Must take special care of templates: "template <T> fn(Args && ...)"
+	{"&&[^(]+<",      "Add parenthesis around comparison"},
+	{"<[^)T][^)]*||", "Add parenthesis around comparison"},  -- Must take special care of templates: "template <T> fn(Args && ...)"
+	{"||[^(]+<",      "Add parenthesis around comparison"},
+	-- Cannot check ">" because of "obj->m_Flag &&". Check at least ">=":
+	{">=[^)]+&&",     "Add parenthesis around comparison"},
+	{"&&[^(]+>=",     "Add parenthesis around comparison"},
+	{">=[^)]+||",     "Add parenthesis around comparison"},
+	{"||[^(]+>=",     "Add parenthesis around comparison"},
+
 	-- Check against indenting using spaces:
 	{"^\t* +", "Indenting with a space"},
 	
@@ -116,11 +135,11 @@ local g_ViolationPatterns =
 	
 	-- Space after keywords:
 	{"[^_]if%(", "Needs a space after \"if\""},
-	{"for%(", "Needs a space after \"for\""},
-	{"while%(", "Needs a space after \"while\""},
-	{"switch%(", "Needs a space after \"switch\""},
-	{"catch%(", "Needs a space after \"catch\""},
-	{"template<", "Needs a space after \"template\""},
+	{"%sfor%(", "Needs a space after \"for\""},
+	{"%swhile%(", "Needs a space after \"while\""},
+	{"%sswitch%(", "Needs a space after \"switch\""},
+	{"%scatch%(", "Needs a space after \"catch\""},
+	{"%stemplate<", "Needs a space after \"template\""},
 	
 	-- No space after keyword's parenthesis:
 	{"[^%a#]if %( ", "Remove the space after \"(\""},
@@ -162,6 +181,7 @@ local function ProcessFile(a_FileName)
 	-- Ref.: http://stackoverflow.com/questions/10416869/iterate-over-possibly-empty-lines-in-a-way-that-matches-the-expectations-of-exis
 	local lineCounter = 1
 	local lastIndentLevel = 0
+	local isLastLineControl = false
 	all:gsub("\r\n", "\n")  -- normalize CRLF into LF-only
 	string.gsub(all .. "\n", "[^\n]*\n",  -- Iterate over each line, while preserving empty lines
 		function(a_Line)
@@ -198,6 +218,24 @@ local function ProcessFile(a_FileName)
 				end
 				lastIndentLevel = indentLevel
 			end
+			
+			-- Check that control statements have braces on separate lines after them:
+			-- Note that if statements can be broken into multiple lines, in which case this test is not taken
+			if (isLastLineControl) then
+				if not(a_Line:find("^%s*{") or a_Line:find("^%s*#")) then
+					-- Not followed by a brace, not followed by a preprocessor
+					ReportViolation(a_FileName, lineCounter - 1, 1, 1, "Control statement needs a brace on separate line")
+				end
+			end
+			local lineWithSpace = " " .. a_Line
+			isLastLineControl =
+				lineWithSpace:find("^%s+if %b()") or
+				lineWithSpace:find("^%s+else if %b()") or
+				lineWithSpace:find("^%s+for %b()") or
+				lineWithSpace:find("^%s+switch %b()") or
+				lineWithSpace:find("^%s+else\n") or
+				lineWithSpace:find("^%s+else  //") or
+				lineWithSpace:find("^%s+do %b()")
 
 			lineCounter = lineCounter + 1
 		end
@@ -227,6 +265,9 @@ end
 
 
 
+-- Remove buffering from stdout, so that the output appears immediately in IDEs:
+io.stdout:setvbuf("no")
+
 -- Process all files in the AllFiles.lst file (generated by cmake):
 for fnam in io.lines("AllFiles.lst") do
 	ProcessItem(fnam)
diff --git a/src/Chunk.cpp b/src/Chunk.cpp
index ba6c925cd..39e97f5cf 100644
--- a/src/Chunk.cpp
+++ b/src/Chunk.cpp
@@ -16,18 +16,18 @@
 #include "BlockEntities/ChestEntity.h"
 #include "BlockEntities/DispenserEntity.h"
 #include "BlockEntities/DropperEntity.h"
+#include "BlockEntities/FlowerPotEntity.h"
 #include "BlockEntities/FurnaceEntity.h"
 #include "BlockEntities/HopperEntity.h"
 #include "BlockEntities/JukeboxEntity.h"
+#include "BlockEntities/MobHeadEntity.h"
+#include "BlockEntities/MobSpawnerEntity.h"
 #include "BlockEntities/NoteEntity.h"
 #include "BlockEntities/SignEntity.h"
-#include "BlockEntities/MobHeadEntity.h"
-#include "BlockEntities/FlowerPotEntity.h"
 #include "Entities/Pickup.h"
 #include "Item.h"
-#include "Noise.h"
+#include "Noise/Noise.h"
 #include "Root.h"
-#include "MersenneTwister.h"
 #include "Entities/Player.h"
 #include "BlockArea.h"
 #include "Bindings/PluginManager.h"
@@ -1348,6 +1348,7 @@ void cChunk::CreateBlockEntities(void)
 					case E_BLOCK_NOTE_BLOCK:
 					case E_BLOCK_JUKEBOX:
 					case E_BLOCK_FLOWER_POT:
+					case E_BLOCK_MOB_SPAWNER:
 					{
 						if (!HasBlockEntityAt(x + m_PosX * Width, y, z + m_PosZ * Width))
 						{
@@ -1479,6 +1480,7 @@ void cChunk::SetBlock(int a_RelX, int a_RelY, int a_RelZ, BLOCKTYPE a_BlockType,
 		case E_BLOCK_NOTE_BLOCK:
 		case E_BLOCK_JUKEBOX:
 		case E_BLOCK_FLOWER_POT:
+		case E_BLOCK_MOB_SPAWNER:
 		{
 			AddBlockEntity(cBlockEntity::CreateByBlockType(a_BlockType, a_BlockMeta, WorldPos.x, WorldPos.y, WorldPos.z, m_World));
 			break;
@@ -1869,18 +1871,18 @@ bool cChunk::AddClient(cClientHandle * a_Client)
 
 void cChunk::RemoveClient(cClientHandle * a_Client)
 {
-	for (cClientHandleList::iterator itr = m_LoadedByClient.begin(); itr != m_LoadedByClient.end(); ++itr)
+	for (cClientHandleList::iterator itrC = m_LoadedByClient.begin(); itrC != m_LoadedByClient.end(); ++itrC)
 	{
-		if (*itr != a_Client)
+		if (*itrC != a_Client)
 		{
 			continue;
 		}
 
-		m_LoadedByClient.erase(itr);
+		m_LoadedByClient.erase(itrC);
 
 		if (!a_Client->IsDestroyed())
 		{
-			for (cEntityList::iterator itr = m_Entities.begin(); itr != m_Entities.end(); ++itr)
+			for (cEntityList::iterator itrE = m_Entities.begin(); itrE != m_Entities.end(); ++itrE)
 			{
 				/*
 				// DEBUG:
@@ -1889,7 +1891,7 @@ void cChunk::RemoveClient(cClientHandle * a_Client)
 					(*itr)->GetUniqueID(), a_Client->GetUsername().c_str()
 				);
 				*/
-				a_Client->SendDestroyEntity(*(*itr));
+				a_Client->SendDestroyEntity(*(*itrE));
 			}
 		}
 		return;
diff --git a/src/ChunkDef.h b/src/ChunkDef.h
index 260aace58..8f1d416ad 100644
--- a/src/ChunkDef.h
+++ b/src/ChunkDef.h
@@ -410,7 +410,7 @@ typedef std::list<cChunkCoordsWithBool> cChunkCoordsWithBoolList;
 
 
 
-/// Interface class used as a callback for operations that involve chunk coords
+/** Interface class used as a callback for operations that involve chunk coords */
 class cChunkCoordCallback
 {
 public:
@@ -424,6 +424,27 @@ public:
 
 
 
+/** Provides storage for a set of chunk coords together with a callback.
+Used for chunk queues that notify about processed items. */
+class cChunkCoordsWithCallback
+{
+public:
+	cChunkCoordsWithCallback(int a_ChunkX, int a_ChunkZ, cChunkCoordCallback * a_Callback):
+		m_ChunkX(a_ChunkX),
+		m_ChunkZ(a_ChunkZ),
+		m_Callback(a_Callback)
+	{
+	}
+
+	int m_ChunkX;
+	int m_ChunkZ;
+	cChunkCoordCallback * m_Callback;
+};
+
+
+
+
+
 /** Generic template that can store any kind of data together with a triplet of 3 coords*/
 template <typename X> class cCoordWithData
 {
diff --git a/src/ChunkMap.cpp b/src/ChunkMap.cpp
index 595040a54..222a756b1 100644
--- a/src/ChunkMap.cpp
+++ b/src/ChunkMap.cpp
@@ -822,6 +822,7 @@ void cChunkMap::WakeUpSimulatorsInArea(int a_MinBlockX, int a_MaxBlockX, int a_M
 	int MinChunkX, MinChunkZ, MaxChunkX, MaxChunkZ;
 	cChunkDef::BlockToChunk(a_MinBlockX, a_MinBlockZ, MinChunkX, MinChunkZ);
 	cChunkDef::BlockToChunk(a_MaxBlockX, a_MaxBlockZ, MaxChunkX, MaxChunkZ);
+	cCSLock Lock(m_CSLayers);
 	for (int z = MinChunkZ; z <= MaxChunkZ; z++)
 	{
 		int MinZ = std::max(a_MinBlockZ, z * cChunkDef::Width);
@@ -2348,6 +2349,103 @@ void cChunkMap::TouchChunk(int a_ChunkX, int a_ChunkZ)
 
 
 
+void cChunkMap::PrepareChunk(int a_ChunkX, int a_ChunkZ, cChunkCoordCallback * a_Callback)
+{
+	cCSLock Lock(m_CSLayers);
+	cChunkPtr Chunk = GetChunkNoLoad(a_ChunkX, a_ChunkZ);
+
+	// If the chunk is not prepared, queue it in the lighting thread, that will do all the needed processing:
+	if ((Chunk == nullptr) || !Chunk->IsValid() || !Chunk->IsLightValid())
+	{
+		m_World->GetLightingThread().QueueChunk(a_ChunkX, a_ChunkZ, a_Callback);
+		return;
+	}
+
+	// The chunk is present and lit, just call the callback:
+	if (a_Callback != nullptr)
+	{
+		a_Callback->Call(a_ChunkX, a_ChunkZ);
+	}
+}
+
+
+
+
+
+bool cChunkMap::GenerateChunk(int a_ChunkX, int a_ChunkZ, cChunkCoordCallback * a_Callback)
+{
+	cCSLock Lock(m_CSLayers);
+	cChunkPtr Chunk = GetChunkNoLoad(a_ChunkX, a_ChunkZ);
+	if (Chunk == nullptr)
+	{
+		// Generic error while getting the chunk - out of memory?
+		return false;
+	}
+
+	// Try loading the chunk:
+	if ((Chunk == nullptr) || (!Chunk->IsValid()))
+	{
+		class cPrepareLoadCallback: public cChunkCoordCallback
+		{
+		public:
+			cPrepareLoadCallback(cWorld & a_World, cChunkMap & a_ChunkMap, cChunkCoordCallback * a_Callback):
+				m_World(a_World),
+				m_ChunkMap(a_ChunkMap),
+				m_Callback(a_Callback)
+			{
+			}
+
+			// cChunkCoordCallback override:
+			virtual void Call(int a_CBChunkX, int a_CBChunkZ) override
+			{
+				// The chunk has been loaded or an error occurred, check if it's valid now:
+				cChunkPtr CBChunk = m_ChunkMap.GetChunkNoLoad(a_CBChunkX, a_CBChunkZ);
+
+				if (CBChunk == nullptr)
+				{
+					// An error occurred, but we promised to call the callback, so call it even when there's no real chunk data:
+					if (m_Callback != nullptr)
+					{
+						m_Callback->Call(a_CBChunkX, a_CBChunkZ);
+					}
+					return;
+				}
+
+				// If the chunk is not valid, queue it in the generator:
+				if (!CBChunk->IsValid())
+				{
+					m_World.GetGenerator().QueueGenerateChunk(a_CBChunkX, a_CBChunkZ, false, m_Callback);
+					return;
+				}
+
+				// The chunk was loaded, call the callback:
+				if (m_Callback != nullptr)
+				{
+					m_Callback->Call(a_CBChunkX, a_CBChunkZ);
+				}
+			}
+
+		protected:
+			cWorld & m_World;
+			cChunkMap & m_ChunkMap;
+			cChunkCoordCallback * m_Callback;
+		};
+		m_World->GetStorage().QueueLoadChunk(a_ChunkX, a_ChunkZ, new cPrepareLoadCallback(*m_World, *this, a_Callback));
+		return true;
+	}
+
+	// The chunk is valid, just call the callback:
+	if (a_Callback != nullptr)
+	{
+		a_Callback->Call(a_ChunkX, a_ChunkZ);
+	}
+	return true;
+}
+
+
+
+
+
 void cChunkMap::ChunkLoadFailed(int a_ChunkX, int a_ChunkZ)
 {
 	cCSLock Lock(m_CSLayers);
diff --git a/src/ChunkMap.h b/src/ChunkMap.h
index 51be5cb3d..6a858b06d 100644
--- a/src/ChunkMap.h
+++ b/src/ChunkMap.h
@@ -280,6 +280,20 @@ public:
 
 	/** Touches the chunk, causing it to be loaded or generated */
 	void TouchChunk(int a_ChunkX, int a_ChunkZ);
+
+	/** Queues the chunk for preparing - making sure that it's generated and lit.
+	The specified chunk is queued to be loaded or generated, and lit if needed.
+	The specified callback is called after the chunk has been prepared. If there's no preparation to do, only the callback is called.
+	It is legal to call without the callback. */
+	void PrepareChunk(int a_ChunkX, int a_ChunkZ, cChunkCoordCallback * a_CallAfter = nullptr);  // Lua-accessible
+
+	/** Queues the chunk for generating.
+	First attempts to load the chunk from the storage. If that fails, queues the chunk for generating.
+	The specified callback is called after the chunk has been loaded / generated.
+	It is legal to call without the callback.
+	Returns true if successful, false if not (possibly an out-of-memory error).
+	If the return value is true, the callback was / will be called. */
+	bool GenerateChunk(int a_ChunkX, int a_ChunkZ, cChunkCoordCallback * a_CallAfter = nullptr);  // Lua-accessible
 	
 	/** Marks the chunk as failed-to-load */
 	void ChunkLoadFailed(int a_ChunkX, int a_ChunkZ);
diff --git a/src/ChunkSender.cpp b/src/ChunkSender.cpp
index ef2be167b..83d82884e 100644
--- a/src/ChunkSender.cpp
+++ b/src/ChunkSender.cpp
@@ -184,7 +184,7 @@ void cChunkSender::Execute(void)
 	while (!m_ShouldTerminate)
 	{
 		cCSLock Lock(m_CS);
-		while (m_ChunksReady.empty() && m_SendChunksLowPriority.empty() && m_SendChunksHighPriority.empty())
+		while (m_ChunksReady.empty() && m_SendChunksLowPriority.empty() && m_SendChunksMediumPriority.empty() && m_SendChunksHighPriority.empty())
 		{
 			int RemoveCount = m_RemoveCount;
 			m_RemoveCount = 0;
diff --git a/src/ClientHandle.cpp b/src/ClientHandle.cpp
index faee05450..cb9d34c84 100644
--- a/src/ClientHandle.cpp
+++ b/src/ClientHandle.cpp
@@ -16,7 +16,6 @@
 #include "Mobs/Monster.h"
 #include "ChatColor.h"
 #include "OSSupport/Socket.h"
-#include "OSSupport/Timer.h"
 #include "Items/ItemHandler.h"
 #include "Blocks/BlockHandler.h"
 #include "Blocks/BlockSlab.h"
@@ -25,8 +24,6 @@
 #include "Root.h"
 
 #include "Protocol/Authenticator.h"
-#include "MersenneTwister.h"
-
 #include "Protocol/ProtocolRecognizer.h"
 #include "CompositeChat.h"
 #include "Items/ItemSword.h"
@@ -41,18 +38,13 @@
 /** Maximum number of block change interactions a player can perform per tick - exceeding this causes a kick */
 #define MAX_BLOCK_CHANGE_INTERACTIONS 20
 
+/** The interval for sending pings to clients.
+Vanilla sends one ping every 1 second. */
+static const std::chrono::milliseconds PING_TIME_MS = std::chrono::milliseconds(1000);
 
 
 
 
-#define RECI_RAND_MAX (1.f/RAND_MAX)
-inline int fRadRand(MTRand & r1, int a_BlockCoord)
-{
-	return a_BlockCoord * 32 + (int)(16 * ((float)r1.rand() * RECI_RAND_MAX) * 16 - 8);
-}
-
-
-
 
 
 int cClientHandle::s_ClientCount = 0;
@@ -65,7 +57,8 @@ int cClientHandle::s_ClientCount = 0;
 // cClientHandle:
 
 cClientHandle::cClientHandle(const cSocket * a_Socket, int a_ViewDistance) :
-	m_ViewDistance(a_ViewDistance),
+	m_CurrentViewDistance(a_ViewDistance),
+	m_RequestedViewDistance(a_ViewDistance),
 	m_IPString(a_Socket->GetIPString()),
 	m_OutgoingData(64 KiB),
 	m_Player(nullptr),
@@ -75,8 +68,6 @@ cClientHandle::cClientHandle(const cSocket * a_Socket, int a_ViewDistance) :
 	m_TimeSinceLastPacket(0),
 	m_Ping(1000),
 	m_PingID(1),
-	m_PingStartTime(0),
-	m_LastPingTime(1000),
 	m_BlockDigAnimStage(-1),
 	m_BlockDigAnimSpeed(0),
 	m_BlockDigAnimX(0),
@@ -93,15 +84,14 @@ cClientHandle::cClientHandle(const cSocket * a_Socket, int a_ViewDistance) :
 	m_UniqueID(0),
 	m_HasSentPlayerChunk(false),
 	m_Locale("en_GB"),
+	m_LastPlacedSign(0, -1, 0),
 	m_ProtocolVersion(0)
 {
 	m_Protocol = new cProtocolRecognizer(this);
 	
 	s_ClientCount++;  // Not protected by CS because clients are always constructed from the same thread
 	m_UniqueID = s_ClientCount;
-
-	cTimer t1;
-	m_LastPingTime = t1.GetNowTime();
+	m_PingStartTime = std::chrono::steady_clock::now();
 
 	LOGD("New ClientHandle created at %p", this);
 }
@@ -197,9 +187,13 @@ void cClientHandle::GenerateOfflineUUID(void)
 AString cClientHandle::FormatChatPrefix(bool ShouldAppendChatPrefixes, AString a_ChatPrefixS, AString m_Color1, AString m_Color2)
 {
 	if (ShouldAppendChatPrefixes)
+	{
 		return Printf("%s[%s] %s", m_Color1.c_str(), a_ChatPrefixS.c_str(), m_Color2.c_str());
+	}
 	else
+	{
 		return Printf("%s", m_Color1.c_str());
+	}
 }
 
 
@@ -395,8 +389,7 @@ void cClientHandle::Authenticate(const AString & a_Name, const AString & a_UUID,
 
 	// Delay the first ping until the client "settles down"
 	// This should fix #889, "BadCast exception, cannot convert bit to fm" error in client
-	cTimer t1;
-	m_LastPingTime = t1.GetNowTime() + 3000;  // Send the first KeepAlive packet in 3 seconds
+	m_PingStartTime = std::chrono::steady_clock::now() + std::chrono::seconds(3);  // Send the first KeepAlive packet in 3 seconds
 
 	cRoot::Get()->GetPluginManager()->CallHookPlayerSpawned(*m_Player);
 }
@@ -430,7 +423,7 @@ bool cClientHandle::StreamNextChunk(void)
 	cCSLock Lock(m_CSChunkLists);
 
 	// High priority: Load the chunks that are in the view-direction of the player (with a radius of 3)
-	for (int Range = 0; Range < m_ViewDistance; Range++)
+	for (int Range = 0; Range < m_CurrentViewDistance; Range++)
 	{
 		Vector3d Vector = Position + LookVector * cChunkDef::Width * Range;
 
@@ -447,7 +440,7 @@ bool cClientHandle::StreamNextChunk(void)
 				cChunkCoords Coords(ChunkX, ChunkZ);
 
 				// Checks if the chunk is in distance
-				if ((Diff(ChunkX, ChunkPosX) > m_ViewDistance) || (Diff(ChunkZ, ChunkPosZ) > m_ViewDistance))
+				if ((Diff(ChunkX, ChunkPosX) > m_CurrentViewDistance) || (Diff(ChunkZ, ChunkPosZ) > m_CurrentViewDistance))
 				{
 					continue;
 				}
@@ -470,7 +463,7 @@ bool cClientHandle::StreamNextChunk(void)
 	}
 
 	// Low priority: Add all chunks that are in range. (From the center out to the edge)
-	for (int d = 0; d <= m_ViewDistance; ++d)  // cycle through (square) distance, from nearest to furthest
+	for (int d = 0; d <= m_CurrentViewDistance; ++d)  // cycle through (square) distance, from nearest to furthest
 	{
 		// For each distance add chunks in a hollow square centered around current position:
 		cChunkCoordsList CurcleChunks;
@@ -528,7 +521,7 @@ void cClientHandle::UnloadOutOfRangeChunks(void)
 		{
 			int DiffX = Diff((*itr).m_ChunkX, ChunkPosX);
 			int DiffZ = Diff((*itr).m_ChunkZ, ChunkPosZ);
-			if ((DiffX > m_ViewDistance) || (DiffZ > m_ViewDistance))
+			if ((DiffX > m_CurrentViewDistance) || (DiffZ > m_CurrentViewDistance))
 			{
 				ChunksToRemove.push_back(*itr);
 				itr = m_LoadedChunks.erase(itr);
@@ -543,7 +536,7 @@ void cClientHandle::UnloadOutOfRangeChunks(void)
 		{
 			int DiffX = Diff((*itr).m_ChunkX, ChunkPosX);
 			int DiffZ = Diff((*itr).m_ChunkZ, ChunkPosZ);
-			if ((DiffX > m_ViewDistance) || (DiffZ > m_ViewDistance))
+			if ((DiffX > m_CurrentViewDistance) || (DiffZ > m_CurrentViewDistance))
 			{
 				itr = m_ChunksToSend.erase(itr);
 			}
@@ -557,7 +550,7 @@ void cClientHandle::UnloadOutOfRangeChunks(void)
 	for (cChunkCoordsList::iterator itr = ChunksToRemove.begin(); itr != ChunksToRemove.end(); ++itr)
 	{
 		m_Player->GetWorld()->RemoveChunkClient(itr->m_ChunkX, itr->m_ChunkZ, this);
-		m_Protocol->SendUnloadChunk(itr->m_ChunkX, itr->m_ChunkZ);
+		SendUnloadChunk(itr->m_ChunkX, itr->m_ChunkZ);
 	}
 }
 
@@ -1236,12 +1229,18 @@ void cClientHandle::HandleRightClick(int a_BlockX, int a_BlockY, int a_BlockZ, e
 {
 	// TODO: Rewrite this function
 
-	LOGD("HandleRightClick: {%d, %d, %d}, face %d, HeldItem: %s",
-		a_BlockX, a_BlockY, a_BlockZ, a_BlockFace, ItemToFullString(a_HeldItem).c_str()
+	// Distance from the block's center to the player's eye height
+	double dist = (Vector3d(a_BlockX, a_BlockY, a_BlockZ) + Vector3d(0.5, 0.5, 0.5) - m_Player->GetEyePosition()).Length();
+	LOGD("HandleRightClick: {%d, %d, %d}, face %d, HeldItem: %s; dist: %.02f",
+		a_BlockX, a_BlockY, a_BlockZ, a_BlockFace, ItemToFullString(a_HeldItem).c_str(), dist
 	);
-	
+
+	// Check the reach distance:
+	// _X 2014-11-25: I've maxed at 5.26 with a Survival client and 5.78 with a Creative client in my tests
+	double maxDist = m_Player->IsGameModeCreative() ? 5.78 : 5.26;
+	bool AreRealCoords = (dist <= maxDist);
+
 	cWorld * World = m_Player->GetWorld();
-	bool AreRealCoords = (Vector3d(a_BlockX, a_BlockY, a_BlockZ) - m_Player->GetPosition()).Length() <= 5;
 
 	if (
 		(a_BlockFace != BLOCK_FACE_NONE) &&  // The client is interacting with a specific block
@@ -1500,6 +1499,7 @@ void cClientHandle::HandlePlaceBlock(int a_BlockX, int a_BlockY, int a_BlockZ, e
 	{
 		m_Player->GetInventory().RemoveOneEquippedItem();
 	}
+
 	cChunkInterface ChunkInterface(World->GetChunkMap());
 	NewBlock->OnPlacedByPlayer(ChunkInterface, *World, m_Player, a_BlockX, a_BlockY, a_BlockZ, a_BlockFace, a_CursorX, a_CursorY, a_CursorZ, BlockType, BlockMeta);
 	
@@ -1677,8 +1677,11 @@ void cClientHandle::HandleUpdateSign(
 	const AString & a_Line3, const AString & a_Line4
 )
 {
-	cWorld * World = m_Player->GetWorld();
-	World->UpdateSign(a_BlockX, a_BlockY, a_BlockZ, a_Line1, a_Line2, a_Line3, a_Line4, m_Player);
+	if (m_LastPlacedSign.Equals(Vector3i(a_BlockX, a_BlockY, a_BlockZ)))
+	{
+		m_LastPlacedSign.Set(0, -1, 0);
+		m_Player->GetWorld()->SetSignLines(a_BlockX, a_BlockY, a_BlockZ, a_Line1, a_Line2, a_Line3, a_Line4, m_Player);
+	}
 }
 
 
@@ -1767,9 +1770,45 @@ void cClientHandle::HandleKeepAlive(int a_KeepAliveID)
 {
 	if (a_KeepAliveID == m_PingID)
 	{
-		cTimer t1;
-		m_Ping = (short)((t1.GetNowTime() - m_PingStartTime) / 2);
+		m_Ping = std::chrono::steady_clock::now() - m_PingStartTime;
+	}
+}
+
+
+
+
+
+bool cClientHandle::CheckMultiLogin(const AString & a_Username)
+{
+	// If the multilogin is allowed, skip this check entirely:
+	if ((cRoot::Get()->GetServer()->DoesAllowMultiLogin()))
+	{
+		return true;
+	}
+	
+	// Check if the player is waiting to be transferred to the World.
+	if (cRoot::Get()->GetServer()->IsPlayerInQueue(a_Username))
+	{
+		Kick("A player of the username is already logged in");
+		return false;
+	}
+
+	class cCallback :
+		public cPlayerListCallback
+	{
+		virtual bool Item(cPlayer * a_Player) override
+		{
+			return true;
+		}
+	} Callback;
+
+	// Check if the player is in any World.
+	if (cRoot::Get()->DoWithPlayer(a_Username, Callback))
+	{
+		Kick("A player of the username is already logged in");
+		return false;
 	}
+	return true;
 }
 
 
@@ -1786,7 +1825,8 @@ bool cClientHandle::HandleHandshake(const AString & a_Username)
 			return false;
 		}
 	}
-	return true;
+
+	return CheckMultiLogin(a_Username);
 }
 
 
@@ -1993,13 +2033,11 @@ void cClientHandle::Tick(float a_Dt)
 	// Send a ping packet:
 	if (m_State == csPlaying)
 	{
-		cTimer t1;
-		if ((m_LastPingTime + cClientHandle::PING_TIME_MS <= t1.GetNowTime()))
+		if ((m_PingStartTime + PING_TIME_MS <= std::chrono::steady_clock::now()))
 		{
 			m_PingID++;
-			m_PingStartTime = t1.GetNowTime();
+			m_PingStartTime = std::chrono::steady_clock::now();
 			m_Protocol->SendKeepAlive(m_PingID);
-			m_LastPingTime = m_PingStartTime;
 		}
 	}
 
@@ -2257,6 +2295,7 @@ void cClientHandle::SendDisconnect(const AString & a_Reason)
 
 void cClientHandle::SendEditSign(int a_BlockX, int a_BlockY, int a_BlockZ)
 {
+	m_LastPlacedSign.Set(a_BlockX, a_BlockY, a_BlockZ);
 	m_Protocol->SendEditSign(a_BlockX, a_BlockY, a_BlockZ);
 }
 
@@ -2847,8 +2886,15 @@ void cClientHandle::SetUsername( const AString & a_Username)
 
 void cClientHandle::SetViewDistance(int a_ViewDistance)
 {
-	m_ViewDistance = Clamp(a_ViewDistance, MIN_VIEW_DISTANCE, MAX_VIEW_DISTANCE);
-	LOGD("Setted %s's view distance to %i", GetUsername().c_str(), m_ViewDistance);
+	m_RequestedViewDistance = a_ViewDistance;
+	LOGD("%s is requesting ViewDistance of %d!", GetUsername().c_str(), m_RequestedViewDistance);
+
+	// Set the current view distance based on the requested VD and world max VD:
+	cWorld * world = m_Player->GetWorld();
+	if (world != nullptr)
+	{
+		m_CurrentViewDistance = Clamp(a_ViewDistance, cClientHandle::MIN_VIEW_DISTANCE, world->GetMaxViewDistance());
+	}
 }
 
 
diff --git a/src/ClientHandle.h b/src/ClientHandle.h
index 082ed2fcc..25dd250d9 100644
--- a/src/ClientHandle.h
+++ b/src/ClientHandle.h
@@ -215,11 +215,17 @@ public:
 	const AString & GetUsername(void) const;
 	void SetUsername( const AString & a_Username);
 	
-	inline short GetPing(void) const { return m_Ping; }
+	inline short GetPing(void) const { return static_cast<short>(std::chrono::duration_cast<std::chrono::milliseconds>(m_Ping).count()); }
 	
+	/** Sets the maximal view distance. */
 	void SetViewDistance(int a_ViewDistance);
-	int  GetViewDistance(void) const { return m_ViewDistance; }
-	
+
+	/** Returns the view distance that the player currently have. */
+	int GetViewDistance(void) const { return m_CurrentViewDistance; }
+
+	/** Returns the view distance that the player request, not the used view distance. */
+	int GetRequestedViewDistance(void) const { return m_RequestedViewDistance; }
+
 	void SetLocale(AString & a_Locale) { m_Locale = a_Locale; }
 	AString GetLocale(void) const { return m_Locale; }
 
@@ -274,6 +280,10 @@ public:
 	void HandleEntityLeaveBed         (int a_EntityID);
 	void HandleEntitySprinting        (int a_EntityID, bool a_IsSprinting);
 	
+	/** Kicks the client if the same username is already logged in.
+	Returns false if the client has been kicked, true otherwise. */
+	bool CheckMultiLogin(const AString & a_Username);
+	
 	/** Called when the protocol handshake has been received (for protocol versions that support it;
 	otherwise the first instant when a username is received).
 	Returns true if the player is to be let in, false if they were disconnected
@@ -333,12 +343,12 @@ private:
 	/** The type used for storing the names of registered plugin channels. */
 	typedef std::set<AString> cChannels;
 
-	/** Number of chunks the player can see in each direction */
-	int m_ViewDistance;
-	
-	/** Server generates this many chunks AHEAD of player sight. */
-	static const int GENERATEDISTANCE = 2;
-	
+	/** The actual view distance used, the minimum of client's requested view distance and world's max view distance. */
+	int m_CurrentViewDistance;
+
+	/** The requested view distance from the player. It isn't clamped with 1 and the max view distance of the world. */
+	int m_RequestedViewDistance;
+
 	AString m_IPString;
 
 	AString m_Username;
@@ -372,12 +382,15 @@ private:
 	/** Seconds since the last packet data was received (updated in Tick(), reset in DataReceived()) */
 	float m_TimeSinceLastPacket;
 	
-	short m_Ping;
-	int   m_PingID;
-	long long m_PingStartTime;
-	long long m_LastPingTime;
-	static const unsigned short PING_TIME_MS = 1000;  // Vanilla sends 1 per 20 ticks (1 second or every 1000 ms)
-	
+	/** Duration of the last completed client ping. */
+	std::chrono::steady_clock::duration m_Ping;
+
+	/** ID of the last ping request sent to the client. */
+	int m_PingID;
+
+	/** Time of the last ping request sent to the client. */
+	std::chrono::steady_clock::time_point m_PingStartTime;
+
 	// Values required for block dig animation
 	int m_BlockDigAnimStage;  // Current stage of the animation; -1 if not digging
 	int m_BlockDigAnimSpeed;  // Current speed of the animation (units ???)
@@ -432,6 +445,9 @@ private:
 
 	/** Client Settings */
 	AString m_Locale;
+
+	/** The positions from the last sign that the player placed. It's needed to verify the sign text change. */
+	Vector3i m_LastPlacedSign;
 	
 	/** The plugin channels that the client has registered. */
 	cChannels m_PluginChannels;
diff --git a/src/CraftingRecipes.cpp b/src/CraftingRecipes.cpp
index 64fb21181..202fb900e 100644
--- a/src/CraftingRecipes.cpp
+++ b/src/CraftingRecipes.cpp
@@ -289,12 +289,12 @@ void cCraftingRecipes::GetRecipe(cPlayer & a_Player, cCraftingGrid & a_CraftingG
 	}
 	
 	// Built-in recipes:
-	std::auto_ptr<cRecipe> Recipe(FindRecipe(a_CraftingGrid.GetItems(), a_CraftingGrid.GetWidth(), a_CraftingGrid.GetHeight()));
+	std::unique_ptr<cRecipe> Recipe(FindRecipe(a_CraftingGrid.GetItems(), a_CraftingGrid.GetWidth(), a_CraftingGrid.GetHeight()));
 	a_Recipe.Clear();
 	if (Recipe.get() == nullptr)
 	{
 		// Allow plugins to intercept a no-recipe-found situation:
-		cRoot::Get()->GetPluginManager()->CallHookCraftingNoRecipe(a_Player, a_CraftingGrid, &a_Recipe);
+		cRoot::Get()->GetPluginManager()->CallHookCraftingNoRecipe(a_Player, a_CraftingGrid, a_Recipe);
 		return;
 	}
 	for (cRecipeSlots::const_iterator itr = Recipe->m_Ingredients.begin(); itr != Recipe->m_Ingredients.end(); ++itr)
@@ -377,7 +377,7 @@ void cCraftingRecipes::AddRecipeLine(int a_LineNum, const AString & a_RecipeLine
 		return;
 	}
 	
-	std::auto_ptr<cCraftingRecipes::cRecipe> Recipe(new cCraftingRecipes::cRecipe);
+	std::unique_ptr<cCraftingRecipes::cRecipe> Recipe(new cCraftingRecipes::cRecipe);
 	
 	// Parse the result:
 	AStringVector ResultSplit = StringSplit(Sides[0], ",");
@@ -758,7 +758,7 @@ cCraftingRecipes::cRecipe * cCraftingRecipes::MatchRecipe(const cItem * a_Crafti
 	}  // for y, for x
 	
 	// The recipe has matched. Create a copy of the recipe and set its coords to match the crafting grid:
-	std::auto_ptr<cRecipe> Recipe(new cRecipe);
+	std::unique_ptr<cRecipe> Recipe(new cRecipe);
 	Recipe->m_Result = a_Recipe->m_Result;
 	Recipe->m_Width  = a_Recipe->m_Width;
 	Recipe->m_Height = a_Recipe->m_Height;
diff --git a/src/DeadlockDetect.cpp b/src/DeadlockDetect.cpp
index 7f703416c..3bb897221 100644
--- a/src/DeadlockDetect.cpp
+++ b/src/DeadlockDetect.cpp
@@ -13,7 +13,7 @@
 
 
 
-/// Number of milliseconds per cycle
+/** Number of milliseconds per cycle */
 const int CYCLE_MILLISECONDS = 100;
 
 
@@ -87,7 +87,7 @@ void cDeadlockDetect::Execute(void)
 		} Checker(this);
 		cRoot::Get()->ForEachWorld(Checker);
 		
-		cSleep::MilliSleep(CYCLE_MILLISECONDS);
+		std::this_thread::sleep_for(std::chrono::milliseconds(CYCLE_MILLISECONDS));
 	}  // while (should run)
 }
 
@@ -119,7 +119,7 @@ void cDeadlockDetect::CheckWorldAge(const AString & a_WorldName, Int64 a_Age)
 	if (WorldAge.m_Age == a_Age)
 	{
 		WorldAge.m_NumCyclesSame += 1;
-		if (WorldAge.m_NumCyclesSame > (1000 * m_IntervalSec) / CYCLE_MILLISECONDS)
+		if (WorldAge.m_NumCyclesSame > (m_IntervalSec * 1000) / CYCLE_MILLISECONDS)
 		{
 			DeadlockDetected();
 		}
diff --git a/src/DeadlockDetect.h b/src/DeadlockDetect.h
index 6aa98acbb..57027e923 100644
--- a/src/DeadlockDetect.h
+++ b/src/DeadlockDetect.h
@@ -28,7 +28,7 @@ class cDeadlockDetect :
 public:
 	cDeadlockDetect(void);
 	
-	/// Starts the detection. Hides cIsThread's Start, because we need some initialization
+	/** Starts the detection. Hides cIsThread's Start, because we need some initialization */
 	bool Start(int a_IntervalSec);
 	
 protected:
diff --git a/src/Enchantments.cpp b/src/Enchantments.cpp
index 80a9810b6..36c451b81 100644
--- a/src/Enchantments.cpp
+++ b/src/Enchantments.cpp
@@ -6,7 +6,7 @@
 #include "Enchantments.h"
 #include "WorldStorage/FastNBT.h"
 #include "FastRandom.h"
-#include "Noise.h"
+#include "Noise/Noise.h"
 
 
 
diff --git a/src/Entities/Entity.cpp b/src/Entities/Entity.cpp
index afc61c73f..54b9f2a20 100644
--- a/src/Entities/Entity.cpp
+++ b/src/Entities/Entity.cpp
@@ -665,7 +665,10 @@ int cEntity::GetArmorCoverAgainst(const cEntity * a_Attacker, eDamageType a_Dama
 	// Returns the hitpoints out of a_RawDamage that the currently equipped armor would cover
 	
 	// Filter out damage types that are not protected by armor:
-	if (!ArmorCoversAgainst(a_DamageType)) return 0;
+	if (!ArmorCoversAgainst(a_DamageType))
+	{
+		return 0;
+	}
 	
 	// Add up all armor points:
 	// Ref.: http://www.minecraftwiki.net/wiki/Armor#Defense_points as of 2012_12_20
@@ -1011,9 +1014,18 @@ void cEntity::HandlePhysics(float a_Dt, cChunk & a_Chunk)
 				// Block hit was within our projected path
 				// Begin by stopping movement in the direction that we hit something. The Normal is the line perpendicular to a 2D face and in this case, stores what block face was hit through either -1 or 1.
 				// For example: HitNormal.y = -1 : BLOCK_FACE_YM; HitNormal.y = 1 : BLOCK_FACE_YP
-				if (Tracer.HitNormal.x != 0.f) NextSpeed.x = 0.f;
-				if (Tracer.HitNormal.y != 0.f) NextSpeed.y = 0.f;
-				if (Tracer.HitNormal.z != 0.f) NextSpeed.z = 0.f;
+				if (Tracer.HitNormal.x != 0.f)
+				{
+					NextSpeed.x = 0.f;
+				}
+				if (Tracer.HitNormal.y != 0.f)
+				{
+					NextSpeed.y = 0.f;
+				}
+				if (Tracer.HitNormal.z != 0.f)
+				{
+					NextSpeed.z = 0.f;
+				}
 
 				if (Tracer.HitNormal.y == 1.f)  // Hit BLOCK_FACE_YP, we are on the ground
 				{
@@ -1276,7 +1288,7 @@ bool cEntity::DetectPortal()
 					return false;
 				}
 
-				if (IsPlayer() && !((cPlayer *)this)->IsGameModeCreative() && m_PortalCooldownData.m_TicksDelayed != 80)
+				if (IsPlayer() && !((cPlayer *)this)->IsGameModeCreative() && (m_PortalCooldownData.m_TicksDelayed != 80))
 				{
 					// Delay teleportation for four seconds if the entity is a non-creative player
 					m_PortalCooldownData.m_TicksDelayed++;
diff --git a/src/Entities/Minecart.cpp b/src/Entities/Minecart.cpp
index 22e046800..fac4f0714 100644
--- a/src/Entities/Minecart.cpp
+++ b/src/Entities/Minecart.cpp
@@ -142,8 +142,13 @@ void cMinecart::HandlePhysics(float a_Dt, cChunk & a_Chunk)
 
 	if (!IsBlockRail(InsideType))
 	{
-		Chunk->GetBlockTypeMeta(RelPosX, PosY + 1, RelPosZ, InsideType, InsideMeta);  // When an descending minecart hits a flat rail, it goes through the ground; check for this
-		if (IsBlockRail(InsideType)) AddPosY(1);  // Push cart upwards
+		// When a descending minecart hits a flat rail, it goes through the ground; check for this
+		Chunk->GetBlockTypeMeta(RelPosX, PosY + 1, RelPosZ, InsideType, InsideMeta);
+		if (IsBlockRail(InsideType))
+		{
+			// Push cart upwards
+			AddPosY(1);
+		}
 	}
 
 	bool WasDetectorRail = false;
@@ -218,7 +223,10 @@ void cMinecart::HandleRailPhysics(NIBBLETYPE a_RailMeta, float a_Dt)
 
 			// Execute both the entity and block collision checks
 			bool BlckCol = TestBlockCollision(a_RailMeta), EntCol = TestEntityCollision(a_RailMeta);
-			if (EntCol || BlckCol) return;
+			if (EntCol || BlckCol)
+			{
+				return;
+			}
 			
 			if (GetSpeedZ() != NO_SPEED)  // Don't do anything if cart is stationary
 			{
@@ -243,7 +251,10 @@ void cMinecart::HandleRailPhysics(NIBBLETYPE a_RailMeta, float a_Dt)
 			SetSpeedZ(NO_SPEED);
 
 			bool BlckCol = TestBlockCollision(a_RailMeta), EntCol = TestEntityCollision(a_RailMeta);
-			if (EntCol || BlckCol) return;
+			if (EntCol || BlckCol)
+			{
+				return;
+			}
 
 			if (GetSpeedX() != NO_SPEED)
 			{
@@ -422,7 +433,10 @@ void cMinecart::HandlePoweredRailPhysics(NIBBLETYPE a_RailMeta)
 			SetSpeedX(0);
 
 			bool BlckCol = TestBlockCollision(a_RailMeta), EntCol = TestEntityCollision(a_RailMeta);
-			if (EntCol || BlckCol) return;
+			if (EntCol || BlckCol)
+			{
+				return;
+			}
 			
 			if (GetSpeedZ() != NO_SPEED)
 			{
@@ -445,7 +459,10 @@ void cMinecart::HandlePoweredRailPhysics(NIBBLETYPE a_RailMeta)
 			SetSpeedZ(NO_SPEED);
 
 			bool BlckCol = TestBlockCollision(a_RailMeta), EntCol = TestEntityCollision(a_RailMeta);
-			if (EntCol || BlckCol) return;
+			if (EntCol || BlckCol)
+			{
+				return;
+			}
 
 			if (GetSpeedX() != NO_SPEED)
 			{
diff --git a/src/Entities/Minecart.h b/src/Entities/Minecart.h
index 40e22c641..f7d0d5dda 100644
--- a/src/Entities/Minecart.h
+++ b/src/Entities/Minecart.h
@@ -128,7 +128,7 @@ public:
 	};
 	
 	const cItem & GetSlot(int a_Idx) const { return m_Contents.GetSlot(a_Idx); }
-	void SetSlot(size_t a_Idx, const cItem & a_Item) { m_Contents.SetSlot(a_Idx, a_Item); }
+	void SetSlot(size_t a_Idx, const cItem & a_Item) { m_Contents.SetSlot(static_cast<int>(a_Idx), a_Item); }
 
 protected:
 	cItemGrid m_Contents;
diff --git a/src/Entities/Player.cpp b/src/Entities/Player.cpp
index 5c18d8f96..8d2eb1e5f 100644
--- a/src/Entities/Player.cpp
+++ b/src/Entities/Player.cpp
@@ -11,7 +11,6 @@
 #include "../BlockEntities/BlockEntity.h"
 #include "../BlockEntities/EnderChestEntity.h"
 #include "../Root.h"
-#include "../OSSupport/Timer.h"
 #include "../Chunk.h"
 #include "../Items/ItemHandler.h"
 #include "../Vector3.h"
@@ -27,7 +26,7 @@
 #define PLAYER_INVENTORY_SAVE_INTERVAL 6000
 
 // 1000 = once per second
-#define PLAYER_LIST_TIME_MS 1000
+#define PLAYER_LIST_TIME_MS std::chrono::milliseconds(1000)
 
 
 
@@ -91,9 +90,7 @@ cPlayer::cPlayer(cClientHandle* a_Client, const AString & a_PlayerName) :
 	SetMaxHealth(MAX_HEALTH);
 	m_Health = MAX_HEALTH;
 	
-	cTimer t1;
-	m_LastPlayerListTime = t1.GetNowTime();
-	
+	m_LastPlayerListTime = std::chrono::steady_clock::now();
 	m_PlayerName = a_PlayerName;
 
 	cWorld * World = nullptr;
@@ -120,6 +117,11 @@ cPlayer::cPlayer(cClientHandle* a_Client, const AString & a_PlayerName) :
 		{
 			m_CanFly = true;
 		}
+		if (World->IsGameModeSpectator())  // Otherwise Player will fall out of the world on join
+		{
+			m_CanFly = true;
+			m_IsFlying = true;
+		}
 	}
 	
 	cRoot::Get()->GetServer()->PlayerCreated(this);
@@ -263,11 +265,10 @@ void cPlayer::Tick(float a_Dt, cChunk & a_Chunk)
 	m_Inventory.UpdateItems();
 
 	// Send Player List (Once per m_LastPlayerListTime/1000 ms)
-	cTimer t1;
-	if (m_LastPlayerListTime + PLAYER_LIST_TIME_MS <= t1.GetNowTime())
+	if (m_LastPlayerListTime + PLAYER_LIST_TIME_MS <= std::chrono::steady_clock::now())
 	{
 		m_World->BroadcastPlayerListUpdatePing(*this);
-		m_LastPlayerListTime = t1.GetNowTime();
+		m_LastPlayerListTime = std::chrono::steady_clock::now();
 	}
 
 	if (IsFlying())
@@ -358,7 +359,7 @@ float cPlayer::GetXpPercentage()
 
 bool cPlayer::SetCurrentExperience(short int a_CurrentXp)
 {
-	if (!(a_CurrentXp >= 0) || (a_CurrentXp > (SHRT_MAX - m_LifetimeTotalXp)))
+	if (!(a_CurrentXp >= 0) || (a_CurrentXp > (std::numeric_limits<short>().max() - m_LifetimeTotalXp)))
 	{
 		LOGWARNING("Tried to update experiece with an invalid Xp value: %d", a_CurrentXp);
 		return false;  // oops, they gave us a dodgey number
@@ -378,18 +379,17 @@ bool cPlayer::SetCurrentExperience(short int a_CurrentXp)
 
 short cPlayer::DeltaExperience(short a_Xp_delta)
 {
-	if (a_Xp_delta > (SHRT_MAX - m_CurrentXp))
+	if (a_Xp_delta > (std::numeric_limits<short>().max() - m_CurrentXp))
 	{
 		// Value was bad, abort and report
-		LOGWARNING("Attempt was made to increment Xp by %d, which overflowed the short datatype. Ignoring.",
-			a_Xp_delta);
+		LOGWARNING("Attempt was made to increment Xp by %d, which overflowed the short datatype. Ignoring.", a_Xp_delta);
 		return -1;  // Should we instead just return the current Xp?
 	}
 
 	m_CurrentXp += a_Xp_delta;
 
 	// Make sure they didn't subtract too much
-	m_CurrentXp = std::max<short int>(m_CurrentXp, 0);
+	m_CurrentXp = std::max<short>(m_CurrentXp, 0);
 
 	// Update total for score calculation
 	if (a_Xp_delta > 0)
@@ -397,8 +397,7 @@ short cPlayer::DeltaExperience(short a_Xp_delta)
 		m_LifetimeTotalXp += a_Xp_delta;
 	}
 
-	LOGD("Player \"%s\" gained/lost %d experience, total is now: %d",
-		GetName().c_str(), a_Xp_delta, m_CurrentXp);
+	LOGD("Player \"%s\" gained/lost %d experience, total is now: %d", GetName().c_str(), a_Xp_delta, m_CurrentXp);
 
 	// Set experience to be updated
 	m_bDirtyExperience = true;
@@ -1074,7 +1073,7 @@ bool cPlayer::IsGameModeAdventure(void) const
 bool cPlayer::IsGameModeSpectator(void) const
 {
 	return (m_GameMode == gmSpectator) ||  // Either the player is explicitly in Spectator
-		((m_GameMode == gmNotSet) &&  m_World->IsGameModeSpectator());  // or they inherit from the world and the world is Adventure
+		((m_GameMode == gmNotSet) &&  m_World->IsGameModeSpectator());  // or they inherit from the world and the world is Spectator
 }
 
 
@@ -1602,6 +1601,9 @@ bool cPlayer::DoMoveToWorld(cWorld * a_World, bool a_ShouldSendRespawn)
 	a_World->AddPlayer(this);
 	SetWorld(a_World);  // Chunks may be streamed before cWorld::AddPlayer() sets the world to the new value
 
+	// Update the view distance.
+	m_ClientHandle->SetViewDistance(m_ClientHandle->GetRequestedViewDistance());
+
 	return true;
 }
 
@@ -1890,8 +1892,8 @@ void cPlayer::UseEquippedItem(int a_Amount)
 
 void cPlayer::TickBurning(cChunk & a_Chunk)
 {
-	// Don't burn in creative and stop burning in creative if necessary
-	if (!IsGameModeCreative())
+	// Don't burn in creative or spectator and stop burning in creative if necessary
+	if (!IsGameModeCreative() && !IsGameModeSpectator())
 	{
 		super::TickBurning(a_Chunk);
 	}
@@ -1910,9 +1912,9 @@ void cPlayer::HandleFood(void)
 {
 	// Ref.: http://www.minecraftwiki.net/wiki/Hunger
 
-	if (IsGameModeCreative())
+	if (IsGameModeCreative() || IsGameModeSpectator())
 	{
-		// Hunger is disabled for Creative
+		// Hunger is disabled for Creative and Spectator
 		return;
 	}
 
@@ -2077,7 +2079,7 @@ void cPlayer::UpdateMovementStats(const Vector3d & a_DeltaPos)
 
 void cPlayer::ApplyFoodExhaustionFromMovement()
 {
-	if (IsGameModeCreative())
+	if (IsGameModeCreative() || IsGameModeSpectator())
 	{
 		return;
 	}
diff --git a/src/Entities/Player.h b/src/Entities/Player.h
index 4bb51b556..c643aaa8e 100644
--- a/src/Entities/Player.h
+++ b/src/Entities/Player.h
@@ -516,7 +516,7 @@ protected:
 	/** The item being dragged by the cursor while in a UI window */
 	cItem m_DraggingItem;
 
-	long long m_LastPlayerListTime;
+	std::chrono::steady_clock::time_point m_LastPlayerListTime;
 
 	cClientHandle * m_ClientHandle;
 	
diff --git a/src/FastRandom.cpp b/src/FastRandom.cpp
index 42bf5f3f9..515dc25ea 100644
--- a/src/FastRandom.cpp
+++ b/src/FastRandom.cpp
@@ -4,13 +4,15 @@
 // Implements the cFastRandom class representing a fast random number generator
 
 #include "Globals.h"
-#include <time.h>
 #include "FastRandom.h"
 
 
 
 
 
+////////////////////////////////////////////////////////////////////////////////
+// cFastRandom:
+
 #if 0 && defined(_DEBUG)
 // Self-test
 // Both ints and floats are quick-tested to see if the random is calculated correctly, checking the range in ASSERTs,
@@ -83,16 +85,8 @@ public:
 
 
 
-
-int cFastRandom::m_SeedCounter = 0;
-
-
-
-
-
 cFastRandom::cFastRandom(void) :
-	m_Seed(m_SeedCounter++),
-	m_Counter(0)
+	m_LinearRand(static_cast<unsigned>(std::chrono::system_clock::now().time_since_epoch().count()))
 {
 }
 
@@ -102,82 +96,96 @@ cFastRandom::cFastRandom(void) :
 
 int cFastRandom::NextInt(int a_Range)
 {
-	ASSERT(a_Range <= 1000000);  // The random is not sufficiently linearly distributed with bigger ranges
-	ASSERT(a_Range > 0);
-	
-	// Make the m_Counter operations as minimal as possible, to emulate atomicity
-	int Counter = m_Counter++;
-	
-	// Use a_Range, m_Counter and m_Seed as inputs to the pseudorandom function:
-	int n = a_Range + Counter * 57 + m_Seed * 57 * 57;
-	n = (n << 13) ^ n;
-	n = ((n * (n * n * 15731 + 789221) + 1376312589) & 0x7fffffff);
-	return ((n / 11) % a_Range);
+	std::uniform_int_distribution<> distribution(0, a_Range - 1);
+	return distribution(m_LinearRand);
 }
 
 
 
 
 
+
 int cFastRandom::NextInt(int a_Range, int a_Salt)
 {
-	ASSERT(a_Range <= 1000000);  // The random is not sufficiently linearly distributed with bigger ranges
-	ASSERT(a_Range > 0);
-	
-	// Make the m_Counter operations as minimal as possible, to emulate atomicity
-	int Counter = m_Counter++;
-	
-	// Use a_Range, a_Salt, m_Counter and m_Seed as inputs to the pseudorandom function:
-	int n = a_Range + Counter * 57 + m_Seed * 57 * 57 + a_Salt * 57 * 57 * 57;
-	n = (n << 13) ^ n;
-	n = ((n * (n * n * 15731 + 789221) + 1376312589) & 0x7fffffff);
-	return ((n / 11) % a_Range);
+	m_LinearRand.seed(a_Salt);
+	std::uniform_int_distribution<> distribution(0, a_Range - 1);
+	return distribution(m_LinearRand);
 }
 
 
 
 
 
+
 float cFastRandom::NextFloat(float a_Range)
 {
-	// Make the m_Counter operations as minimal as possible, to emulate atomicity
-	int Counter = m_Counter++;
-	
-	// Use a_Range, a_Salt, m_Counter and m_Seed as inputs to the pseudorandom function:
-	int n = (int)a_Range + Counter * 57 + m_Seed * 57 * 57;
-	n = (n << 13) ^ n;
-	n = ((n * (n * n * 15731 + 789221) + 1376312589) & 0x7fffffff);
-	
-	// Convert the integer into float with the specified range:
-	return (((float)n / (float)0x7fffffff) * a_Range);
+	std::uniform_real_distribution<float> distribution(0, a_Range);
+	return distribution(m_LinearRand);
 }
 
 
 
 
 
+
 float cFastRandom::NextFloat(float a_Range, int a_Salt)
 {
-	// Make the m_Counter operations as minimal as possible, to emulate atomicity
-	int Counter = m_Counter++;
-	
-	// Use a_Range, a_Salt, m_Counter and m_Seed as inputs to the pseudorandom function:
-	int n = (int)a_Range + Counter * 57 + m_Seed * 57 * 57 + a_Salt * 57 * 57 * 57;
-	n = (n << 13) ^ n;
-	n = ((n * (n * n * 15731 + 789221) + 1376312589) & 0x7fffffff);
-	
-	// Convert the integer into float with the specified range:
-	return (((float)n / (float)0x7fffffff) * a_Range);
+	m_LinearRand.seed(a_Salt);
+	std::uniform_real_distribution<float> distribution(0, a_Range);
+	return distribution(m_LinearRand);
 }
 
 
 
 
 
+
 int cFastRandom::GenerateRandomInteger(int a_Begin, int a_End)
 {
-	cFastRandom Random;
-	return Random.NextInt(a_End - a_Begin + 1) + a_Begin;
+	std::uniform_int_distribution<> distribution(a_Begin, a_End);
+	return distribution(m_LinearRand);
+}
+
+
+
+
+
+////////////////////////////////////////////////////////////////////////////////
+// MTRand:
+
+MTRand::MTRand() :
+	m_MersenneRand(static_cast<unsigned>(std::chrono::system_clock::now().time_since_epoch().count()))
+{
+}
+
+
+
+
+
+int MTRand::randInt(int a_Range)
+{
+	std::uniform_int_distribution<> distribution(0, a_Range);
+	return distribution(m_MersenneRand);
+}
+
+
+
+
+
+int MTRand::randInt()
+{
+	std::uniform_int_distribution<> distribution(0, std::numeric_limits<int>::max());
+	return distribution(m_MersenneRand);
+}
+
+
+
+
+
+double MTRand::rand(double a_Range)
+{
+	std::uniform_real_distribution<> distribution(0, a_Range);
+	return distribution(m_MersenneRand);
 }
 
 
diff --git a/src/FastRandom.h b/src/FastRandom.h
index cebebad96..64a087c97 100644
--- a/src/FastRandom.h
+++ b/src/FastRandom.h
@@ -22,6 +22,7 @@ salts, the values they get will be different.
 
 
 #pragma once
+#include <random>
 
 
 
@@ -30,18 +31,19 @@ salts, the values they get will be different.
 class cFastRandom
 {
 public:
+
 	cFastRandom(void);
 	
-	/// Returns a random int in the range [0 .. a_Range - 1]; a_Range must be less than 1M
+	/** Returns a random int in the range [0 .. a_Range - 1]; a_Range must be less than 1M */
 	int NextInt(int a_Range);
 
-	/// Returns a random int in the range [0 .. a_Range - 1]; a_Range must be less than 1M; a_Salt is additional source of randomness
+	/** Returns a random int in the range [0 .. a_Range - 1]; a_Range must be less than 1M; a_Salt is additional source of randomness */
 	int NextInt(int a_Range, int a_Salt);
 	
-	/// Returns a random float in the range [0 .. a_Range]; a_Range must be less than 1M
+	/** Returns a random float in the range [0 .. a_Range]; a_Range must be less than 1M */
 	float NextFloat(float a_Range);
 
-	/// Returns a random float in the range [0 .. a_Range]; a_Range must be less than 1M; a_Salt is additional source of randomness
+	/** Returns a random float in the range [0 .. a_Range]; a_Range must be less than 1M; a_Salt is additional source of randomness */
 	float NextFloat(float a_Range, int a_Salt);
 
 	/** Returns a random float between 0 and 1. */
@@ -49,14 +51,35 @@ public:
 
 	/** Returns a random int in the range [a_Begin .. a_End] */
 	int GenerateRandomInteger(int a_Begin, int a_End);
-	
-protected:
-	int m_Seed;
-	int m_Counter;
-	
-	/// Counter that is used to initialize the seed, incremented for each object created
-	static int m_SeedCounter;
-} ;
+
+private:
+
+	std::minstd_rand m_LinearRand;
+};
+
+
+
+
+
+class MTRand
+{
+public:
+
+	MTRand(void);
+
+	/** Returns a random integer in the range [0 .. a_Range]. */
+	int randInt(int a_Range);
+
+	/** Returns a random integer in the range [0 .. MAX_INT]. */
+	int randInt(void);
+
+	/** Returns a random floating point number in the range [0 .. a_Range]. */
+	double rand(double a_Range);
+
+private:
+
+	std::mt19937 m_MersenneRand;
+};
 
 
 
diff --git a/src/FurnaceRecipe.cpp b/src/FurnaceRecipe.cpp
index 9b3b2ecbe..112aa8146 100644
--- a/src/FurnaceRecipe.cpp
+++ b/src/FurnaceRecipe.cpp
@@ -115,7 +115,7 @@ void cFurnaceRecipe::AddFuelFromLine(const AString & a_Line, unsigned int a_Line
 	Line.erase(Line.begin());  // Remove the beginning "!"
 	Line.erase(std::remove_if(Line.begin(), Line.end(), isspace), Line.end());
 
-	std::auto_ptr<cItem> Item(new cItem);
+	std::unique_ptr<cItem> Item(new cItem);
 	int BurnTime;
 
 	const AStringVector & Sides = StringSplit(Line, "=");
@@ -157,8 +157,8 @@ void cFurnaceRecipe::AddRecipeFromLine(const AString & a_Line, unsigned int a_Li
 	Line.erase(std::remove_if(Line.begin(), Line.end(), isspace), Line.end());
 
 	int CookTime = 200;
-	std::auto_ptr<cItem> InputItem(new cItem());
-	std::auto_ptr<cItem> OutputItem(new cItem());
+	std::unique_ptr<cItem> InputItem(new cItem());
+	std::unique_ptr<cItem> OutputItem(new cItem());
 
 	const AStringVector & Sides = StringSplit(Line, "=");
 	if (Sides.size() != 2)
diff --git a/src/Generating/BioGen.cpp b/src/Generating/BioGen.cpp
index 203faff56..2a4dbe794 100644
--- a/src/Generating/BioGen.cpp
+++ b/src/Generating/BioGen.cpp
@@ -5,6 +5,10 @@
 
 #include "Globals.h"
 #include "BioGen.h"
+#include <chrono>
+#include <iostream>
+#include "IntGen.h"
+#include "ProtIntGen.h"
 #include "../IniFile.h"
 #include "../LinearUpscale.h"
 
@@ -917,6 +921,214 @@ void cBioGenTwoLevel::InitializeBiomeGen(cIniFile & a_IniFile)
 
 
 ////////////////////////////////////////////////////////////////////////////////
+// cBioGenGrown:
+
+class cBioGenGrown:
+	public cBiomeGen
+{
+public:
+	cBioGenGrown(int a_Seed)
+	{
+		auto FinalRivers =
+			std::make_shared<cIntGenSmooth<8>>   (a_Seed + 1,
+			std::make_shared<cIntGenZoom  <10>>  (a_Seed + 2,
+			std::make_shared<cIntGenRiver <7>>   (a_Seed + 3,
+			std::make_shared<cIntGenZoom  <9>>   (a_Seed + 4,
+			std::make_shared<cIntGenSmooth<6>>   (a_Seed + 5,
+			std::make_shared<cIntGenZoom  <8>>   (a_Seed + 8,
+			std::make_shared<cIntGenSmooth<6>>   (a_Seed + 5,
+			std::make_shared<cIntGenZoom  <8>>   (a_Seed + 9,
+			std::make_shared<cIntGenSmooth<6>>   (a_Seed + 5,
+			std::make_shared<cIntGenZoom  <8>>   (a_Seed + 10,
+			std::make_shared<cIntGenSmooth<6>>   (a_Seed + 5,
+			std::make_shared<cIntGenSmooth<8>>   (a_Seed + 6,
+			std::make_shared<cIntGenZoom  <10>>  (a_Seed + 11,
+			std::make_shared<cIntGenChoice<2, 7>>(a_Seed + 12
+		))))))))))))));
+
+		auto alteration =
+			std::make_shared<cIntGenZoom     <8>>(a_Seed,
+			std::make_shared<cIntGenLandOcean<6>>(a_Seed, 20
+		));
+
+		auto alteration2 =
+			std::make_shared<cIntGenZoom     <8>>(a_Seed + 1,
+			std::make_shared<cIntGenZoom     <6>>(a_Seed + 2,
+			std::make_shared<cIntGenZoom     <5>>(a_Seed + 1,
+			std::make_shared<cIntGenZoom     <4>>(a_Seed + 2,
+			std::make_shared<cIntGenLandOcean<4>>(a_Seed + 1, 10
+		)))));
+
+		auto FinalBiomes =
+			std::make_shared<cIntGenSmooth         <8>> (a_Seed + 1,
+			std::make_shared<cIntGenZoom           <10>>(a_Seed + 15,
+			std::make_shared<cIntGenSmooth         <7>> (a_Seed + 1,
+			std::make_shared<cIntGenZoom           <9>> (a_Seed + 16,
+			std::make_shared<cIntGenBeaches        <6>> (
+			std::make_shared<cIntGenZoom           <8>> (a_Seed + 1,
+			std::make_shared<cIntGenAddIslands     <6>> (a_Seed + 2004, 10,
+			std::make_shared<cIntGenAddToOcean     <6>> (a_Seed + 10, 500, biDeepOcean,
+			std::make_shared<cIntGenReplaceRandomly<8>> (a_Seed + 1, biPlains, biSunflowerPlains, 20,
+			std::make_shared<cIntGenMBiomes        <8>> (a_Seed + 5, alteration2,
+			std::make_shared<cIntGenAlternateBiomes<8>> (a_Seed + 1, alteration,
+			std::make_shared<cIntGenBiomeEdges     <8>> (a_Seed + 3,
+			std::make_shared<cIntGenZoom           <10>>(a_Seed + 2,
+			std::make_shared<cIntGenZoom           <7>> (a_Seed + 4,
+			std::make_shared<cIntGenReplaceRandomly<5>> (a_Seed + 99, biIcePlains, biIcePlainsSpikes, 50,
+			std::make_shared<cIntGenZoom           <5>> (a_Seed + 8,
+			std::make_shared<cIntGenAddToOcean     <4>> (a_Seed + 10, 300, biDeepOcean,
+			std::make_shared<cIntGenAddToOcean     <6>> (a_Seed + 9, 8, biMushroomIsland,
+			std::make_shared<cIntGenBiomes         <8>> (a_Seed + 3000,
+			std::make_shared<cIntGenAddIslands     <8>> (a_Seed + 2000, 200,
+			std::make_shared<cIntGenZoom           <8>> (a_Seed + 5,
+			std::make_shared<cIntGenRareBiomeGroups<6>> (a_Seed + 5, 50,
+			std::make_shared<cIntGenBiomeGroupEdges<6>> (
+			std::make_shared<cIntGenAddIslands     <8>> (a_Seed + 2000, 200,
+			std::make_shared<cIntGenZoom           <8>> (a_Seed + 7,
+			std::make_shared<cIntGenSetRandomly    <6>> (a_Seed + 8, 50, bgOcean,
+			std::make_shared<cIntGenReplaceRandomly<6>> (a_Seed + 101, bgIce, bgTemperate, 150,
+			std::make_shared<cIntGenAddIslands     <6>> (a_Seed + 2000, 200,
+			std::make_shared<cIntGenSetRandomly    <6>> (a_Seed + 9, 50, bgOcean,
+			std::make_shared<cIntGenZoom           <6>> (a_Seed + 10,
+			std::make_shared<cIntGenLandOcean      <5>> (a_Seed + 100, 30
+		)))))))))))))))))))))))))))))));
+
+		m_Gen =
+			std::make_shared<cIntGenSmooth   <16>>(a_Seed,
+			std::make_shared<cIntGenZoom     <18>>(a_Seed,
+			std::make_shared<cIntGenSmooth   <11>>(a_Seed,
+			std::make_shared<cIntGenZoom     <13>>(a_Seed,
+			std::make_shared<cIntGenMixRivers<8>> (
+			FinalBiomes, FinalRivers
+		)))));
+	}
+
+	virtual void GenBiomes(int a_ChunkX, int a_ChunkZ, cChunkDef::BiomeMap & a_Biomes) override
+	{
+		cIntGen<16, 16>::Values vals;
+		m_Gen->GetInts(a_ChunkX * cChunkDef::Width, a_ChunkZ * cChunkDef::Width, vals);
+		for (int z = 0; z < cChunkDef::Width; z++)
+		{
+			for (int x = 0; x < cChunkDef::Width; x++)
+			{
+				cChunkDef::SetBiome(a_Biomes, x, z, (EMCSBiome)vals[x + cChunkDef::Width * z]);
+			}
+		}
+	}
+
+protected:
+	std::shared_ptr<cIntGen<16, 16>> m_Gen;
+};
+
+
+
+
+
+////////////////////////////////////////////////////////////////////////////////
+// cBioGenGrown:
+
+class cBioGenProtGrown:
+	public cBiomeGen
+{
+public:
+	cBioGenProtGrown(int a_Seed)
+	{
+		auto FinalRivers =
+			std::make_shared<cProtIntGenSmooth>(a_Seed + 1,
+			std::make_shared<cProtIntGenZoom  >(a_Seed + 2,
+			std::make_shared<cProtIntGenRiver >(a_Seed + 3,
+			std::make_shared<cProtIntGenZoom  >(a_Seed + 4,
+			std::make_shared<cProtIntGenSmooth>(a_Seed + 5,
+			std::make_shared<cProtIntGenZoom  >(a_Seed + 8,
+			std::make_shared<cProtIntGenSmooth>(a_Seed + 5,
+			std::make_shared<cProtIntGenZoom  >(a_Seed + 9,
+			std::make_shared<cProtIntGenSmooth>(a_Seed + 5,
+			std::make_shared<cProtIntGenZoom  >(a_Seed + 10,
+			std::make_shared<cProtIntGenSmooth>(a_Seed + 5,
+			std::make_shared<cProtIntGenSmooth>(a_Seed + 6,
+			std::make_shared<cProtIntGenZoom  >(a_Seed + 11,
+			std::make_shared<cProtIntGenChoice>(a_Seed + 12, 2
+		))))))))))))));
+
+		auto alteration =
+			std::make_shared<cProtIntGenZoom     >(a_Seed,
+			std::make_shared<cProtIntGenLandOcean>(a_Seed, 20
+		));
+
+		auto alteration2 =
+			std::make_shared<cProtIntGenZoom     >(a_Seed + 1,
+			std::make_shared<cProtIntGenZoom     >(a_Seed + 2,
+			std::make_shared<cProtIntGenZoom     >(a_Seed + 1,
+			std::make_shared<cProtIntGenZoom     >(a_Seed + 2,
+			std::make_shared<cProtIntGenLandOcean>(a_Seed + 1, 10
+		)))));
+
+		auto FinalBiomes =
+			std::make_shared<cProtIntGenSmooth         >(a_Seed + 1,
+			std::make_shared<cProtIntGenZoom           >(a_Seed + 15,
+			std::make_shared<cProtIntGenSmooth         >(a_Seed + 1,
+			std::make_shared<cProtIntGenZoom           >(a_Seed + 16,
+			std::make_shared<cProtIntGenBeaches        >(
+			std::make_shared<cProtIntGenZoom           >(a_Seed + 1,
+			std::make_shared<cProtIntGenAddIslands     >(a_Seed + 2004, 10,
+			std::make_shared<cProtIntGenAddToOcean     >(a_Seed + 10, 500, biDeepOcean,
+			std::make_shared<cProtIntGenReplaceRandomly>(a_Seed + 1, biPlains, biSunflowerPlains, 20,
+			std::make_shared<cProtIntGenMBiomes        >(a_Seed + 5, alteration2,
+			std::make_shared<cProtIntGenAlternateBiomes>(a_Seed + 1, alteration,
+			std::make_shared<cProtIntGenBiomeEdges     >(a_Seed + 3,
+			std::make_shared<cProtIntGenZoom           >(a_Seed + 2,
+			std::make_shared<cProtIntGenZoom           >(a_Seed + 4,
+			std::make_shared<cProtIntGenReplaceRandomly>(a_Seed + 99, biIcePlains, biIcePlainsSpikes, 50,
+			std::make_shared<cProtIntGenZoom           >(a_Seed + 8,
+			std::make_shared<cProtIntGenAddToOcean     >(a_Seed + 10, 300, biDeepOcean,
+			std::make_shared<cProtIntGenAddToOcean     >(a_Seed + 9, 8, biMushroomIsland,
+			std::make_shared<cProtIntGenBiomes         >(a_Seed + 3000,
+			std::make_shared<cProtIntGenAddIslands     >(a_Seed + 2000, 200,
+			std::make_shared<cProtIntGenZoom           >(a_Seed + 5,
+			std::make_shared<cProtIntGenRareBiomeGroups>(a_Seed + 5, 50,
+			std::make_shared<cProtIntGenBiomeGroupEdges>(
+			std::make_shared<cProtIntGenAddIslands     >(a_Seed + 2000, 200,
+			std::make_shared<cProtIntGenZoom           >(a_Seed + 7,
+			std::make_shared<cProtIntGenSetRandomly    >(a_Seed + 8, 50, bgOcean,
+			std::make_shared<cProtIntGenReplaceRandomly>(a_Seed + 101, bgIce, bgTemperate, 150,
+			std::make_shared<cProtIntGenAddIslands     >(a_Seed + 2000, 200,
+			std::make_shared<cProtIntGenSetRandomly    >(a_Seed + 9, 50, bgOcean,
+			std::make_shared<cProtIntGenZoom           >(a_Seed + 10,
+			std::make_shared<cProtIntGenLandOcean      >(a_Seed + 100, 30
+		)))))))))))))))))))))))))))))));
+
+		m_Gen =
+			std::make_shared<cProtIntGenSmooth   >(a_Seed,
+			std::make_shared<cProtIntGenZoom     >(a_Seed,
+			std::make_shared<cProtIntGenSmooth   >(a_Seed,
+			std::make_shared<cProtIntGenZoom     >(a_Seed,
+			std::make_shared<cProtIntGenMixRivers>(
+			FinalBiomes, FinalRivers
+		)))));
+	}
+
+	virtual void GenBiomes(int a_ChunkX, int a_ChunkZ, cChunkDef::BiomeMap & a_Biomes) override
+	{
+		int vals[16 * 16];
+		m_Gen->GetInts(a_ChunkX * cChunkDef::Width, a_ChunkZ * cChunkDef::Width, 16, 16, vals);
+		for (int z = 0; z < cChunkDef::Width; z++)
+		{
+			for (int x = 0; x < cChunkDef::Width; x++)
+			{
+				cChunkDef::SetBiome(a_Biomes, x, z, (EMCSBiome)vals[x + cChunkDef::Width * z]);
+			}
+		}
+	}
+
+protected:
+	std::shared_ptr<cProtIntGen> m_Gen;
+};
+
+
+
+
+
+////////////////////////////////////////////////////////////////////////////////
 // cBiomeGen:
 
 cBiomeGenPtr cBiomeGen::CreateBiomeGen(cIniFile & a_IniFile, int a_Seed, bool & a_CacheOffByDefault)
@@ -952,6 +1164,14 @@ cBiomeGenPtr cBiomeGen::CreateBiomeGen(cIniFile & a_IniFile, int a_Seed, bool &
 	{
 		res = new cBioGenTwoLevel(a_Seed);
 	}
+	else if (NoCaseCompare(BiomeGenName, "grown") == 0)
+	{
+		res = new cBioGenGrown(a_Seed);
+	}
+	else if (NoCaseCompare(BiomeGenName, "grownprot") == 0)
+	{
+		res = new cBioGenProtGrown(a_Seed);
+	}
 	else
 	{
 		if (NoCaseCompare(BiomeGenName, "multistepmap") != 0)
@@ -981,3 +1201,51 @@ cBiomeGenPtr cBiomeGen::CreateBiomeGen(cIniFile & a_IniFile, int a_Seed, bool &
 
 
 
+
+////////////////////////////////////////////////////////////////////////////////
+// Performance tests:
+
+// Change to 1 to enable the perf test:
+#if 0
+
+class cBioGenPerfTest
+{
+public:
+	cBioGenPerfTest()
+	{
+		std::cout << "BioGen performance tests commencing, please wait..." << std::endl;
+		TestGen("MultiStepMap", std::make_unique<cBioGenMultiStepMap>(1).get());
+		TestGen("Grown",        std::make_unique<cBioGenGrown>(1).get());
+		TestGen("GrownProt",    std::make_unique<cBioGenProtGrown>(1).get());
+		std::cout << "BioGen performance tests complete." << std::endl;
+	}
+
+protected:
+	void TestGen(const AString && a_GenName, cBiomeGen * a_BioGen)
+	{
+		// Initialize the default settings for the generator:
+		cIniFile iniFile;
+		a_BioGen->InitializeBiomeGen(iniFile);
+
+		// Generate the biomes:
+		auto start = std::chrono::system_clock::now();
+		for (int z = 0; z < 100; z++)
+		{
+			for (int x = 0; x < 100; x++)
+			{
+				cChunkDef::BiomeMap biomes;
+				a_BioGen->GenBiomes(x, z, biomes);
+			}  // for x
+		}  // for z
+		auto dur = std::chrono::system_clock::now() - start;
+		double milliseconds = static_cast<double>((std::chrono::duration_cast<std::chrono::milliseconds>(dur)).count());
+
+		std::cout << a_GenName << ": " << 1000.0 * 100.0 * 100.0 / milliseconds << " chunks per second" << std::endl;
+	}
+} g_BioGenPerfTest;
+
+#endif
+
+
+
+
diff --git a/src/Generating/BioGen.h b/src/Generating/BioGen.h
index 5fd0844d9..13fb40c5f 100644
--- a/src/Generating/BioGen.h
+++ b/src/Generating/BioGen.h
@@ -15,7 +15,7 @@ Interfaces to the various biome generators:
 #pragma once
 
 #include "ComposableGenerator.h"
-#include "../Noise.h"
+#include "../Noise/Noise.h"
 #include "../VoronoiMap.h"
 
 
diff --git a/src/Generating/CMakeLists.txt b/src/Generating/CMakeLists.txt
index cd3d5a9f3..a28510d40 100644
--- a/src/Generating/CMakeLists.txt
+++ b/src/Generating/CMakeLists.txt
@@ -10,6 +10,7 @@ SET (SRCS
 	ChunkDesc.cpp
 	ChunkGenerator.cpp
 	CompoGen.cpp
+	CompoGenBiomal.cpp
 	ComposableGenerator.cpp
 	DistortedHeightmap.cpp
 	DungeonRoomsFinisher.cpp
@@ -30,8 +31,10 @@ SET (SRCS
 	StructGen.cpp
 	TestRailsGen.cpp
 	Trees.cpp
+	TwoHeights.cpp
 	UnderwaterBaseGen.cpp
-	VillageGen.cpp)
+	VillageGen.cpp
+)
 
 SET (HDRS
 	BioGen.h
@@ -39,13 +42,16 @@ SET (HDRS
 	ChunkDesc.h
 	ChunkGenerator.h
 	CompoGen.h
+	CompoGenBiomal.h
 	ComposableGenerator.h
+	CompositedHeiGen.h
 	DistortedHeightmap.h
 	DungeonRoomsFinisher.h
 	EndGen.h
 	FinishGen.h
 	GridStructGen.h
 	HeiGen.h
+	IntGen.h
 	MineShafts.h
 	NetherFortGen.h
 	Noise3DGenerator.h
@@ -53,14 +59,18 @@ SET (HDRS
 	PieceGenerator.h
 	Prefab.h
 	PrefabPiecePool.h
+	ProtIntGen.h
 	RainbowRoadsGen.h
 	Ravines.h
 	RoughRavines.h
+	ShapeGen.cpp
 	StructGen.h
 	TestRailsGen.h
 	Trees.h
+	TwoHeights.h
 	UnderwaterBaseGen.h
-	VillageGen.h)
+	VillageGen.h
+)
 
 if(NOT MSVC)
 	add_library(Generating ${SRCS} ${HDRS})
diff --git a/src/Generating/Caves.cpp b/src/Generating/Caves.cpp
index fc925a150..e4735cb83 100644
--- a/src/Generating/Caves.cpp
+++ b/src/Generating/Caves.cpp
@@ -692,8 +692,14 @@ static float GetMarbleNoise( float x, float y, float z, cNoise & a_Noise)
 	float oct1 = (a_Noise.CubicNoise3D(x * 0.1f, y * 0.1f, z * 0.1f)) * 4;
 
 	oct1 = oct1 * oct1 * oct1;
-	if (oct1 < 0.f)  oct1 = PI_2;
-	if (oct1 > PI_2) oct1 = PI_2;
+	if (oct1 < 0.f)
+	{
+		oct1 = PI_2;
+	}
+	if (oct1 > PI_2)
+	{
+		oct1 = PI_2;
+	}
 
 	return oct1;
 }
diff --git a/src/Generating/Caves.h b/src/Generating/Caves.h
index 0e17acf9e..691ef3e62 100644
--- a/src/Generating/Caves.h
+++ b/src/Generating/Caves.h
@@ -13,7 +13,6 @@
 #pragma once
 
 #include "GridStructGen.h"
-#include "../Noise.h"
 
 
 
diff --git a/src/Generating/ChunkDesc.cpp b/src/Generating/ChunkDesc.cpp
index 020d3bd0f..4a5ac5a18 100644
--- a/src/Generating/ChunkDesc.cpp
+++ b/src/Generating/ChunkDesc.cpp
@@ -7,7 +7,7 @@
 #include "ChunkDesc.h"
 #include "../BlockArea.h"
 #include "../Cuboid.h"
-#include "../Noise.h"
+#include "../Noise/Noise.h"
 #include "../BlockEntities/BlockEntity.h"
 
 
@@ -152,6 +152,52 @@ int cChunkDesc::GetHeight(int a_RelX, int a_RelZ)
 
 
 
+void cChunkDesc::SetHeightFromShape(const Shape & a_Shape)
+{
+	for (int z = 0; z < cChunkDef::Width; z++)
+	{
+		for (int x = 0; x < cChunkDef::Width; x++)
+		{
+			for (int y = cChunkDef::Height - 1; y > 0; y--)
+			{
+				if (a_Shape[y + x * 256 + z * 16 * 256] != 0)
+				{
+					cChunkDef::SetHeight(m_HeightMap, x, z, y);
+					break;
+				}
+			}  // for y
+		}  // for x
+	}  // for z
+}
+
+
+
+
+
+void cChunkDesc::GetShapeFromHeight(Shape & a_Shape) const
+{
+	for (int z = 0; z < cChunkDef::Width; z++)
+	{
+		for (int x = 0; x < cChunkDef::Width; x++)
+		{
+			int height = cChunkDef::GetHeight(m_HeightMap, x, z);
+			for (int y = 0; y <= height; y++)
+			{
+				a_Shape[y + x * 256 + z * 16 * 256] = 1;
+			}
+			
+			for (int y = height + 1; y < cChunkDef::Height; y++)
+			{
+				a_Shape[y + x * 256 + z * 16 * 256] = 0;
+			}  // for y
+		}  // for x
+	}  // for z
+}
+
+
+
+
+
 void cChunkDesc::SetUseDefaultBiomes(bool a_bUseDefaultBiomes)
 {
 	m_bUseDefaultBiomes = a_bUseDefaultBiomes;
@@ -366,6 +412,23 @@ HEIGHTTYPE cChunkDesc::GetMaxHeight(void) const
 
 
 
+HEIGHTTYPE cChunkDesc::GetMinHeight(void) const
+{
+	HEIGHTTYPE MinHeight = m_HeightMap[0];
+	for (size_t i = 1; i < ARRAYCOUNT(m_HeightMap); i++)
+	{
+		if (m_HeightMap[i] < MinHeight)
+		{
+			MinHeight = m_HeightMap[i];
+		}
+	}
+	return MinHeight;
+}
+
+
+
+
+
 void cChunkDesc::FillRelCuboid(
 	int a_MinX, int a_MaxX,
 	int a_MinY, int a_MaxY,
diff --git a/src/Generating/ChunkDesc.h b/src/Generating/ChunkDesc.h
index 570132790..480106fb5 100644
--- a/src/Generating/ChunkDesc.h
+++ b/src/Generating/ChunkDesc.h
@@ -29,10 +29,17 @@ class cChunkDesc
 {
 public:
 	// tolua_end
+
+	/** The datatype used to represent the entire chunk worth of shape.
+	0 = air
+	1 = solid
+	Indexed as [y + 256 * x + 256 * 16 * z]. */
+	typedef Byte Shape[256 * 16 * 16];
 	
 	/** Uncompressed block metas, 1 meta per byte */
 	typedef NIBBLETYPE BlockNibbleBytes[cChunkDef::NumBlocks];
 	
+
 	cChunkDesc(int a_ChunkX, int a_ChunkZ);
 	~cChunkDesc();
 
@@ -57,10 +64,21 @@ public:
 	EMCSBiome  GetBiome(int a_RelX, int a_RelZ);
 
 	// These operate on the heightmap, so they could get out of sync with the data
-	// Use UpdateHeightmap() to re-sync
+	// Use UpdateHeightmap() to re-calculate heightmap from the block data
 	void       SetHeight(int a_RelX, int a_RelZ, int a_Height);
 	int        GetHeight(int a_RelX, int a_RelZ);
 
+	// tolua_end
+
+	/** Sets the heightmap to match the given shape data.
+	Note that this ignores overhangs; the method is mostly used by old composition generators. */
+	void SetHeightFromShape(const Shape & a_Shape);
+
+	/** Sets the shape in a_Shape to match the heightmap stored currently in m_HeightMap. */
+	void GetShapeFromHeight(Shape & a_Shape) const;
+
+	// tolua_begin
+
 	// Default generation:
 	void SetUseDefaultBiomes(bool a_bUseDefaultBiomes);
 	bool IsUsingDefaultBiomes(void) const;
@@ -77,8 +95,11 @@ public:
 	/** Reads an area from the chunk into a cBlockArea, blocktypes and blockmetas */
 	void ReadBlockArea(cBlockArea & a_Dest, int a_MinRelX, int a_MaxRelX, int a_MinRelY, int a_MaxRelY, int a_MinRelZ, int a_MaxRelZ);
 
-	/** Returns the maximum height value in the heightmap */
+	/** Returns the maximum height value in the heightmap. */
 	HEIGHTTYPE GetMaxHeight(void) const;
+
+	/** Returns the minimum height value in the heightmap. */
+	HEIGHTTYPE GetMinHeight(void) const;
 	
 	/** Fills the relative cuboid with specified block; allows cuboid out of range of this chunk */
 	void FillRelCuboid(
diff --git a/src/Generating/ChunkGenerator.cpp b/src/Generating/ChunkGenerator.cpp
index 92e1bb31d..854aac60d 100644
--- a/src/Generating/ChunkGenerator.cpp
+++ b/src/Generating/ChunkGenerator.cpp
@@ -6,7 +6,7 @@
 #include "ChunkDesc.h"
 #include "ComposableGenerator.h"
 #include "Noise3DGenerator.h"
-#include "../MersenneTwister.h"
+#include "FastRandom.h"
 
 
 
@@ -110,29 +110,19 @@ void cChunkGenerator::Stop(void)
 
 
 
-void cChunkGenerator::QueueGenerateChunk(int a_ChunkX, int a_ChunkZ, bool a_ForceGenerate)
+void cChunkGenerator::QueueGenerateChunk(int a_ChunkX, int a_ChunkZ, bool a_ForceGenerate, cChunkCoordCallback * a_Callback)
 {
 	ASSERT(m_ChunkSink->IsChunkQueued(a_ChunkX, a_ChunkZ));
 
 	{
 		cCSLock Lock(m_CS);
 
-		// Check if it is already in the queue:
-		for (cChunkCoordsWithBoolList::iterator itr = m_Queue.begin(); itr != m_Queue.end(); ++itr)
-		{
-			if ((itr->m_ChunkX == a_ChunkX) && (itr->m_ChunkZ == a_ChunkZ))
-			{
-				// Already in the queue, bail out
-				return;
-			}
-		}  // for itr - m_Queue[]
-
 		// Add to queue, issue a warning if too many:
 		if (m_Queue.size() >= QUEUE_WARNING_LIMIT)
 		{
 			LOGWARN("WARNING: Adding chunk [%i, %i] to generation queue; Queue is too big! (" SIZE_T_FMT ")", a_ChunkX, a_ChunkZ, m_Queue.size());
 		}
-		m_Queue.push_back(cChunkCoordsWithBool(a_ChunkX, a_ChunkZ, a_ForceGenerate));
+		m_Queue.push_back(cQueueItem{a_ChunkX, a_ChunkZ, a_ForceGenerate, a_Callback});
 	}
 
 	m_Event.Set();
@@ -191,13 +181,13 @@ EMCSBiome cChunkGenerator::GetBiomeAt(int a_BlockX, int a_BlockZ)
 BLOCKTYPE cChunkGenerator::GetIniBlock(cIniFile & a_IniFile, const AString & a_SectionName, const AString & a_ValueName, const AString & a_Default)
 {
 	AString BlockType = a_IniFile.GetValueSet(a_SectionName, a_ValueName, a_Default);
-	BLOCKTYPE Block = BlockStringToType(BlockType);
+	int Block = BlockStringToType(BlockType);
 	if (Block < 0)
 	{
 		LOGWARN("[%s].%s Could not parse block value \"%s\". Using default: \"%s\".", a_SectionName.c_str(), a_ValueName.c_str(), BlockType.c_str(), a_Default.c_str());
-		return BlockStringToType(a_Default);
+		return static_cast<BLOCKTYPE>(BlockStringToType(a_Default));
 	}
-	return Block;
+	return static_cast<BLOCKTYPE>(Block);
 }
 
 
@@ -242,9 +232,9 @@ void cChunkGenerator::Execute(void)
 			continue;
 		}
 
-		cChunkCoordsWithBool coords = m_Queue.front();  // Get next coord from queue
+		cQueueItem item = m_Queue.front();  // Get next chunk from the queue
 		bool SkipEnabled = (m_Queue.size() > QUEUE_SKIP_LIMIT);
-		m_Queue.erase(m_Queue.begin());  // Remove coordinate from queue
+		m_Queue.erase(m_Queue.begin());  // Remove the item from the queue
 		Lock.Unlock();  // Unlock ASAP
 		m_evtRemoved.Set();
 
@@ -258,22 +248,35 @@ void cChunkGenerator::Execute(void)
 			LastReportTick = clock();
 		}
 
-		if (!coords.m_ForceGenerate && m_ChunkSink->IsChunkValid(coords.m_ChunkX, coords.m_ChunkZ))
+		// Skip the chunk if it's already generated and regeneration is not forced:
+		if (!item.m_ForceGenerate && m_ChunkSink->IsChunkValid(item.m_ChunkX, item.m_ChunkZ))
 		{
-			LOGD("Chunk [%d, %d] already generated, skipping generation", coords.m_ChunkX, coords.m_ChunkZ);
-			// Already generated, ignore request
+			LOGD("Chunk [%d, %d] already generated, skipping generation", item.m_ChunkX, item.m_ChunkZ);
+			if (item.m_Callback != nullptr)
+			{
+				item.m_Callback->Call(item.m_ChunkX, item.m_ChunkZ);
+			}
 			continue;
 		}
 
-		if (SkipEnabled && !m_ChunkSink->HasChunkAnyClients(coords.m_ChunkX, coords.m_ChunkZ))
+		// Skip the chunk if the generator is overloaded:
+		if (SkipEnabled && !m_ChunkSink->HasChunkAnyClients(item.m_ChunkX, item.m_ChunkZ))
 		{
-			LOGWARNING("Chunk generator overloaded, skipping chunk [%d, %d]", coords.m_ChunkX, coords.m_ChunkZ);
+			LOGWARNING("Chunk generator overloaded, skipping chunk [%d, %d]", item.m_ChunkX, item.m_ChunkZ);
+			if (item.m_Callback != nullptr)
+			{
+				item.m_Callback->Call(item.m_ChunkX, item.m_ChunkZ);
+			}
 			continue;
 		}
 
-		LOGD("Generating chunk [%d, %d]", coords.m_ChunkX, coords.m_ChunkZ);
-		DoGenerate(coords.m_ChunkX, coords.m_ChunkZ);
-
+		// Generate the chunk:
+		LOGD("Generating chunk [%d, %d]", item.m_ChunkX, item.m_ChunkZ);
+		DoGenerate(item.m_ChunkX, item.m_ChunkZ);
+		if (item.m_Callback != nullptr)
+		{
+			item.m_Callback->Call(item.m_ChunkX, item.m_ChunkZ);
+		}
 		NumChunksGenerated++;
 	}  // while (!bStop)
 }
diff --git a/src/Generating/ChunkGenerator.h b/src/Generating/ChunkGenerator.h
index 190d9e616..4af486ae1 100644
--- a/src/Generating/ChunkGenerator.h
+++ b/src/Generating/ChunkGenerator.h
@@ -119,8 +119,12 @@ public:
 	bool Start(cPluginInterface & a_PluginInterface, cChunkSink & a_ChunkSink, cIniFile & a_IniFile);
 	void Stop(void);
 
-	/// Queues the chunk for generation; removes duplicate requests
-	void QueueGenerateChunk(int a_ChunkX, int a_ChunkZ, bool a_ForceGenerate);
+	/** Queues the chunk for generation
+	If a-ForceGenerate is set, the chunk is regenerated even if the data is already present in the chunksink.
+	a_Callback is called after the chunk is generated. If the chunk was already present, the callback is still called, even if not regenerating.
+	It is legal to set the callback to nullptr, no callback is called then.
+	If the generator becomes overloaded and skips this chunk, the callback is still called. */
+	void QueueGenerateChunk(int a_ChunkX, int a_ChunkZ, bool a_ForceGenerate, cChunkCoordCallback * a_Callback = nullptr);
 	
 	/// Generates the biomes for the specified chunk (directly, not in a separate thread). Used by the world loader if biomes failed loading.
 	void GenerateBiomes(int a_ChunkX, int a_ChunkZ, cChunkDef::BiomeMap & a_BiomeMap);
@@ -131,22 +135,46 @@ public:
 	
 	int GetSeed(void) const { return m_Seed; }
 	
-	/// Returns the biome at the specified coords. Used by ChunkMap if an invalid chunk is queried for biome
+	/** Returns the biome at the specified coords. Used by ChunkMap if an invalid chunk is queried for biome */
 	EMCSBiome GetBiomeAt(int a_BlockX, int a_BlockZ);
 
-	/// Reads a block type from the ini file; returns the blocktype on success, emits a warning and returns a_Default's representation on failure.
+	/** Reads a block type from the ini file; returns the blocktype on success, emits a warning and returns a_Default's representation on failure. */
 	static BLOCKTYPE GetIniBlock(cIniFile & a_IniFile, const AString & a_SectionName, const AString & a_ValueName, const AString & a_Default);
 	
 private:
 
+	struct cQueueItem
+	{
+		/** The chunk coords */
+		int m_ChunkX, m_ChunkZ;
+
+		/** Force the regeneration of an already existing chunk */
+		bool m_ForceGenerate;
+
+		/** Callback to call after generating.*/
+		cChunkCoordCallback * m_Callback;
+	};
+
+	typedef std::list<cQueueItem> cGenQueue;
+
+
+	/** Seed used for the generator. */
 	int m_Seed;
 
-	cCriticalSection         m_CS;
-	cChunkCoordsWithBoolList m_Queue;
-	cEvent                   m_Event;       ///< Set when an item is added to the queue or the thread should terminate
-	cEvent                   m_evtRemoved;  ///< Set when an item is removed from the queue
+	/** CS protecting access to the queue. */
+	cCriticalSection m_CS;
+
+	/** Queue of the chunks to be generated. Protected against multithreaded access by m_CS. */
+	cGenQueue m_Queue;
+
+	/** Set when an item is added to the queue or the thread should terminate. */
+	cEvent m_Event;
+
+	/** Set when an item is removed from the queue. */
+	cEvent m_evtRemoved;
 	
-	cGenerator * m_Generator;  ///< The actual generator engine used to generate chunks
+	/** The actual generator engine used to generate chunks. */
+	cGenerator * m_Generator;
 	
 	/** The plugin interface that may modify the generated chunks */
 	cPluginInterface * m_PluginInterface;
@@ -158,6 +186,7 @@ private:
 	// cIsThread override:
 	virtual void Execute(void) override;
 
+	/** Generates the specified chunk and sets it into the chunksink. */
 	void DoGenerate(int a_ChunkX, int a_ChunkZ);
 };
 
diff --git a/src/Generating/CompoGen.cpp b/src/Generating/CompoGen.cpp
index 29b831dfd..cb9c04fd7 100644
--- a/src/Generating/CompoGen.cpp
+++ b/src/Generating/CompoGen.cpp
@@ -21,8 +21,9 @@
 ////////////////////////////////////////////////////////////////////////////////
 // cCompoGenSameBlock:
 
-void cCompoGenSameBlock::ComposeTerrain(cChunkDesc & a_ChunkDesc)
+void cCompoGenSameBlock::ComposeTerrain(cChunkDesc & a_ChunkDesc, const cChunkDesc::Shape & a_Shape)
 {
+	a_ChunkDesc.SetHeightFromShape(a_Shape);
 	a_ChunkDesc.FillBlocks(E_BLOCK_AIR, 0);
 	for (int z = 0; z < cChunkDef::Width; z++)
 	{
@@ -63,7 +64,7 @@ void cCompoGenSameBlock::InitializeCompoGen(cIniFile & a_IniFile)
 ////////////////////////////////////////////////////////////////////////////////
 // cCompoGenDebugBiomes:
 
-void cCompoGenDebugBiomes::ComposeTerrain(cChunkDesc & a_ChunkDesc)
+void cCompoGenDebugBiomes::ComposeTerrain(cChunkDesc & a_ChunkDesc, const cChunkDesc::Shape & a_Shape)
 {
 	static BLOCKTYPE Blocks[] =
 	{
@@ -92,6 +93,7 @@ void cCompoGenDebugBiomes::ComposeTerrain(cChunkDesc & a_ChunkDesc)
 		E_BLOCK_BEDROCK,
 	} ;
 	
+	a_ChunkDesc.SetHeightFromShape(a_Shape);
 	a_ChunkDesc.FillBlocks(E_BLOCK_AIR, 0);
 
 	for (int z = 0; z < cChunkDef::Width; z++)
@@ -131,7 +133,7 @@ cCompoGenClassic::cCompoGenClassic(void) :
 
 
 
-void cCompoGenClassic::ComposeTerrain(cChunkDesc & a_ChunkDesc)
+void cCompoGenClassic::ComposeTerrain(cChunkDesc & a_ChunkDesc, const cChunkDesc::Shape & a_Shape)
 {
 	/* The classic composition means:
 		- 1 layer of grass, 3 of dirt and the rest stone, if the height > sealevel + beachheight
@@ -142,6 +144,7 @@ void cCompoGenClassic::ComposeTerrain(cChunkDesc & a_ChunkDesc)
 	*/
 
 	a_ChunkDesc.FillBlocks(E_BLOCK_AIR, 0);
+	a_ChunkDesc.SetHeightFromShape(a_Shape);
 
 	// The patterns to use for different situations, must be same length!
 	const BLOCKTYPE PatternGround[] = {m_BlockTop,    m_BlockMiddle, m_BlockMiddle, m_BlockMiddle} ;
@@ -194,7 +197,7 @@ void cCompoGenClassic::ComposeTerrain(cChunkDesc & a_ChunkDesc)
 
 void cCompoGenClassic::InitializeCompoGen(cIniFile & a_IniFile)
 {
-	m_SeaLevel         = a_IniFile.GetValueSetI("Generator", "ClassicSeaLevel",    m_SeaLevel);
+	m_SeaLevel         = a_IniFile.GetValueSetI("Generator", "SeaLevel",           m_SeaLevel);
 	m_BeachHeight      = a_IniFile.GetValueSetI("Generator", "ClassicBeachHeight", m_BeachHeight);
 	m_BeachDepth       = a_IniFile.GetValueSetI("Generator", "ClassicBeachDepth",  m_BeachDepth);
 	m_BlockTop         = (BLOCKTYPE)(GetIniItemSet(a_IniFile, "Generator", "ClassicBlockTop",         "grass").m_ItemType);
@@ -210,323 +213,6 @@ void cCompoGenClassic::InitializeCompoGen(cIniFile & a_IniFile)
 
 
 ////////////////////////////////////////////////////////////////////////////////
-// cCompoGenBiomal:
-
-void cCompoGenBiomal::ComposeTerrain(cChunkDesc & a_ChunkDesc)
-{
-	a_ChunkDesc.FillBlocks(E_BLOCK_AIR, 0);
-
-	int ChunkX = a_ChunkDesc.GetChunkX();
-	int ChunkZ = a_ChunkDesc.GetChunkZ();
-	
-	/*
-	_X 2013_04_22:
-	There's no point in generating the whole cubic noise at once, because the noise values are used in
-	only about 20 % of the cases, so the speed gained by precalculating is lost by precalculating too much data
-	*/
-	
-	for (int z = 0; z < cChunkDef::Width; z++)
-	{
-		for (int x = 0; x < cChunkDef::Width; x++)
-		{
-			int Height = a_ChunkDesc.GetHeight(x, z);
-			if (Height > m_SeaLevel)
-			{
-				switch (a_ChunkDesc.GetBiome(x, z))
-				{
-					case biOcean:
-					case biPlains:
-					case biExtremeHills:
-					case biForest:
-					case biTaiga:
-					case biSwampland:
-					case biRiver:
-					case biFrozenOcean:
-					case biFrozenRiver:
-					case biIcePlains:
-					case biIceMountains:
-					case biForestHills:
-					case biTaigaHills:
-					case biExtremeHillsEdge:
-					case biJungle:
-					case biJungleHills:
-					case biJungleEdge:
-					case biDeepOcean:
-					case biStoneBeach:
-					case biColdBeach:
-					case biBirchForest:
-					case biBirchForestHills:
-					case biRoofedForest:
-					case biColdTaiga:
-					case biColdTaigaHills:
-					case biExtremeHillsPlus:
-					case biSavanna:
-					case biSavannaPlateau:
-					case biSunflowerPlains:
-					case biExtremeHillsM:
-					case biFlowerForest:
-					case biTaigaM:
-					case biSwamplandM:
-					case biIcePlainsSpikes:
-					case biJungleM:
-					case biJungleEdgeM:
-					case biBirchForestM:
-					case biBirchForestHillsM:
-					case biRoofedForestM:
-					case biColdTaigaM:
-					case biExtremeHillsPlusM:
-					case biSavannaM:
-					case biSavannaPlateauM:
-					{
-						FillColumnGrass(x, z, Height, a_ChunkDesc.GetBlockTypes());
-						break;
-					}
-
-					case biMesa:
-					case biMesaPlateauF:
-					case biMesaPlateau:
-					case biMesaBryce:
-					case biMesaPlateauFM:
-					case biMesaPlateauM:
-					{
-						FillColumnClay(x, z, Height, a_ChunkDesc.GetBlockTypes());
-						break;
-					}
-					
-					case biMegaTaiga:
-					case biMegaTaigaHills:
-					case biMegaSpruceTaiga:
-					case biMegaSpruceTaigaHills:
-					{
-						FillColumnDirt(x, z, Height, a_ChunkDesc.GetBlockTypes());
-						break;
-					}
-
-					case biDesertHills:
-					case biDesert:
-					case biDesertM:
-					case biBeach:
-					{
-						FillColumnSand(x, z, Height, a_ChunkDesc.GetBlockTypes());
-						break;
-					}
-					case biMushroomIsland:
-					case biMushroomShore:
-					{
-						FillColumnMycelium(x, z, Height, a_ChunkDesc.GetBlockTypes());
-						break;
-					}
-					default:
-					{
-						// TODO
-						ASSERT(!"CompoGenBiomal: Biome not implemented yet!");
-						break;
-					}
-				}
-			}
-			else
-			{
-				switch (a_ChunkDesc.GetBiome(x, z))
-				{
-					case biDesert:
-					case biBeach:
-					{
-						// Fill with water, sand, sandstone and stone
-						FillColumnWaterSand(x, z, Height, a_ChunkDesc.GetBlockTypes());
-						break;
-					}
-					default:
-					{
-						// Fill with water, sand/dirt/clay mix and stone
-						if (m_Noise.CubicNoise2D(0.3f * (cChunkDef::Width * ChunkX + x), 0.3f * (cChunkDef::Width * ChunkZ + z)) < 0)
-						{
-							FillColumnWaterSand(x, z, Height, a_ChunkDesc.GetBlockTypes());
-						}
-						else
-						{
-							FillColumnWaterDirt(x, z, Height, a_ChunkDesc.GetBlockTypes());
-						}
-						break;
-					}
-				}  // switch (biome)
-				a_ChunkDesc.SetHeight(x, z, m_SeaLevel + 1);
-			}  // else (under water)
-			a_ChunkDesc.SetBlockType(x, 0, z, E_BLOCK_BEDROCK);
-		}  // for x
-	}  // for z
-}
-
-
-
-
-
-void cCompoGenBiomal::InitializeCompoGen(cIniFile & a_IniFile)
-{
-	m_SeaLevel = a_IniFile.GetValueSetI("Generator", "BiomalSeaLevel", m_SeaLevel) - 1;
-}
-
-
-
-
-
-void cCompoGenBiomal::FillColumnGrass(int a_RelX, int a_RelZ, int a_Height, cChunkDef::BlockTypes & a_BlockTypes)
-{
-	BLOCKTYPE Pattern[] =
-	{
-		E_BLOCK_GRASS,
-		E_BLOCK_DIRT,
-		E_BLOCK_DIRT,
-		E_BLOCK_DIRT,
-	} ;
-	FillColumnPattern(a_RelX, a_RelZ, a_Height, a_BlockTypes, Pattern, ARRAYCOUNT(Pattern));
-	
-	for (int y = a_Height - ARRAYCOUNT(Pattern); y > 0; y--)
-	{
-		cChunkDef::SetBlock(a_BlockTypes, a_RelX, y, a_RelZ, E_BLOCK_STONE);
-	}
-}
-
-
-
-
-
-void cCompoGenBiomal::FillColumnClay(int a_RelX, int a_RelZ, int a_Height, cChunkDef::BlockTypes & a_BlockTypes)
-{
-	BLOCKTYPE Pattern[] =
-	{
-		E_BLOCK_HARDENED_CLAY,
-		E_BLOCK_HARDENED_CLAY,
-		E_BLOCK_HARDENED_CLAY,
-		E_BLOCK_HARDENED_CLAY,
-	} ;
-	FillColumnPattern(a_RelX, a_RelZ, a_Height, a_BlockTypes, Pattern, ARRAYCOUNT(Pattern));
-	
-	for (int y = a_Height - ARRAYCOUNT(Pattern); y > 0; y--)
-	{
-		cChunkDef::SetBlock(a_BlockTypes, a_RelX, y, a_RelZ, E_BLOCK_STONE);
-	}
-}
-
-
-
-
-
-void cCompoGenBiomal::FillColumnDirt(int a_RelX, int a_RelZ, int a_Height, cChunkDef::BlockTypes & a_BlockTypes)
-{
-	for (int y = 0; y < 4; y++)
-	{
-		if (a_Height - y < 0)
-		{
-			return;
-		}
-		cChunkDef::SetBlock(a_BlockTypes, a_RelX, a_Height - y, a_RelZ, E_BLOCK_DIRT);
-	}
-	for (int y = a_Height - 4; y > 0; y--)
-	{
-		cChunkDef::SetBlock(a_BlockTypes, a_RelX, y, a_RelZ, E_BLOCK_STONE);
-	}
-}
-
-
-
-
-
-void cCompoGenBiomal::FillColumnSand(int a_RelX, int a_RelZ, int a_Height, cChunkDef::BlockTypes & a_BlockTypes)
-{
-	BLOCKTYPE Pattern[] =
-	{
-		E_BLOCK_SAND,
-		E_BLOCK_SAND,
-		E_BLOCK_SAND,
-		E_BLOCK_SANDSTONE,
-	} ;
-	FillColumnPattern(a_RelX, a_RelZ, a_Height, a_BlockTypes, Pattern, ARRAYCOUNT(Pattern));
-	
-	for (int y = a_Height - ARRAYCOUNT(Pattern); y > 0; y--)
-	{
-		cChunkDef::SetBlock(a_BlockTypes, a_RelX, y, a_RelZ, E_BLOCK_STONE);
-	}
-}
-
-
-
-
-
-
-void cCompoGenBiomal::FillColumnMycelium (int a_RelX, int a_RelZ, int a_Height, cChunkDef::BlockTypes & a_BlockTypes)
-{
-	BLOCKTYPE Pattern[] =
-	{
-		E_BLOCK_MYCELIUM,
-		E_BLOCK_DIRT,
-		E_BLOCK_DIRT,
-		E_BLOCK_DIRT,
-	} ;
-	FillColumnPattern(a_RelX, a_RelZ, a_Height, a_BlockTypes, Pattern, ARRAYCOUNT(Pattern));
-	
-	for (int y = a_Height - ARRAYCOUNT(Pattern); y > 0; y--)
-	{
-		cChunkDef::SetBlock(a_BlockTypes, a_RelX, y, a_RelZ, E_BLOCK_STONE);
-	}
-}
-
-
-
-
-
-void cCompoGenBiomal::FillColumnWaterSand(int a_RelX, int a_RelZ, int a_Height, cChunkDef::BlockTypes & a_BlockTypes)
-{
-	FillColumnSand(a_RelX, a_RelZ, a_Height, a_BlockTypes);
-	for (int y = a_Height + 1; y <= m_SeaLevel + 1; y++)
-	{
-		cChunkDef::SetBlock(a_BlockTypes, a_RelX, y, a_RelZ, E_BLOCK_STATIONARY_WATER);
-	}
-}
-
-
-
-
-
-void cCompoGenBiomal::FillColumnWaterDirt(int a_RelX, int a_RelZ, int a_Height, cChunkDef::BlockTypes & a_BlockTypes)
-{
-	// Dirt
-	BLOCKTYPE Pattern[] =
-	{
-		E_BLOCK_DIRT,
-		E_BLOCK_DIRT,
-		E_BLOCK_DIRT,
-		E_BLOCK_DIRT,
-	} ;
-	FillColumnPattern(a_RelX, a_RelZ, a_Height, a_BlockTypes, Pattern, ARRAYCOUNT(Pattern));
-
-	for (int y = a_Height - ARRAYCOUNT(Pattern); y > 0; y--)
-	{
-		cChunkDef::SetBlock(a_BlockTypes, a_RelX, y, a_RelZ, E_BLOCK_STONE);
-	}
-	for (int y = a_Height + 1; y <= m_SeaLevel + 1; y++)
-	{
-		cChunkDef::SetBlock(a_BlockTypes, a_RelX, y, a_RelZ, E_BLOCK_STATIONARY_WATER);
-	}
-}
-
-
-
-
-
-
-void cCompoGenBiomal::FillColumnPattern(int a_RelX, int a_RelZ, int a_Height, cChunkDef::BlockTypes & a_BlockTypes, const BLOCKTYPE * a_Pattern, int a_PatternSize)
-{
-	for (int y = a_Height, idx = 0; (y >= 0) && (idx < a_PatternSize); y--, idx++)
-	{
-		cChunkDef::SetBlock(a_BlockTypes, a_RelX, y, a_RelZ, a_Pattern[idx]);
-	}
-}
-
-
-
-
-
-////////////////////////////////////////////////////////////////////////////////
 // cCompoGenNether:
 
 cCompoGenNether::cCompoGenNether(int a_Seed) :
@@ -540,7 +226,7 @@ cCompoGenNether::cCompoGenNether(int a_Seed) :
 
 
 
-void cCompoGenNether::ComposeTerrain(cChunkDesc & a_ChunkDesc)
+void cCompoGenNether::ComposeTerrain(cChunkDesc & a_ChunkDesc, const cChunkDesc::Shape & a_Shape)
 {
 	HEIGHTTYPE MaxHeight = a_ChunkDesc.GetMaxHeight();
 	
@@ -604,17 +290,7 @@ void cCompoGenNether::ComposeTerrain(cChunkDesc & a_ChunkDesc)
 				BLOCKTYPE Block = E_BLOCK_AIR;
 				if (Val < m_Threshold)  // Don't calculate if the block should be Netherrack or Soulsand when it's already decided that it's air.
 				{
-					NOISE_DATATYPE NoiseX = ((NOISE_DATATYPE)(BaseX + x)) / 8;
-					NOISE_DATATYPE NoiseY = ((NOISE_DATATYPE)(BaseZ + z)) / 8;
-					NOISE_DATATYPE CompBlock = m_Noise1.CubicNoise3D(NoiseX, (float) (y + Segment) / 2, NoiseY);
-					if (CompBlock < -0.5)
-					{
-						Block = E_BLOCK_SOULSAND;
-					}
-					else
-					{
-						Block = E_BLOCK_NETHERRACK;
-					}
+					Block = E_BLOCK_NETHERRACK;
 				}
 				a_ChunkDesc.SetBlockType(x, y + Segment, z, Block);
 			}
@@ -638,7 +314,7 @@ void cCompoGenNether::ComposeTerrain(cChunkDesc & a_ChunkDesc)
 			CeilingDisguise = -CeilingDisguise;
 		}
 
-		int CeilingDisguiseHeight = Height - 2 - (int)CeilingDisguise * 3;
+		int CeilingDisguiseHeight = Height - 2 - FloorC(CeilingDisguise * 3);
 
 		for (int y = Height - 1; y > CeilingDisguiseHeight; y--)
 		{
@@ -696,7 +372,7 @@ cCompoGenCache::~cCompoGenCache()
 
 
 
-void cCompoGenCache::ComposeTerrain(cChunkDesc & a_ChunkDesc)
+void cCompoGenCache::ComposeTerrain(cChunkDesc & a_ChunkDesc, const cChunkDesc::Shape & a_Shape)
 {
 	#ifdef _DEBUG
 	if (((m_NumHits + m_NumMisses) % 1024) == 10)
@@ -731,6 +407,7 @@ void cCompoGenCache::ComposeTerrain(cChunkDesc & a_ChunkDesc)
 		// Use the cached data:
 		memcpy(a_ChunkDesc.GetBlockTypes(),             m_CacheData[Idx].m_BlockTypes, sizeof(a_ChunkDesc.GetBlockTypes()));
 		memcpy(a_ChunkDesc.GetBlockMetasUncompressed(), m_CacheData[Idx].m_BlockMetas, sizeof(a_ChunkDesc.GetBlockMetasUncompressed()));
+		memcpy(a_ChunkDesc.GetHeightMap(),              m_CacheData[Idx].m_HeightMap,  sizeof(a_ChunkDesc.GetHeightMap()));
 		
 		m_NumHits++;
 		m_TotalChain += i;
@@ -739,7 +416,7 @@ void cCompoGenCache::ComposeTerrain(cChunkDesc & a_ChunkDesc)
 	
 	// Not in the cache:
 	m_NumMisses++;
-	m_Underlying->ComposeTerrain(a_ChunkDesc);
+	m_Underlying->ComposeTerrain(a_ChunkDesc, a_Shape);
 	
 	// Insert it as the first item in the MRU order:
 	int Idx = m_CacheOrder[m_CacheSize - 1];
@@ -750,6 +427,7 @@ void cCompoGenCache::ComposeTerrain(cChunkDesc & a_ChunkDesc)
 	m_CacheOrder[0] = Idx;
 	memcpy(m_CacheData[Idx].m_BlockTypes, a_ChunkDesc.GetBlockTypes(),             sizeof(a_ChunkDesc.GetBlockTypes()));
 	memcpy(m_CacheData[Idx].m_BlockMetas, a_ChunkDesc.GetBlockMetasUncompressed(), sizeof(a_ChunkDesc.GetBlockMetasUncompressed()));
+	memcpy(m_CacheData[Idx].m_HeightMap,  a_ChunkDesc.GetHeightMap(),              sizeof(a_ChunkDesc.GetHeightMap()));
 	m_CacheData[Idx].m_ChunkX = ChunkX;
 	m_CacheData[Idx].m_ChunkZ = ChunkZ;
 }
diff --git a/src/Generating/CompoGen.h b/src/Generating/CompoGen.h
index b145b6ba3..3847688cd 100644
--- a/src/Generating/CompoGen.h
+++ b/src/Generating/CompoGen.h
@@ -17,7 +17,7 @@
 #pragma once
 
 #include "ComposableGenerator.h"
-#include "../Noise.h"
+#include "../Noise/Noise.h"
 
 
 
@@ -38,7 +38,7 @@ protected:
 	bool      m_IsBedrocked;
 	
 	// cTerrainCompositionGen overrides:
-	virtual void ComposeTerrain(cChunkDesc & a_ChunkDesc) override;
+	virtual void ComposeTerrain(cChunkDesc & a_ChunkDesc, const cChunkDesc::Shape & a_Shape) override;
 	virtual void InitializeCompoGen(cIniFile & a_IniFile) override;
 } ;
 
@@ -55,7 +55,7 @@ public:
 protected:
 	
 	// cTerrainCompositionGen overrides:
-	virtual void ComposeTerrain(cChunkDesc & a_ChunkDesc) override;
+	virtual void ComposeTerrain(cChunkDesc & a_ChunkDesc, const cChunkDesc::Shape & a_Shape) override;
 } ;
 
 
@@ -81,7 +81,7 @@ protected:
 	BLOCKTYPE m_BlockSea;
 	
 	// cTerrainCompositionGen overrides:
-	virtual void ComposeTerrain(cChunkDesc & a_ChunkDesc) override;
+	virtual void ComposeTerrain(cChunkDesc & a_ChunkDesc, const cChunkDesc::Shape & a_Shape) override;
 	virtual void InitializeCompoGen(cIniFile & a_IniFile) override;
 } ;
 
@@ -89,40 +89,6 @@ protected:
 
 
 
-class cCompoGenBiomal :
-	public cTerrainCompositionGen
-{
-public:
-	cCompoGenBiomal(int a_Seed) :
-		m_Noise(a_Seed + 1000),
-		m_SeaLevel(62)
-	{
-	}
-	
-protected:
-
-	cNoise m_Noise;
-	int    m_SeaLevel;
-	
-	// cTerrainCompositionGen overrides:
-	virtual void ComposeTerrain(cChunkDesc & a_ChunkDesc) override;
-	virtual void InitializeCompoGen(cIniFile & a_IniFile) override;
-	
-	void FillColumnGrass    (int a_RelX, int a_RelZ, int a_Height, cChunkDef::BlockTypes & a_BlockTypes);
-	void FillColumnClay     (int a_RelX, int a_RelZ, int a_Height, cChunkDef::BlockTypes & a_BlockTypes);
-	void FillColumnDirt     (int a_RelX, int a_RelZ, int a_Height, cChunkDef::BlockTypes & a_BlockTypes);
-	void FillColumnSand     (int a_RelX, int a_RelZ, int a_Height, cChunkDef::BlockTypes & a_BlockTypes);
-	void FillColumnMycelium (int a_RelX, int a_RelZ, int a_Height, cChunkDef::BlockTypes & a_BlockTypes);
-	void FillColumnWaterSand(int a_RelX, int a_RelZ, int a_Height, cChunkDef::BlockTypes & a_BlockTypes);
-	void FillColumnWaterDirt(int a_RelX, int a_RelZ, int a_Height, cChunkDef::BlockTypes & a_BlockTypes);
-	
-	void FillColumnPattern  (int a_RelX, int a_RelZ, int a_Height, cChunkDef::BlockTypes & a_BlockTypes, const BLOCKTYPE * a_Pattern, int a_PatternSize);
-} ;
-
-
-
-
-
 class cCompoGenNether :
 	public cTerrainCompositionGen
 {
@@ -136,7 +102,7 @@ protected:
 	int m_Threshold;
 	
 	// cTerrainCompositionGen overrides:
-	virtual void ComposeTerrain(cChunkDesc & a_ChunkDesc) override;
+	virtual void ComposeTerrain(cChunkDesc & a_ChunkDesc, const cChunkDesc::Shape & a_Shape) override;
 	virtual void InitializeCompoGen(cIniFile & a_IniFile) override;
 } ;
 
@@ -153,7 +119,7 @@ public:
 	~cCompoGenCache();
 	
 	// cTerrainCompositionGen override:
-	virtual void ComposeTerrain(cChunkDesc & a_ChunkDesc) override;
+	virtual void ComposeTerrain(cChunkDesc & a_ChunkDesc, const cChunkDesc::Shape & a_Shape) override;
 	virtual void InitializeCompoGen(cIniFile & a_IniFile) override;
 	
 protected:
@@ -166,6 +132,7 @@ protected:
 		int m_ChunkZ;
 		cChunkDef::BlockTypes        m_BlockTypes;
 		cChunkDesc::BlockNibbleBytes m_BlockMetas;  // The metas are uncompressed, 1 meta per byte
+		cChunkDef::HeightMap         m_HeightMap;
 	} ;
 	
 	// To avoid moving large amounts of data for the MRU behavior, we MRU-ize indices to an array of the actual data
diff --git a/src/Generating/CompoGenBiomal.cpp b/src/Generating/CompoGenBiomal.cpp
new file mode 100644
index 000000000..030c2baa5
--- /dev/null
+++ b/src/Generating/CompoGenBiomal.cpp
@@ -0,0 +1,586 @@
+
+// CompoGenBiomal.cpp
+
+// Implements the cCompoGenBiomal class representing the biome-aware composition generator
+
+#include "Globals.h"
+#include "ComposableGenerator.h"
+#include "../IniFile.h"
+#include "../Noise/Noise.h"
+#include "../LinearUpscale.h"
+
+
+
+
+
+////////////////////////////////////////////////////////////////////////////////
+// cPattern:
+
+/** This class is used to store a column pattern initialized at runtime,
+so that the program doesn't need to explicitly set 256 values for each pattern
+Each pattern has 256 blocks so that there's no need to check pattern bounds when assigning the
+pattern - there will always be enough pattern left, even for the whole-chunk-height columns. */
+class cPattern
+{
+public:
+	struct BlockInfo
+	{
+		BLOCKTYPE  m_BlockType;
+		NIBBLETYPE m_BlockMeta;
+	};
+
+	cPattern(BlockInfo * a_TopBlocks, size_t a_Count)
+	{
+		// Copy the pattern into the top:
+		for (size_t i = 0; i < a_Count; i++)
+		{
+			m_Pattern[i] = a_TopBlocks[i];
+		}
+		
+		// Fill the rest with stone:
+		static BlockInfo Stone = {E_BLOCK_STONE, 0};
+		for (int i = static_cast<int>(a_Count); i < cChunkDef::Height; i++)
+		{
+			m_Pattern[i] = Stone;
+		}
+	}
+	
+	const BlockInfo * Get(void) const { return m_Pattern; }
+	
+protected:
+	BlockInfo m_Pattern[cChunkDef::Height];
+} ;
+
+
+
+
+
+////////////////////////////////////////////////////////////////////////////////
+// The arrays to use for the top block pattern definitions:
+
+static cPattern::BlockInfo tbGrass[] =
+{
+	{E_BLOCK_GRASS, 0},
+	{E_BLOCK_DIRT,  E_META_DIRT_NORMAL},
+	{E_BLOCK_DIRT,  E_META_DIRT_NORMAL},
+	{E_BLOCK_DIRT,  E_META_DIRT_NORMAL},
+} ;
+
+static cPattern::BlockInfo tbSand[] =
+{
+	{ E_BLOCK_SAND, 0},
+	{ E_BLOCK_SAND, 0},
+	{ E_BLOCK_SAND, 0},
+	{ E_BLOCK_SANDSTONE, 0},
+} ;
+
+static cPattern::BlockInfo tbDirt[] =
+{
+	{E_BLOCK_DIRT, E_META_DIRT_NORMAL},
+	{E_BLOCK_DIRT, E_META_DIRT_NORMAL},
+	{E_BLOCK_DIRT, E_META_DIRT_NORMAL},
+	{E_BLOCK_DIRT, E_META_DIRT_NORMAL},
+} ;
+
+static cPattern::BlockInfo tbPodzol[] =
+{
+	{E_BLOCK_DIRT, E_META_DIRT_PODZOL},
+	{E_BLOCK_DIRT, E_META_DIRT_NORMAL},
+	{E_BLOCK_DIRT, E_META_DIRT_NORMAL},
+	{E_BLOCK_DIRT, E_META_DIRT_NORMAL},
+} ;
+
+static cPattern::BlockInfo tbGrassLess[] =
+{
+	{E_BLOCK_DIRT, E_META_DIRT_GRASSLESS},
+	{E_BLOCK_DIRT, E_META_DIRT_NORMAL},
+	{E_BLOCK_DIRT, E_META_DIRT_NORMAL},
+	{E_BLOCK_DIRT, E_META_DIRT_NORMAL},
+} ;
+
+static cPattern::BlockInfo tbMycelium[] =
+{
+	{E_BLOCK_MYCELIUM, 0},
+	{E_BLOCK_DIRT,     0},
+	{E_BLOCK_DIRT,     0},
+	{E_BLOCK_DIRT,     0},
+} ;
+
+static cPattern::BlockInfo tbGravel[] =
+{
+	{E_BLOCK_GRAVEL, 0},
+	{E_BLOCK_GRAVEL, 0},
+	{E_BLOCK_GRAVEL, 0},
+	{E_BLOCK_STONE,  0},
+} ;
+
+static cPattern::BlockInfo tbStone[] =
+{
+	{E_BLOCK_STONE,   0},
+	{E_BLOCK_STONE,   0},
+	{E_BLOCK_STONE,   0},
+	{E_BLOCK_STONE,   0},
+} ;
+
+
+
+////////////////////////////////////////////////////////////////////////////////
+// Ocean floor pattern top-block definitions:
+
+static cPattern::BlockInfo tbOFSand[] =
+{
+	{E_BLOCK_SAND, 0},
+	{E_BLOCK_SAND, 0},
+	{E_BLOCK_SAND, 0},
+	{E_BLOCK_SANDSTONE, 0}
+} ;
+
+static cPattern::BlockInfo tbOFClay[] =
+{
+	{ E_BLOCK_CLAY, 0},
+	{ E_BLOCK_CLAY, 0},
+	{ E_BLOCK_SAND, 0},
+	{ E_BLOCK_SAND, 0},
+} ;
+
+static cPattern::BlockInfo tbOFOrangeClay[] =
+{
+	{ E_BLOCK_STAINED_CLAY, E_META_STAINED_GLASS_ORANGE},
+	{ E_BLOCK_STAINED_CLAY, E_META_STAINED_GLASS_ORANGE},
+	{ E_BLOCK_STAINED_CLAY, E_META_STAINED_GLASS_ORANGE},
+} ;
+
+
+
+
+
+
+////////////////////////////////////////////////////////////////////////////////
+// Individual patterns to use:
+
+static cPattern patGrass    (tbGrass,     ARRAYCOUNT(tbGrass));
+static cPattern patSand     (tbSand,      ARRAYCOUNT(tbSand));
+static cPattern patDirt     (tbDirt,      ARRAYCOUNT(tbDirt));
+static cPattern patPodzol   (tbPodzol,    ARRAYCOUNT(tbPodzol));
+static cPattern patGrassLess(tbGrassLess, ARRAYCOUNT(tbGrassLess));
+static cPattern patMycelium (tbMycelium,  ARRAYCOUNT(tbMycelium));
+static cPattern patGravel   (tbGravel,    ARRAYCOUNT(tbGravel));
+static cPattern patStone    (tbStone,     ARRAYCOUNT(tbStone));
+
+static cPattern patOFSand      (tbOFSand,       ARRAYCOUNT(tbOFSand));
+static cPattern patOFClay      (tbOFClay,       ARRAYCOUNT(tbOFClay));
+static cPattern patOFOrangeClay(tbOFOrangeClay, ARRAYCOUNT(tbOFOrangeClay));
+
+
+
+
+
+////////////////////////////////////////////////////////////////////////////////
+// cCompoGenBiomal:
+
+class cCompoGenBiomal :
+	public cTerrainCompositionGen
+{
+public:
+	cCompoGenBiomal(int a_Seed) :
+		m_SeaLevel(62),
+		m_OceanFloorSelect(a_Seed + 1),
+		m_MesaFloor(a_Seed + 2)
+	{
+		initMesaPattern(a_Seed);
+	}
+	
+protected:
+	/** The block height at which water is generated instead of air. */
+	int m_SeaLevel;
+
+	/** The pattern used for mesa biomes. Initialized by seed on generator creation. */
+	cPattern::BlockInfo m_MesaPattern[2 * cChunkDef::Height];
+	
+	/** Noise used for selecting between dirt and sand on the ocean floor. */
+	cNoise m_OceanFloorSelect;
+
+	/** Noise used for the floor of the clay blocks in mesa biomes. */
+	cNoise m_MesaFloor;
+
+
+	// cTerrainCompositionGen overrides:
+	virtual void ComposeTerrain(cChunkDesc & a_ChunkDesc, const cChunkDesc::Shape & a_Shape) override
+	{
+		a_ChunkDesc.FillBlocks(E_BLOCK_AIR, 0);
+		for (int z = 0; z < cChunkDef::Width; z++)
+		{
+			for (int x = 0; x < cChunkDef::Width; x++)
+			{
+				ComposeColumn(a_ChunkDesc, x, z, &(a_Shape[x * 256 + z * 16 * 256]));
+			}  // for x
+		}  // for z
+	}
+
+
+
+	virtual void InitializeCompoGen(cIniFile & a_IniFile) override
+	{
+		m_SeaLevel = a_IniFile.GetValueSetI("Generator", "SeaLevel", m_SeaLevel);
+	}
+	
+
+
+	/** Initializes the m_MesaPattern with a pattern based on the generator's seed. */
+	void initMesaPattern(int a_Seed)
+	{
+		// In a loop, choose whether to use one, two or three layers of stained clay, then choose a color and width for each layer
+		// Separate each group with another layer of hardened clay
+		cNoise patternNoise((unsigned)a_Seed);
+		static NIBBLETYPE allowedColors[] =
+		{
+			E_META_STAINED_CLAY_YELLOW,
+			E_META_STAINED_CLAY_YELLOW,
+			E_META_STAINED_CLAY_RED,
+			E_META_STAINED_CLAY_RED,
+			E_META_STAINED_CLAY_WHITE,
+			E_META_STAINED_CLAY_BROWN,
+			E_META_STAINED_CLAY_BROWN,
+			E_META_STAINED_CLAY_BROWN,
+			E_META_STAINED_CLAY_ORANGE,
+			E_META_STAINED_CLAY_ORANGE,
+			E_META_STAINED_CLAY_ORANGE,
+			E_META_STAINED_CLAY_ORANGE,
+			E_META_STAINED_CLAY_ORANGE,
+			E_META_STAINED_CLAY_ORANGE,
+			E_META_STAINED_CLAY_LIGHTGRAY,
+		} ;
+		static int layerSizes[] =  // Adjust the chance so that thinner layers occur more commonly
+		{
+			1, 1, 1, 1, 1, 1,
+			2, 2, 2, 2,
+			3, 3,
+		} ;
+		int idx = ARRAYCOUNT(m_MesaPattern) - 1;
+		while (idx >= 0)
+		{
+			// A layer group of 1 - 2 color stained clay:
+			int rnd = patternNoise.IntNoise1DInt(idx) / 7;
+			int numLayers = (rnd % 2) + 1;
+			rnd /= 2;
+			for (int lay = 0; lay < numLayers; lay++)
+			{
+				int numBlocks = layerSizes[(rnd % ARRAYCOUNT(layerSizes))];
+				NIBBLETYPE Color = allowedColors[(rnd / 4) % ARRAYCOUNT(allowedColors)];
+				if (
+					((numBlocks == 3) && (numLayers == 2)) ||  // In two-layer mode disallow the 3-high layers:
+					(Color == E_META_STAINED_CLAY_WHITE))      // White stained clay can ever be only 1 block high
+				{
+					numBlocks = 1;
+				}
+				numBlocks = std::min(idx + 1, numBlocks);  // Limit by idx so that we don't have to check inside the loop
+				rnd /= 32;
+				for (int block = 0; block < numBlocks; block++, idx--)
+				{
+					m_MesaPattern[idx].m_BlockMeta = Color;
+					m_MesaPattern[idx].m_BlockType = E_BLOCK_STAINED_CLAY;
+				}  // for block
+			}  // for lay
+
+			// A layer of hardened clay in between the layer group:
+			int numBlocks = (rnd % 4) + 1;  // All heights the same probability
+			if ((numLayers == 2) && (numBlocks < 4))
+			{
+				// For two layers of stained clay, add an extra block of hardened clay:
+				numBlocks++;
+			}
+			numBlocks = std::min(idx + 1, numBlocks);  // Limit by idx so that we don't have to check inside the loop
+			for (int block = 0; block < numBlocks; block++, idx--)
+			{
+				m_MesaPattern[idx].m_BlockMeta = 0;
+				m_MesaPattern[idx].m_BlockType = E_BLOCK_HARDENED_CLAY;
+			}  // for block
+		}  // while (idx >= 0)
+	}
+
+
+
+	/** Composes a single column in a_ChunkDesc. Chooses what to do based on the biome in that column. */
+	void ComposeColumn(cChunkDesc & a_ChunkDesc, int a_RelX, int a_RelZ, const Byte * a_ShapeColumn)
+	{
+		// Frequencies for the podzol floor selecting noise:
+		const NOISE_DATATYPE FrequencyX = 8;
+		const NOISE_DATATYPE FrequencyZ = 8;
+	
+		EMCSBiome Biome = a_ChunkDesc.GetBiome(a_RelX, a_RelZ);
+		switch (Biome)
+		{
+			case biOcean:
+			case biPlains:
+			case biForest:
+			case biTaiga:
+			case biSwampland:
+			case biRiver:
+			case biFrozenOcean:
+			case biFrozenRiver:
+			case biIcePlains:
+			case biIceMountains:
+			case biForestHills:
+			case biTaigaHills:
+			case biExtremeHillsEdge:
+			case biExtremeHillsPlus:
+			case biExtremeHills:
+			case biJungle:
+			case biJungleHills:
+			case biJungleEdge:
+			case biDeepOcean:
+			case biStoneBeach:
+			case biColdBeach:
+			case biBirchForest:
+			case biBirchForestHills:
+			case biRoofedForest:
+			case biColdTaiga:
+			case biColdTaigaHills:
+			case biSavanna:
+			case biSavannaPlateau:
+			case biSunflowerPlains:
+			case biFlowerForest:
+			case biTaigaM:
+			case biSwamplandM:
+			case biIcePlainsSpikes:
+			case biJungleM:
+			case biJungleEdgeM:
+			case biBirchForestM:
+			case biBirchForestHillsM:
+			case biRoofedForestM:
+			case biColdTaigaM:
+			case biSavannaM:
+			case biSavannaPlateauM:
+			{
+				FillColumnPattern(a_ChunkDesc, a_RelX, a_RelZ, patGrass.Get(), a_ShapeColumn);
+				return;
+			}
+
+			case biMegaTaiga:
+			case biMegaTaigaHills:
+			case biMegaSpruceTaiga:
+			case biMegaSpruceTaigaHills:
+			{
+				// Select the pattern to use - podzol, grass or grassless dirt:
+				NOISE_DATATYPE NoiseX = ((NOISE_DATATYPE)(a_ChunkDesc.GetChunkX() * cChunkDef::Width + a_RelX)) / FrequencyX;
+				NOISE_DATATYPE NoiseY = ((NOISE_DATATYPE)(a_ChunkDesc.GetChunkZ() * cChunkDef::Width + a_RelZ)) / FrequencyZ;
+				NOISE_DATATYPE Val = m_OceanFloorSelect.CubicNoise2D(NoiseX, NoiseY);
+				const cPattern::BlockInfo * Pattern = (Val < -0.9) ? patGrassLess.Get() : ((Val > 0) ? patPodzol.Get() : patGrass.Get());
+				FillColumnPattern(a_ChunkDesc, a_RelX, a_RelZ, Pattern, a_ShapeColumn);
+				return;
+			}
+
+			case biDesertHills:
+			case biDesert:
+			case biDesertM:
+			case biBeach:
+			{
+				FillColumnPattern(a_ChunkDesc, a_RelX, a_RelZ, patSand.Get(), a_ShapeColumn);
+				return;
+			}
+		
+			case biMushroomIsland:
+			case biMushroomShore:
+			{
+				FillColumnPattern(a_ChunkDesc, a_RelX, a_RelZ, patMycelium.Get(), a_ShapeColumn);
+				return;
+			}
+
+			case biMesa:
+			case biMesaPlateauF:
+			case biMesaPlateau:
+			case biMesaBryce:
+			case biMesaPlateauFM:
+			case biMesaPlateauM:
+			{
+				// Mesa biomes need special handling, because they don't follow the usual "4 blocks from top pattern",
+				// instead, they provide a "from bottom" pattern with varying base height,
+				// usually 4 blocks below the ocean level
+				FillColumnMesa(a_ChunkDesc, a_RelX, a_RelZ, a_ShapeColumn);
+				return;
+			}
+
+			case biExtremeHillsPlusM:
+			case biExtremeHillsM:
+			{
+				// Select the pattern to use - gravel, stone or grass:
+				NOISE_DATATYPE NoiseX = ((NOISE_DATATYPE)(a_ChunkDesc.GetChunkX() * cChunkDef::Width + a_RelX)) / FrequencyX;
+				NOISE_DATATYPE NoiseY = ((NOISE_DATATYPE)(a_ChunkDesc.GetChunkZ() * cChunkDef::Width + a_RelZ)) / FrequencyZ;
+				NOISE_DATATYPE Val = m_OceanFloorSelect.CubicNoise2D(NoiseX, NoiseY);
+				const cPattern::BlockInfo * Pattern = (Val < 0.0) ? patStone.Get() : patGrass.Get();
+				FillColumnPattern(a_ChunkDesc, a_RelX, a_RelZ, Pattern, a_ShapeColumn);
+				return;
+			}
+			default:
+			{
+				ASSERT(!"Unhandled biome");
+				return;
+			}
+		}  // switch (Biome)
+	}
+	
+
+
+	/** Fills the specified column with the specified pattern; restarts the pattern when air is reached,
+	switches to ocean floor pattern if ocean is reached. Always adds bedrock at the very bottom. */
+	void FillColumnPattern(cChunkDesc & a_ChunkDesc, int a_RelX, int a_RelZ, const cPattern::BlockInfo * a_Pattern, const Byte * a_ShapeColumn)
+	{
+		bool HasHadWater = false;
+		int PatternIdx = 0;
+		int top = std::max(m_SeaLevel, a_ChunkDesc.GetHeight(a_RelX, a_RelZ));
+		for (int y = top; y > 0; y--)
+		{
+			if (a_ShapeColumn[y] > 0)
+			{
+				// "ground" part, use the pattern:
+				a_ChunkDesc.SetBlockTypeMeta(a_RelX, y, a_RelZ, a_Pattern[PatternIdx].m_BlockType, a_Pattern[PatternIdx].m_BlockMeta);
+				PatternIdx++;
+				continue;
+			}
+		
+			// "air" or "water" part:
+			// Reset the pattern index to zero, so that the pattern is repeated from the top again:
+			PatternIdx = 0;
+		
+			if (y >= m_SeaLevel)
+			{
+				// "air" part, do nothing
+				continue;
+			}
+		
+			a_ChunkDesc.SetBlockType(a_RelX, y, a_RelZ, E_BLOCK_STATIONARY_WATER);
+			if (HasHadWater)
+			{
+				continue;
+			}
+		
+			// Select the ocean-floor pattern to use:
+			if (a_ChunkDesc.GetBiome(a_RelX, a_RelZ) == biDeepOcean)
+			{
+				a_Pattern = patGravel.Get();
+			}
+			else
+			{
+				a_Pattern = ChooseOceanFloorPattern(a_ChunkDesc.GetChunkX(), a_ChunkDesc.GetChunkZ(), a_RelX, a_RelZ);
+			}
+			HasHadWater = true;
+		}  // for y
+		a_ChunkDesc.SetBlockType(a_RelX, 0, a_RelZ, E_BLOCK_BEDROCK);
+	}
+
+
+
+	/** Fills the specified column with mesa pattern, based on the column height */
+	void FillColumnMesa(cChunkDesc & a_ChunkDesc, int a_RelX, int a_RelZ, const Byte * a_ShapeColumn)
+	{
+		// Frequencies for the clay floor noise:
+		const NOISE_DATATYPE FrequencyX = 50;
+		const NOISE_DATATYPE FrequencyZ = 50;
+
+		int Top = a_ChunkDesc.GetHeight(a_RelX, a_RelZ);
+		if (Top < m_SeaLevel)
+		{
+			// The terrain is below sealevel, handle as regular ocean with red sand floor:
+			FillColumnPattern(a_ChunkDesc, a_RelX, a_RelZ, patOFOrangeClay.Get(), a_ShapeColumn);
+			return;
+		}
+
+		NOISE_DATATYPE NoiseX = ((NOISE_DATATYPE)(a_ChunkDesc.GetChunkX() * cChunkDef::Width + a_RelX)) / FrequencyX;
+		NOISE_DATATYPE NoiseY = ((NOISE_DATATYPE)(a_ChunkDesc.GetChunkZ() * cChunkDef::Width + a_RelZ)) / FrequencyZ;
+		int ClayFloor = m_SeaLevel - 6 + (int)(4.f * m_MesaFloor.CubicNoise2D(NoiseX, NoiseY));
+		if (ClayFloor >= Top)
+		{
+			ClayFloor = Top - 1;
+		}
+	
+		if (Top - m_SeaLevel < 5)
+		{
+			// Simple case: top is red sand, then hardened clay down to ClayFloor, then stone:
+			a_ChunkDesc.SetBlockTypeMeta(a_RelX, Top, a_RelZ, E_BLOCK_SAND, E_META_SAND_RED);
+			for (int y = Top - 1; y >= ClayFloor; y--)
+			{
+				a_ChunkDesc.SetBlockType(a_RelX, y, a_RelZ, E_BLOCK_HARDENED_CLAY);
+			}
+			for (int y = ClayFloor - 1; y > 0; y--)
+			{
+				a_ChunkDesc.SetBlockType(a_RelX, y, a_RelZ, E_BLOCK_STONE);
+			}
+			a_ChunkDesc.SetBlockType(a_RelX, 0, a_RelZ, E_BLOCK_BEDROCK);
+			return;
+		}
+	
+		// Difficult case: use the mesa pattern and watch for overhangs:
+		int PatternIdx = cChunkDef::Height - (Top - ClayFloor);  // We want the block at index ClayFloor to be pattern's 256th block (first stone)
+		const cPattern::BlockInfo * Pattern = m_MesaPattern;
+		bool HasHadWater = false;
+		for (int y = Top; y > 0; y--)
+		{
+			if (a_ShapeColumn[y] > 0)
+			{
+				// "ground" part, use the pattern:
+				a_ChunkDesc.SetBlockTypeMeta(a_RelX, y, a_RelZ, Pattern[PatternIdx].m_BlockType, Pattern[PatternIdx].m_BlockMeta);
+				PatternIdx++;
+				continue;
+			}
+
+			if (y >= m_SeaLevel)
+			{
+				// "air" part, do nothing
+				continue;
+			}
+		
+			// "water" part, fill with water and choose new pattern for ocean floor, if not chosen already:
+			PatternIdx = 0;
+			a_ChunkDesc.SetBlockType(a_RelX, y, a_RelZ, E_BLOCK_STATIONARY_WATER);
+			if (HasHadWater)
+			{
+				continue;
+			}
+		
+			// Select the ocean-floor pattern to use:
+			Pattern = ChooseOceanFloorPattern(a_ChunkDesc.GetChunkX(), a_ChunkDesc.GetChunkZ(), a_RelX, a_RelZ);
+			HasHadWater = true;
+		}  // for y
+		a_ChunkDesc.SetBlockType(a_RelX, 0, a_RelZ, E_BLOCK_BEDROCK);
+	}
+
+
+	
+	/** Returns the pattern to use for an ocean floor in the specified column.
+	The returned pattern is guaranteed to be 256 blocks long. */
+	const cPattern::BlockInfo * ChooseOceanFloorPattern(int a_ChunkX, int a_ChunkZ, int a_RelX, int a_RelZ)
+	{
+		// Frequencies for the ocean floor selecting noise:
+		const NOISE_DATATYPE FrequencyX = 3;
+		const NOISE_DATATYPE FrequencyZ = 3;
+
+		// Select the ocean-floor pattern to use:
+		NOISE_DATATYPE NoiseX = ((NOISE_DATATYPE)(a_ChunkX * cChunkDef::Width + a_RelX)) / FrequencyX;
+		NOISE_DATATYPE NoiseY = ((NOISE_DATATYPE)(a_ChunkZ * cChunkDef::Width + a_RelZ)) / FrequencyZ;
+		NOISE_DATATYPE Val = m_OceanFloorSelect.CubicNoise2D(NoiseX, NoiseY);
+		if (Val < -0.95)
+		{
+			return patOFClay.Get();
+		}
+		else if (Val < 0)
+		{
+			return patOFSand.Get();
+		}
+		else
+		{
+			return patDirt.Get();
+		}
+	}
+} ;
+
+
+
+
+
+cTerrainCompositionGenPtr CreateCompoGenBiomal(int a_Seed)
+{
+	return std::make_shared<cCompoGenBiomal>(a_Seed);
+}
+
+
+
diff --git a/src/Generating/CompoGenBiomal.h b/src/Generating/CompoGenBiomal.h
new file mode 100644
index 000000000..a3a65d3dc
--- /dev/null
+++ b/src/Generating/CompoGenBiomal.h
@@ -0,0 +1,21 @@
+
+// CompoGenBiomal.h
+
+
+
+
+
+#pragma once
+
+#include "ComposableGenerator.h"
+
+
+
+
+
+/** Returns a new instance of the Biomal composition generator. */
+cTerrainCompositionGenPtr CreateCompoGenBiomal(int a_Seed);
+
+
+
+
diff --git a/src/Generating/ComposableGenerator.cpp b/src/Generating/ComposableGenerator.cpp
index 169821050..bda45ad92 100644
--- a/src/Generating/ComposableGenerator.cpp
+++ b/src/Generating/ComposableGenerator.cpp
@@ -17,6 +17,10 @@
 #include "StructGen.h"
 #include "FinishGen.h"
 
+#include "CompoGenBiomal.h"
+
+#include "CompositedHeiGen.h"
+
 #include "Caves.h"
 #include "DistortedHeightmap.h"
 #include "DungeonRoomsFinisher.h"
@@ -39,7 +43,7 @@
 ////////////////////////////////////////////////////////////////////////////////
 // cTerrainCompositionGen:
 
-cTerrainCompositionGenPtr cTerrainCompositionGen::CreateCompositionGen(cIniFile & a_IniFile, cBiomeGenPtr a_BiomeGen, cTerrainHeightGen & a_HeightGen, int a_Seed)
+cTerrainCompositionGenPtr cTerrainCompositionGen::CreateCompositionGen(cIniFile & a_IniFile, cBiomeGenPtr a_BiomeGen, cTerrainShapeGenPtr a_ShapeGen, int a_Seed)
 {
 	AString CompoGenName = a_IniFile.GetValueSet("Generator", "CompositionGen", "");
 	if (CompoGenName.empty())
@@ -48,59 +52,52 @@ cTerrainCompositionGenPtr cTerrainCompositionGen::CreateCompositionGen(cIniFile
 		CompoGenName = "Biomal";
 	}
 	
-	cTerrainCompositionGen * res = nullptr;
-	if (NoCaseCompare(CompoGenName, "sameblock") == 0)
+	// Compositor list is alpha-sorted
+	cTerrainCompositionGenPtr res;
+	if (NoCaseCompare(CompoGenName, "Biomal") == 0)
+	{
+		res = CreateCompoGenBiomal(a_Seed);
+	}
+	else if (NoCaseCompare(CompoGenName, "BiomalNoise3D") == 0)
 	{
-		res = new cCompoGenSameBlock;
+		// The composition that used to be provided with BiomalNoise3D is now provided by the Biomal compositor:
+		res = CreateCompoGenBiomal(a_Seed);
 	}
-	else if (NoCaseCompare(CompoGenName, "debugbiomes") == 0)
+	else if (NoCaseCompare(CompoGenName, "Classic") == 0)
 	{
-		res = new cCompoGenDebugBiomes;
+		res = std::make_shared<cCompoGenClassic>();
 	}
-	else if (NoCaseCompare(CompoGenName, "classic") == 0)
+	else if (NoCaseCompare(CompoGenName, "DebugBiomes") == 0)
 	{
-		res = new cCompoGenClassic;
+		res = std::make_shared<cCompoGenDebugBiomes>();
 	}
 	else if (NoCaseCompare(CompoGenName, "DistortedHeightmap") == 0)
 	{
-		res = new cDistortedHeightmap(a_Seed, a_BiomeGen);
+		// The composition that used to be provided with DistortedHeightmap is now provided by the Biomal compositor:
+		res = CreateCompoGenBiomal(a_Seed);
 	}
-	else if (NoCaseCompare(CompoGenName, "end") == 0)
+	else if (NoCaseCompare(CompoGenName, "End") == 0)
 	{
-		res = new cEndGen(a_Seed);
+		res = std::make_shared<cEndGen>(a_Seed);
 	}
-	else if (NoCaseCompare(CompoGenName, "nether") == 0)
+	else if (NoCaseCompare(CompoGenName, "Nether") == 0)
 	{
-		res = new cCompoGenNether(a_Seed);
+		res = std::make_shared<cCompoGenNether>(a_Seed);
 	}
 	else if (NoCaseCompare(CompoGenName, "Noise3D") == 0)
 	{
-		res = new cNoise3DComposable(a_Seed);
+		// The composition that used to be provided with Noise3D is now provided by the Biomal compositor:
+		res = CreateCompoGenBiomal(a_Seed);
 	}
-	else if (NoCaseCompare(CompoGenName, "biomal") == 0)
+	else if (NoCaseCompare(CompoGenName, "SameBlock") == 0)
 	{
-		res = new cCompoGenBiomal(a_Seed);
-
-		/*
-		// Performance-testing:
-		LOGINFO("Measuring performance of cCompoGenBiomal...");
-		clock_t BeginTick = clock();
-		for (int x = 0; x < 500; x++)
-		{
-			cChunkDesc Desc(200 + x * 8, 200 + x * 8);
-			a_BiomeGen->GenBiomes(Desc.GetChunkX(), Desc.GetChunkZ(), Desc.GetBiomeMap());
-			a_HeightGen->GenHeightMap(Desc.GetChunkX(), Desc.GetChunkZ(), Desc.GetHeightMap());
-			res->ComposeTerrain(Desc);
-		}
-		clock_t Duration = clock() - BeginTick;
-		LOGINFO("CompositionGen for 500 chunks took %d ticks (%.02f sec)", Duration, (double)Duration / CLOCKS_PER_SEC);
-		//*/
+		res = std::make_shared<cCompoGenSameBlock>();
 	}
 	else
 	{
 		LOGWARN("Unknown CompositionGen \"%s\", using \"Biomal\" instead.", CompoGenName.c_str());
 		a_IniFile.SetValue("Generator", "CompositionGen", "Biomal");
-		return CreateCompositionGen(a_IniFile, a_BiomeGen, a_HeightGen, a_Seed);
+		return CreateCompositionGen(a_IniFile, a_BiomeGen, a_ShapeGen, a_Seed);
 	}
 	ASSERT(res != nullptr);
 	
@@ -120,7 +117,7 @@ cTerrainCompositionGenPtr cTerrainCompositionGen::CreateCompositionGen(cIniFile
 cComposableGenerator::cComposableGenerator(cChunkGenerator & a_ChunkGenerator) :
 	super(a_ChunkGenerator),
 	m_BiomeGen(),
-	m_HeightGen(),
+	m_ShapeGen(),
 	m_CompositionGen()
 {
 }
@@ -134,7 +131,7 @@ void cComposableGenerator::Initialize(cIniFile & a_IniFile)
 	super::Initialize(a_IniFile);
 	
 	InitBiomeGen(a_IniFile);
-	InitHeightGen(a_IniFile);
+	InitShapeGen(a_IniFile);
 	InitCompositionGen(a_IniFile);
 	InitFinishGens(a_IniFile);
 }
@@ -162,16 +159,22 @@ void cComposableGenerator::DoGenerate(int a_ChunkX, int a_ChunkZ, cChunkDesc & a
 		m_BiomeGen->GenBiomes(a_ChunkX, a_ChunkZ, a_ChunkDesc.GetBiomeMap());
 	}
 	
+	cChunkDesc::Shape shape;
 	if (a_ChunkDesc.IsUsingDefaultHeight())
 	{
-		m_HeightGen->GenHeightMap(a_ChunkX, a_ChunkZ, a_ChunkDesc.GetHeightMap());
+		m_ShapeGen->GenShape(a_ChunkX, a_ChunkZ, shape);
+		a_ChunkDesc.SetHeightFromShape(shape);
+	}
+	else
+	{
+		// Convert the heightmap in a_ChunkDesc into shape:
+		a_ChunkDesc.GetShapeFromHeight(shape);
 	}
 	
 	bool ShouldUpdateHeightmap = false;
 	if (a_ChunkDesc.IsUsingDefaultComposition())
 	{
-		m_CompositionGen->ComposeTerrain(a_ChunkDesc);
-		ShouldUpdateHeightmap = true;
+		m_CompositionGen->ComposeTerrain(a_ChunkDesc, shape);
 	}
 
 	if (a_ChunkDesc.IsUsingDefaultFinish())
@@ -230,13 +233,15 @@ void cComposableGenerator::InitBiomeGen(cIniFile & a_IniFile)
 
 
 
-void cComposableGenerator::InitHeightGen(cIniFile & a_IniFile)
+void cComposableGenerator::InitShapeGen(cIniFile & a_IniFile)
 {
 	bool CacheOffByDefault = false;
-	m_HeightGen = cTerrainHeightGen::CreateHeightGen(a_IniFile, m_BiomeGen, m_ChunkGenerator.GetSeed(), CacheOffByDefault);
+	m_ShapeGen = cTerrainShapeGen::CreateShapeGen(a_IniFile, m_BiomeGen, m_ChunkGenerator.GetSeed(), CacheOffByDefault);
 	
+	/*
+	// TODO
 	// Add a cache, if requested:
-	int CacheSize = a_IniFile.GetValueSetI("Generator", "HeightGenCacheSize", CacheOffByDefault ? 0 : 64);
+	int CacheSize = a_IniFile.GetValueSetI("Generator", "ShapeGenCacheSize", CacheOffByDefault ? 0 : 64);
 	if (CacheSize > 0)
 	{
 		if (CacheSize < 4)
@@ -249,6 +254,7 @@ void cComposableGenerator::InitHeightGen(cIniFile & a_IniFile)
 		LOGD("Using a cache for Heightgen of size %d.", CacheSize);
 		m_HeightGen = cTerrainHeightGenPtr(new cHeiGenCache(m_HeightGen, CacheSize));
 	}
+	*/
 }
 
 
@@ -257,13 +263,19 @@ void cComposableGenerator::InitHeightGen(cIniFile & a_IniFile)
 
 void cComposableGenerator::InitCompositionGen(cIniFile & a_IniFile)
 {
-	m_CompositionGen = cTerrainCompositionGen::CreateCompositionGen(a_IniFile, m_BiomeGen, *m_HeightGen, m_ChunkGenerator.GetSeed());
+	m_CompositionGen = cTerrainCompositionGen::CreateCompositionGen(a_IniFile, m_BiomeGen, m_ShapeGen, m_ChunkGenerator.GetSeed());
 	
+	// Add a cache over the composition generator:
+	// Even a cache of size 1 is useful due to the CompositedHeiGen cache after us doing re-composition on its misses
 	int CompoGenCacheSize = a_IniFile.GetValueSetI("Generator", "CompositionGenCacheSize", 64);
-	if (CompoGenCacheSize > 1)
+	if (CompoGenCacheSize > 0)
 	{
-		m_CompositionGen = cTerrainCompositionGenPtr(new cCompoGenCache(m_CompositionGen, 32));
+		m_CompositionGen = std::make_shared<cCompoGenCache>(m_CompositionGen, CompoGenCacheSize);
 	}
+
+	// Create a cache of the composited heightmaps, so that finishers may use it:
+	m_CompositedHeightCache = std::make_shared<cHeiGenMultiCache>(std::make_shared<cCompositedHeiGen>(m_ShapeGen, m_CompositionGen), 16, 24);
+	// 24 subcaches of depth 16 each = 96 KiB of RAM. Acceptable, for the amount of work this saves.
 }
 
 
@@ -282,7 +294,11 @@ void cComposableGenerator::InitFinishGens(cIniFile & a_IniFile)
 	for (AStringVector::const_iterator itr = Str.begin(); itr != Str.end(); ++itr)
 	{
 		// Finishers, alpha-sorted:
-		if (NoCaseCompare(*itr, "BottomLava") == 0)
+		if (NoCaseCompare(*itr, "Animals") == 0)
+		{
+			m_FinishGens.push_back(cFinishGenPtr(new cFinishGenPassiveMobs(Seed, a_IniFile, Dimension)));
+		}
+		else if (NoCaseCompare(*itr, "BottomLava") == 0)
 		{
 			int DefaultBottomLavaLevel = (Dimension == dimNether) ? 30 : 10;
 			int BottomLavaLevel = a_IniFile.GetValueSetI("Generator", "BottomLavaLevel", DefaultBottomLavaLevel);
@@ -329,7 +345,7 @@ void cComposableGenerator::InitFinishGens(cIniFile & a_IniFile)
 			int     MaxSize       = a_IniFile.GetValueSetI("Generator", "DungeonRoomsMaxSize", 7);
 			int     MinSize       = a_IniFile.GetValueSetI("Generator", "DungeonRoomsMinSize", 5);
 			AString HeightDistrib = a_IniFile.GetValueSet ("Generator", "DungeonRoomsHeightDistrib", "0, 0; 10, 10; 11, 500; 40, 500; 60, 40; 90, 1");
-			m_FinishGens.push_back(cFinishGenPtr(new cDungeonRoomsFinisher(m_HeightGen, Seed, GridSize, MaxSize, MinSize, HeightDistrib)));
+			m_FinishGens.push_back(cFinishGenPtr(new cDungeonRoomsFinisher(m_ShapeGen, Seed, GridSize, MaxSize, MinSize, HeightDistrib)));
 		}
 		else if (NoCaseCompare(*itr, "Ice") == 0)
 		{
@@ -338,7 +354,7 @@ void cComposableGenerator::InitFinishGens(cIniFile & a_IniFile)
 		else if (NoCaseCompare(*itr, "LavaLakes") == 0)
 		{
 			int Probability = a_IniFile.GetValueSetI("Generator", "LavaLakesProbability", 10);
-			m_FinishGens.push_back(cFinishGenPtr(new cStructGenLakes(Seed * 5 + 16873, E_BLOCK_STATIONARY_LAVA, m_HeightGen, Probability)));
+			m_FinishGens.push_back(cFinishGenPtr(new cStructGenLakes(Seed * 5 + 16873, E_BLOCK_STATIONARY_LAVA, m_ShapeGen, Probability)));
 		}
 		else if (NoCaseCompare(*itr, "LavaSprings") == 0)
 		{
@@ -558,6 +574,10 @@ void cComposableGenerator::InitFinishGens(cIniFile & a_IniFile)
 				GridSize, MaxOffset
 			)));
 		}
+		else if (NoCaseCompare(*itr, "SoulsandRims") == 0)
+		{
+			m_FinishGens.push_back(cFinishGenPtr(new cFinishGenSoulsandRims(Seed)));
+		}
 		else if (NoCaseCompare(*itr, "Snow") == 0)
 		{
 			m_FinishGens.push_back(cFinishGenPtr(new cFinishGenSnow));
@@ -576,7 +596,7 @@ void cComposableGenerator::InitFinishGens(cIniFile & a_IniFile)
 		}
 		else if (NoCaseCompare(*itr, "Trees") == 0)
 		{
-			m_FinishGens.push_back(cFinishGenPtr(new cStructGenTrees(Seed, m_BiomeGen, m_HeightGen, m_CompositionGen)));
+			m_FinishGens.push_back(cFinishGenPtr(new cStructGenTrees(Seed, m_BiomeGen, m_ShapeGen, m_CompositionGen)));
 		}
 		else if (NoCaseCompare(*itr, "UnderwaterBases") == 0)
 		{
@@ -584,7 +604,7 @@ void cComposableGenerator::InitFinishGens(cIniFile & a_IniFile)
 			int MaxOffset = a_IniFile.GetValueSetI("Generator", "UnderwaterBaseMaxOffset", 128);
 			int MaxDepth  = a_IniFile.GetValueSetI("Generator", "UnderwaterBaseMaxDepth",    7);
 			int MaxSize   = a_IniFile.GetValueSetI("Generator", "UnderwaterBaseMaxSize",   128);
-			m_FinishGens.push_back(cFinishGenPtr(new cUnderwaterBaseGen(Seed, GridSize, MaxOffset, MaxDepth, MaxSize, m_BiomeGen)));
+			m_FinishGens.push_back(std::make_shared<cUnderwaterBaseGen>(Seed, GridSize, MaxOffset, MaxDepth, MaxSize, m_BiomeGen));
 		}
 		else if (NoCaseCompare(*itr, "Villages") == 0)
 		{
@@ -594,12 +614,12 @@ void cComposableGenerator::InitFinishGens(cIniFile & a_IniFile)
 			int MaxSize    = a_IniFile.GetValueSetI("Generator", "VillageMaxSize",   128);
 			int MinDensity = a_IniFile.GetValueSetI("Generator", "VillageMinDensity", 50);
 			int MaxDensity = a_IniFile.GetValueSetI("Generator", "VillageMaxDensity", 80);
-			m_FinishGens.push_back(cFinishGenPtr(new cVillageGen(Seed, GridSize, MaxOffset, MaxDepth, MaxSize, MinDensity, MaxDensity, m_BiomeGen, m_HeightGen)));
+			m_FinishGens.push_back(std::make_shared<cVillageGen>(Seed, GridSize, MaxOffset, MaxDepth, MaxSize, MinDensity, MaxDensity, m_BiomeGen, m_CompositedHeightCache));
 		}
 		else if (NoCaseCompare(*itr, "WaterLakes") == 0)
 		{
 			int Probability = a_IniFile.GetValueSetI("Generator", "WaterLakesProbability", 25);
-			m_FinishGens.push_back(cFinishGenPtr(new cStructGenLakes(Seed * 3 + 652, E_BLOCK_STATIONARY_WATER, m_HeightGen, Probability)));
+			m_FinishGens.push_back(cFinishGenPtr(new cStructGenLakes(Seed * 3 + 652, E_BLOCK_STATIONARY_WATER, m_ShapeGen, Probability)));
 		}
 		else if (NoCaseCompare(*itr, "WaterSprings") == 0)
 		{
diff --git a/src/Generating/ComposableGenerator.h b/src/Generating/ComposableGenerator.h
index a091f8d53..86c30e090 100644
--- a/src/Generating/ComposableGenerator.h
+++ b/src/Generating/ComposableGenerator.h
@@ -26,20 +26,16 @@ See http://forum.mc-server.org/showthread.php?tid=409 for details.
 
 // Forward-declare the shared pointers to subgenerator classes:
 class cBiomeGen;
+class cTerrainShapeGen;
 class cTerrainHeightGen;
 class cTerrainCompositionGen;
 class cFinishGen;
 typedef SharedPtr<cBiomeGen>              cBiomeGenPtr;
+typedef SharedPtr<cTerrainShapeGen>       cTerrainShapeGenPtr;
 typedef SharedPtr<cTerrainHeightGen>      cTerrainHeightGenPtr;
 typedef SharedPtr<cTerrainCompositionGen> cTerrainCompositionGenPtr;
 typedef SharedPtr<cFinishGen>             cFinishGenPtr;
 
-// fwd: Noise3DGenerator.h
-class cNoise3DComposable;
-
-// fwd: DistortedHeightmap.h
-class cDistortedHeightmap;
-
 
 
 
@@ -70,28 +66,54 @@ public:
 
 
 
-/** The interface that a terrain height generator must implement
-A terrain height generator takes chunk coords on input and outputs an array of terrain heights for that chunk.
-The output array is sequenced in the same way as the BiomeGen's biome data.
+/** The interface that a terrain shape generator must implement
+A terrain shape generator takes chunk coords on input and outputs a 3D array of "shape" for that chunk. The shape here
+represents the distinction between air and solid; there's no representation of Water since that is added by the
+composition geenrator.
+The output array is indexed [y + 256 * z + 16 * 256 * x], so that it's fast to later compose a single column of the terrain,
+which is the dominant operation following the shape generation.
 The generator may request biome information from the underlying BiomeGen, it may even request information for
-other chunks than the one it's currently generating (possibly neighbors - for averaging)
+other chunks than the one it's currently generating (neighbors - for averaging)
 */
-class cTerrainHeightGen
+class cTerrainShapeGen
 {
 public:
-	virtual ~cTerrainHeightGen() {}  // Force a virtual destructor in descendants
+	virtual ~cTerrainShapeGen() {}  // Force a virtual destructor in descendants
 	
-	/** Generates heightmap for the given chunk */
-	virtual void GenHeightMap(int a_ChunkX, int a_ChunkZ, cChunkDef::HeightMap & a_HeightMap) = 0;
+	/** Generates the shape for the given chunk */
+	virtual void GenShape(int a_ChunkX, int a_ChunkZ, cChunkDesc::Shape & a_Shape) = 0;
 	
 	/** Reads parameters from the ini file, prepares generator for use. */
-	virtual void InitializeHeightGen(cIniFile & a_IniFile) {}
+	virtual void InitializeShapeGen(cIniFile & a_IniFile) {}
 	
-	/** Creates the correct TerrainHeightGen descendant based on the ini file settings and the seed provided.
-	a_BiomeGen is the underlying biome generator, some height generators may depend on it to generate more biomes
+	/** Creates the correct TerrainShapeGen descendant based on the ini file settings and the seed provided.
+	a_BiomeGen is the underlying biome generator, some shape generators may depend on it providing additional biomes data around the chunk
 	a_CacheOffByDefault gets set to whether the cache should be disabled by default
-	Implemented in HeiGen.cpp!
+	Implemented in ShapeGen.cpp!
 	*/
+	static cTerrainShapeGenPtr CreateShapeGen(cIniFile & a_IniFile, cBiomeGenPtr a_BiomeGen, int a_Seed, bool & a_CacheOffByDefault);
+} ;
+
+
+
+
+
+/** The interface that is used to query terrain height from the shape generator.
+Usually the structure generators require only the final heightmap, and generating the whole shape only to
+consume the heightmap is wasteful, so this interface is used instead; it has a cache implemented over it so
+that data is retained. */
+class cTerrainHeightGen
+{
+public:
+	virtual ~cTerrainHeightGen() {}  // Force a virtual destructor in descendants
+
+	/** Retrieves the heightmap for the specified chunk. */
+	virtual void GenHeightMap(int a_ChunkX, int a_ChunkZ, cChunkDef::HeightMap & a_HeightMap) = 0;
+
+	/** Initializes the generator, reading its parameters from the INI file. */
+	virtual void InitializeHeightGen(cIniFile & a_IniFile) {}
+
+	/** Creates a cTerrainHeightGen descendant based on the INI file settings. */
 	static cTerrainHeightGenPtr CreateHeightGen(cIniFile & a_IniFile, cBiomeGenPtr a_BiomeGen, int a_Seed, bool & a_CacheOffByDefault);
 } ;
 
@@ -109,16 +131,18 @@ class cTerrainCompositionGen
 public:
 	virtual ~cTerrainCompositionGen() {}  // Force a virtual destructor in descendants
 	
-	virtual void ComposeTerrain(cChunkDesc & a_ChunkDesc) = 0;
+	/** Generates the chunk's composition into a_ChunkDesc, using the terrain shape provided in a_Shape.
+	Is expected to fill a_ChunkDesc's heightmap with the data from a_Shape. */
+	virtual void ComposeTerrain(cChunkDesc & a_ChunkDesc, const cChunkDesc::Shape & a_Shape) = 0;
 	
 	/** Reads parameters from the ini file, prepares generator for use. */
 	virtual void InitializeCompoGen(cIniFile & a_IniFile) {}
 	
 	/** Creates the correct TerrainCompositionGen descendant based on the ini file settings and the seed provided.
-	a_BiomeGen is the underlying biome generator, some composition generators may depend on it to generate more biomes
-	a_HeightGen is the underlying height generator, some composition generators may depend on it providing additional values
+	a_BiomeGen is the underlying biome generator, some composition generators may depend on it providing additional biomes around the chunk
+	a_ShapeGen is the underlying shape generator, some composition generators may depend on it providing additional shape around the chunk
 	*/
-	static cTerrainCompositionGenPtr CreateCompositionGen(cIniFile & a_IniFile, cBiomeGenPtr a_BiomeGen, cTerrainHeightGen & a_HeightGen, int a_Seed);
+	static cTerrainCompositionGenPtr CreateCompositionGen(cIniFile & a_IniFile, cBiomeGenPtr a_BiomeGen, cTerrainShapeGenPtr a_ShapeGen, int a_Seed);
 } ;
 
 
@@ -128,7 +152,7 @@ public:
 /** The interface that a finisher must implement
 Finisher implements changes to the chunk after the rough terrain has been generated.
 Examples of finishers are trees, snow, ore, lilypads and others.
-Note that a worldgenerator may contain multiple finishers.
+Note that a worldgenerator may contain multiple finishers, chained one after another.
 Also note that previously we used to distinguish between a structuregen and a finisher; this distinction is
 no longer relevant, all structure generators are considered finishers now (#398)
 */
@@ -154,23 +178,34 @@ class cComposableGenerator :
 public:
 	cComposableGenerator(cChunkGenerator & a_ChunkGenerator);
 	
+	// cChunkGenerator::cGenerator overrides:
 	virtual void Initialize(cIniFile & a_IniFile) override;
 	virtual void GenerateBiomes(int a_ChunkX, int a_ChunkZ, cChunkDef::BiomeMap & a_BiomeMap) override;
 	virtual void DoGenerate(int a_ChunkX, int a_ChunkZ, cChunkDesc & a_ChunkDesc) override;
 
 protected:
-	// The generation composition:
-	cBiomeGenPtr              m_BiomeGen;
-	cTerrainHeightGenPtr      m_HeightGen;
+	// The generator's composition:
+	/** The biome generator. */
+	cBiomeGenPtr m_BiomeGen;
+
+	/** The terrain shape generator. */
+	cTerrainShapeGenPtr m_ShapeGen;
+
+	/** The terrain composition generator. */
 	cTerrainCompositionGenPtr m_CompositionGen;
-	cFinishGenList            m_FinishGens;
+
+	/** The cache for the heights of the composited terrain. */
+	cTerrainHeightGenPtr m_CompositedHeightCache;
+
+	/** The finisher generators, in the order in which they are applied. */
+	cFinishGenList m_FinishGens;
 	
 	
-	/** Reads the biome gen settings from the ini and initializes m_BiomeGen accordingly */
+	/** Reads the BiomeGen settings from the ini and initializes m_BiomeGen accordingly */
 	void InitBiomeGen(cIniFile & a_IniFile);
 	
-	/** Reads the HeightGen settings from the ini and initializes m_HeightGen accordingly */
-	void InitHeightGen(cIniFile & a_IniFile);
+	/** Reads the ShapeGen settings from the ini and initializes m_ShapeGen accordingly */
+	void InitShapeGen(cIniFile & a_IniFile);
 	
 	/** Reads the CompositionGen settings from the ini and initializes m_CompositionGen accordingly */
 	void InitCompositionGen(cIniFile & a_IniFile);
diff --git a/src/Generating/CompositedHeiGen.h b/src/Generating/CompositedHeiGen.h
new file mode 100644
index 000000000..fa33a7861
--- /dev/null
+++ b/src/Generating/CompositedHeiGen.h
@@ -0,0 +1,49 @@
+
+// CompositedHeiGen.h
+
+// Declares the cCompositedHeiGen class representing a cTerrainHeightGen descendant that calculates heightmap of the composited terrain
+// This is used to further cache heightmaps for chunks already generated for finishers that require only heightmap information
+
+
+
+
+
+#pragma once
+
+#include "ComposableGenerator.h"
+
+
+
+
+
+class cCompositedHeiGen:
+	public cTerrainHeightGen
+{
+public:
+	cCompositedHeiGen(cTerrainShapeGenPtr a_ShapeGen, cTerrainCompositionGenPtr a_CompositionGen):
+		m_ShapeGen(a_ShapeGen),
+		m_CompositionGen(a_CompositionGen)
+	{
+	}
+
+
+
+	// cTerrainheightGen overrides:
+	virtual void GenHeightMap(int a_ChunkX, int a_ChunkZ, cChunkDef::HeightMap & a_HeightMap) override
+	{
+		cChunkDesc::Shape shape;
+		m_ShapeGen->GenShape(a_ChunkX, a_ChunkZ, shape);
+		cChunkDesc desc(a_ChunkX, a_ChunkZ);
+		desc.SetHeightFromShape(shape);
+		m_CompositionGen->ComposeTerrain(desc, shape);
+		memcpy(a_HeightMap, desc.GetHeightMap(), sizeof(a_HeightMap));
+	}
+
+protected:
+	cTerrainShapeGenPtr m_ShapeGen;
+	cTerrainCompositionGenPtr m_CompositionGen;
+};
+
+
+
+
diff --git a/src/Generating/DistortedHeightmap.cpp b/src/Generating/DistortedHeightmap.cpp
index aac1d2bf3..37a51c18e 100644
--- a/src/Generating/DistortedHeightmap.cpp
+++ b/src/Generating/DistortedHeightmap.cpp
@@ -15,163 +15,6 @@
 
 
 ////////////////////////////////////////////////////////////////////////////////
-// cPattern:
-
-/// This class is used to store a column pattern initialized at runtime,
-/// so that the program doesn't need to explicitly set 256 values for each pattern
-/// Each pattern has 256 blocks so that there's no need to check pattern bounds when assigning the
-/// pattern - there will always be enough pattern left, even for the whole chunk height
-class cPattern
-{
-public:
-	cPattern(cDistortedHeightmap::sBlockInfo * a_TopBlocks, size_t a_Count)
-	{
-		// Copy the pattern into the top:
-		for (size_t i = 0; i < a_Count; i++)
-		{
-			m_Pattern[i] = a_TopBlocks[i];
-		}
-		
-		// Fill the rest with stone:
-		static cDistortedHeightmap::sBlockInfo Stone = {E_BLOCK_STONE, 0};
-		for (size_t i = a_Count; i < cChunkDef::Height; i++)
-		{
-			m_Pattern[i] = Stone;
-		}
-	}
-	
-	const cDistortedHeightmap::sBlockInfo * Get(void) const { return m_Pattern; }
-	
-protected:
-	cDistortedHeightmap::sBlockInfo m_Pattern[cChunkDef::Height];
-} ;
-
-
-
-
-
-////////////////////////////////////////////////////////////////////////////////
-// The arrays to use for the top block pattern definitions:
-
-static cDistortedHeightmap::sBlockInfo tbGrass[] =
-{
-	{E_BLOCK_GRASS, 0},
-	{E_BLOCK_DIRT,  E_META_DIRT_NORMAL},
-	{E_BLOCK_DIRT,  E_META_DIRT_NORMAL},
-	{E_BLOCK_DIRT,  E_META_DIRT_NORMAL},
-} ;
-
-static cDistortedHeightmap::sBlockInfo tbSand[] =
-{
-	{ E_BLOCK_SAND, 0},
-	{ E_BLOCK_SAND, 0},
-	{ E_BLOCK_SAND, 0},
-	{ E_BLOCK_SANDSTONE, 0},
-} ;
-
-static cDistortedHeightmap::sBlockInfo tbDirt[] =
-{
-	{E_BLOCK_DIRT, E_META_DIRT_NORMAL},
-	{E_BLOCK_DIRT, E_META_DIRT_NORMAL},
-	{E_BLOCK_DIRT, E_META_DIRT_NORMAL},
-	{E_BLOCK_DIRT, E_META_DIRT_NORMAL},
-} ;
-
-static cDistortedHeightmap::sBlockInfo tbPodzol[] =
-{
-	{E_BLOCK_DIRT, E_META_DIRT_PODZOL},
-	{E_BLOCK_DIRT, E_META_DIRT_NORMAL},
-	{E_BLOCK_DIRT, E_META_DIRT_NORMAL},
-	{E_BLOCK_DIRT, E_META_DIRT_NORMAL},
-} ;
-
-static cDistortedHeightmap::sBlockInfo tbGrassLess[] =
-{
-	{E_BLOCK_DIRT, E_META_DIRT_GRASSLESS},
-	{E_BLOCK_DIRT, E_META_DIRT_NORMAL},
-	{E_BLOCK_DIRT, E_META_DIRT_NORMAL},
-	{E_BLOCK_DIRT, E_META_DIRT_NORMAL},
-} ;
-
-static cDistortedHeightmap::sBlockInfo tbMycelium[] =
-{
-	{E_BLOCK_MYCELIUM, 0},
-	{E_BLOCK_DIRT,     0},
-	{E_BLOCK_DIRT,     0},
-	{E_BLOCK_DIRT,     0},
-} ;
-
-static cDistortedHeightmap::sBlockInfo tbGravel[] =
-{
-	{E_BLOCK_GRAVEL, 0},
-	{E_BLOCK_GRAVEL, 0},
-	{E_BLOCK_GRAVEL, 0},
-	{E_BLOCK_STONE,  0},
-} ;
-
-static cDistortedHeightmap::sBlockInfo tbStone[] =
-{
-	{E_BLOCK_STONE,   0},
-	{E_BLOCK_STONE,   0},
-	{E_BLOCK_STONE,   0},
-	{E_BLOCK_STONE,   0},
-} ;
-
-
-
-////////////////////////////////////////////////////////////////////////////////
-// Ocean floor pattern top-block definitions:
-
-static cDistortedHeightmap::sBlockInfo tbOFSand[] =
-{
-	{E_BLOCK_SAND, 0},
-	{E_BLOCK_SAND, 0},
-	{E_BLOCK_SAND, 0},
-	{E_BLOCK_SANDSTONE, 0}
-} ;
-
-static cDistortedHeightmap::sBlockInfo tbOFClay[] =
-{
-	{ E_BLOCK_CLAY, 0},
-	{ E_BLOCK_CLAY, 0},
-	{ E_BLOCK_SAND, 0},
-	{ E_BLOCK_SAND, 0},
-} ;
-
-static cDistortedHeightmap::sBlockInfo tbOFRedSand[] =
-{
-	{ E_BLOCK_SAND,      E_META_SAND_RED},
-	{ E_BLOCK_SAND,      E_META_SAND_RED},
-	{ E_BLOCK_SAND,      E_META_SAND_RED},
-	{ E_BLOCK_SANDSTONE, 0},
-} ;
-
-
-
-
-
-
-////////////////////////////////////////////////////////////////////////////////
-// Individual patterns to use:
-
-static cPattern patGrass    (tbGrass,     ARRAYCOUNT(tbGrass));
-static cPattern patSand     (tbSand,      ARRAYCOUNT(tbSand));
-static cPattern patDirt     (tbDirt,      ARRAYCOUNT(tbDirt));
-static cPattern patPodzol   (tbPodzol,    ARRAYCOUNT(tbPodzol));
-static cPattern patGrassLess(tbGrassLess, ARRAYCOUNT(tbGrassLess));
-static cPattern patMycelium (tbMycelium,  ARRAYCOUNT(tbMycelium));
-static cPattern patGravel   (tbGravel,    ARRAYCOUNT(tbGravel));
-static cPattern patStone    (tbStone,     ARRAYCOUNT(tbStone));
-
-static cPattern patOFSand   (tbOFSand,    ARRAYCOUNT(tbOFSand));
-static cPattern patOFClay   (tbOFClay,    ARRAYCOUNT(tbOFClay));
-static cPattern patOFRedSand(tbOFRedSand, ARRAYCOUNT(tbOFRedSand));
-
-
-
-
-
-////////////////////////////////////////////////////////////////////////////////
 // cDistortedHeightmap:
 
 /** This table assigns a relative maximum overhang size in each direction to biomes.
@@ -227,17 +70,17 @@ const cDistortedHeightmap::sGenParam cDistortedHeightmap::m_GenParam[256] =
 	/* biMesaPlateau      */ { 2.0f,  2.0f},  // 39
 	
 	// biomes 40 .. 128 are unused, 89 empty placeholders here:
-	{}, {}, {}, {}, {}, {}, {}, {}, {}, {},  // 40 .. 49
-	{}, {}, {}, {}, {}, {}, {}, {}, {}, {},  // 50 .. 59
-	{}, {}, {}, {}, {}, {}, {}, {}, {}, {},  // 60 .. 69
-	{}, {}, {}, {}, {}, {}, {}, {}, {}, {},  // 70 .. 79
-	{}, {}, {}, {}, {}, {}, {}, {}, {}, {},  // 80 .. 89
-	{}, {}, {}, {}, {}, {}, {}, {}, {}, {},  // 90 .. 99
-	{}, {}, {}, {}, {}, {}, {}, {}, {}, {},  // 100 .. 109
-	{}, {}, {}, {}, {}, {}, {}, {}, {}, {},  // 110 .. 119
-	{}, {}, {}, {}, {}, {}, {}, {}, {},      // 120 .. 128
+	{0.0f, 0.0f}, {0.0f, 0.0f}, {0.0f, 0.0f}, {0.0f, 0.0f}, {0.0f, 0.0f}, {0.0f, 0.0f}, {0.0f, 0.0f}, {0.0f, 0.0f}, {0.0f, 0.0f}, {0.0f, 0.0f},  // 40 .. 49
+	{0.0f, 0.0f}, {0.0f, 0.0f}, {0.0f, 0.0f}, {0.0f, 0.0f}, {0.0f, 0.0f}, {0.0f, 0.0f}, {0.0f, 0.0f}, {0.0f, 0.0f}, {0.0f, 0.0f}, {0.0f, 0.0f},  // 50 .. 59
+	{0.0f, 0.0f}, {0.0f, 0.0f}, {0.0f, 0.0f}, {0.0f, 0.0f}, {0.0f, 0.0f}, {0.0f, 0.0f}, {0.0f, 0.0f}, {0.0f, 0.0f}, {0.0f, 0.0f}, {0.0f, 0.0f},  // 60 .. 69
+	{0.0f, 0.0f}, {0.0f, 0.0f}, {0.0f, 0.0f}, {0.0f, 0.0f}, {0.0f, 0.0f}, {0.0f, 0.0f}, {0.0f, 0.0f}, {0.0f, 0.0f}, {0.0f, 0.0f}, {0.0f, 0.0f},  // 70 .. 79
+	{0.0f, 0.0f}, {0.0f, 0.0f}, {0.0f, 0.0f}, {0.0f, 0.0f}, {0.0f, 0.0f}, {0.0f, 0.0f}, {0.0f, 0.0f}, {0.0f, 0.0f}, {0.0f, 0.0f}, {0.0f, 0.0f},  // 80 .. 89
+	{0.0f, 0.0f}, {0.0f, 0.0f}, {0.0f, 0.0f}, {0.0f, 0.0f}, {0.0f, 0.0f}, {0.0f, 0.0f}, {0.0f, 0.0f}, {0.0f, 0.0f}, {0.0f, 0.0f}, {0.0f, 0.0f},  // 90 .. 99
+	{0.0f, 0.0f}, {0.0f, 0.0f}, {0.0f, 0.0f}, {0.0f, 0.0f}, {0.0f, 0.0f}, {0.0f, 0.0f}, {0.0f, 0.0f}, {0.0f, 0.0f}, {0.0f, 0.0f}, {0.0f, 0.0f},  // 100 .. 109
+	{0.0f, 0.0f}, {0.0f, 0.0f}, {0.0f, 0.0f}, {0.0f, 0.0f}, {0.0f, 0.0f}, {0.0f, 0.0f}, {0.0f, 0.0f}, {0.0f, 0.0f}, {0.0f, 0.0f}, {0.0f, 0.0f},  // 110 .. 119
+	{0.0f, 0.0f}, {0.0f, 0.0f}, {0.0f, 0.0f}, {0.0f, 0.0f}, {0.0f, 0.0f}, {0.0f, 0.0f}, {0.0f, 0.0f}, {0.0f, 0.0f}, {0.0f, 0.0f},                // 120 .. 128
 	
-	// Release 1.7 /* biome variants:
+	// Release 1.7 biome variants:
 	/* biSunflowerPlains      */ { 1.0f,  1.0f},  // 129
 	/* biDesertM              */ { 1.0f,  1.0f},  // 130
 	/* biExtremeHillsM        */ {16.0f, 16.0f},  // 131
@@ -246,22 +89,22 @@ const cDistortedHeightmap::sGenParam cDistortedHeightmap::m_GenParam[256] =
 	/* biSwamplandM           */ { 0.0f,  0.0f},  // 134
 	
 	// Biomes 135 .. 139 unused, 5 empty placeholders here:
-	{}, {}, {}, {}, {},                           // 135 .. 139
+	{0.0f, 0.0f}, {0.0f, 0.0f}, {0.0f, 0.0f}, {0.0f, 0.0f}, {0.0f, 0.0f},  // 135 .. 139
 
 	/* biIcePlainsSpikes      */ { 1.0f,  1.0f},  // 140
 	
 	// Biomes 141 .. 148 unused, 8 empty placeholders here:
-	{}, {}, {}, {}, {}, {}, {}, {},               // 141 .. 148
+	{0.0f, 0.0f}, {0.0f, 0.0f}, {0.0f, 0.0f}, {0.0f, 0.0f}, {0.0f, 0.0f}, {0.0f, 0.0f}, {0.0f, 0.0f}, {0.0f, 0.0f},  // 141 .. 148
 
 	/* biJungleM              */ { 4.0f,  4.0f},  // 149
-	{},                                           // 150
+	{0.0f, 0.0f},                                 // 150
 	/* biJungleEdgeM          */ { 3.0f,  3.0f},  // 151
-	{}, {}, {},                                   // 152 .. 154
+	{0.0f, 0.0f}, {0.0f, 0.0f}, {0.0f, 0.0f},     // 152 .. 154
 	/* biBirchForestM         */ { 3.0f,  3.0f},  // 155
 	/* biBirchForestHillsM    */ { 5.0f,  5.0f},  // 156
 	/* biRoofedForestM        */ { 2.0f,  2.0f},  // 157
 	/* biColdTaigaM           */ { 1.0f,  1.0f},  // 158
-	{},                                           // 159
+	{0.0f, 0.0f},                                 // 159
 	/* biMegaSpruceTaiga      */ { 3.0f,  3.0f},  // 160
 	/* biMegaSpruceTaigaHills */ { 3.0f,  3.0f},  // 161
 	/* biExtremeHillsPlusM    */ {32.0f, 32.0f},  // 162
@@ -279,8 +122,8 @@ const cDistortedHeightmap::sGenParam cDistortedHeightmap::m_GenParam[256] =
 cDistortedHeightmap::cDistortedHeightmap(int a_Seed, cBiomeGenPtr a_BiomeGen) :
 	m_NoiseDistortX(a_Seed + 1000),
 	m_NoiseDistortZ(a_Seed + 2000),
-	m_OceanFloorSelect(a_Seed + 3000),
-	m_MesaFloor(a_Seed + 4000),
+	m_CurChunkX(0x7fffffff),  // Set impossible coords for the chunk so that it's always considered stale
+	m_CurChunkZ(0x7fffffff),
 	m_BiomeGen(a_BiomeGen),
 	m_UnderlyingHeiGen(new cHeiGenBiomal(a_Seed, a_BiomeGen)),
 	m_HeightGen(m_UnderlyingHeiGen, 64),
@@ -293,8 +136,6 @@ cDistortedHeightmap::cDistortedHeightmap(int a_Seed, cBiomeGenPtr a_BiomeGen) :
 	m_NoiseDistortZ.AddOctave((NOISE_DATATYPE)1,    (NOISE_DATATYPE)0.5);
 	m_NoiseDistortZ.AddOctave((NOISE_DATATYPE)0.5,  (NOISE_DATATYPE)1);
 	m_NoiseDistortZ.AddOctave((NOISE_DATATYPE)0.25, (NOISE_DATATYPE)2);
-	
-	InitMesaPattern(a_Seed);
 }
 
 
@@ -309,7 +150,7 @@ void cDistortedHeightmap::Initialize(cIniFile & a_IniFile)
 	}
 
 	// Read the params from the INI file:
-	m_SeaLevel   =                 a_IniFile.GetValueSetI("Generator", "DistortedHeightmapSeaLevel",   62);
+	m_SeaLevel   =                 a_IniFile.GetValueSetI("Generator", "SeaLevel",                     62);
 	m_FrequencyX = (NOISE_DATATYPE)a_IniFile.GetValueSetF("Generator", "DistortedHeightmapFrequencyX", 10);
 	m_FrequencyY = (NOISE_DATATYPE)a_IniFile.GetValueSetF("Generator", "DistortedHeightmapFrequencyY", 10);
 	m_FrequencyZ = (NOISE_DATATYPE)a_IniFile.GetValueSetF("Generator", "DistortedHeightmapFrequencyZ", 10);
@@ -321,89 +162,6 @@ void cDistortedHeightmap::Initialize(cIniFile & a_IniFile)
 
 
 
-void cDistortedHeightmap::InitMesaPattern(int a_Seed)
-{
-	// Stone in the bottom half of the pattern:
-	for (int i = cChunkDef::Height; i < 2 * cChunkDef::Height; i++)
-	{
-		m_MesaPattern[i].BlockMeta = 0;
-		m_MesaPattern[i].BlockType = E_BLOCK_STONE;
-	}
-
-	// Stained and hardened clay in the top half of the pattern
-	// In a loop, choose whether to use one or two layers of stained clay, then choose a color and width for each layer
-	// Separate each group with another layer of hardened clay
-	cNoise PatternNoise((unsigned)a_Seed);
-	static NIBBLETYPE AllowedColors[] =
-	{
-		E_META_STAINED_CLAY_YELLOW,
-		E_META_STAINED_CLAY_YELLOW,
-		E_META_STAINED_CLAY_RED,
-		E_META_STAINED_CLAY_RED,
-		E_META_STAINED_CLAY_WHITE,
-		E_META_STAINED_CLAY_BROWN,
-		E_META_STAINED_CLAY_BROWN,
-		E_META_STAINED_CLAY_BROWN,
-		E_META_STAINED_CLAY_ORANGE,
-		E_META_STAINED_CLAY_ORANGE,
-		E_META_STAINED_CLAY_ORANGE,
-		E_META_STAINED_CLAY_ORANGE,
-		E_META_STAINED_CLAY_ORANGE,
-		E_META_STAINED_CLAY_ORANGE,
-		E_META_STAINED_CLAY_LIGHTGRAY,
-	} ;
-	static int LayerSizes[] =  // Adjust the chance so that thinner layers occur more commonly
-	{
-		1, 1, 1, 1, 1, 1,
-		2, 2, 2, 2,
-		3, 3,
-	} ;
-	int Idx = cChunkDef::Height - 1;
-	while (Idx >= 0)
-	{
-		// A layer group of 1 - 2 color stained clay:
-		int Random = PatternNoise.IntNoise1DInt(Idx) / 7;
-		int NumLayers = (Random % 2) + 1;
-		Random /= 2;
-		for (int Lay = 0; Lay < NumLayers; Lay++)
-		{
-			int NumBlocks = LayerSizes[(Random % ARRAYCOUNT(LayerSizes))];
-			NIBBLETYPE Color = AllowedColors[(Random / 4) % ARRAYCOUNT(AllowedColors)];
-			if (
-				((NumBlocks == 3) && (NumLayers == 2)) ||  // In two-layer mode disallow the 3-high layers:
-				(Color == E_META_STAINED_CLAY_WHITE))      // White stained clay can ever be only 1 block high
-			{
-				NumBlocks = 1;
-			}
-			NumBlocks = std::min(Idx + 1, NumBlocks);  // Limit by Idx so that we don't have to check inside the loop
-			Random /= 32;
-			for (int Block = 0; Block < NumBlocks; Block++, Idx--)
-			{
-				m_MesaPattern[Idx].BlockMeta = Color;
-				m_MesaPattern[Idx].BlockType = E_BLOCK_STAINED_CLAY;
-			}  // for Block
-		}  // for Lay
-
-		// A layer of hardened clay in between the layer group:
-		int NumBlocks = (Random % 4) + 1;  // All heights the same probability
-		if ((NumLayers == 2) && (NumBlocks < 4))
-		{
-			// For two layers of stained clay, add an extra block of hardened clay:
-			NumBlocks++;
-		}
-		NumBlocks = std::min(Idx + 1, NumBlocks);  // Limit by Idx so that we don't have to check inside the loop
-		for (int Block = 0; Block < NumBlocks; Block++, Idx--)
-		{
-			m_MesaPattern[Idx].BlockMeta = 0;
-			m_MesaPattern[Idx].BlockType = E_BLOCK_HARDENED_CLAY;
-		}  // for Block
-	}  // while (Idx >= 0)
-}
-
-
-
-
-
 void cDistortedHeightmap::PrepareState(int a_ChunkX, int a_ChunkZ)
 {
 	if ((m_CurChunkX == a_ChunkX) && (m_CurChunkZ == a_ChunkZ))
@@ -474,23 +232,17 @@ void cDistortedHeightmap::GenerateHeightArray(void)
 
 
 
-void cDistortedHeightmap::GenHeightMap(int a_ChunkX, int a_ChunkZ, cChunkDef::HeightMap & a_HeightMap)
+void cDistortedHeightmap::GenShape(int a_ChunkX, int a_ChunkZ, cChunkDesc::Shape & a_Shape)
 {
 	PrepareState(a_ChunkX, a_ChunkZ);
 	for (int z = 0; z < cChunkDef::Width; z++)
 	{
 		for (int x = 0; x < cChunkDef::Width; x++)
 		{
-			int NoiseArrayIdx = x + 17 * 257 * z;
-			cChunkDef::SetHeight(a_HeightMap, x, z, m_SeaLevel - 1);
-			for (int y = cChunkDef::Height - 1; y > m_SeaLevel - 1; y--)
+			int idx = x + 17 * 257 * z;
+			for (int y = 0; y < cChunkDef::Height; y++)
 			{
-				int HeightMapHeight = (int)m_DistortedHeightmap[NoiseArrayIdx + 17 * y];
-				if (y < HeightMapHeight)
-				{
-					cChunkDef::SetHeight(a_HeightMap, x, z, y);
-					break;
-				}
+				a_Shape[y + x * 256 + z * 16 * 256] = (y < m_DistortedHeightmap[idx + y * 17]) ? 1 : 0;
 			}  // for y
 		}  // for x
 	}  // for z
@@ -500,36 +252,7 @@ void cDistortedHeightmap::GenHeightMap(int a_ChunkX, int a_ChunkZ, cChunkDef::He
 
 
 
-void cDistortedHeightmap::InitializeHeightGen(cIniFile & a_IniFile)
-{
-	Initialize(a_IniFile);
-}
-
-
-
-
-
-void cDistortedHeightmap::ComposeTerrain(cChunkDesc & a_ChunkDesc)
-{
-	// Prepare the internal state for generating this chunk:
-	PrepareState(a_ChunkDesc.GetChunkX(), a_ChunkDesc.GetChunkZ());
-
-	// Compose:
-	a_ChunkDesc.FillBlocks(E_BLOCK_AIR, 0);
-	for (int z = 0; z < cChunkDef::Width; z++)
-	{
-		for (int x = 0; x < cChunkDef::Width; x++)
-		{
-			ComposeColumn(a_ChunkDesc, x, z);
-		}  // for x
-	}  // for z
-}
-
-
-
-
-
-void cDistortedHeightmap::InitializeCompoGen(cIniFile & a_IniFile)
+void cDistortedHeightmap::InitializeShapeGen(cIniFile & a_IniFile)
 {
 	Initialize(a_IniFile);
 }
@@ -654,275 +377,3 @@ void cDistortedHeightmap::GetDistortAmpsAt(BiomeNeighbors & a_Neighbors, int a_R
 
 
 
-void cDistortedHeightmap::ComposeColumn(cChunkDesc & a_ChunkDesc, int a_RelX, int a_RelZ)
-{
-	// Frequencies for the podzol floor selecting noise:
-	const NOISE_DATATYPE FrequencyX = 8;
-	const NOISE_DATATYPE FrequencyZ = 8;
-	
-	EMCSBiome Biome = a_ChunkDesc.GetBiome(a_RelX, a_RelZ);
-	switch (Biome)
-	{
-		case biOcean:
-		case biPlains:
-		case biForest:
-		case biTaiga:
-		case biSwampland:
-		case biRiver:
-		case biFrozenOcean:
-		case biFrozenRiver:
-		case biIcePlains:
-		case biIceMountains:
-		case biForestHills:
-		case biTaigaHills:
-		case biExtremeHillsEdge:
-		case biExtremeHillsPlus:
-		case biExtremeHills:
-		case biJungle:
-		case biJungleHills:
-		case biJungleEdge:
-		case biDeepOcean:
-		case biStoneBeach:
-		case biColdBeach:
-		case biBirchForest:
-		case biBirchForestHills:
-		case biRoofedForest:
-		case biColdTaiga:
-		case biColdTaigaHills:
-		case biSavanna:
-		case biSavannaPlateau:
-		case biSunflowerPlains:
-		case biFlowerForest:
-		case biTaigaM:
-		case biSwamplandM:
-		case biIcePlainsSpikes:
-		case biJungleM:
-		case biJungleEdgeM:
-		case biBirchForestM:
-		case biBirchForestHillsM:
-		case biRoofedForestM:
-		case biColdTaigaM:
-		case biSavannaM:
-		case biSavannaPlateauM:
-		{
-			FillColumnPattern(a_ChunkDesc, a_RelX, a_RelZ, patGrass.Get());
-			return;
-		}
-
-		case biMegaTaiga:
-		case biMegaTaigaHills:
-		case biMegaSpruceTaiga:
-		case biMegaSpruceTaigaHills:
-		{
-			// Select the pattern to use - podzol, grass or grassless dirt:
-			NOISE_DATATYPE NoiseX = ((NOISE_DATATYPE)(m_CurChunkX * cChunkDef::Width + a_RelX)) / FrequencyX;
-			NOISE_DATATYPE NoiseY = ((NOISE_DATATYPE)(m_CurChunkZ * cChunkDef::Width + a_RelZ)) / FrequencyZ;
-			NOISE_DATATYPE Val = m_OceanFloorSelect.CubicNoise2D(NoiseX, NoiseY);
-			const sBlockInfo * Pattern = (Val < -0.9) ? patGrassLess.Get() : ((Val > 0) ? patPodzol.Get() : patGrass.Get());
-			FillColumnPattern(a_ChunkDesc, a_RelX, a_RelZ, Pattern);
-			return;
-		}
-
-		case biDesertHills:
-		case biDesert:
-		case biDesertM:
-		case biBeach:
-		{
-			FillColumnPattern(a_ChunkDesc, a_RelX, a_RelZ, patSand.Get());
-			return;
-		}
-		
-		case biMushroomIsland:
-		case biMushroomShore:
-		{
-			FillColumnPattern(a_ChunkDesc, a_RelX, a_RelZ, patMycelium.Get());
-			return;
-		}
-
-		case biMesa:
-		case biMesaPlateauF:
-		case biMesaPlateau:
-		case biMesaBryce:
-		case biMesaPlateauFM:
-		case biMesaPlateauM:
-		{
-			// Mesa biomes need special handling, because they don't follow the usual "4 blocks from top pattern",
-			// instead, they provide a "from bottom" pattern with varying base height,
-			// usually 4 blocks below the ocean level
-			FillColumnMesa(a_ChunkDesc, a_RelX, a_RelZ);
-			return;
-		}
-
-		case biExtremeHillsPlusM:
-		case biExtremeHillsM:
-		{
-			// Select the pattern to use - gravel, stone or grass:
-			NOISE_DATATYPE NoiseX = ((NOISE_DATATYPE)(m_CurChunkX * cChunkDef::Width + a_RelX)) / FrequencyX;
-			NOISE_DATATYPE NoiseY = ((NOISE_DATATYPE)(m_CurChunkZ * cChunkDef::Width + a_RelZ)) / FrequencyZ;
-			NOISE_DATATYPE Val = m_OceanFloorSelect.CubicNoise2D(NoiseX, NoiseY);
-			const sBlockInfo * Pattern = (Val < 0.0) ? patStone.Get() : patGrass.Get();
-			FillColumnPattern(a_ChunkDesc, a_RelX, a_RelZ, Pattern);
-			return;
-		}
-		default:
-		{
-			ASSERT(!"Unhandled biome");
-			return;
-		}
-	}  // switch (Biome)
-}
-
-
-
-
-
-void cDistortedHeightmap::FillColumnPattern(cChunkDesc & a_ChunkDesc, int a_RelX, int a_RelZ, const sBlockInfo * a_Pattern)
-{
-	int NoiseArrayIdx = a_RelX + 17 * 257 * a_RelZ;
-	bool HasHadWater = false;
-	int PatternIdx = 0;
-	for (int y = a_ChunkDesc.GetHeight(a_RelX, a_RelZ); y > 0; y--)
-	{
-		int HeightMapHeight = (int)m_DistortedHeightmap[NoiseArrayIdx + 17 * y];
-
-		if (y < HeightMapHeight)
-		{
-			// "ground" part, use the pattern:
-			a_ChunkDesc.SetBlockTypeMeta(a_RelX, y, a_RelZ, a_Pattern[PatternIdx].BlockType, a_Pattern[PatternIdx].BlockMeta);
-			PatternIdx++;
-			continue;
-		}
-		
-		// "air" or "water" part:
-		// Reset the pattern index to zero, so that the pattern is repeated from the top again:
-		PatternIdx = 0;
-		
-		if (y >= m_SeaLevel)
-		{
-			// "air" part, do nothing
-			continue;
-		}
-		
-		a_ChunkDesc.SetBlockType(a_RelX, y, a_RelZ, E_BLOCK_STATIONARY_WATER);
-		if (HasHadWater)
-		{
-			continue;
-		}
-		
-		// Select the ocean-floor pattern to use:
-		a_Pattern = a_ChunkDesc.GetBiome(a_RelX, a_RelZ) == biDeepOcean ? patGravel.Get() : ChooseOceanFloorPattern(a_RelX, a_RelZ);
-		HasHadWater = true;
-	}  // for y
-	a_ChunkDesc.SetBlockType(a_RelX, 0, a_RelZ, E_BLOCK_BEDROCK);
-}
-
-
-
-
-
-void cDistortedHeightmap::FillColumnMesa(cChunkDesc & a_ChunkDesc, int a_RelX, int a_RelZ)
-{
-	// Frequencies for the clay floor noise:
-	const NOISE_DATATYPE FrequencyX = 50;
-	const NOISE_DATATYPE FrequencyZ = 50;
-
-	int Top = a_ChunkDesc.GetHeight(a_RelX, a_RelZ);
-	if (Top < m_SeaLevel)
-	{
-		// The terrain is below sealevel, handle as regular ocean:
-		FillColumnPattern(a_ChunkDesc, a_RelX, a_RelZ, patOFRedSand.Get());
-		return;
-	}
-
-	NOISE_DATATYPE NoiseX = ((NOISE_DATATYPE)(m_CurChunkX * cChunkDef::Width + a_RelX)) / FrequencyX;
-	NOISE_DATATYPE NoiseY = ((NOISE_DATATYPE)(m_CurChunkZ * cChunkDef::Width + a_RelZ)) / FrequencyZ;
-	int ClayFloor = m_SeaLevel - 6 + (int)(4.f * m_MesaFloor.CubicNoise2D(NoiseX, NoiseY));
-	if (ClayFloor >= Top)
-	{
-		ClayFloor = Top - 1;
-	}
-	
-	if (Top - m_SeaLevel < 5)
-	{
-		// Simple case: top is red sand, then hardened clay down to ClayFloor, then stone:
-		a_ChunkDesc.SetBlockTypeMeta(a_RelX, Top, a_RelZ, E_BLOCK_SAND, E_META_SAND_RED);
-		for (int y = Top - 1; y >= ClayFloor; y--)
-		{
-			a_ChunkDesc.SetBlockType(a_RelX, y, a_RelZ, E_BLOCK_HARDENED_CLAY);
-		}
-		for (int y = ClayFloor - 1; y > 0; y--)
-		{
-			a_ChunkDesc.SetBlockType(a_RelX, y, a_RelZ, E_BLOCK_STONE);
-		}
-		a_ChunkDesc.SetBlockType(a_RelX, 0, a_RelZ, E_BLOCK_BEDROCK);
-		return;
-	}
-	
-	// Difficult case: use the mesa pattern and watch for overhangs:
-	int NoiseArrayIdx = a_RelX + 17 * 257 * a_RelZ;
-	int PatternIdx = cChunkDef::Height - (Top - ClayFloor);  // We want the block at index ClayFloor to be pattern's 256th block (first stone)
-	const sBlockInfo * Pattern = m_MesaPattern;
-	bool HasHadWater = false;
-	for (int y = Top; y > 0; y--)
-	{
-		int HeightMapHeight = (int)m_DistortedHeightmap[NoiseArrayIdx + 17 * y];
-		if (y < HeightMapHeight)
-		{
-			// "ground" part, use the pattern:
-			a_ChunkDesc.SetBlockTypeMeta(a_RelX, y, a_RelZ, Pattern[PatternIdx].BlockType, Pattern[PatternIdx].BlockMeta);
-			PatternIdx++;
-			continue;
-		}
-
-		if (y >= m_SeaLevel)
-		{
-			// "air" part, do nothing
-			continue;
-		}
-		
-		// "water" part, fill with water and choose new pattern for ocean floor, if not chosen already:
-		PatternIdx = 0;
-		a_ChunkDesc.SetBlockType(a_RelX, y, a_RelZ, E_BLOCK_STATIONARY_WATER);
-		if (HasHadWater)
-		{
-			continue;
-		}
-		
-		// Select the ocean-floor pattern to use:
-		Pattern = ChooseOceanFloorPattern(a_RelX, a_RelZ);
-		HasHadWater = true;
-	}  // for y
-	a_ChunkDesc.SetBlockType(a_RelX, 0, a_RelZ, E_BLOCK_BEDROCK);
-}
-
-
-
-
-
-const cDistortedHeightmap::sBlockInfo * cDistortedHeightmap::ChooseOceanFloorPattern(int a_RelX, int a_RelZ)
-{
-	// Frequencies for the ocean floor selecting noise:
-	const NOISE_DATATYPE FrequencyX = 3;
-	const NOISE_DATATYPE FrequencyZ = 3;
-
-	// Select the ocean-floor pattern to use:
-	NOISE_DATATYPE NoiseX = ((NOISE_DATATYPE)(m_CurChunkX * cChunkDef::Width + a_RelX)) / FrequencyX;
-	NOISE_DATATYPE NoiseY = ((NOISE_DATATYPE)(m_CurChunkZ * cChunkDef::Width + a_RelZ)) / FrequencyZ;
-	NOISE_DATATYPE Val = m_OceanFloorSelect.CubicNoise2D(NoiseX, NoiseY);
-	if (Val < -0.95)
-	{
-		return patOFClay.Get();
-	}
-	else if (Val < 0)
-	{
-		return patOFSand.Get();
-	}
-	else
-	{
-		return patDirt.Get();
-	}
-}
-
-
-
-
diff --git a/src/Generating/DistortedHeightmap.h b/src/Generating/DistortedHeightmap.h
index d073f29e4..79fc35542 100644
--- a/src/Generating/DistortedHeightmap.h
+++ b/src/Generating/DistortedHeightmap.h
@@ -11,7 +11,6 @@
 
 #include "ComposableGenerator.h"
 #include "HeiGen.h"
-#include "../Noise.h"
 
 
 
@@ -24,17 +23,9 @@
 
 
 class cDistortedHeightmap :
-	public cTerrainHeightGen,
-	public cTerrainCompositionGen
+	public cTerrainShapeGen
 {
 public:
-	/// Structure used for storing block patterns for columns
-	struct sBlockInfo
-	{
-		BLOCKTYPE  BlockType;
-		NIBBLETYPE BlockMeta;
-	} ;
-
 	cDistortedHeightmap(int a_Seed, cBiomeGenPtr a_BiomeGen);
 	
 protected:
@@ -52,8 +43,6 @@ protected:
 
 	cPerlinNoise m_NoiseDistortX;
 	cPerlinNoise m_NoiseDistortZ;
-	cNoise       m_OceanFloorSelect;  ///< Used for selecting between dirt and sand on the ocean floor
-	cNoise       m_MesaFloor;         ///< Used for the floor of the clay blocks in mesa biomes
 
 	int m_SeaLevel;
 	NOISE_DATATYPE m_FrequencyX;
@@ -71,9 +60,9 @@ protected:
 	cTerrainHeightGenPtr m_UnderlyingHeiGen;
 
 	/** Cache for m_UnderlyingHeiGen. */
-	cHeiGenCache  m_HeightGen;
+	cHeiGenCache m_HeightGen;
 	
-	/// Heightmap for the current chunk, before distortion (from m_HeightGen). Used for optimization.
+	/** Heightmap for the current chunk, before distortion (from m_HeightGen). Used for optimization. */
 	cChunkDef::HeightMap m_CurChunkHeights;
 	
 	// Per-biome terrain generator parameters:
@@ -88,54 +77,30 @@ protected:
 	NOISE_DATATYPE m_DistortAmpX[DIM_X * DIM_Z];
 	NOISE_DATATYPE m_DistortAmpZ[DIM_X * DIM_Z];
 	
-	/// True if Initialize() has been called. Used to initialize-once even with multiple init entrypoints (HeiGen / CompoGen)
+	/** True if Initialize() has been called. Used to initialize-once even with multiple init entrypoints (HeiGen / CompoGen). */
 	bool m_IsInitialized;
 	
-	/// The vertical pattern to be used for mesa biomes. Seed-dependant.
-	/// One Height of pattern and one Height of stone to avoid checking pattern dimensions
-	sBlockInfo m_MesaPattern[2 * cChunkDef::Height];
-	
 
-	/// Initializes m_MesaPattern with a reasonable pattern of stained clay / hardened clay, based on the seed
-	void InitMesaPattern(int a_Seed);
-	
-	/// Unless the LastChunk coords are equal to coords given, prepares the internal state (noise arrays, heightmap)
+	/** Unless the LastChunk coords are equal to coords given, prepares the internal state (noise arrays, heightmap). */
 	void PrepareState(int a_ChunkX, int a_ChunkZ);
 	
-	/// Generates the m_DistortedHeightmap array for the current chunk
+	/** Generates the m_DistortedHeightmap array for the current chunk. */
 	void GenerateHeightArray(void);
 	
-	/// Calculates the heightmap value (before distortion) at the specified (floating-point) coords
+	/** Calculates the heightmap value (before distortion) at the specified (floating-point) coords. */
 	int GetHeightmapAt(NOISE_DATATYPE a_X, NOISE_DATATYPE a_Z);
 	
-	/// Updates m_DistortAmpX/Z[] based on m_CurChunkX and m_CurChunkZ
+	/** Updates m_DistortAmpX/Z[] based on m_CurChunkX and m_CurChunkZ. */
 	void UpdateDistortAmps(void);
 	
-	/// Calculates the X and Z distortion amplitudes based on the neighbors' biomes
+	/** Calculates the X and Z distortion amplitudes based on the neighbors' biomes. */
 	void GetDistortAmpsAt(BiomeNeighbors & a_Neighbors, int a_RelX, int a_RelZ, NOISE_DATATYPE & a_DistortAmpX, NOISE_DATATYPE & a_DistortAmpZ);
 	
-	/// Reads the settings from the ini file. Skips reading if already initialized
+	/** Reads the settings from the ini file. Skips reading if already initialized. */
 	void Initialize(cIniFile & a_IniFile);
 	
-	/// Composes a single column in a_ChunkDesc. Chooses what to do based on the biome in that column
-	void ComposeColumn(cChunkDesc & a_ChunkDesc, int a_RelX, int a_RelZ);
 	
-	/// Fills the specified column with the specified pattern; restarts the pattern when air is reached,
-	/// switches to ocean floor pattern if ocean is reached. Always adds bedrock at the very bottom.
-	void FillColumnPattern(cChunkDesc & a_ChunkDesc, int a_RelX, int a_RelZ, const sBlockInfo * a_Pattern);
-	
-	/// Fills the specified column with mesa pattern, based on the column height
-	void FillColumnMesa(cChunkDesc & a_ChunkDesc, int a_RelX, int a_RelZ);
-	
-	/// Returns the pattern to use for an ocean floor in the specified column
-	const sBlockInfo * ChooseOceanFloorPattern(int a_RelX, int a_RelZ);
-	
-	
-	// cTerrainHeightGen overrides:
-	virtual void GenHeightMap(int a_ChunkX, int a_ChunkZ, cChunkDef::HeightMap & a_HeightMap) override;
-	virtual void InitializeHeightGen(cIniFile & a_IniFile) override;
-
-	// cTerrainCompositionGen overrides:
-	virtual void ComposeTerrain(cChunkDesc & a_ChunkDesc) override;
-	virtual void InitializeCompoGen(cIniFile & a_IniFile) override;
+	// cTerrainShapeGen overrides:
+	virtual void GenShape(int a_ChunkX, int a_ChunkZ, cChunkDesc::Shape & a_Shape) override;
+	virtual void InitializeShapeGen(cIniFile & a_IniFile) override;
 } ;
diff --git a/src/Generating/DungeonRoomsFinisher.cpp b/src/Generating/DungeonRoomsFinisher.cpp
index 3f328868d..c4bf8839e 100644
--- a/src/Generating/DungeonRoomsFinisher.cpp
+++ b/src/Generating/DungeonRoomsFinisher.cpp
@@ -7,6 +7,7 @@
 #include "DungeonRoomsFinisher.h"
 #include "../FastRandom.h"
 #include "../BlockEntities/ChestEntity.h"
+#include "../BlockEntities/MobSpawnerEntity.h"
 
 
 
@@ -57,6 +58,22 @@ public:
 		int SecondChestPos = (FirstChestPos + 2 + (rnd % (NumPositions - 3))) % NumPositions;
 		m_Chest1 = DecodeChestCoords(FirstChestPos,  SizeX, SizeZ);
 		m_Chest2 = DecodeChestCoords(SecondChestPos, SizeX, SizeZ);
+
+		// Choose what the mobspawner will spawn.
+		// 25% chance for a spider, 25% for a skeleton and 50% chance to get a zombie spawer.
+		int MobType = (a_Noise.IntNoise3DInt(a_OriginX, m_FloorHeight, a_OriginZ) / 7) % 100;
+		if (MobType <= 25)
+		{
+			m_MonsterType = mtSkeleton;
+		}
+		else if (MobType <= 50)
+		{
+			m_MonsterType = mtSpider;
+		}
+		else
+		{
+			m_MonsterType = mtZombie;
+		}
 	}
 
 protected:
@@ -76,9 +93,12 @@ protected:
 	/** The (absolute) coords of the second chest. The Y coord represents the chest's Meta value (facing). */
 	Vector3i m_Chest2;
 
+	/** The monster type for the mobspawner entity. */
+	eMonsterType m_MonsterType;
 
 
-	/** Decodes the position index along the room walls into a proper 2D position for a chest. */
+	/** Decodes the position index along the room walls into a proper 2D position for a chest.
+	The Y coord of the returned vector specifies the chest's meta value*/
 	Vector3i DecodeChestCoords(int a_PosIdx, int a_SizeX, int a_SizeZ)
 	{
 		if (a_PosIdx < a_SizeX)
@@ -111,8 +131,8 @@ protected:
 	{
 		int BlockX = a_ChunkDesc.GetChunkX() * cChunkDef::Width;
 		int BlockZ = a_ChunkDesc.GetChunkZ() * cChunkDef::Width;
-		int RelStartX = Clamp(a_StartX - BlockX, 0, cChunkDef::Width - 1);
-		int RelStartZ = Clamp(a_StartZ - BlockZ, 0, cChunkDef::Width - 1);
+		int RelStartX = Clamp(a_StartX - BlockX, 0, cChunkDef::Width);
+		int RelStartZ = Clamp(a_StartZ - BlockZ, 0, cChunkDef::Width);
 		int RelEndX   = Clamp(a_EndX - BlockX,   0, cChunkDef::Width);
 		int RelEndZ   = Clamp(a_EndZ - BlockZ,   0, cChunkDef::Width);
 		for (int y = a_StartY; y < a_EndY; y++)
@@ -245,7 +265,9 @@ protected:
 		)
 		{
 			a_ChunkDesc.SetBlockTypeMeta(CenterX, b, CenterZ, E_BLOCK_MOB_SPAWNER, 0);
-			// TODO: Set the spawned mob
+			cMobSpawnerEntity * MobSpawner = static_cast<cMobSpawnerEntity *>(a_ChunkDesc.GetBlockEntity(CenterX, b, CenterZ));
+			ASSERT((MobSpawner != nullptr) && (MobSpawner->GetBlockType() == E_BLOCK_MOB_SPAWNER));
+			MobSpawner->SetEntity(m_MonsterType);
 		}
 	}
 } ;
@@ -258,9 +280,9 @@ protected:
 ////////////////////////////////////////////////////////////////////////////////
 // cDungeonRoomsFinisher:
 
-cDungeonRoomsFinisher::cDungeonRoomsFinisher(cTerrainHeightGenPtr a_HeightGen, int a_Seed, int a_GridSize, int a_MaxSize, int a_MinSize, const AString & a_HeightDistrib) :
+cDungeonRoomsFinisher::cDungeonRoomsFinisher(cTerrainShapeGenPtr a_ShapeGen, int a_Seed, int a_GridSize, int a_MaxSize, int a_MinSize, const AString & a_HeightDistrib) :
 	super(a_Seed + 100, a_GridSize, a_GridSize, a_GridSize, a_GridSize, a_MaxSize, a_MaxSize, 1024),
-	m_HeightGen(a_HeightGen),
+	m_ShapeGen(a_ShapeGen),
 	m_MaxHalfSize((a_MaxSize + 1) / 2),
 	m_MinHalfSize((a_MinSize + 1) / 2),
 	m_HeightProbability(cChunkDef::Height)
@@ -293,13 +315,21 @@ cDungeonRoomsFinisher::cStructurePtr cDungeonRoomsFinisher::CreateStructure(int
 	int ChunkX, ChunkZ;
 	int RelX = a_OriginX, RelY = 0, RelZ = a_OriginZ;
 	cChunkDef::AbsoluteToRelative(RelX, RelY, RelZ, ChunkX, ChunkZ);
-	cChunkDef::HeightMap HeightMap;
-	m_HeightGen->GenHeightMap(ChunkX, ChunkZ, HeightMap);
-	int Height = cChunkDef::GetHeight(HeightMap, RelX, RelZ);  // Max room height at {a_OriginX, a_OriginZ}
-	Height = Clamp(m_HeightProbability.MapValue(rnd % m_HeightProbability.GetSum()), 10, Height - 5);
+	cChunkDesc::Shape shape;
+	m_ShapeGen->GenShape(ChunkX, ChunkZ, shape);
+	int height = 0;
+	int idx = RelX * 256 + RelZ * 16 * 256;
+	for (int y = 6; y < cChunkDef::Height; y++)
+	{
+		if (shape[idx + y] != 0)
+		{
+			continue;
+		}
+		height = Clamp(m_HeightProbability.MapValue(rnd % m_HeightProbability.GetSum()), 10, y - 5);
+	}
 
 	// Create the dungeon room descriptor:
-	return cStructurePtr(new cDungeonRoom(a_GridX, a_GridZ, a_OriginX, a_OriginZ, HalfSizeX, HalfSizeZ, Height, m_Noise));
+	return cStructurePtr(new cDungeonRoom(a_GridX, a_GridZ, a_OriginX, a_OriginZ, HalfSizeX, HalfSizeZ, height, m_Noise));
 }
 
 
diff --git a/src/Generating/DungeonRoomsFinisher.h b/src/Generating/DungeonRoomsFinisher.h
index 09dd0448a..e5828f989 100644
--- a/src/Generating/DungeonRoomsFinisher.h
+++ b/src/Generating/DungeonRoomsFinisher.h
@@ -23,15 +23,15 @@ class cDungeonRoomsFinisher :
 
 public:
 	/** Creates a new dungeon room finisher.
-	a_HeightGen is the underlying height generator, so that the rooms can always be placed under the terrain.
+	a_ShapeGen is the underlying terrain shape generator, so that the rooms can always be placed under the terrain.
 	a_MaxSize and a_MinSize are the maximum and minimum sizes of the room's internal (air) area, in blocks across.
 	a_HeightDistrib is the string defining the height distribution for the rooms (cProbabDistrib format). */
-	cDungeonRoomsFinisher(cTerrainHeightGenPtr a_HeightGen, int a_Seed, int a_GridSize, int a_MaxSize, int a_MinSize, const AString & a_HeightDistrib);
+	cDungeonRoomsFinisher(cTerrainShapeGenPtr a_ShapeGen, int a_Seed, int a_GridSize, int a_MaxSize, int a_MinSize, const AString & a_HeightDistrib);
 
 protected:
 
-	/** The height gen that is used for limiting the rooms' Y coords */
-	cTerrainHeightGenPtr m_HeightGen;
+	/** The shape gen that is used for limiting the rooms' Y coords */
+	cTerrainShapeGenPtr m_ShapeGen;
 
 	/** Maximum half-size (from center to wall) of the dungeon room's inner (air) area. Default is 3 (vanilla). */
 	int m_MaxHalfSize;
diff --git a/src/Generating/EndGen.cpp b/src/Generating/EndGen.cpp
index 0111d2fa3..89d6117bb 100644
--- a/src/Generating/EndGen.cpp
+++ b/src/Generating/EndGen.cpp
@@ -147,13 +147,14 @@ bool cEndGen::IsChunkOutsideRange(int a_ChunkX, int a_ChunkZ)
 
 
 
-void cEndGen::GenHeightMap(int a_ChunkX, int a_ChunkZ, cChunkDef::HeightMap & a_HeightMap)
+void cEndGen::GenShape(int a_ChunkX, int a_ChunkZ, cChunkDesc::Shape & a_Shape)
 {
+	// If the chunk is outside out range, fill the shape with zeroes:
 	if (IsChunkOutsideRange(a_ChunkX, a_ChunkZ))
 	{
-		for (size_t i = 0; i < ARRAYCOUNT(a_HeightMap); i++)
+		for (size_t i = 0; i < ARRAYCOUNT(a_Shape); i++)
 		{
-			a_HeightMap[i] = 0;
+			a_Shape[i] = 0;
 		}
 		return;
 	}
@@ -165,15 +166,14 @@ void cEndGen::GenHeightMap(int a_ChunkX, int a_ChunkZ, cChunkDef::HeightMap & a_
 	{
 		for (int x = 0; x < cChunkDef::Width; x++)
 		{
-			cChunkDef::SetHeight(a_HeightMap, x, z, MaxY);
-			for (int y = MaxY; y > 0; y--)
+			for (int y = 0; y < MaxY; y++)
 			{
-				if (m_NoiseArray[y * 17 * 17 + z * 17 + x] <= 0)
-				{
-					cChunkDef::SetHeight(a_HeightMap, x, z, y);
-					break;
-				}
-			}  // for y
+				a_Shape[(x + 16 * z) * 256 + y] = (m_NoiseArray[y * 17 * 17 + z * 17 + z] > 0) ? 1 : 0;
+			}
+			for (int y = MaxY; y < cChunkDef::Height; y++)
+			{
+				a_Shape[(x + 16 * z) * 256 + y] = 0;
+			}
 		}  // for x
 	}  // for z
 }
@@ -182,30 +182,18 @@ void cEndGen::GenHeightMap(int a_ChunkX, int a_ChunkZ, cChunkDef::HeightMap & a_
 
 
 
-void cEndGen::ComposeTerrain(cChunkDesc & a_ChunkDesc)
+void cEndGen::ComposeTerrain(cChunkDesc & a_ChunkDesc, const cChunkDesc::Shape & a_Shape)
 {
-	if (IsChunkOutsideRange(a_ChunkDesc.GetChunkX(), a_ChunkDesc.GetChunkZ()))
-	{
-		a_ChunkDesc.FillBlocks(E_BLOCK_AIR, 0);
-		return;
-	}
-
-	PrepareState(a_ChunkDesc.GetChunkX(), a_ChunkDesc.GetChunkZ());
-
-	int MaxY = std::min((int)(1.75 * m_IslandSizeY + 1), cChunkDef::Height - 1);
+	a_ChunkDesc.FillBlocks(E_BLOCK_AIR, 0);
 	for (int z = 0; z < cChunkDef::Width; z++)
 	{
 		for (int x = 0; x < cChunkDef::Width; x++)
 		{
-			for (int y = MaxY; y > 0; y--)
+			for (int y = 0; y < cChunkDef::Height; y++)
 			{
-				if (m_NoiseArray[y * 17 * 17 + z * 17 + x] <= 0)
-				{
-					a_ChunkDesc.SetBlockTypeMeta(x, y, z, E_BLOCK_END_STONE, 0);
-				}
-				else
+				if (a_Shape[(x + 16 * z) * 256 + y] != 0)
 				{
-					a_ChunkDesc.SetBlockTypeMeta(x, y, z, E_BLOCK_AIR, 0);
+					a_ChunkDesc.SetBlockType(x, y, z, E_BLOCK_END_STONE);
 				}
 			}  // for y
 		}  // for x
diff --git a/src/Generating/EndGen.h b/src/Generating/EndGen.h
index 322061810..f9e3f6e53 100644
--- a/src/Generating/EndGen.h
+++ b/src/Generating/EndGen.h
@@ -10,14 +10,14 @@
 #pragma once
 
 #include "ComposableGenerator.h"
-#include "../Noise.h"
+#include "../Noise/Noise.h"
 
 
 
 
 
 class cEndGen :
-	public cTerrainHeightGen,
+	public cTerrainShapeGen,
 	public cTerrainCompositionGen
 {
 public:
@@ -59,10 +59,10 @@ protected:
 	/// Returns true if the chunk is outside of the island's dimensions
 	bool IsChunkOutsideRange(int a_ChunkX, int a_ChunkZ);
 		
-	// cTerrainHeightGen overrides:
-	virtual void GenHeightMap(int a_ChunkX, int a_ChunkZ, cChunkDef::HeightMap & a_HeightMap) override;
+	// cTerrainShapeGen overrides:
+	virtual void GenShape(int a_ChunkX, int a_ChunkZ, cChunkDesc::Shape & a_Shape) override;
 
 	// cTerrainCompositionGen overrides:
-	virtual void ComposeTerrain(cChunkDesc & a_ChunkDesc) override;
+	virtual void ComposeTerrain(cChunkDesc & a_ChunkDesc, const cChunkDesc::Shape & a_Shape) override;
 	virtual void InitializeCompoGen(cIniFile & a_IniFile) override;
 } ;
diff --git a/src/Generating/FinishGen.cpp b/src/Generating/FinishGen.cpp
index 0564789dc..e10cb00f8 100644
--- a/src/Generating/FinishGen.cpp
+++ b/src/Generating/FinishGen.cpp
@@ -10,7 +10,6 @@
 #include "Globals.h"
 
 #include "FinishGen.h"
-#include "../Noise.h"
 #include "../BlockID.h"
 #include "../Simulator/FluidSimulator.h"  // for cFluidSimulator::CanWashAway()
 #include "../Simulator/FireSimulator.h"
@@ -27,6 +26,8 @@
 #define DEF_OVERWORLD_LAVA_SPRINGS  "0, 0; 10, 5; 11, 45; 48, 2; 64, 1; 255, 0"
 #define DEF_END_WATER_SPRINGS       "0, 1; 255, 1"
 #define DEF_END_LAVA_SPRINGS        "0, 1; 255, 1"
+#define DEF_ANIMAL_SPAWN_PERCENT    10
+#define DEF_NO_ANIMALS              0
 
 
 
@@ -66,7 +67,7 @@ void cFinishGenNetherClumpFoliage::GenFinish(cChunkDesc & a_ChunkDesc)
 		{
 			continue;
 		}
-		
+
 		// Choose what block to use.
 		NOISE_DATATYPE BlockType = m_Noise.IntNoise3D((int) ChunkX, y, (int) ChunkZ);
 		if (BlockType < -0.7)
@@ -196,10 +197,15 @@ void cFinishGenTallGrass::GenFinish(cChunkDesc & a_ChunkDesc)
 			{
 				continue;
 			}
-			
+
 			// Get the top block + 1. This is the place where the grass would finaly be placed:
 			int y = a_ChunkDesc.GetHeight(x, z) + 1;
 
+			if (y >= 255)
+			{
+				continue;
+			}
+
 			// Check if long grass can be placed:
 			if (
 				(a_ChunkDesc.GetBlockType(x, y, z) != E_BLOCK_AIR) ||
@@ -277,7 +283,7 @@ bool cFinishGenSprinkleFoliage::TryAddSugarcane(cChunkDesc & a_ChunkDesc, int a_
 	{
 		return false;
 	}
-	
+
 	// All conditions met, place a sugarcane here:
 	a_ChunkDesc.SetBlockType(a_RelX, a_RelY + 1, a_RelZ, E_BLOCK_SUGARCANE);
 	return true;
@@ -290,7 +296,7 @@ bool cFinishGenSprinkleFoliage::TryAddSugarcane(cChunkDesc & a_ChunkDesc, int a_
 void cFinishGenSprinkleFoliage::GenFinish(cChunkDesc & a_ChunkDesc)
 {
 	// Generate small foliage (1-block):
-	
+
 	// TODO: Update heightmap with 1-block-tall foliage
 	for (int z = 0; z < cChunkDef::Width; z++)
 	{
@@ -315,7 +321,7 @@ void cFinishGenSprinkleFoliage::GenFinish(cChunkDesc & a_ChunkDesc)
 				// WEIRD, since we're using heightmap, so there should NOT be anything above it
 				continue;
 			}
-			
+
 			const float xx = (float)BlockX;
 			float val1 = m_Noise.CubicNoise2D(xx * 0.1f,  zz * 0.1f);
 			float val2 = m_Noise.CubicNoise2D(xx * 0.01f, zz * 0.01f);
@@ -355,7 +361,7 @@ void cFinishGenSprinkleFoliage::GenFinish(cChunkDesc & a_ChunkDesc)
 					}
 					break;
 				}  // case E_BLOCK_GRASS
-				
+
 				case E_BLOCK_SAND:
 				{
 					int y = Top + 1;
@@ -366,7 +372,8 @@ void cFinishGenSprinkleFoliage::GenFinish(cChunkDesc & a_ChunkDesc)
 						(a_ChunkDesc.GetBlockType(x + 1, y, z)     == E_BLOCK_AIR) &&
 						(a_ChunkDesc.GetBlockType(x - 1, y, z)     == E_BLOCK_AIR) &&
 						(a_ChunkDesc.GetBlockType(x,     y, z + 1) == E_BLOCK_AIR) &&
-						(a_ChunkDesc.GetBlockType(x,     y, z - 1) == E_BLOCK_AIR)
+						(a_ChunkDesc.GetBlockType(x,     y, z - 1) == E_BLOCK_AIR) &&
+						IsDesertVariant(a_ChunkDesc.GetBiome(x, z))
 					)
 					{
 						a_ChunkDesc.SetBlockType(x, ++Top, z, E_BLOCK_CACTUS);
@@ -387,6 +394,72 @@ void cFinishGenSprinkleFoliage::GenFinish(cChunkDesc & a_ChunkDesc)
 
 
 
+bool cFinishGenSprinkleFoliage::IsDesertVariant(EMCSBiome a_Biome)
+{
+	return
+	(
+		(a_Biome == biDesertHills) ||
+		(a_Biome == biDesert) ||
+		(a_Biome == biDesertM)
+	);
+}
+
+
+
+
+
+////////////////////////////////////////////////////////////////////////////////
+// cFinishGenSoulsandRims
+
+void cFinishGenSoulsandRims::GenFinish(cChunkDesc & a_ChunkDesc)
+{
+	int ChunkX = a_ChunkDesc.GetChunkX() * cChunkDef::Width;
+	int ChunkZ = a_ChunkDesc.GetChunkZ() * cChunkDef::Width;
+	HEIGHTTYPE MaxHeight = a_ChunkDesc.GetMaxHeight();
+
+	for (int x = 0; x < 16; x++)
+	{
+		int xx = ChunkX + x;
+		for (int z = 0; z < 16; z++)
+		{
+			int zz = ChunkZ + z;
+
+			// Place soulsand rims when netherrack gets thin
+			for (int y = 2; y < MaxHeight - 2; y++)
+			{
+				// The current block is air. Let's bail ut.
+				BLOCKTYPE Block = a_ChunkDesc.GetBlockType(x, y, z);
+				if (Block == E_BLOCK_AIR)
+				{
+					continue;
+				}
+
+				if (
+					((a_ChunkDesc.GetBlockType(x, y + 1, z) != E_BLOCK_AIR) &&
+					( a_ChunkDesc.GetBlockType(x, y + 2, z) != E_BLOCK_AIR)) ||
+					((a_ChunkDesc.GetBlockType(x, y - 1, z) != E_BLOCK_AIR) &&
+					( a_ChunkDesc.GetBlockType(x, y - 2, z) != E_BLOCK_AIR))
+				)
+				{
+					continue;
+				}
+
+				NOISE_DATATYPE NoiseX = ((NOISE_DATATYPE)(xx)) / 32;
+				NOISE_DATATYPE NoiseY = ((NOISE_DATATYPE)(zz)) / 32;
+				NOISE_DATATYPE CompBlock = m_Noise.CubicNoise3D(NoiseX, (float) (y) / 4, NoiseY);
+				if (CompBlock < 0)
+				{
+					a_ChunkDesc.SetBlockType(x, y, z, E_BLOCK_SOULSAND);
+				}
+			}
+		}
+	}
+}
+
+
+
+
+
 ////////////////////////////////////////////////////////////////////////////////
 // cFinishGenSnow:
 
@@ -407,13 +480,18 @@ void cFinishGenSnow::GenFinish(cChunkDesc & a_ChunkDesc)
 				case biFrozenOcean:
 				{
 					int Height = a_ChunkDesc.GetHeight(x, z);
-					if (cBlockInfo::IsSnowable(a_ChunkDesc.GetBlockType(x, Height, z)))
+					if (cBlockInfo::IsSnowable(a_ChunkDesc.GetBlockType(x, Height, z)) && (Height < cChunkDef::Height - 1))
 					{
 						a_ChunkDesc.SetBlockType(x, Height + 1, z, E_BLOCK_SNOW);
 						a_ChunkDesc.SetHeight(x, z, Height + 1);
 					}
 					break;
 				}
+				default:
+				{
+					// There's no snow in the other biomes.
+					break;
+				}
 			}
 		}
 	}  // for z
@@ -454,6 +532,11 @@ void cFinishGenIce::GenFinish(cChunkDesc & a_ChunkDesc)
 					}
 					break;
 				}
+				default:
+				{
+					// No icy water in other biomes.
+					break;
+				}
 			}
 		}
 	}  // for z
@@ -502,7 +585,7 @@ void cFinishGenSingleTopBlock::GenFinish(cChunkDesc & a_ChunkDesc)
 		}
 
 		int Height = a_ChunkDesc.GetHeight(x, z);
-		if (Height >= cChunkDef::Height)
+		if (Height >= cChunkDef::Height - 1)
 		{
 			// Too high up
 			continue;
@@ -702,7 +785,7 @@ void cFinishGenPreSimulator::StationarizeFluid(
 			}  // for y
 		}  // for x
 	}  // for z
-	
+
 	// Turn fluid at the chunk edges into non-stationary fluid:
 	for (int y = 0; y < cChunkDef::Height; y++)
 	{
@@ -794,12 +877,12 @@ void cFinishGenFluidSprings::GenFinish(cChunkDesc & a_ChunkDesc)
 		// Not in this chunk
 		return;
 	}
-	
+
 	// Get the height at which to try:
 	int Height = m_Noise.IntNoise3DInt(128 * a_ChunkDesc.GetChunkX(), 1024, 256 * a_ChunkDesc.GetChunkZ()) / 11;
 	Height %= m_HeightDistribution.GetSum();
 	Height = m_HeightDistribution.MapValue(Height);
-	
+
 	// Try adding the spring at the height, if unsuccessful, move lower:
 	for (int y = Height; y > 1; y--)
 	{
@@ -837,7 +920,7 @@ bool cFinishGenFluidSprings::TryPlaceSpring(cChunkDesc & a_ChunkDesc, int x, int
 	{
 		return false;
 	}
-	
+
 	static const struct
 	{
 		int x, y, z;
@@ -868,7 +951,7 @@ bool cFinishGenFluidSprings::TryPlaceSpring(cChunkDesc & a_ChunkDesc, int x, int
 	{
 		return false;
 	}
-	
+
 	// Has exactly one air neighbor, place a spring:
 	a_ChunkDesc.SetBlockTypeMeta(x, y, z, m_Fluid, 0);
 	return true;
@@ -877,3 +960,236 @@ bool cFinishGenFluidSprings::TryPlaceSpring(cChunkDesc & a_ChunkDesc, int x, int
 
 
 
+
+////////////////////////////////////////////////////////////////////////////////
+// cFinishGenPassiveMobs:
+
+cFinishGenPassiveMobs::cFinishGenPassiveMobs(int a_Seed, cIniFile & a_IniFile, eDimension a_Dimension) :
+	m_Noise(a_Seed)
+{
+	AString SectionName = "Animals";
+	int DefaultAnimalSpawnChunkPercentage = DEF_ANIMAL_SPAWN_PERCENT;
+	switch (a_Dimension)
+	{
+		case dimOverworld:
+		{
+			DefaultAnimalSpawnChunkPercentage = DEF_ANIMAL_SPAWN_PERCENT;
+			break;
+		}
+		case dimNether:
+		case dimEnd:  // No nether or end animals (currently)
+		{
+			DefaultAnimalSpawnChunkPercentage = DEF_NO_ANIMALS;
+			break;
+		}
+		default:
+		{
+			ASSERT(!"Unhandled world dimension");
+			DefaultAnimalSpawnChunkPercentage = DEF_NO_ANIMALS;
+			break;
+		}
+	}  // switch (dimension)
+	m_AnimalProbability = a_IniFile.GetValueSetI(SectionName, "AnimalSpawnChunkPercentage", DefaultAnimalSpawnChunkPercentage);
+	if ((m_AnimalProbability < 0) || (m_AnimalProbability > 100))
+	{
+		LOGWARNING("[Animals]: AnimalSpawnChunkPercentage is invalid, using the default of \"%d\".", DefaultAnimalSpawnChunkPercentage);
+		m_AnimalProbability = DefaultAnimalSpawnChunkPercentage;
+	}
+}
+
+
+
+
+
+void cFinishGenPassiveMobs::GenFinish(cChunkDesc & a_ChunkDesc)
+{
+	int chunkX = a_ChunkDesc.GetChunkX();
+	int chunkZ = a_ChunkDesc.GetChunkZ();
+	int ChanceRnd = (m_Noise.IntNoise2DInt(chunkX, chunkZ) / 7) % 100;
+	if (ChanceRnd > m_AnimalProbability)
+	{
+		return;
+	}
+
+	eMonsterType RandomMob = GetRandomMob(a_ChunkDesc);
+	if (RandomMob == mtInvalidType)
+	{
+		// No mobs here. Don't send an error, because if the biome was a desert it would return mtInvalidType as well.
+		return;
+	}
+
+	// Try spawning a pack center 10 times, should get roughly the same probability
+	for (int Tries = 0; Tries < 10; Tries++)
+	{
+		int PackCenterX = (m_Noise.IntNoise2DInt(chunkX + chunkZ, Tries) / 7) % cChunkDef::Width;
+		int PackCenterZ = (m_Noise.IntNoise2DInt(chunkX, chunkZ + Tries) / 7) % cChunkDef::Width;
+		if (TrySpawnAnimals(a_ChunkDesc, PackCenterX, a_ChunkDesc.GetHeight(PackCenterX, PackCenterZ), PackCenterZ, RandomMob))
+		{
+			for (int i = 0; i < 3; i++)
+			{
+				int OffsetX = (m_Noise.IntNoise2DInt(chunkX + chunkZ + i, Tries) / 7) % cChunkDef::Width;
+				int OffsetZ = (m_Noise.IntNoise2DInt(chunkX, chunkZ + Tries + i) / 7) % cChunkDef::Width;
+				TrySpawnAnimals(a_ChunkDesc, OffsetX, a_ChunkDesc.GetHeight(OffsetX, OffsetZ), OffsetZ, RandomMob);
+			}
+			return;
+
+		}  // if pack center spawn successful
+	}  // for tries
+}
+
+
+
+
+
+bool cFinishGenPassiveMobs::TrySpawnAnimals(cChunkDesc & a_ChunkDesc, int a_RelX, int a_RelY, int a_RelZ, eMonsterType AnimalToSpawn)
+{
+	if ((a_RelY >= cChunkDef::Height - 1) || (a_RelY <= 0))
+	{
+		return false;
+	}
+
+	BLOCKTYPE BlockAtHead    = a_ChunkDesc.GetBlockType(a_RelX, a_RelY + 1, a_RelZ);
+	BLOCKTYPE BlockAtFeet    = a_ChunkDesc.GetBlockType(a_RelX, a_RelY, a_RelZ);
+	BLOCKTYPE BlockUnderFeet = a_ChunkDesc.GetBlockType(a_RelX, a_RelY - 1, a_RelZ);
+
+	// Check block below (opaque, grass, water), and above (air)
+	if ((AnimalToSpawn == mtSquid) && (BlockAtFeet != E_BLOCK_WATER))
+	{
+		return false;
+	}
+	if (
+		(AnimalToSpawn != mtSquid) &&
+		(BlockAtHead != E_BLOCK_AIR) &&
+		(BlockAtFeet != E_BLOCK_AIR) &&
+		(!cBlockInfo::IsTransparent(BlockUnderFeet))
+	)
+	{
+		return false;
+	}
+	if (
+		(BlockUnderFeet != E_BLOCK_GRASS) &&
+		((AnimalToSpawn == mtSheep) || (AnimalToSpawn == mtChicken) || (AnimalToSpawn == mtPig))
+	)
+	{
+		return false;
+	}
+	if ((AnimalToSpawn == mtMooshroom) && (BlockUnderFeet != E_BLOCK_MYCELIUM))
+	{
+		return false;
+	}
+
+	double AnimalX = static_cast<double>(a_ChunkDesc.GetChunkX() * cChunkDef::Width + a_RelX + 0.5);
+	double AnimalY = a_RelY;
+	double AnimalZ = static_cast<double>(a_ChunkDesc.GetChunkZ() * cChunkDef::Width + a_RelZ + 0.5);
+
+	cMonster * NewMob = cMonster::NewMonsterFromType(AnimalToSpawn);
+	NewMob->SetPosition(AnimalX, AnimalY, AnimalZ);
+	a_ChunkDesc.GetEntities().push_back(NewMob);
+	LOGD("Spawning %s #%i at {%.02f, %.02f, %.02f}", NewMob->GetClass(), NewMob->GetUniqueID(), AnimalX, AnimalY, AnimalZ);
+
+	return true;
+}
+
+
+
+
+
+eMonsterType cFinishGenPassiveMobs::GetRandomMob(cChunkDesc & a_ChunkDesc)
+{
+
+	std::set<eMonsterType> ListOfSpawnables;
+	int chunkX = a_ChunkDesc.GetChunkX();
+	int chunkZ = a_ChunkDesc.GetChunkZ();
+	int x = (m_Noise.IntNoise2DInt(chunkX, chunkZ + 10) / 7) % cChunkDef::Width;
+	int z = (m_Noise.IntNoise2DInt(chunkX + chunkZ, chunkZ) / 7) % cChunkDef::Width;
+
+	// Check biomes first to get a list of animals
+	switch (a_ChunkDesc.GetBiome(x, z))
+	{
+		// No animals in deserts or non-overworld dimensions
+		case biNether:
+		case biEnd:
+		case biDesertHills:
+		case biDesert:
+		case biDesertM:
+		{
+			return mtInvalidType;
+		}
+
+		// Mooshroom only - no other mobs on mushroom islands
+		case biMushroomIsland:
+		case biMushroomShore:
+		{
+			return mtMooshroom;
+		}
+
+		// Add squid in ocean biomes
+		case biOcean:
+		case biFrozenOcean:
+		case biFrozenRiver:
+		case biRiver:
+		case biDeepOcean:
+		{
+			ListOfSpawnables.insert(mtSquid);
+			break;
+		}
+
+		// Add ocelots in jungle biomes
+		case biJungle:
+		case biJungleHills:
+		case biJungleEdge:
+		case biJungleM:
+		case biJungleEdgeM:
+		{
+			ListOfSpawnables.insert(mtOcelot);
+			break;
+		}
+
+		// Add horses in plains-like biomes
+		case biPlains:
+		case biSunflowerPlains:
+		case biSavanna:
+		case biSavannaPlateau:
+		case biSavannaM:
+		case biSavannaPlateauM:
+		{
+			ListOfSpawnables.insert(mtHorse);
+			break;
+		}
+
+		// Add wolves in forest and spruce forests
+		case biForest:
+		case biTaiga:
+		case biMegaTaiga:
+		case biColdTaiga:
+		case biColdTaigaM:
+		{
+			ListOfSpawnables.insert(mtWolf);
+			break;
+		}
+		// Nothing special about this biome
+		default:
+		{
+			break;
+		}
+	}
+	ListOfSpawnables.insert(mtChicken);
+	ListOfSpawnables.insert(mtCow);
+	ListOfSpawnables.insert(mtPig);
+	ListOfSpawnables.insert(mtSheep);
+
+	if (ListOfSpawnables.empty())
+	{
+		return mtInvalidType;
+	}
+
+	int RandMob = (m_Noise.IntNoise2DInt(chunkX - chunkZ + 2, chunkX + 5) / 7) % ListOfSpawnables.size();
+	auto MobIter = ListOfSpawnables.begin();
+	std::advance(MobIter, RandMob);
+
+	return *MobIter;
+}
+
+
+
+
diff --git a/src/Generating/FinishGen.h b/src/Generating/FinishGen.h
index 4a08d70c8..ae6dee590 100644
--- a/src/Generating/FinishGen.h
+++ b/src/Generating/FinishGen.h
@@ -16,8 +16,9 @@
 
 
 #include "ComposableGenerator.h"
-#include "../Noise.h"
+#include "../Noise/Noise.h"
 #include "../ProbabDistrib.h"
+#include "../Mobs/Monster.h"
 
 
 
@@ -117,19 +118,41 @@ protected:
 
 
 
+class cFinishGenSoulsandRims :
+	public cFinishGen
+{
+public:
+	cFinishGenSoulsandRims(int a_Seed) :
+		m_Noise(a_Seed)
+	{
+	}
+
+protected:
+	cNoise m_Noise;
+
+	virtual void GenFinish(cChunkDesc & a_ChunkDesc) override;
+} ;
+
+
+
+
+
 class cFinishGenSprinkleFoliage :
 	public cFinishGen
 {
 public:
 	cFinishGenSprinkleFoliage(int a_Seed) : m_Noise(a_Seed), m_Seed(a_Seed) {}
-	
+
 protected:
 	cNoise m_Noise;
 	int    m_Seed;
-	
+
 	/// Tries to place sugarcane at the coords specified, returns true if successful
 	bool TryAddSugarcane(cChunkDesc & a_ChunkDesc, int a_RelX, int a_RelY, int a_RelZ);
-	
+
+	// Returns true is the specified biome is a desert or its variant
+	static bool IsDesertVariant(EMCSBiome a_biome);
+
 	// cFinishGen override:
 	virtual void GenFinish(cChunkDesc & a_ChunkDesc) override;
 } ;
@@ -167,31 +190,31 @@ public:
 		{
 			m_IsAllowedBelow[idx] = false;
 		}
-		
+
 		// Load the allowed blocks into m_IsAllowedBelow
 		for (BlockList::iterator itr = a_AllowedBelow.begin(); itr != a_AllowedBelow.end(); ++itr)
 		{
 			m_IsAllowedBelow[*itr] = true;
 		}
-		
+
 		// Initialize all the biome types.
 		for (size_t idx = 0; idx < ARRAYCOUNT(m_IsBiomeAllowed); ++idx)
 		{
 			m_IsBiomeAllowed[idx] = false;
 		}
-		
+
 		// Load the allowed biomes into m_IsBiomeAllowed
 		for (BiomeList::iterator itr = a_Biomes.begin(); itr != a_Biomes.end(); ++itr)
 		{
 			m_IsBiomeAllowed[*itr] = true;
 		}
 	}
-	
+
 protected:
 	cNoise m_Noise;
 	BLOCKTYPE m_BlockType;
 	int       m_Amount;         ///< Relative amount of blocks to try adding. 1 = one block per 256 biome columns.
-	
+
 	int GetNumToGen(const cChunkDef::BiomeMap & a_BiomeMap);
 
 	// Returns true if the given biome is a biome that is allowed.
@@ -206,7 +229,7 @@ protected:
 		return m_IsAllowedBelow[a_BlockBelow];
 	}
 
-	
+
 	// cFinishGen override:
 	virtual void GenFinish(cChunkDesc & a_ChunkDesc) override;
 } ;
@@ -223,11 +246,11 @@ public:
 		m_Level(a_Level)
 	{
 	}
-	
+
 	int GetLevel(void) const { return m_Level; }
 protected:
 	int m_Level;
-	
+
 	// cFinishGen override:
 	virtual void GenFinish(cChunkDesc & a_ChunkDesc) override;
 } ;
@@ -241,7 +264,7 @@ class cFinishGenPreSimulator :
 {
 public:
 	cFinishGenPreSimulator(bool a_PreSimulateFallingBlocks, bool a_PreSimulateWater, bool a_PreSimulateLava);
-	
+
 protected:
 
 	bool m_PreSimulateFallingBlocks;
@@ -253,7 +276,7 @@ protected:
 		cChunkDef::BlockTypes & a_BlockTypes,    // Block types to read and change
 		cChunkDef::HeightMap & a_HeightMap       // Height map to update by the current data
 	);
-	
+
 	/** For each fluid block:
 	- if all surroundings are of the same fluid, makes it stationary; otherwise makes it flowing (excl. top)
 	- all fluid on the chunk's edge is made flowing
@@ -278,7 +301,7 @@ class cFinishGenFluidSprings :
 {
 public:
 	cFinishGenFluidSprings(int a_Seed, BLOCKTYPE a_Fluid, cIniFile & a_IniFile, eDimension a_Dimension);
-	
+
 protected:
 
 	cNoise         m_Noise;
@@ -289,10 +312,43 @@ protected:
 	// cFinishGen override:
 	virtual void GenFinish(cChunkDesc & a_ChunkDesc) override;
 
-	/// Tries to place a spring at the specified coords, checks neighbors. Returns true if successful
+	/** Tries to place a spring at the specified coords, checks neighbors. Returns true if successful. */
 	bool TryPlaceSpring(cChunkDesc & a_ChunkDesc, int x, int y, int z);
 } ;
 
 
 
 
+
+/** This class populates generated chunks with packs of biome-dependant animals
+Animals: cows, sheep, pigs, mooshrooms, squid, horses, wolves, ocelots */
+class cFinishGenPassiveMobs :
+	public cFinishGen
+{
+public:
+	
+	cFinishGenPassiveMobs(int a_Seed, cIniFile & a_IniFile, eDimension a_Dimension);
+
+protected:
+
+	/** The noise used as the source of randomness */
+	cNoise m_Noise;
+
+	/** Chance, [0..100], that an animal pack will be generated in a chunk */
+	int m_AnimalProbability;
+
+
+	// cFinishGen override:
+	virtual void GenFinish(cChunkDesc & a_ChunkDesc) override;
+
+	/** Returns false if an animal cannot spawn at given coords, else adds it to the chunk's entity list and returns true */
+	bool TrySpawnAnimals(cChunkDesc & a_ChunkDesc, int x, int y, int z, eMonsterType AnimalToSpawn);
+
+	/** Picks a random animal from biome-dependant list for a random position in the chunk.
+	Returns the chosen mob type, or mtInvalid if no mob chosen. */
+	eMonsterType GetRandomMob(cChunkDesc & a_ChunkDesc);
+} ;
+
+
+
+
diff --git a/src/Generating/GridStructGen.h b/src/Generating/GridStructGen.h
index 03131fce9..b92fb2e9d 100644
--- a/src/Generating/GridStructGen.h
+++ b/src/Generating/GridStructGen.h
@@ -10,7 +10,7 @@
 #pragma once
 
 #include "ComposableGenerator.h"
-#include "../Noise.h"
+#include "../Noise/Noise.h"
 
 
 
diff --git a/src/Generating/HeiGen.cpp b/src/Generating/HeiGen.cpp
index a0b8770f5..61d087c17 100644
--- a/src/Generating/HeiGen.cpp
+++ b/src/Generating/HeiGen.cpp
@@ -15,82 +15,6 @@
 
 
 
-
-////////////////////////////////////////////////////////////////////////////////
-// cTerrainHeightGen:
-
-cTerrainHeightGenPtr cTerrainHeightGen::CreateHeightGen(cIniFile & a_IniFile, cBiomeGenPtr a_BiomeGen, int a_Seed, bool & a_CacheOffByDefault)
-{
-	AString HeightGenName = a_IniFile.GetValueSet("Generator", "HeightGen", "");
-	if (HeightGenName.empty())
-	{
-		LOGWARN("[Generator] HeightGen value not set in world.ini, using \"Biomal\".");
-		HeightGenName = "Biomal";
-	}
-	
-	a_CacheOffByDefault = false;
-	cTerrainHeightGen * res = nullptr;
-	if (NoCaseCompare(HeightGenName, "flat") == 0)
-	{
-		res = new cHeiGenFlat;
-		a_CacheOffByDefault = true;  // We're generating faster than a cache would retrieve data
-	}
-	else if (NoCaseCompare(HeightGenName, "classic") == 0)
-	{
-		res = new cHeiGenClassic(a_Seed);
-	}
-	else if (NoCaseCompare(HeightGenName, "DistortedHeightmap") == 0)
-	{
-		res = new cDistortedHeightmap(a_Seed, a_BiomeGen);
-	}
-	else if (NoCaseCompare(HeightGenName, "End") == 0)
-	{
-		res = new cEndGen(a_Seed);
-	}
-	else if (NoCaseCompare(HeightGenName, "Mountains") == 0)
-	{
-		res = new cHeiGenMountains(a_Seed);
-	}
-	else if (NoCaseCompare(HeightGenName, "Noise3D") == 0)
-	{
-		res = new cNoise3DComposable(a_Seed);
-	}
-	else if (NoCaseCompare(HeightGenName, "biomal") == 0)
-	{
-		res = new cHeiGenBiomal(a_Seed, a_BiomeGen);
-
-		/*
-		// Performance-testing:
-		LOGINFO("Measuring performance of cHeiGenBiomal...");
-		clock_t BeginTick = clock();
-		for (int x = 0; x < 500; x++)
-		{
-			cChunkDef::HeightMap Heights;
-			res->GenHeightMap(x * 5, x * 5, Heights);
-		}
-		clock_t Duration = clock() - BeginTick;
-		LOGINFO("HeightGen for 500 chunks took %d ticks (%.02f sec)", Duration, (double)Duration / CLOCKS_PER_SEC);
-		//*/
-	}
-	else
-	{
-		// No match found, force-set the default and retry
-		LOGWARN("Unknown HeightGen \"%s\", using \"Biomal\" instead.", HeightGenName.c_str());
-		a_IniFile.DeleteValue("Generator", "HeightGen");
-		a_IniFile.SetValue("Generator", "HeightGen", "Biomal");
-		return CreateHeightGen(a_IniFile, a_BiomeGen, a_Seed, a_CacheOffByDefault);
-	}
-	
-	// Read the settings:
-	res->InitializeHeightGen(a_IniFile);
-	
-	return cTerrainHeightGenPtr(res);
-}
-
-
-
-
-
 ////////////////////////////////////////////////////////////////////////////////
 // cHeiGenFlat:
 
@@ -208,15 +132,6 @@ void cHeiGenCache::GenHeightMap(int a_ChunkX, int a_ChunkZ, cChunkDef::HeightMap
 
 
 
-void cHeiGenCache::InitializeHeightGen(cIniFile & a_IniFile)
-{
-	m_HeiGenToCache->InitializeHeightGen(a_IniFile);
-}
-
-
-
-
-
 bool cHeiGenCache::GetHeightAt(int a_ChunkX, int a_ChunkZ, int a_RelX, int a_RelZ, HEIGHTTYPE & a_Height)
 {
 	for (int i = 0; i < m_CacheSize; i++)
@@ -235,6 +150,51 @@ bool cHeiGenCache::GetHeightAt(int a_ChunkX, int a_ChunkZ, int a_RelX, int a_Rel
 
 
 ////////////////////////////////////////////////////////////////////////////////
+// cHeiGenMultiCache:
+
+cHeiGenMultiCache::cHeiGenMultiCache(cTerrainHeightGenPtr a_HeiGenToCache, size_t a_SubCacheSize, size_t a_NumSubCaches):
+	m_NumSubCaches(a_NumSubCaches)
+{
+	// Create the individual sub-caches:
+	m_SubCaches.reserve(a_NumSubCaches);
+	for (size_t i = 0; i < a_NumSubCaches; i++)
+	{
+		m_SubCaches.push_back(std::make_shared<cHeiGenCache>(a_HeiGenToCache, a_SubCacheSize));
+	}
+}
+
+
+
+
+
+void cHeiGenMultiCache::GenHeightMap(int a_ChunkX, int a_ChunkZ, cChunkDef::HeightMap & a_HeightMap)
+{
+	// Get the subcache responsible for this chunk:
+	const size_t cacheIdx = ((size_t)a_ChunkX + m_CoeffZ * (size_t)a_ChunkZ) % m_NumSubCaches;
+
+	// Ask the subcache:
+	m_SubCaches[cacheIdx]->GenHeightMap(a_ChunkX, a_ChunkZ, a_HeightMap);
+}
+
+
+
+
+
+bool cHeiGenMultiCache::GetHeightAt(int a_ChunkX, int a_ChunkZ, int a_RelX, int a_RelZ, HEIGHTTYPE & a_Height)
+{
+	// Get the subcache responsible for this chunk:
+	const size_t cacheIdx = ((size_t)a_ChunkX + m_CoeffZ * (size_t)a_ChunkZ) % m_NumSubCaches;
+
+	// Ask the subcache:
+	return m_SubCaches[cacheIdx]->GetHeightAt(a_ChunkX, a_ChunkZ, a_RelX, a_RelZ, a_Height);
+}
+
+
+
+
+
+
+////////////////////////////////////////////////////////////////////////////////
 // cHeiGenClassic:
 
 cHeiGenClassic::cHeiGenClassic(int a_Seed) :
@@ -430,15 +390,15 @@ const cHeiGenBiomal::sGenParam cHeiGenBiomal::m_GenParam[256] =
 	/* biMesaPlateau         */ { 0.1f,   1.0f,  0.05f,     1.5f,  0.01f,    4.0f,  80},
 	
 	// biomes 40 .. 128 are unused, 89 empty placeholders here:
-	{}, {}, {}, {}, {}, {}, {}, {}, {}, {},  // 40 .. 49
-	{}, {}, {}, {}, {}, {}, {}, {}, {}, {},  // 50 .. 59
-	{}, {}, {}, {}, {}, {}, {}, {}, {}, {},  // 60 .. 69
-	{}, {}, {}, {}, {}, {}, {}, {}, {}, {},  // 70 .. 79
-	{}, {}, {}, {}, {}, {}, {}, {}, {}, {},  // 80 .. 89
-	{}, {}, {}, {}, {}, {}, {}, {}, {}, {},  // 90 .. 99
-	{}, {}, {}, {}, {}, {}, {}, {}, {}, {},  // 100 .. 109
-	{}, {}, {}, {}, {}, {}, {}, {}, {}, {},  // 110 .. 119
-	{}, {}, {}, {}, {}, {}, {}, {}, {},      // 120 .. 128
+	{0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0}, {0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0}, {0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0}, {0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0}, {0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0}, {0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0}, {0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0}, {0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0}, {0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0}, {0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0},  // 40 .. 49
+	{0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0}, {0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0}, {0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0}, {0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0}, {0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0}, {0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0}, {0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0}, {0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0}, {0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0}, {0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0},  // 50 .. 59
+	{0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0}, {0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0}, {0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0}, {0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0}, {0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0}, {0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0}, {0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0}, {0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0}, {0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0}, {0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0},  // 60 .. 69
+	{0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0}, {0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0}, {0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0}, {0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0}, {0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0}, {0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0}, {0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0}, {0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0}, {0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0}, {0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0},  // 70 .. 79
+	{0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0}, {0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0}, {0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0}, {0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0}, {0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0}, {0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0}, {0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0}, {0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0}, {0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0}, {0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0},  // 80 .. 89
+	{0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0}, {0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0}, {0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0}, {0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0}, {0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0}, {0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0}, {0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0}, {0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0}, {0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0}, {0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0},  // 90 .. 99
+	{0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0}, {0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0}, {0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0}, {0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0}, {0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0}, {0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0}, {0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0}, {0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0}, {0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0}, {0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0},  // 100 .. 109
+	{0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0}, {0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0}, {0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0}, {0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0}, {0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0}, {0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0}, {0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0}, {0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0}, {0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0}, {0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0},  // 110 .. 119
+	{0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0}, {0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0}, {0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0}, {0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0}, {0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0}, {0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0}, {0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0}, {0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0}, {0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0},                                           // 120 .. 128
 	
 	/* biSunflowerPlains      */ { 0.1f,   2.0f,  0.05f,    12.0f,  0.01f,   10.0f,  40},  // 129
 	/* biDesertM              */ { 0.1f,   2.0f,  0.05f,    12.0f,  0.01f,   10.0f,  40},  // 130
@@ -448,22 +408,22 @@ const cHeiGenBiomal::sGenParam cHeiGenBiomal::m_GenParam[256] =
 	/* biSwamplandM           */ { 1.0f,   3.0f,  1.10f,     7.0f,  0.01f,   0.01f,  60},  // 134
 	
 	// Biomes 135 .. 139 unused, 5 empty placeholders here:
-	{}, {}, {}, {}, {},                                                                    // 135 .. 139
+	{0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0}, {0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0}, {0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0}, {0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0}, {0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0},  // 135 .. 139
 	
 	/* biIcePlainsSpikes      */ { 0.1f,   2.0f,  0.05f,    12.0f,  0.01f,   10.0f,  40},  // 140
 	
 	// Biomes 141 .. 148 unused, 8 empty placeholders here:
-	{}, {}, {}, {}, {}, {}, {}, {},                                                        // 141 .. 148
+	{0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0}, {0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0}, {0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0}, {0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0}, {0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0}, {0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0}, {0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0}, {0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0},  // 141 .. 148
 	
 	/* biJungleM              */ { 0.1f,   3.0f,  0.05f,     6.0f,  0.01f,    6.0f,  70},  // 149
-	{},                                                                                    // 150
+	{0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0},                                               // 150
 	/* biJungleEdgeM          */ { 0.1f,   3.0f,  0.05f,     6.0f,  0.01f,    6.0f,  70},  // 151
-	{}, {}, {},                                                                            // 152 .. 154
+	{0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0}, {0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0}, {0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0},  // 152 .. 154
 	/* biBirchForestM         */ { 0.1f,   1.0f,  0.05f,     2.0f,  0.01f,    4.0f,  70},  // 155
 	/* biBirchForestHillsM    */ { 0.2f,   2.0f,  0.05f,    10.0f,  0.01f,    8.0f,  80},  // 156
 	/* biRoofedForestM        */ { 0.1f,   1.0f,  0.05f,     2.0f,  0.01f,    4.0f,  70},  // 157
 	/* biColdTaigaM           */ { 0.1f,   1.0f,  0.05f,     2.0f,  0.01f,    4.0f,  70},  // 158
-	{},                                                                                    // 159
+	{0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0},                                               // 159
 	/* biMegaSpruceTaiga      */ { 0.1f,   1.0f,  0.05f,     2.0f,  0.01f,    4.0f,  70},  // 160
 	/* biMegaSpruceTaigaHills */ { 0.2f,   2.0f,  0.05f,    10.0f,  0.01f,    8.0f,  80},  // 161
 	/* biExtremeHillsPlusM    */ { 0.2f,   4.0f,  0.05f,    20.0f,  0.01f,   16.0f, 120},  // 162
@@ -611,3 +571,294 @@ NOISE_DATATYPE cHeiGenBiomal::GetHeightAt(int a_RelX, int a_RelZ, int a_ChunkX,
 
 
 
+////////////////////////////////////////////////////////////////////////////////
+// cHeiGenMinMax:
+
+class cHeiGenMinMax:
+	public cTerrainHeightGen
+{
+	typedef cTerrainHeightGen super;
+
+	/** Size of the averaging process, in columns (for each direction). Must be less than 16. */
+	static const int AVERAGING_SIZE = 4;
+
+public:
+	cHeiGenMinMax(int a_Seed, cBiomeGenPtr a_BiomeGen):
+		m_Noise(a_Seed),
+		m_BiomeGen(a_BiomeGen),
+		m_TotalWeight(0)
+	{
+		// Initialize the weights:
+		for (int z = 0; z <= AVERAGING_SIZE * 2; z++)
+		{
+			for (int x = 0; x <= AVERAGING_SIZE * 2; x++)
+			{
+				m_Weights[z][x] = 1 + 2 * AVERAGING_SIZE - std::abs(x - AVERAGING_SIZE) - std::abs(z - AVERAGING_SIZE);
+				m_TotalWeight += m_Weights[z][x];
+			}
+		}
+
+		// Initialize the Perlin generator:
+		m_Perlin.AddOctave(0.04f,   0.2f);
+		m_Perlin.AddOctave(0.02f,   0.1f);
+		m_Perlin.AddOctave(0.01f,   0.05f);
+	}
+
+
+	virtual void GenHeightMap(int a_ChunkX, int a_ChunkZ, cChunkDef::HeightMap & a_HeightMap)
+	{
+		// Generate the biomes for the 3*3 neighbors:
+		cChunkDef::BiomeMap neighborBiomes[3][3];
+		for (int z = 0; z < 3; z++) for (int x = 0; x < 3; x++)
+		{
+			m_BiomeGen->GenBiomes(a_ChunkX + x - 1, a_ChunkZ + z - 1, neighborBiomes[z][x]);
+		}
+
+		// Get the min and max heights based on the biomes:
+		double minHeight[cChunkDef::Width * cChunkDef::Width];
+		double maxHeight[cChunkDef::Width * cChunkDef::Width];
+		for (int z = 0; z < cChunkDef::Width; z++)
+		{
+			for (int x = 0; x < cChunkDef::Width; x++)
+			{
+				// For each column, sum the min and max values of the neighborhood around it:
+				double min = 0, max = 0;
+				for (int relz = 0; relz <= AVERAGING_SIZE * 2; relz++)
+				{
+					int bz = z + 16 + relz - AVERAGING_SIZE;  // Biome Z coord relative to the neighborBiomes start
+					int cz = bz / 16;                         // Chunk Z coord relative to the neighborBiomes start
+					bz = bz % 16;                             // Biome Z coord relative to cz in neighborBiomes
+					for (int relx = 0; relx <= AVERAGING_SIZE * 2; relx++)
+					{
+						int bx = x + 16 + relx - AVERAGING_SIZE;  // Biome X coord relative to the neighborBiomes start
+						int cx = bx / 16;                         // Chunk X coord relative to the neighborBiomes start
+						bx = bx % 16;                             // Biome X coord relative to cz in neighborBiomes
+
+						// Get the biome's min and max heights:
+						double bmin, bmax;
+						getBiomeMinMax(cChunkDef::GetBiome(neighborBiomes[cz][cx], bx, bz), bmin, bmax);
+
+						// Add them to the total, with the weight depending on their relative position to the column:
+						min += bmin * m_Weights[relz][relx];
+						max += bmax * m_Weights[relz][relx];
+					}  // for relx
+				}  // for relz
+				minHeight[x + z * cChunkDef::Width] = min / m_TotalWeight;
+				maxHeight[x + z * cChunkDef::Width] = max / m_TotalWeight;
+			}  // for x
+		}  // for z
+
+		// Generate the base noise:
+		NOISE_DATATYPE noise[cChunkDef::Width * cChunkDef::Width];
+		NOISE_DATATYPE workspace[cChunkDef::Width * cChunkDef::Width];
+		NOISE_DATATYPE startX = static_cast<float>(a_ChunkX * cChunkDef::Width);
+		NOISE_DATATYPE endX = startX + cChunkDef::Width - 1;
+		NOISE_DATATYPE startZ = static_cast<float>(a_ChunkZ * cChunkDef::Width);
+		NOISE_DATATYPE endZ = startZ + cChunkDef::Width - 1;
+		m_Perlin.Generate2D(noise, 16, 16, startX, endX, startZ, endZ, workspace);
+
+		// Make the height by ranging the noise between min and max:
+		for (int z = 0; z < cChunkDef::Width; z++)
+		{
+			for (int x = 0; x < cChunkDef::Width; x++)
+			{
+				double min = minHeight[x + z * cChunkDef::Width];
+				double max = maxHeight[x + z * cChunkDef::Width];
+				double h = (max + min) / 2 + noise[x + z * cChunkDef::Width] * (max - min);
+				cChunkDef::SetHeight(a_HeightMap, x, z, static_cast<HEIGHTTYPE>(h));
+			}
+		}
+	}
+
+	
+	virtual void InitializeHeightGen(cIniFile & a_IniFile)
+	{
+		// No settings available
+	}
+
+protected:
+	cNoise m_Noise;
+
+	cPerlinNoise m_Perlin;
+
+	/** The biome generator to query for the underlying biomes. */
+	cBiomeGenPtr m_BiomeGen;
+
+	/** Weights applied to each of the min / max values in the neighborhood of the currently evaluated column. */
+	double m_Weights[AVERAGING_SIZE * 2 + 1][AVERAGING_SIZE * 2 + 1];
+
+	/** Sum of all the m_Weights items. */
+	double m_TotalWeight;
+
+
+	/** Returns the minimum and maximum heights for the given biome. */
+	void getBiomeMinMax(EMCSBiome a_Biome, double & a_Min, double & a_Max)
+	{
+		switch (a_Biome)
+		{
+			case biBeach:                a_Min = 61; a_Max = 64; break;
+			case biBirchForest:          a_Min = 63; a_Max = 75; break;
+			case biBirchForestHills:     a_Min = 63; a_Max = 90; break;
+			case biBirchForestHillsM:    a_Min = 63; a_Max = 90; break;
+			case biBirchForestM:         a_Min = 63; a_Max = 75; break;
+			case biColdBeach:            a_Min = 61; a_Max = 64; break;
+			case biColdTaiga:            a_Min = 63; a_Max = 75; break;
+			case biColdTaigaHills:       a_Min = 63; a_Max = 90; break;
+			case biColdTaigaM:           a_Min = 63; a_Max = 75; break;
+			case biDeepOcean:            a_Min = 30; a_Max = 60; break;
+			case biDesert:               a_Min = 63; a_Max = 70; break;
+			case biDesertHills:          a_Min = 63; a_Max = 85; break;
+			case biDesertM:              a_Min = 63; a_Max = 70; break;
+			case biEnd:                  a_Min = 10; a_Max = 100; break;
+			case biExtremeHills:         a_Min = 60; a_Max = 120; break;
+			case biExtremeHillsEdge:     a_Min = 63; a_Max = 100; break;
+			case biExtremeHillsM:        a_Min = 60; a_Max = 120; break;
+			case biExtremeHillsPlus:     a_Min = 60; a_Max = 140; break;
+			case biExtremeHillsPlusM:    a_Min = 60; a_Max = 140; break;
+			case biFlowerForest:         a_Min = 63; a_Max = 75; break;
+			case biForest:               a_Min = 63; a_Max = 75; break;
+			case biForestHills:          a_Min = 63; a_Max = 90; break;
+			case biFrozenOcean:          a_Min = 45; a_Max = 64; break;
+			case biFrozenRiver:          a_Min = 60; a_Max = 62; break;
+			case biIceMountains:         a_Min = 63; a_Max = 90; break;
+			case biIcePlains:            a_Min = 63; a_Max = 70; break;
+			case biIcePlainsSpikes:      a_Min = 60; a_Max = 70; break;
+			case biJungle:               a_Min = 60; a_Max = 80; break;
+			case biJungleEdge:           a_Min = 62; a_Max = 75; break;
+			case biJungleEdgeM:          a_Min = 62; a_Max = 75; break;
+			case biJungleHills:          a_Min = 60; a_Max = 90; break;
+			case biJungleM:              a_Min = 60; a_Max = 75; break;
+			case biMegaSpruceTaiga:      a_Min = 63; a_Max = 75; break;
+			case biMegaSpruceTaigaHills: a_Min = 63; a_Max = 90; break;
+			case biMegaTaiga:            a_Min = 63; a_Max = 75; break;
+			case biMegaTaigaHills:       a_Min = 63; a_Max = 90; break;
+			case biMesa:                 a_Min = 63; a_Max = 90; break;
+			case biMesaBryce:            a_Min = 60; a_Max = 67; break;
+			case biMesaPlateau:          a_Min = 75; a_Max = 85; break;
+			case biMesaPlateauF:         a_Min = 80; a_Max = 90; break;
+			case biMesaPlateauFM:        a_Min = 80; a_Max = 90; break;
+			case biMesaPlateauM:         a_Min = 75; a_Max = 85; break;
+			case biMushroomIsland:       a_Min = 63; a_Max = 90; break;
+			case biMushroomShore:        a_Min = 60; a_Max = 75; break;
+			case biNether:               a_Min = 10; a_Max = 100; break;
+			case biOcean:                a_Min = 45; a_Max = 64; break;
+			case biPlains:               a_Min = 63; a_Max = 70; break;
+			case biRiver:                a_Min = 60; a_Max = 62; break;
+			case biRoofedForest:         a_Min = 63; a_Max = 75; break;
+			case biRoofedForestM:        a_Min = 63; a_Max = 75; break;
+			case biSavanna:              a_Min = 63; a_Max = 75; break;
+			case biSavannaM:             a_Min = 63; a_Max = 80; break;
+			case biSavannaPlateau:       a_Min = 75; a_Max = 100; break;
+			case biSavannaPlateauM:      a_Min = 80; a_Max = 160; break;
+			case biStoneBeach:           a_Min = 60; a_Max = 64; break;
+			case biSunflowerPlains:      a_Min = 63; a_Max = 70; break;
+			case biSwampland:            a_Min = 60; a_Max = 67; break;
+			case biSwamplandM:           a_Min = 61; a_Max = 67; break;
+			case biTaiga:                a_Min = 63; a_Max = 75; break;
+			case biTaigaHills:           a_Min = 63; a_Max = 90; break;
+			case biTaigaM:               a_Min = 63; a_Max = 80; break;
+			default:
+			{
+				ASSERT(!"Unknown biome");
+				a_Min = 10;
+				a_Max = 10;
+				break;
+			}
+		}
+	}
+};
+
+
+
+
+
+////////////////////////////////////////////////////////////////////////////////
+// cTerrainHeightGen:
+
+cTerrainHeightGenPtr cTerrainHeightGen::CreateHeightGen(cIniFile & a_IniFile, cBiomeGenPtr a_BiomeGen, int a_Seed, bool & a_CacheOffByDefault)
+{
+	AString HeightGenName = a_IniFile.GetValueSet("Generator", "HeightGen", "");
+	if (HeightGenName.empty())
+	{
+		LOGWARN("[Generator] HeightGen value not set in world.ini, using \"Biomal\".");
+		HeightGenName = "Biomal";
+	}
+	
+	a_CacheOffByDefault = false;
+	cTerrainHeightGenPtr res;
+	if (NoCaseCompare(HeightGenName, "Flat") == 0)
+	{
+		res = std::make_shared<cHeiGenFlat>();
+		a_CacheOffByDefault = true;  // We're generating faster than a cache would retrieve data
+	}
+	else if (NoCaseCompare(HeightGenName, "classic") == 0)
+	{
+		res = std::make_shared<cHeiGenClassic>(a_Seed);
+	}
+	else if (NoCaseCompare(HeightGenName, "DistortedHeightmap") == 0)
+	{
+		// Not a heightmap-based generator, but it used to be accessible via HeightGen, so we need to skip making the default out of it
+		// Return an empty pointer, the caller will create the proper generator:
+		return cTerrainHeightGenPtr();
+	}
+	else if (NoCaseCompare(HeightGenName, "End") == 0)
+	{
+		// Not a heightmap-based generator, but it used to be accessible via HeightGen, so we need to skip making the default out of it
+		// Return an empty pointer, the caller will create the proper generator:
+		return cTerrainHeightGenPtr();
+	}
+	else if (NoCaseCompare(HeightGenName, "MinMax") == 0)
+	{
+		res = std::make_shared<cHeiGenMinMax>(a_Seed, a_BiomeGen);
+	}
+	else if (NoCaseCompare(HeightGenName, "Mountains") == 0)
+	{
+		res = std::make_shared<cHeiGenMountains>(a_Seed);
+	}
+	else if (NoCaseCompare(HeightGenName, "BiomalNoise3D") == 0)
+	{
+		// Not a heightmap-based generator, but it used to be accessible via HeightGen, so we need to skip making the default out of it
+		// Return an empty pointer, the caller will create the proper generator:
+		return cTerrainHeightGenPtr();
+	}
+	else if (NoCaseCompare(HeightGenName, "Noise3D") == 0)
+	{
+		// Not a heightmap-based generator, but it used to be accessible via HeightGen, so we need to skip making the default out of it
+		// Return an empty pointer, the caller will create the proper generator:
+		return cTerrainHeightGenPtr();
+	}
+	else if (NoCaseCompare(HeightGenName, "Biomal") == 0)
+	{
+		res = std::make_shared<cHeiGenBiomal>(a_Seed, a_BiomeGen);
+
+		/*
+		// Performance-testing:
+		LOGINFO("Measuring performance of cHeiGenBiomal...");
+		clock_t BeginTick = clock();
+		for (int x = 0; x < 500; x++)
+		{
+			cChunkDef::HeightMap Heights;
+			res->GenHeightMap(x * 5, x * 5, Heights);
+		}
+		clock_t Duration = clock() - BeginTick;
+		LOGINFO("HeightGen for 500 chunks took %d ticks (%.02f sec)", Duration, (double)Duration / CLOCKS_PER_SEC);
+		//*/
+	}
+	else
+	{
+		// No match found, force-set the default and retry
+		LOGWARN("Unknown HeightGen \"%s\", using \"Biomal\" instead.", HeightGenName.c_str());
+		a_IniFile.SetValue("Generator", "HeightGen", "Biomal");
+		return CreateHeightGen(a_IniFile, a_BiomeGen, a_Seed, a_CacheOffByDefault);
+	}
+	
+	// Read the settings:
+	res->InitializeHeightGen(a_IniFile);
+
+	return res;
+}
+
+
+
+
+
diff --git a/src/Generating/HeiGen.h b/src/Generating/HeiGen.h
index 6ae5ba362..62bb227c6 100644
--- a/src/Generating/HeiGen.h
+++ b/src/Generating/HeiGen.h
@@ -2,10 +2,12 @@
 // HeiGen.h
 
 /*
-Interfaces to the various height generators:
+Interfaces to the various height-based terrain shape generators:
 	- cHeiGenFlat
 	- cHeiGenClassic
 	- cHeiGenBiomal
+
+Also implements the heightmap cache
 */
 
 
@@ -15,32 +17,13 @@ Interfaces to the various height generators:
 #pragma once
 
 #include "ComposableGenerator.h"
-#include "../Noise.h"
-
-
-
-
-
-class cHeiGenFlat :
-	public cTerrainHeightGen
-{
-public:
-	cHeiGenFlat(void) : m_Height(5) {}
-	
-protected:
-
-	int m_Height;
-
-	// cTerrainHeightGen overrides:
-	virtual void GenHeightMap(int a_ChunkX, int a_ChunkZ, cChunkDef::HeightMap & a_HeightMap) override;
-	virtual void InitializeHeightGen(cIniFile & a_IniFile) override;
-} ;
+#include "../Noise/Noise.h"
 
 
 
 
 
-/// A simple cache that stores N most recently generated chunks' heightmaps; N being settable upon creation
+/** A simple cache that stores N most recently generated chunks' heightmaps; N being settable upon creation */
 class cHeiGenCache :
 	public cTerrainHeightGen
 {
@@ -50,15 +33,11 @@ public:
 	
 	// cTerrainHeightGen overrides:
 	virtual void GenHeightMap(int a_ChunkX, int a_ChunkZ, cChunkDef::HeightMap & a_HeightMap) override;
-	virtual void InitializeHeightGen(cIniFile & a_IniFile) override;
 	
-	/// Retrieves height at the specified point in the cache, returns true if found, false if not found
+	/** Retrieves height at the specified point in the cache, returns true if found, false if not found */
 	bool GetHeightAt(int a_ChunkX, int a_ChunkZ, int a_RelX, int a_RelZ, HEIGHTTYPE & a_Height);
 	
 protected:
-
-	cTerrainHeightGenPtr m_HeiGenToCache;
-	
 	struct sCacheData
 	{
 		int m_ChunkX;
@@ -66,6 +45,9 @@ protected:
 		cChunkDef::HeightMap m_HeightMap;
 	} ;
 	
+	/** The terrain height generator that is being cached. */
+	cTerrainHeightGenPtr m_HeiGenToCache;
+	
 	// To avoid moving large amounts of data for the MRU behavior, we MRU-ize indices to an array of the actual data
 	int          m_CacheSize;
 	int *        m_CacheOrder;  // MRU-ized order, indices into m_CacheData array
@@ -81,6 +63,57 @@ protected:
 
 
 
+/** Caches heightmaps in multiple underlying caches to improve the distribution and lower the chain length. */
+class cHeiGenMultiCache:
+	public cTerrainHeightGen
+{
+public:
+	cHeiGenMultiCache(cTerrainHeightGenPtr a_HeightGenToCache, size_t a_SubCacheSize, size_t a_NumSubCaches);
+
+	// cTerrainHeightGen overrides:
+	virtual void GenHeightMap(int a_ChunkX, int a_ChunkZ, cChunkDef::HeightMap & a_HeightMap) override;
+	
+	/** Retrieves height at the specified point in the cache, returns true if found, false if not found */
+	bool GetHeightAt(int a_ChunkX, int a_ChunkZ, int a_RelX, int a_RelZ, HEIGHTTYPE & a_Height);
+
+protected:
+	typedef SharedPtr<cHeiGenCache> cHeiGenCachePtr;
+	typedef std::vector<cHeiGenCachePtr> cHeiGenCachePtrs;
+
+
+	/** The coefficient used to turn Z coords into index (x + Coeff * z). */
+	static const size_t m_CoeffZ = 5;
+
+	/** Number of sub-caches, pulled out of m_SubCaches.size() for performance reasons. */
+	size_t m_NumSubCaches;
+
+	/** The individual sub-caches. */
+	cHeiGenCachePtrs m_SubCaches;
+};
+
+
+
+
+
+class cHeiGenFlat :
+	public cTerrainHeightGen
+{
+public:
+	cHeiGenFlat(void) : m_Height(5) {}
+	
+protected:
+
+	int m_Height;
+
+	// cTerrainHeightGen overrides:
+	virtual void GenHeightMap(int a_ChunkX, int a_ChunkZ, cChunkDef::HeightMap & a_HeightMap) override;
+	virtual void InitializeHeightGen(cIniFile & a_IniFile) override;
+} ;
+
+
+
+
+
 class cHeiGenClassic :
 	public cTerrainHeightGen
 {
@@ -137,7 +170,11 @@ public:
 		m_BiomeGen(a_BiomeGen)
 	{
 	}
-	
+
+	// cTerrainHeightGen overrides:
+	virtual void GenHeightMap(int a_ChunkX, int a_ChunkZ, cChunkDef::HeightMap & a_HeightMap) override;
+	virtual void InitializeHeightGen(cIniFile & a_IniFile) override;
+
 protected:
 
 	typedef cChunkDef::BiomeMap BiomeNeighbors[3][3];
@@ -154,11 +191,8 @@ protected:
 		float m_BaseHeight;
 	} ;
 	static const sGenParam m_GenParam[256];
-	
-	// cTerrainHeightGen overrides:
-	virtual void GenHeightMap(int a_ChunkX, int a_ChunkZ, cChunkDef::HeightMap & a_HeightMap) override;
-	virtual void InitializeHeightGen(cIniFile & a_IniFile) override;
-	
+
+
 	NOISE_DATATYPE GetHeightAt(int a_RelX, int a_RelZ, int a_ChunkX, int a_ChunkZ, const BiomeNeighbors & a_BiomeNeighbors);
 } ;
 
diff --git a/src/Generating/IntGen.h b/src/Generating/IntGen.h
new file mode 100644
index 000000000..b25e378c0
--- /dev/null
+++ b/src/Generating/IntGen.h
@@ -0,0 +1,1406 @@
+
+// IntGen.h
+
+// Declares the cIntGen class and descendants for generating and filtering various 2D arrays of ints
+
+/*
+The integers generated may be interpreted in several ways:
+- land/see designators
+	- 0 = ocean
+	- >0 = land
+- biome group
+	- 0 = ocean
+	- 1 = desert biomes
+	- 2 = temperate biomes
+	- 3 = mountains (hills and forests)
+	- 4 = ice biomes
+- biome group with "bgfRare" flag (for generating rare biomes for the group)
+- biome IDs
+The interpretation depends on the generator used and on the position in the chain.
+
+The generators can be chained together - one produces data that another one consumes.
+Some of such chain connections require changing the data dimensions between the two, which is handled automatically
+by using templates.
+*/
+
+
+
+
+
+#pragma once
+
+#include "../BiomeDef.h"
+
+
+
+
+
+/** Constants representing the biome group designators. */
+const int bgOcean        = 0;
+const int bgDesert       = 1;
+const int bgTemperate    = 2;
+const int bgMountains    = 3;
+const int bgIce          = 4;
+const int bgLandOceanMax = 4;  // Maximum biome group value generated in the landOcean generator
+const int bgfRare        = 1024;  // Flag added to values to generate rare biomes for the group
+
+
+
+
+
+/** Interface that all the generator classes provide. */
+template <int SizeX, int SizeZ = SizeX>
+class cIntGen
+{
+public:
+	/** Force a virtual destructor in all descendants.
+	Descendants contain virtual functions and are referred to via pointer-to-base, so they need a virtual destructor. */
+	virtual ~cIntGen() {}
+
+	/** Holds the array of values generated by this class (descendant). */
+	typedef int Values[SizeX * SizeZ];
+
+	/** Generates the array of templated size into a_Values, based on given min coords. */
+	virtual void GetInts(int a_MinX, int a_MinZ, Values & a_Values) = 0;
+};
+
+
+
+
+
+/** Provides additional cNoise member and its helper functions. */
+template <int SizeX, int SizeZ = SizeX>
+class cIntGenWithNoise :
+	public cIntGen<SizeX, SizeZ>
+{
+	typedef cIntGen<SizeX, SizeZ> super;
+
+public:
+	cIntGenWithNoise(int a_Seed) :
+		m_Noise(a_Seed)
+	{
+	}
+
+protected:
+	cNoise m_Noise;
+
+	/** Chooses one of a_Val1 or a_Val2, based on m_Noise and the coordinates for querying the noise. */
+	int ChooseRandomOne(int a_RndX, int a_RndZ, int a_Val1, int a_Val2)
+	{
+		int rnd = m_Noise.IntNoise2DInt(a_RndX, a_RndZ) / 7;
+		return ((rnd & 1) == 0) ? a_Val1 : a_Val2;
+	}
+
+	/** Chooses one of a_ValN, based on m_Noise and the coordinates for querying the noise. */
+	int ChooseRandomOne(int a_RndX, int a_RndZ, int a_Val1, int a_Val2, int a_Val3, int a_Val4)
+	{
+		int rnd = m_Noise.IntNoise2DInt(a_RndX, a_RndZ) / 7;
+		switch (rnd % 4)
+		{
+			case 0:  return a_Val1;
+			case 1:  return a_Val2;
+			case 2:  return a_Val3;
+			default: return a_Val4;
+		}
+	}
+};
+
+
+
+
+
+
+/** Generates a 2D array of random integers in the specified range [0 .. Range). */
+template <int Range, int SizeX, int SizeZ = SizeX>
+class cIntGenChoice :
+	public cIntGenWithNoise<SizeX, SizeZ>
+{
+	typedef cIntGenWithNoise<SizeX, SizeZ> super;
+
+public:
+	cIntGenChoice(int a_Seed) :
+		super(a_Seed)
+	{
+	}
+
+
+	virtual void GetInts(int a_MinX, int a_MinZ, typename super::Values & a_Values) override
+	{
+		for (int z = 0; z < SizeZ; z++)
+		{
+			int BaseZ = a_MinZ + z;
+			for (int x = 0; x < SizeX; x++)
+			{
+				a_Values[x + SizeX * z] = (super::m_Noise.IntNoise2DInt(a_MinX + x, BaseZ) / 7) % Range;
+			}
+		}  // for z
+	}
+};
+
+
+
+
+
+
+/** Decides between the ocean and landmass biomes.
+Has a threshold (in percent) of how much land, the larger the threshold, the more land.
+Generates 0 for ocean, biome group ID for landmass. */
+template <int SizeX, int SizeZ = SizeX>
+class cIntGenLandOcean :
+	public cIntGenWithNoise<SizeX, SizeZ>
+{
+	typedef cIntGenWithNoise<SizeX, SizeZ> super;
+
+public:
+	cIntGenLandOcean(int a_Seed, int a_Threshold) :
+		super(a_Seed),
+		m_Threshold(a_Threshold)
+	{
+	}
+
+
+	virtual void GetInts(int a_MinX, int a_MinZ, typename super::Values & a_Values) override
+	{
+		for (int z = 0; z < SizeZ; z++)
+		{
+			int BaseZ = a_MinZ + z;
+			for (int x = 0; x < SizeX; x++)
+			{
+				int rnd = (super::m_Noise.IntNoise2DInt(a_MinX + x, BaseZ) / 7);
+				a_Values[x + SizeX * z] = ((rnd % 100) < m_Threshold) ? ((rnd / 101) % bgLandOceanMax + 1) : 0;
+			}
+		}
+
+		// If the centerpoint of the world is within the area, set it to bgTemperate, always:
+		if ((a_MinX <= 0) && (a_MinZ <= 0) && (a_MinX + SizeX > 0) && (a_MinZ + SizeZ > 0))
+		{
+			a_Values[-a_MinX - a_MinZ * SizeX] = bgTemperate;
+		}
+	}
+
+protected:
+	int m_Threshold;
+};
+
+
+
+
+
+/** Zooms the underlying value array to twice the size. Uses random-neighbor for the pixels in-between.
+This means that the zoome out image is randomly distorted. Applying zoom several times provides all
+the distortion that the generators need. */
+template <int SizeX, int SizeZ = SizeX>
+class cIntGenZoom :
+	public cIntGenWithNoise<SizeX, SizeZ>
+{
+	typedef cIntGenWithNoise<SizeX, SizeZ> super;
+
+protected:
+	static const int m_LowerSizeX = (SizeX / 2) + 2;
+	static const int m_LowerSizeZ = (SizeZ / 2) + 2;
+
+public:
+	typedef std::shared_ptr<cIntGen<m_LowerSizeX, m_LowerSizeZ>> Underlying;
+
+
+	cIntGenZoom(int a_Seed, Underlying a_UnderlyingGen) :
+		super(a_Seed),
+		m_UnderlyingGen(a_UnderlyingGen)
+	{
+	}
+
+
+	virtual void GetInts(int a_MinX, int a_MinZ, typename super::Values & a_Values) override
+	{
+		// Generate the underlying data with half the resolution:
+		int lowerMinX = a_MinX >> 1;
+		int lowerMinZ = a_MinZ >> 1;
+		int lowerData[m_LowerSizeX * m_LowerSizeZ];
+		m_UnderlyingGen->GetInts(lowerMinX, lowerMinZ, lowerData);
+		const int lowStepX = (m_LowerSizeX - 1) * 2;
+		const int lowStepZ = (m_LowerSizeZ - 1) * 2;
+		int cache[lowStepX * lowStepZ];
+
+		// Discreet-interpolate the values into twice the size:
+		for (int z = 0; z < m_LowerSizeZ - 1; ++z)
+		{
+			int idx = (z * 2) * lowStepX;
+			int PrevZ0 = lowerData[z * m_LowerSizeX];
+			int PrevZ1 = lowerData[(z + 1) * m_LowerSizeX];
+
+			for (int x = 0; x < m_LowerSizeX - 1; ++x)
+			{
+				int ValX1Z0 = lowerData[x + 1 + z * m_LowerSizeX];
+				int ValX1Z1 = lowerData[x + 1 + (z + 1) * m_LowerSizeX];
+				int RndX = (x + lowerMinX) * 2;
+				int RndZ = (z + lowerMinZ) * 2;
+				cache[idx] = PrevZ0;
+				cache[idx + lowStepX] = super::ChooseRandomOne(RndX, RndZ + 1, PrevZ0, PrevZ1);
+				cache[idx + 1]        = super::ChooseRandomOne(RndX, RndZ - 1, PrevZ0, ValX1Z0);
+				cache[idx + 1 + lowStepX] = super::ChooseRandomOne(RndX, RndZ, PrevZ0, ValX1Z0, PrevZ1, ValX1Z1);
+				idx += 2;
+				PrevZ0 = ValX1Z0;
+				PrevZ1 = ValX1Z1;
+			}
+		}
+
+		// Copy from Cache into a_Values; take into account the even/odd offsets in a_Min:
+		for (int z = 0; z < SizeZ; ++z)
+		{
+			memcpy(a_Values + z * SizeX, cache + (z + (a_MinZ & 1)) * lowStepX + (a_MinX & 1), SizeX * sizeof(int));
+		}
+	}
+
+protected:
+	Underlying m_UnderlyingGen;
+};
+
+
+
+
+
+/** Smoothes out some artifacts generated by the zooming - mostly single-pixel values.
+Compares each pixel to its neighbors and if the neighbors are equal, changes the pixel to their value. */
+template <int SizeX, int SizeZ = SizeX>
+class cIntGenSmooth :
+	public cIntGenWithNoise<SizeX, SizeZ>
+{
+	typedef cIntGenWithNoise<SizeX, SizeZ> super;
+	static const int m_LowerSizeX = SizeX + 2;
+	static const int m_LowerSizeZ = SizeZ + 2;
+
+public:
+	typedef std::shared_ptr<cIntGen<m_LowerSizeX, m_LowerSizeZ>> Underlying;
+
+
+	cIntGenSmooth(int a_Seed, Underlying a_Underlying) :
+		super(a_Seed),
+		m_Underlying(a_Underlying)
+	{
+	}
+
+
+	virtual void GetInts(int a_MinX, int a_MinZ, typename super::Values & a_Values) override
+	{
+		// Generate the underlying values:
+		int lowerData[m_LowerSizeX * m_LowerSizeZ];
+		m_Underlying->GetInts(a_MinX - 1, a_MinZ - 1, lowerData);
+
+		// Smooth - for each square check if the surroundings are the same, if so, expand them diagonally.
+		// Also get rid of single-pixel irregularities (A-B-A):
+		for (int z = 0; z < SizeZ; z++)
+		{
+			int NoiseZ = a_MinZ + z;
+			for (int x = 0; x < SizeX; x++)
+			{
+				int val   = lowerData[x + 1 + (z + 1) * m_LowerSizeX];
+				int above = lowerData[x + 1 +  z      * m_LowerSizeX];
+				int below = lowerData[x + 1 + (z + 2) * m_LowerSizeX];
+				int left  = lowerData[x     + (z + 1) * m_LowerSizeX];
+				int right = lowerData[x + 2 + (z + 1) * m_LowerSizeX];
+
+				if ((left == right) && (above == below))
+				{
+					if (((super::m_Noise.IntNoise2DInt(a_MinX + x, NoiseZ) / 7) % 2) == 0)
+					{
+						val = left;
+					}
+					else
+					{
+						val = above;
+					}
+				}
+				else
+				{
+					if (left == right)
+					{
+						val = left;
+					}
+
+					if (above == below)
+					{
+						val = above;
+					}
+				}
+
+				a_Values[x + z * SizeX] = val;
+			}
+		}
+	}
+
+protected:
+	Underlying m_Underlying;
+};
+
+
+
+
+
+/** Converts land biomes at the edge of an ocean into the respective beach biome. */
+template <int SizeX, int SizeZ = SizeX>
+class cIntGenBeaches :
+	public cIntGen<SizeX, SizeZ>
+{
+	typedef cIntGen<SizeX, SizeZ> super;
+	static const int m_UnderlyingSizeX = SizeX + 2;
+	static const int m_UnderlyingSizeZ = SizeZ + 2;
+
+public:
+	typedef std::shared_ptr<cIntGen<m_UnderlyingSizeX, m_UnderlyingSizeZ>> Underlying;
+
+
+	cIntGenBeaches(Underlying a_Underlying) :
+		m_Underlying(a_Underlying)
+	{
+	}
+
+
+	virtual void GetInts(int a_MinX, int a_MinZ, typename super::Values & a_Values) override
+	{
+		// Map for biome -> its beach:
+		static const int ToBeach[] =
+		{
+			/* biOcean            */ biOcean,
+			/* biPlains           */ biBeach,
+			/* biDesert           */ biBeach,
+			/* biExtremeHills     */ biStoneBeach,
+			/* biForest           */ biBeach,
+			/* biTaiga            */ biColdBeach,
+			/* biSwampland        */ biSwampland,
+			/* biRiver            */ biRiver,
+			/* biNether           */ biNether,
+			/* biEnd              */ biEnd,
+			/* biFrozenOcean      */ biColdBeach,
+			/* biFrozenRiver      */ biColdBeach,
+			/* biIcePlains        */ biColdBeach,
+			/* biIceMountains     */ biColdBeach,
+			/* biMushroomIsland   */ biMushroomShore,
+			/* biMushroomShore    */ biMushroomShore,
+			/* biBeach            */ biBeach,
+			/* biDesertHills      */ biBeach,
+			/* biForestHills      */ biBeach,
+			/* biTaigaHills       */ biColdBeach,
+			/* biExtremeHillsEdge */ biStoneBeach,
+			/* biJungle           */ biBeach,
+			/* biJungleHills      */ biBeach,
+			/* biJungleEdge       */ biBeach,
+			/* biDeepOcean        */ biOcean,
+			/* biStoneBeach       */ biStoneBeach,
+			/* biColdBeach        */ biColdBeach,
+			/* biBirchForest      */ biBeach,
+			/* biBirchForestHills */ biBeach,
+			/* biRoofedForest     */ biBeach,
+			/* biColdTaiga        */ biColdBeach,
+			/* biColdTaigaHills   */ biColdBeach,
+			/* biMegaTaiga        */ biStoneBeach,
+			/* biMegaTaigaHills   */ biStoneBeach,
+			/* biExtremeHillsPlus */ biStoneBeach,
+			/* biSavanna          */ biBeach,
+			/* biSavannaPlateau   */ biBeach,
+			/* biMesa             */ biMesa,
+			/* biMesaPlateauF     */ biMesa,
+			/* biMesaPlateau      */ biMesa,
+		};
+
+		// Generate the underlying values:
+		int lowerValues[m_UnderlyingSizeX * m_UnderlyingSizeZ];
+		m_Underlying->GetInts(a_MinX - 1, a_MinZ - 1, lowerValues);
+
+		// Add beaches between ocean and biomes:
+		for (int z = 0; z < SizeZ; z++)
+		{
+			for (int x = 0; x < SizeX; x++)
+			{
+				int val   = lowerValues[x + 1 + (z + 1) * m_UnderlyingSizeX];
+				int above = lowerValues[x + 1 + z       * m_UnderlyingSizeX];
+				int below = lowerValues[x + 1 + (z + 2) * m_UnderlyingSizeX];
+				int left  = lowerValues[x     + (z + 1) * m_UnderlyingSizeX];
+				int right = lowerValues[x + 2 + (z + 1) * m_UnderlyingSizeX];
+				if (!IsBiomeOcean(val))
+				{
+					if (IsBiomeOcean(above) || IsBiomeOcean(below) || IsBiomeOcean(left) || IsBiomeOcean(right))
+					{
+						// First convert the value to a regular biome (drop the M flag), then modulo by our biome count:
+						val = ToBeach[(val % 128) % ARRAYCOUNT(ToBeach)];
+					}
+				}
+				a_Values[x + z * SizeX] = val;
+			}
+		}
+	}
+
+protected:
+	Underlying m_Underlying;
+};
+
+
+
+
+
+/** Generates the underlying numbers and then randomly changes some ocean group pixels into random land
+biome group pixels, based on the predefined chance. */
+template <int SizeX, int SizeZ = SizeX>
+class cIntGenAddIslands :
+	public cIntGenWithNoise<SizeX, SizeZ>
+{
+	typedef cIntGenWithNoise<SizeX, SizeZ> super;
+
+public:
+	typedef std::shared_ptr<cIntGen<SizeX, SizeZ>> Underlying;
+
+
+	cIntGenAddIslands(int a_Seed, int a_Chance, Underlying a_Underlying) :
+		super(a_Seed),
+		m_Chance(a_Chance),
+		m_Underlying(a_Underlying)
+	{
+	}
+
+
+	virtual void GetInts(int a_MinX, int a_MinZ, typename super::Values & a_Values) override
+	{
+		m_Underlying->GetInts(a_MinX, a_MinZ, a_Values);
+		for (int z = 0; z < SizeZ; z++)
+		{
+			for (int x = 0; x < SizeX; x++)
+			{
+				if (a_Values[x + z * SizeX] == bgOcean)
+				{
+					int rnd = super::m_Noise.IntNoise2DInt(a_MinX + x, a_MinZ + z) / 7;
+					if (rnd % 1000 < m_Chance)
+					{
+						a_Values[x + z * SizeX] = (rnd / 1003) % bgLandOceanMax;
+					}
+				}
+			}  // for x
+		}  // for z
+	}
+
+protected:
+	/** Chance, in permille, of an island being generated in ocean. */
+	int m_Chance;
+
+	Underlying m_Underlying;
+};
+
+
+
+
+
+/** A filter that adds an edge biome group between two biome groups that need an edge between them. */
+template <int SizeX, int SizeZ = SizeX>
+class cIntGenBiomeGroupEdges :
+	public cIntGen<SizeX, SizeZ>
+{
+	typedef cIntGen<SizeX, SizeZ> super;
+
+	static const int m_UnderlyingSizeX = SizeX + 2;
+	static const int m_UnderlyingSizeZ = SizeZ + 2;
+
+public:
+
+	typedef std::shared_ptr<cIntGen<m_UnderlyingSizeX, m_UnderlyingSizeZ>> Underlying;
+
+	cIntGenBiomeGroupEdges(Underlying a_Underlying) :
+		m_Underlying(a_Underlying)
+	{
+	}
+
+
+	virtual void GetInts(int a_MinX, int a_MinZ, typename super::Values & a_Values)
+	{
+		// Generate the underlying biome groups:
+		int lowerValues[m_UnderlyingSizeX * m_UnderlyingSizeZ];
+		m_Underlying->GetInts(a_MinX, a_MinZ, lowerValues);
+
+		// Change the biomes on incompatible edges into an edge biome:
+		for (int z = 0; z < SizeZ; z++)
+		{
+			for (int x = 0; x < SizeX; x++)
+			{
+				int val   = lowerValues[x + 1 + (z + 1) * m_UnderlyingSizeX];
+				int above = lowerValues[x + 1 + z       * m_UnderlyingSizeX];
+				int below = lowerValues[x + 1 + (z + 2) * m_UnderlyingSizeX];
+				int left  = lowerValues[x     + (z + 1) * m_UnderlyingSizeX];
+				int right = lowerValues[x + 2 + (z + 1) * m_UnderlyingSizeX];
+				switch (val)
+				{
+					// Desert should neighbor only oceans, desert and temperates; change to temperate when another:
+					case bgDesert:
+					{
+						if (
+							!isDesertCompatible(above) ||
+							!isDesertCompatible(below) ||
+							!isDesertCompatible(left) ||
+							!isDesertCompatible(right)
+						)
+						{
+							val = bgTemperate;
+						}
+						break;
+					}  // case bgDesert
+
+					// Ice should not neighbor deserts; change to temperate:
+					case bgIce:
+					{
+						if (
+							(above == bgDesert) ||
+							(below == bgDesert) ||
+							(left  == bgDesert) ||
+							(right == bgDesert)
+						)
+						{
+							val = bgTemperate;
+						}
+						break;
+					}  // case bgIce
+				}
+				a_Values[x + z * SizeX] = val;
+			}  // for x
+		}  // for z
+	}
+
+protected:
+	Underlying m_Underlying;
+
+
+	inline bool isDesertCompatible(int a_BiomeGroup)
+	{
+		switch (a_BiomeGroup)
+		{
+			case bgOcean:
+			case bgDesert:
+			case bgTemperate:
+			{
+				return true;
+			}
+			default:
+			{
+				return false;
+			}
+		}
+	}
+};
+
+
+
+
+
+/** Turns biome group indices into real biomes.
+For each pixel, takes its biome group and chooses a random biome from that group; replaces the value with
+that biome. */
+template <int SizeX, int SizeZ = SizeX>
+class cIntGenBiomes :
+	public cIntGenWithNoise<SizeX, SizeZ>
+{
+	typedef cIntGenWithNoise<SizeX, SizeZ> super;
+
+public:
+	typedef std::shared_ptr<cIntGen<SizeX, SizeZ>> Underlying;
+
+
+	cIntGenBiomes(int a_Seed, Underlying a_Underlying) :
+		super(a_Seed),
+		m_Underlying(a_Underlying)
+	{
+	}
+
+
+	virtual void GetInts(int a_MinX, int a_MinZ, typename super::Values & a_Values) override
+	{
+		// Define the per-biome-group biomes:
+		static const int oceanBiomes[] =
+		{
+			biOcean,  // biDeepOcean,
+		};
+
+		// Same as oceanBiomes, there are no rare oceanic biomes (mushroom islands are handled separately)
+		static const int rareOceanBiomes[] =
+		{
+			biOcean,
+		};
+
+		static const int desertBiomes[] =
+		{
+			biDesert, biDesert, biDesert, biDesert, biDesert, biDesert, biSavanna, biSavanna, biPlains,
+		};
+
+		static const int rareDesertBiomes[] =
+		{
+			biMesaPlateau, biMesaPlateauF,
+		};
+
+		static const int temperateBiomes[] =
+		{
+			biForest, biForest, biRoofedForest, biExtremeHills, biPlains, biBirchForest, biSwampland,
+		};
+
+		static const int rareTemperateBiomes[] =
+		{
+			biJungle,  // Jungle is not strictly temperate, but let's piggyback it here
+		};
+
+		static const int mountainBiomes[] =
+		{
+			biExtremeHills, biForest, biTaiga, biPlains,
+		};
+
+		static const int rareMountainBiomes[] =
+		{
+			biMegaTaiga,
+		};
+
+		static const int iceBiomes[] =
+		{
+			biIcePlains, biIcePlains, biIcePlains, biIcePlains, biColdTaiga,
+		};
+
+		// Same as iceBiomes, there's no rare ice biome
+		static const int rareIceBiomes[] =
+		{
+			biIcePlains, biIcePlains, biIcePlains, biIcePlains, biColdTaiga,
+		};
+
+		static const cBiomesInGroups biomesInGroups[] =
+		{
+			/* bgOcean */     { static_cast<int>(ARRAYCOUNT(oceanBiomes)),     oceanBiomes},
+			/* bgDesert */    { static_cast<int>(ARRAYCOUNT(desertBiomes)),    desertBiomes},
+			/* bgTemperate */ { static_cast<int>(ARRAYCOUNT(temperateBiomes)), temperateBiomes},
+			/* bgMountains */ { static_cast<int>(ARRAYCOUNT(mountainBiomes)),  mountainBiomes},
+			/* bgIce */       { static_cast<int>(ARRAYCOUNT(iceBiomes)),       iceBiomes},
+		};
+
+		static const cBiomesInGroups rareBiomesInGroups[] =
+		{
+			/* bgOcean */     { static_cast<int>(ARRAYCOUNT(rareOceanBiomes)),     rareOceanBiomes},
+			/* bgDesert */    { static_cast<int>(ARRAYCOUNT(rareDesertBiomes)),    rareDesertBiomes},
+			/* bgTemperate */ { static_cast<int>(ARRAYCOUNT(rareTemperateBiomes)), rareTemperateBiomes},
+			/* bgMountains */ { static_cast<int>(ARRAYCOUNT(rareMountainBiomes)),  rareMountainBiomes},
+			/* bgIce */       { static_cast<int>(ARRAYCOUNT(rareIceBiomes)),       rareIceBiomes},
+		};
+
+		// Generate the underlying values, representing biome groups:
+		m_Underlying->GetInts(a_MinX, a_MinZ, a_Values);
+
+		// Overwrite each biome group with a random biome from that group:
+		for (int z = 0; z < SizeZ; z++)
+		{
+			int IdxZ = z * SizeX;
+			for (int x = 0; x < SizeX; x++)
+			{
+				int val = a_Values[x + IdxZ];
+				const cBiomesInGroups & Biomes = (val > bgfRare) ?
+					rareBiomesInGroups[(val & (bgfRare - 1)) % ARRAYCOUNT(rareBiomesInGroups)] :
+					biomesInGroups[val % ARRAYCOUNT(biomesInGroups)];
+				int rnd = (super::m_Noise.IntNoise2DInt(x + a_MinX, z + a_MinZ) / 7);
+				a_Values[x + IdxZ] = Biomes.Biomes[rnd % Biomes.Count];
+			}
+		}
+	}
+
+protected:
+
+	struct cBiomesInGroups
+	{
+		const int Count;
+		const int * Biomes;
+	};
+
+
+	/** The underlying int generator */
+	Underlying m_Underlying;
+};
+
+
+
+
+
+/** Randomly replaces pixels of one value to another value, using the given chance. */
+template <int SizeX, int SizeZ = SizeX>
+class cIntGenReplaceRandomly :
+	public cIntGenWithNoise<SizeX, SizeZ>
+{
+	typedef cIntGenWithNoise<SizeX, SizeZ> super;
+
+public:
+	typedef std::shared_ptr<cIntGen<SizeX, SizeZ>> Underlying;
+
+
+	cIntGenReplaceRandomly(int a_From, int a_To, int a_Chance, int a_Seed, Underlying a_Underlying) :
+		super(a_Seed),
+		m_From(a_From),
+		m_To(a_To),
+		m_Chance(a_Chance),
+		m_Underlying(a_Underlying)
+	{
+	}
+
+
+	virtual void GetInts(int a_MinX, int a_MinZ, typename super::Values & a_Values) override
+	{
+		// Generate the underlying values:
+		m_Underlying->GetInts(a_MinX, a_MinZ, a_Values);
+
+		// Replace some of the values:
+		for (int z = 0; z < SizeZ; z++)
+		{
+			int idxZ = z * SizeX;
+			for (int x = 0; x < SizeX; x++)
+			{
+				int idx = x + idxZ;
+				if (a_Values[idx] == m_From)
+				{
+					int rnd = super::m_Noise.IntNoise2DInt(x + a_MinX, z + a_MinZ) / 7;
+					if (rnd % 1000 < m_Chance)
+					{
+						a_Values[idx] = m_To;
+					}
+				}
+			}
+		}  // for z
+	}
+
+
+protected:
+	/** The original value to be replaced. */
+	int m_From;
+
+	/** The destination value to which to replace. */
+	int m_To;
+
+	/** Chance, in permille, of replacing the value. */
+	int m_Chance;
+
+	Underlying m_Underlying;
+};
+
+
+
+
+
+/** Mixer that joins together finalized biomes and rivers.
+It first checks for oceans, if there is an ocean in the Biomes, it keeps the ocean.
+If there's no ocean, it checks Rivers for a river, if there is a river, it uses the Biomes to select either
+regular river or frozen river, based on the biome. */
+template <int SizeX, int SizeZ = SizeX>
+class cIntGenMixRivers:
+	public cIntGen<SizeX, SizeZ>
+{
+	typedef cIntGen<SizeX, SizeZ> super;
+
+public:
+	typedef std::shared_ptr<cIntGen<SizeX, SizeZ>> Underlying;
+
+
+	cIntGenMixRivers(Underlying a_Biomes, Underlying a_Rivers):
+		m_Biomes(a_Biomes),
+		m_Rivers(a_Rivers)
+	{
+	}
+
+
+	virtual void GetInts(int a_MinX, int a_MinZ, typename super::Values & a_Values) override
+	{
+		// Generate the underlying data:
+		m_Biomes->GetInts(a_MinX, a_MinZ, a_Values);
+		typename super::Values riverData;
+		m_Rivers->GetInts(a_MinX, a_MinZ, riverData);
+
+		// Mix the values:
+		for (int z = 0; z < SizeZ; z++)
+		{
+			int idxZ = z * SizeX;
+			for (int x = 0; x < SizeX; x++)
+			{
+				int idx = x + idxZ;
+				if (IsBiomeOcean(a_Values[idx]))
+				{
+					// Oceans are kept without any changes
+					continue;
+				}
+				if (riverData[idx] != biRiver)
+				{
+					// There's no river, keep the current value
+					continue;
+				}
+
+				// There's a river, change the output to a river or a frozen river, based on the original biome:
+				if (IsBiomeVeryCold((EMCSBiome)a_Values[idx]))
+				{
+					a_Values[idx] = biFrozenRiver;
+				}
+				else
+				{
+					a_Values[idx] = biRiver;
+				}
+			}  // for x
+		}  // for z
+	}
+
+protected:
+	Underlying m_Biomes;
+	Underlying m_Rivers;
+};
+
+
+
+
+
+/** Generates a river based on the underlying data.
+This is basically an edge detector over the underlying data. The rivers are the edges where the underlying data
+changes from one pixel to its neighbor. */
+template <int SizeX, int SizeZ = SizeX>
+class cIntGenRiver:
+	public cIntGenWithNoise<SizeX, SizeZ>
+{
+	typedef cIntGenWithNoise<SizeX, SizeZ> super;
+	static const int UnderlyingSizeX = SizeX + 2;
+	static const int UnderlyingSizeZ = SizeZ + 2;
+
+public:
+	typedef std::shared_ptr<cIntGen<UnderlyingSizeX, UnderlyingSizeZ>> Underlying;
+
+
+	cIntGenRiver(int a_Seed, Underlying a_Underlying):
+		super(a_Seed),
+		m_Underlying(a_Underlying)
+	{
+	}
+
+
+	virtual void GetInts(int a_MinX, int a_MinZ, typename super::Values & a_Values) override
+	{
+		// Generate the underlying data:
+		int Cache[UnderlyingSizeX * UnderlyingSizeZ];
+		m_Underlying->GetInts(a_MinX - 1, a_MinZ - 1, Cache);
+
+		// Detect the edges:
+		for (int z = 0; z < SizeZ; z++)
+		{
+			for (int x = 0; x < SizeX; x++)
+			{
+				int Above = Cache[x + 1 + z * UnderlyingSizeX];
+				int Below = Cache[x + 1 + (z + 2) * UnderlyingSizeX];
+				int Left  = Cache[x +     (z + 1) * UnderlyingSizeX];
+				int Right = Cache[x + 2 + (z + 1) * UnderlyingSizeX];
+				int val   = Cache[x + 1 + (z + 1) * UnderlyingSizeX];
+
+				if ((val == Above) && (val == Below) && (val == Left) && (val == Right))
+				{
+					val = 0;
+				}
+				else
+				{
+					val = biRiver;
+				}
+				a_Values[x + z * SizeX] = val;
+			}  // for x
+		}  // for z
+	}
+
+protected:
+	Underlying m_Underlying;
+};
+
+
+
+
+
+/** Turns some of the oceans into the specified biome. Used for mushroom and deep ocean.
+The biome is only placed if at least 3 of its neighbors are ocean and only with the specified chance. */
+template <int SizeX, int SizeZ = SizeX>
+class cIntGenAddToOcean:
+	public cIntGenWithNoise<SizeX, SizeZ>
+{
+	typedef cIntGenWithNoise<SizeX, SizeZ> super;
+	static const int UnderlyingSizeX = SizeX + 2;
+	static const int UnderlyingSizeZ = SizeZ + 2;
+
+public:
+	typedef std::shared_ptr<cIntGen<UnderlyingSizeX, UnderlyingSizeZ>> Underlying;
+
+
+	cIntGenAddToOcean(int a_Seed, int a_Chance, int a_ToValue, Underlying a_Underlying):
+		super(a_Seed),
+		m_Chance(a_Chance),
+		m_ToValue(a_ToValue),
+		m_Underlying(a_Underlying)
+	{
+	}
+
+
+	virtual void GetInts(int a_MinX, int a_MinZ, typename super::Values & a_Values) override
+	{
+		// Generate the underlying data:
+		int Cache[UnderlyingSizeX * UnderlyingSizeZ];
+		m_Underlying->GetInts(a_MinX - 1, a_MinZ - 1, Cache);
+
+		// Add the mushroom islands:
+		for (int z = 0; z < SizeZ; z++)
+		{
+			for (int x = 0; x < SizeX; x++)
+			{
+				int val = Cache[x + 1 + (z + 1) * UnderlyingSizeX];
+				if (!IsBiomeOcean(val))
+				{
+					a_Values[x + z * SizeX] = val;
+					continue;
+				}
+
+				// Count the ocean neighbors:
+				int Above = Cache[x + 1 + z * UnderlyingSizeX];
+				int Below = Cache[x + 1 + (z + 2) * UnderlyingSizeX];
+				int Left  = Cache[x +     (z + 1) * UnderlyingSizeX];
+				int Right = Cache[x + 2 + (z + 1) * UnderlyingSizeX];
+				int NumOceanNeighbors = 0;
+				if (IsBiomeOcean(Above))
+				{
+					NumOceanNeighbors += 1;
+				}
+				if (IsBiomeOcean(Below))
+				{
+					NumOceanNeighbors += 1;
+				}
+				if (IsBiomeOcean(Left))
+				{
+					NumOceanNeighbors += 1;
+				}
+				if (IsBiomeOcean(Right))
+				{
+					NumOceanNeighbors += 1;
+				}
+
+				// If at least 3 ocean neighbors and the chance is right, change:
+				if (
+					(NumOceanNeighbors >= 3) &&
+					((super::m_Noise.IntNoise2DInt(x + a_MinX, z + a_MinZ) / 7) % 1000 < m_Chance)
+				)
+				{
+					a_Values[x + z * SizeX] = m_ToValue;
+				}
+				else
+				{
+					a_Values[x + z * SizeX] = val;
+				}
+			}  // for x
+		}  // for z
+	}
+
+protected:
+	/** Chance, in permille, of changing the biome. */
+	int m_Chance;
+
+	/** The value to change the ocean into. */
+	int m_ToValue;
+
+	Underlying m_Underlying;
+};
+
+
+
+
+
+/** Changes random pixels of the underlying data to the specified value. */
+template <int SizeX, int SizeZ = SizeX>
+class cIntGenSetRandomly :
+	public cIntGenWithNoise<SizeX, SizeZ>
+{
+	typedef cIntGenWithNoise<SizeX, SizeZ> super;
+
+public:
+	typedef std::shared_ptr<cIntGen<SizeX, SizeZ>> Underlying;
+
+	cIntGenSetRandomly(int a_Seed, int a_Chance, int a_ToValue, Underlying a_Underlying) :
+		super(a_Seed),
+		m_Chance(a_Chance),
+		m_ToValue(a_ToValue),
+		m_Underlying(a_Underlying)
+	{
+	}
+
+
+	virtual void GetInts(int a_MinX, int a_MinZ, typename super::Values & a_Values) override
+	{
+		// Generate the underlying data:
+		m_Underlying->GetInts(a_MinX, a_MinZ, a_Values);
+
+		// Change random pixels to bgOcean:
+		for (int z = 0; z < SizeZ; z++)
+		{
+			for (int x = 0; x < SizeX; x++)
+			{
+				int rnd = super::m_Noise.IntNoise2DInt(x + a_MinX, z + a_MinZ) / 7;
+				if (rnd % 1000 < m_Chance)
+				{
+					a_Values[x + z * SizeX] = m_ToValue;
+				}
+			}
+		}
+	}
+
+protected:
+	/** Chance, in permille, of changing each pixel. */
+	int m_Chance;
+
+	/** The value to which to set the pixel. */
+	int m_ToValue;
+
+	Underlying m_Underlying;
+};
+
+
+
+
+
+
+/** Adds a "rare" flag to random biome groups, based on the given chance. */
+template <int SizeX, int SizeZ = SizeX>
+class cIntGenRareBiomeGroups:
+	public cIntGenWithNoise<SizeX, SizeZ>
+{
+	typedef cIntGenWithNoise<SizeX, SizeZ> super;
+
+public:
+	typedef std::shared_ptr<cIntGen<SizeX, SizeZ>> Underlying;
+
+
+	cIntGenRareBiomeGroups(int a_Seed, int a_Chance, Underlying a_Underlying):
+		super(a_Seed),
+		m_Chance(a_Chance),
+		m_Underlying(a_Underlying)
+	{
+	}
+
+
+	virtual void GetInts(int a_MinX, int a_MinZ, typename super::Values & a_Values) override
+	{
+		// Generate the underlying data:
+		m_Underlying->GetInts(a_MinX, a_MinZ, a_Values);
+
+		// Change some of the biome groups into rare biome groups:
+		for (int z = 0; z < SizeZ; z++)
+		{
+			for (int x = 0; x < SizeX; x++)
+			{
+				int rnd = super::m_Noise.IntNoise2DInt(x + a_MinX, z + a_MinZ) / 7;
+				if (rnd % 1000 < m_Chance)
+				{
+					int idx = x + SizeX * z;
+					a_Values[idx] = a_Values[idx] | bgfRare;
+				}
+			}
+		}
+	}
+
+protected:
+	/** Chance, in permille, of changing each pixel into the rare biome group. */
+	int m_Chance;
+
+	/** The underlying generator. */
+	Underlying m_Underlying;
+};
+
+
+
+
+
+/** Changes biomes in the parent data into an alternate versions (usually "hill" variants), in such places
+that have their alterations set. */
+template <int SizeX, int SizeZ = SizeX>
+class cIntGenAlternateBiomes:
+	public cIntGenWithNoise<SizeX, SizeZ>
+{
+	typedef cIntGenWithNoise<SizeX, SizeZ> super;
+
+public:
+	typedef std::shared_ptr<cIntGen<SizeX, SizeZ>> Underlying;
+
+
+	cIntGenAlternateBiomes(int a_Seed, Underlying a_Alterations, Underlying a_BaseBiomes):
+		super(a_Seed),
+		m_Alterations(a_Alterations),
+		m_BaseBiomes(a_BaseBiomes)
+	{
+	}
+
+
+	virtual void GetInts(int a_MinX, int a_MinZ, typename super::Values & a_Values) override
+	{
+		// Generate the base biomes and the alterations:
+		m_BaseBiomes->GetInts(a_MinX, a_MinZ, a_Values);
+		typename super::Values alterations;
+		m_Alterations->GetInts(a_MinX, a_MinZ, alterations);
+
+		// Change the biomes into their alternate versions:
+		for (int idx = 0; idx < SizeX * SizeZ; ++idx)
+		{
+			if (alterations[idx] == 0)
+			{
+				// No change
+				continue;
+			}
+
+			// Change to alternate biomes:
+			int val = a_Values[idx];
+			switch (val)
+			{
+				case biBirchForest:   val = biBirchForestHills; break;
+				case biDesert:        val = biDesertHills;      break;
+				case biExtremeHills:  val = biExtremeHillsPlus; break;
+				case biForest:        val = biForestHills;      break;
+				case biIcePlains:     val = biIceMountains;     break;
+				case biJungle:        val = biJungleHills;      break;
+				case biMegaTaiga:     val = biMegaTaigaHills;   break;
+				case biMesaPlateau:   val = biMesa;             break;
+				case biMesaPlateauF:  val = biMesa;             break;
+				case biMesaPlateauM:  val = biMesa;             break;
+				case biMesaPlateauFM: val = biMesa;             break;
+				case biPlains:        val = biForest;           break;
+				case biRoofedForest:  val = biPlains;           break;
+				case biSavanna:       val = biSavannaPlateau;   break;
+				case biTaiga:         val = biTaigaHills;       break;
+			}
+			a_Values[idx] = val;
+		}  // for idx - a_Values[]
+	}
+
+protected:
+	Underlying m_Alterations;
+	Underlying m_BaseBiomes;
+};
+
+
+
+
+
+/** Adds an edge between two specifically incompatible biomes, such as mesa and forest. */
+template <int SizeX, int SizeZ = SizeX>
+class cIntGenBiomeEdges:
+	public cIntGenWithNoise<SizeX, SizeZ>
+{
+	typedef cIntGenWithNoise<SizeX, SizeZ> super;
+	static const int m_LowerSizeX = SizeX + 2;
+	static const int m_LowerSizeZ = SizeZ + 2;
+
+public:
+	typedef std::shared_ptr<cIntGen<m_LowerSizeX, m_LowerSizeZ>> Underlying;
+
+
+	cIntGenBiomeEdges(int a_Seed, Underlying a_Underlying):
+		super(a_Seed),
+		m_Underlying(a_Underlying)
+	{
+	}
+
+
+	virtual void GetInts(int a_MinX, int a_MinZ, typename super::Values & a_Values) override
+	{
+		// Generate the underlying biomes:
+		typename Underlying::element_type::Values lowerValues;
+		m_Underlying->GetInts(a_MinX - 1, a_MinZ - 1, lowerValues);
+
+		// Convert incompatible edges into neutral biomes:
+		for (int z = 0; z < SizeZ; z++)
+		{
+			for (int x = 0; x < SizeX; x++)
+			{
+				int biome = lowerValues[x + 1 + (z + 1) * m_LowerSizeX];
+				int above = lowerValues[x + 1 + z *       m_LowerSizeX];
+				int below = lowerValues[x + 1 + (z + 2) * m_LowerSizeX];
+				int left  = lowerValues[x +     (z + 1) * m_LowerSizeX];
+				int right = lowerValues[x + 2 + (z + 1) * m_LowerSizeX];
+
+				switch (biome)
+				{
+					case biDesert:
+					case biDesertM:
+					case biDesertHills:
+					{
+						if (
+							IsBiomeVeryCold(static_cast<EMCSBiome>(above)) ||
+							IsBiomeVeryCold(static_cast<EMCSBiome>(below)) ||
+							IsBiomeVeryCold(static_cast<EMCSBiome>(left))  ||
+							IsBiomeVeryCold(static_cast<EMCSBiome>(right))
+						)
+						{
+							biome = biPlains;
+						}
+						break;
+					}  // case biDesert
+
+					case biMesaPlateau:
+					case biMesaPlateauF:
+					case biMesaPlateauFM:
+					case biMesaPlateauM:
+					{
+						if (
+							!isMesaCompatible(above) ||
+							!isMesaCompatible(below) ||
+							!isMesaCompatible(left)  ||
+							!isMesaCompatible(right)
+						)
+						{
+							biome = biDesert;
+						}
+						break;
+					}  // Mesa biomes
+
+					case biJungle:
+					case biJungleM:
+					{
+						if (
+							!isJungleCompatible(above) ||
+							!isJungleCompatible(below) ||
+							!isJungleCompatible(left)  ||
+							!isJungleCompatible(right)
+						)
+						{
+							biome = (biome == biJungle) ? biJungleEdge : biJungleEdgeM;
+						}
+						break;
+					}  // Jungle biomes
+
+					case biSwampland:
+					case biSwamplandM:
+					{
+						if (
+							IsBiomeNoDownfall(static_cast<EMCSBiome>(above)) ||
+							IsBiomeNoDownfall(static_cast<EMCSBiome>(below)) ||
+							IsBiomeNoDownfall(static_cast<EMCSBiome>(left))  ||
+							IsBiomeNoDownfall(static_cast<EMCSBiome>(right))
+						)
+						{
+							biome = biPlains;
+						}
+						break;
+					}  // Swampland biomes
+				}  // switch (biome)
+
+				a_Values[x + z * SizeX] = biome;
+			}  // for x
+		}  // for z
+	}
+
+
+protected:
+	Underlying m_Underlying;
+
+
+	bool isMesaCompatible(int a_Biome)
+	{
+		switch (a_Biome)
+		{
+			case biDesert:
+			case biMesa:
+			case biMesaBryce:
+			case biMesaPlateau:
+			case biMesaPlateauF:
+			case biMesaPlateauFM:
+			case biMesaPlateauM:
+			case biOcean:
+			case biDeepOcean:
+			{
+				return true;
+			}
+			default:
+			{
+				return false;
+			}
+		}
+	}
+
+
+	bool isJungleCompatible(int a_Biome)
+	{
+		switch (a_Biome)
+		{
+			case biJungle:
+			case biJungleM:
+			case biJungleEdge:
+			case biJungleEdgeM:
+			case biJungleHills:
+			{
+				return true;
+			}
+			default:
+			{
+				return false;
+			}
+		}
+	}
+};
+
+
+
+
+
+/** Changes biomes in the parent data into their alternate versions ("M" variants), in such places that
+have their alterations set. */
+template <int SizeX, int SizeZ = SizeX>
+class cIntGenMBiomes:
+	public cIntGenWithNoise<SizeX, SizeZ>
+{
+	typedef cIntGenWithNoise<SizeX, SizeZ> super;
+
+public:
+	typedef std::shared_ptr<cIntGen<SizeX, SizeZ>> Underlying;
+
+
+	cIntGenMBiomes(int a_Seed, Underlying a_Alteration, Underlying a_Underlying):
+		super(a_Seed),
+		m_Underlying(a_Underlying),
+		m_Alteration(a_Alteration)
+	{
+	}
+
+
+	virtual void GetInts(int a_MinX, int a_MinZ, typename super::Values & a_Values) override
+	{
+		// Generate the underlying biomes and the alterations:
+		m_Underlying->GetInts(a_MinX, a_MinZ, a_Values);
+		typename super::Values alterations;
+		m_Alteration->GetInts(a_MinX, a_MinZ, alterations);
+
+		// Wherever alterations are nonzero, change into alternate biome, if available:
+		for (int idx = 0; idx < SizeX * SizeZ; ++idx)
+		{
+			if (alterations[idx] == 0)
+			{
+				continue;
+			}
+
+			// Ice spikes biome was removed from here, because it was generated way too often
+			switch (a_Values[idx])
+			{
+				case biPlains:               a_Values[idx] = biSunflowerPlains;      break;
+				case biDesert:               a_Values[idx] = biDesertM;              break;
+				case biExtremeHills:         a_Values[idx] = biExtremeHillsM;        break;
+				case biForest:               a_Values[idx] = biFlowerForest;         break;
+				case biTaiga:                a_Values[idx] = biTaigaM;               break;
+				case biSwampland:            a_Values[idx] = biSwamplandM;           break;
+				case biJungle:               a_Values[idx] = biJungleM;              break;
+				case biJungleEdge:           a_Values[idx] = biJungleEdgeM;          break;
+				case biBirchForest:          a_Values[idx] = biBirchForestM;         break;
+				case biBirchForestHills:     a_Values[idx] = biBirchForestHillsM;    break;
+				case biRoofedForest:         a_Values[idx] = biRoofedForestM;        break;
+				case biColdTaiga:            a_Values[idx] = biColdTaigaM;           break;
+				case biMegaSpruceTaiga:      a_Values[idx] = biMegaSpruceTaiga;      break;
+				case biMegaSpruceTaigaHills: a_Values[idx] = biMegaSpruceTaigaHills; break;
+				case biExtremeHillsPlus:     a_Values[idx] = biExtremeHillsPlusM;    break;
+				case biSavanna:              a_Values[idx] = biSavannaM;             break;
+				case biSavannaPlateau:       a_Values[idx] = biSavannaPlateauM;      break;
+				case biMesa:                 a_Values[idx] = biMesaBryce;            break;
+				case biMesaPlateauF:         a_Values[idx] = biMesaPlateauFM;        break;
+				case biMesaPlateau:          a_Values[idx] = biMesaBryce;            break;
+			}
+		}  // for idx - a_Values[] / alterations[]
+	}
+
+protected:
+	Underlying m_Underlying;
+	Underlying m_Alteration;
+};
+
+
+
+
diff --git a/src/Generating/MineShafts.cpp b/src/Generating/MineShafts.cpp
index 55b3b64dd..65588ce4b 100644
--- a/src/Generating/MineShafts.cpp
+++ b/src/Generating/MineShafts.cpp
@@ -20,6 +20,7 @@ in a depth-first processing. Each of the descendants will branch randomly, if no
 #include "MineShafts.h"
 #include "../Cuboid.h"
 #include "../BlockEntities/ChestEntity.h"
+#include "../BlockEntities/MobSpawnerEntity.h"
 
 
 
@@ -875,7 +876,9 @@ void cMineShaftCorridor::PlaceSpawner(cChunkDesc & a_ChunkDesc)
 	)
 	{
 		a_ChunkDesc.SetBlockTypeMeta(SpawnerRelX, m_BoundingBox.p1.y + 1, SpawnerRelZ, E_BLOCK_MOB_SPAWNER, 0);
-		// TODO: The spawner needs its accompanying cMobSpawnerEntity, when implemented
+		cMobSpawnerEntity * MobSpawner = static_cast<cMobSpawnerEntity *>(a_ChunkDesc.GetBlockEntity(SpawnerRelX, m_BoundingBox.p1.y + 1, SpawnerRelZ));
+		ASSERT((MobSpawner != nullptr) && (MobSpawner->GetBlockType() == E_BLOCK_MOB_SPAWNER));
+		MobSpawner->SetEntity(mtCaveSpider);
 	}
 }
 
diff --git a/src/Generating/MineShafts.h b/src/Generating/MineShafts.h
index 2850db571..efb11cfee 100644
--- a/src/Generating/MineShafts.h
+++ b/src/Generating/MineShafts.h
@@ -10,7 +10,6 @@
 #pragma once
 
 #include "GridStructGen.h"
-#include "../Noise.h"
 
 
 
diff --git a/src/Generating/Noise3DGenerator.cpp b/src/Generating/Noise3DGenerator.cpp
index 5a4cb44cf..b43a1a6de 100644
--- a/src/Generating/Noise3DGenerator.cpp
+++ b/src/Generating/Noise3DGenerator.cpp
@@ -61,80 +61,110 @@ public:
 
 
 
-////////////////////////////////////////////////////////////////////////////////
-// cNoise3DGenerator:
-
-cNoise3DGenerator::cNoise3DGenerator(cChunkGenerator & a_ChunkGenerator) :
-	super(a_ChunkGenerator),
-	m_Perlin(1000),
-	m_Cubic(1000)
+#if 0
+// Perform speed test of the cInterpolNoise class
+static class cInterpolNoiseSpeedTest
 {
-	m_Perlin.AddOctave(1, (NOISE_DATATYPE)0.5);
-	m_Perlin.AddOctave((NOISE_DATATYPE)0.5, 1);
-	m_Perlin.AddOctave((NOISE_DATATYPE)0.5, 2);
-
-	#if 0
-	// DEBUG: Test the noise generation:
-	// NOTE: In order to be able to run MCS with this code, you need to increase the default thread stack size
-	// In MSVC, it is done in Project Settings -> Configuration Properties -> Linker -> System, set Stack reserve size to at least 64M
-	m_SeaLevel            = 62;
-	m_HeightAmplification = 0;
-	m_MidPoint            = 75;
-	m_FrequencyX          = 4;
-	m_FrequencyY          = 4;
-	m_FrequencyZ          = 4;
-	m_AirThreshold        = 0.5;
-
-	const int NumChunks = 4;
-	NOISE_DATATYPE Noise[NumChunks][cChunkDef::Width * cChunkDef::Width * cChunkDef::Height];
-	for (int x = 0; x < NumChunks; x++)
+public:
+	cInterpolNoiseSpeedTest(void)
 	{
-		GenerateNoiseArray(x, 5, Noise[x]);
+		TestSpeed2D();
+		TestSpeed3D();
+		printf("InterpolNoise speed comparison finished.\n");
 	}
 
-	// Save in XY cuts:
-	cFile f1;
-	if (f1.Open("Test_XY.grab", cFile::fmWrite))
+
+	/** Compare the speed of the 3D InterpolNoise vs 3D CubicNoise. */
+	void TestSpeed3D(void)
 	{
-		for (int z = 0; z < cChunkDef::Width; z++)
+		printf("Evaluating 3D noise performance...\n");
+		static const int SIZE_X = 128;
+		static const int SIZE_Y = 128;
+		static const int SIZE_Z = 128;
+		static const NOISE_DATATYPE MUL = 80;
+		std::unique_ptr<NOISE_DATATYPE[]> arr(new NOISE_DATATYPE[SIZE_X * SIZE_Y * SIZE_Z]);
+		cTimer timer;
+
+		// Test the cInterpolNoise:
+		cInterpolNoise<Interp5Deg> interpNoise(1);
+		long long start = timer.GetNowTime();
+		for (int i = 0; i < 30; i++)
 		{
-			for (int y = 0; y < cChunkDef::Height; y++)
-			{
-				for (int i = 0; i < NumChunks; i++)
-				{
-					int idx = y * cChunkDef::Width + z * cChunkDef::Width * cChunkDef::Height;
-					unsigned char buf[cChunkDef::Width];
-					for (int x = 0; x < cChunkDef::Width; x++)
-					{
-						buf[x] = (unsigned char)(std::min(256, std::max(0, (int)(128 + 32 * Noise[i][idx++]))));
-					}
-					f1.Write(buf, cChunkDef::Width);
-				}
-			}  // for y
-		}  // for z
-	}  // if (XY file open)
+			interpNoise.Generate3D(arr.get(), SIZE_X, SIZE_Y, SIZE_Z, MUL * i, MUL * i + MUL, 0, MUL, 0, MUL);
+		}
+		long long end = timer.GetNowTime();
+		printf("InterpolNoise took %.02f sec\n", static_cast<float>(end - start) / 1000);
+
+		// Test the cCubicNoise:
+		cCubicNoise cubicNoise(1);
+		start = timer.GetNowTime();
+		for (int i = 0; i < 30; i++)
+		{
+			cubicNoise.Generate3D(arr.get(), SIZE_X, SIZE_Y, SIZE_Z, MUL * i, MUL * i + MUL, 0, MUL, 0, MUL);
+		}
+		end = timer.GetNowTime();
+		printf("CubicNoise took %.02f sec\n", static_cast<float>(end - start) / 1000);
+		printf("3D noise performance comparison finished.\n");
+	}
+
 
-	cFile f2;
-	if (f2.Open("Test_XZ.grab", cFile::fmWrite))
+	/** Compare the speed of the 2D InterpolNoise vs 2D CubicNoise. */
+	void TestSpeed2D(void)
 	{
-		for (int y = 0; y < cChunkDef::Height; y++)
+		printf("Evaluating 2D noise performance...\n");
+		static const int SIZE_X = 128;
+		static const int SIZE_Y = 128;
+		static const NOISE_DATATYPE MUL = 80;
+		std::unique_ptr<NOISE_DATATYPE[]> arr(new NOISE_DATATYPE[SIZE_X * SIZE_Y]);
+		cTimer timer;
+
+		// Test the cInterpolNoise:
+		cInterpolNoise<Interp5Deg> interpNoise(1);
+		long long start = timer.GetNowTime();
+		for (int i = 0; i < 500; i++)
 		{
-			for (int z = 0; z < cChunkDef::Width; z++)
-			{
-				for (int i = 0; i < NumChunks; i++)
-				{
-					int idx = y * cChunkDef::Width + z * cChunkDef::Width * cChunkDef::Height;
-					unsigned char buf[cChunkDef::Width];
-					for (int x = 0; x < cChunkDef::Width; x++)
-					{
-						buf[x] = (unsigned char)(std::min(256, std::max(0, (int)(128 + 32 * Noise[i][idx++]))));
-					}
-					f2.Write(buf, cChunkDef::Width);
-				}
-			}  // for z
-		}  // for y
-	}  // if (XZ file open)
-	#endif  // 0
+			interpNoise.Generate2D(arr.get(), SIZE_X, SIZE_Y, MUL * i, MUL * i + MUL, 0, MUL);
+		}
+		long long end = timer.GetNowTime();
+		printf("InterpolNoise took %.02f sec\n", static_cast<float>(end - start) / 1000);
+
+		// Test the cCubicNoise:
+		cCubicNoise cubicNoise(1);
+		start = timer.GetNowTime();
+		for (int i = 0; i < 500; i++)
+		{
+			cubicNoise.Generate2D(arr.get(), SIZE_X, SIZE_Y, MUL * i, MUL * i + MUL, 0, MUL);
+		}
+		end = timer.GetNowTime();
+		printf("CubicNoise took %.02f sec\n", static_cast<float>(end - start) / 1000);
+		printf("2D noise performance comparison finished.\n");
+	}
+} g_InterpolNoiseSpeedTest;
+#endif
+
+
+
+
+
+////////////////////////////////////////////////////////////////////////////////
+// cNoise3DGenerator:
+
+cNoise3DGenerator::cNoise3DGenerator(cChunkGenerator & a_ChunkGenerator) :
+	super(a_ChunkGenerator),
+	m_Perlin(1000),
+	m_Cubic(1000)
+{
+	m_Perlin.AddOctave(1,  1);
+	m_Perlin.AddOctave(2,  0.5);
+	m_Perlin.AddOctave(4,  0.25);
+	m_Perlin.AddOctave(8,  0.125);
+	m_Perlin.AddOctave(16, 0.0625);
+
+	m_Cubic.AddOctave(1,  1);
+	m_Cubic.AddOctave(2,  0.5);
+	m_Cubic.AddOctave(4,  0.25);
+	m_Cubic.AddOctave(8,  0.125);
+	m_Cubic.AddOctave(16, 0.0625);
 }
 
 
@@ -153,9 +183,9 @@ cNoise3DGenerator::~cNoise3DGenerator()
 void cNoise3DGenerator::Initialize(cIniFile & a_IniFile)
 {
 	// Params:
-	m_SeaLevel            =                 a_IniFile.GetValueSetI("Generator", "Noise3DSeaLevel", 62);
-	m_HeightAmplification = (NOISE_DATATYPE)a_IniFile.GetValueSetF("Generator", "Noise3DHeightAmplification", 0);
-	m_MidPoint            = (NOISE_DATATYPE)a_IniFile.GetValueSetF("Generator", "Noise3DMidPoint", 75);
+	m_SeaLevel            =                 a_IniFile.GetValueSetI("Generator", "SeaLevel", 62);
+	m_HeightAmplification = (NOISE_DATATYPE)a_IniFile.GetValueSetF("Generator", "Noise3DHeightAmplification", 0.1);
+	m_MidPoint            = (NOISE_DATATYPE)a_IniFile.GetValueSetF("Generator", "Noise3DMidPoint", 68);
 	m_FrequencyX          = (NOISE_DATATYPE)a_IniFile.GetValueSetF("Generator", "Noise3DFrequencyX", 8);
 	m_FrequencyY          = (NOISE_DATATYPE)a_IniFile.GetValueSetF("Generator", "Noise3DFrequencyY", 8);
 	m_FrequencyZ          = (NOISE_DATATYPE)a_IniFile.GetValueSetF("Generator", "Noise3DFrequencyZ", 8);
@@ -220,10 +250,10 @@ void cNoise3DGenerator::GenerateNoiseArray(int a_ChunkX, int a_ChunkZ, NOISE_DAT
 	NOISE_DATATYPE NoiseW[DIM_X * DIM_Y * DIM_Z];  // Workspace that the noise calculation can use and trash
 
 	// Our noise array has different layout, XZY, instead of regular chunk's XYZ, that's why the coords are "renamed"
-	NOISE_DATATYPE StartX = ((NOISE_DATATYPE)(a_ChunkX       * cChunkDef::Width))     / m_FrequencyX;
-	NOISE_DATATYPE EndX   = ((NOISE_DATATYPE)((a_ChunkX + 1) * cChunkDef::Width) - 1) / m_FrequencyX;
-	NOISE_DATATYPE StartZ = ((NOISE_DATATYPE)(a_ChunkZ       * cChunkDef::Width))     / m_FrequencyZ;
-	NOISE_DATATYPE EndZ   = ((NOISE_DATATYPE)((a_ChunkZ + 1) * cChunkDef::Width) - 1) / m_FrequencyZ;
+	NOISE_DATATYPE StartX = ((NOISE_DATATYPE)(a_ChunkX       * cChunkDef::Width)) / m_FrequencyX;
+	NOISE_DATATYPE EndX   = ((NOISE_DATATYPE)((a_ChunkX + 1) * cChunkDef::Width)) / m_FrequencyX;
+	NOISE_DATATYPE StartZ = ((NOISE_DATATYPE)(a_ChunkZ       * cChunkDef::Width)) / m_FrequencyZ;
+	NOISE_DATATYPE EndZ   = ((NOISE_DATATYPE)((a_ChunkZ + 1) * cChunkDef::Width)) / m_FrequencyZ;
 	NOISE_DATATYPE StartY = 0;
 	NOISE_DATATYPE EndY   = ((NOISE_DATATYPE)256) / m_FrequencyY;
 
@@ -233,23 +263,23 @@ void cNoise3DGenerator::GenerateNoiseArray(int a_ChunkX, int a_ChunkZ, NOISE_DAT
 
 	// Precalculate a "height" array:
 	NOISE_DATATYPE Height[DIM_X * DIM_Z];  // Output for the cubic noise heightmap ("source")
-	m_Cubic.Generate2D(Height, DIM_X, DIM_Z, StartX / 25, EndX / 25, StartZ / 25, EndZ / 25);
+	m_Cubic.Generate2D(Height, DIM_X, DIM_Z, StartX / 5, EndX / 5, StartZ / 5, EndZ / 5);
 	for (size_t i = 0; i < ARRAYCOUNT(Height); i++)
 	{
-		Height[i] = std::abs(Height[i]) * m_HeightAmplification + 1;
+		Height[i] = Height[i] * m_HeightAmplification;
 	}
 
 	// Modify the noise by height data:
 	for (int y = 0; y < DIM_Y; y++)
 	{
-		NOISE_DATATYPE AddHeight = (y * UPSCALE_Y - m_MidPoint) / 20;
-		AddHeight *= AddHeight * AddHeight;
+		NOISE_DATATYPE AddHeight = (y * UPSCALE_Y - m_MidPoint) / 30;
+		// AddHeight *= AddHeight * AddHeight;
 		for (int z = 0; z < DIM_Z; z++)
 		{
 			NOISE_DATATYPE * CurRow = &(NoiseO[y * DIM_X + z * DIM_X * DIM_Y]);
 			for (int x = 0; x < DIM_X; x++)
 			{
-				CurRow[x] += AddHeight / Height[x + DIM_X * z];
+				CurRow[x] += AddHeight + Height[x + DIM_X * z];
 			}
 		}
 	}
@@ -346,9 +376,10 @@ void cNoise3DGenerator::ComposeTerrain(cChunkDesc & a_ChunkDesc)
 // cNoise3DComposable:
 
 cNoise3DComposable::cNoise3DComposable(int a_Seed) :
-	m_Noise1(a_Seed + 1000),
-	m_Noise2(a_Seed + 2000),
-	m_Noise3(a_Seed + 3000)
+	m_ChoiceNoise(a_Seed),
+	m_DensityNoiseA(a_Seed + 1),
+	m_DensityNoiseB(a_Seed + 2),
+	m_BaseNoise(a_Seed + 3)
 {
 }
 
@@ -359,13 +390,50 @@ cNoise3DComposable::cNoise3DComposable(int a_Seed) :
 void cNoise3DComposable::Initialize(cIniFile & a_IniFile)
 {
 	// Params:
-	m_SeaLevel            =                 a_IniFile.GetValueSetI("Generator", "Noise3DSeaLevel", 62);
-	m_HeightAmplification = (NOISE_DATATYPE)a_IniFile.GetValueSetF("Generator", "Noise3DHeightAmplification", 0);
+	// The defaults generate extreme hills terrain
+	m_HeightAmplification = (NOISE_DATATYPE)a_IniFile.GetValueSetF("Generator", "Noise3DHeightAmplification", 0.045);
 	m_MidPoint            = (NOISE_DATATYPE)a_IniFile.GetValueSetF("Generator", "Noise3DMidPoint", 75);
-	m_FrequencyX          = (NOISE_DATATYPE)a_IniFile.GetValueSetF("Generator", "Noise3DFrequencyX", 10);
-	m_FrequencyY          = (NOISE_DATATYPE)a_IniFile.GetValueSetF("Generator", "Noise3DFrequencyY", 10);
-	m_FrequencyZ          = (NOISE_DATATYPE)a_IniFile.GetValueSetF("Generator", "Noise3DFrequencyZ", 10);
-	m_AirThreshold        = (NOISE_DATATYPE)a_IniFile.GetValueSetF("Generator", "Noise3DAirThreshold", 0.5);
+	m_FrequencyX          = (NOISE_DATATYPE)a_IniFile.GetValueSetF("Generator", "Noise3DFrequencyX", 40);
+	m_FrequencyY          = (NOISE_DATATYPE)a_IniFile.GetValueSetF("Generator", "Noise3DFrequencyY", 40);
+	m_FrequencyZ          = (NOISE_DATATYPE)a_IniFile.GetValueSetF("Generator", "Noise3DFrequencyZ", 40);
+	m_BaseFrequencyX      = (NOISE_DATATYPE)a_IniFile.GetValueSetF("Generator", "Noise3DBaseFrequencyX", 40);
+	m_BaseFrequencyZ      = (NOISE_DATATYPE)a_IniFile.GetValueSetF("Generator", "Noise3DBaseFrequencyZ", 40);
+	m_ChoiceFrequencyX    = (NOISE_DATATYPE)a_IniFile.GetValueSetF("Generator", "Noise3DChoiceFrequencyX", 40);
+	m_ChoiceFrequencyY    = (NOISE_DATATYPE)a_IniFile.GetValueSetF("Generator", "Noise3DChoiceFrequencyY", 80);
+	m_ChoiceFrequencyZ    = (NOISE_DATATYPE)a_IniFile.GetValueSetF("Generator", "Noise3DChoiceFrequencyZ", 40);
+	m_AirThreshold        = (NOISE_DATATYPE)a_IniFile.GetValueSetF("Generator", "Noise3DAirThreshold", 0);
+	int NumChoiceOctaves  = a_IniFile.GetValueSetI("Generator", "Noise3DNumChoiceOctaves",  4);
+	int NumDensityOctaves = a_IniFile.GetValueSetI("Generator", "Noise3DNumDensityOctaves", 6);
+	int NumBaseOctaves    = a_IniFile.GetValueSetI("Generator", "Noise3DNumBaseOctaves",    6);
+	NOISE_DATATYPE BaseNoiseAmplitude = (NOISE_DATATYPE)a_IniFile.GetValueSetF("Generator", "Noise3DBaseAmplitude", 1);
+
+	// Add octaves for the choice noise:
+	NOISE_DATATYPE wavlen = 1, ampl = 0.5;
+	for (int i = 0; i < NumChoiceOctaves; i++)
+	{
+		m_ChoiceNoise.AddOctave(wavlen, ampl);
+		wavlen = wavlen * 2;
+		ampl = ampl / 2;
+	}
+
+	// Add octaves for the density noises:
+	wavlen = 1, ampl = 1;
+	for (int i = 0; i < NumDensityOctaves; i++)
+	{
+		m_DensityNoiseA.AddOctave(wavlen, ampl);
+		m_DensityNoiseB.AddOctave(wavlen, ampl);
+		wavlen = wavlen * 2;
+		ampl = ampl / 2;
+	}
+
+	// Add octaves for the base noise:
+	wavlen = 1, ampl = BaseNoiseAmplitude;
+	for (int i = 0; i < NumBaseOctaves; i++)
+	{
+		m_BaseNoise.AddOctave(wavlen, ampl);
+		wavlen = wavlen * 2;
+		ampl = ampl / 2;
+	}
 }
 
 
@@ -376,142 +444,266 @@ void cNoise3DComposable::GenerateNoiseArrayIfNeeded(int a_ChunkX, int a_ChunkZ)
 {
 	if ((a_ChunkX == m_LastChunkX) && (a_ChunkZ == m_LastChunkZ))
 	{
-		// The noise for this chunk is already generated in m_Noise
+		// The noise for this chunk is already generated in m_NoiseArray
 		return;
 	}
 	m_LastChunkX = a_ChunkX;
 	m_LastChunkZ = a_ChunkZ;
 
-	// Upscaling parameters:
-	const int UPSCALE_X = 8;
-	const int UPSCALE_Y = 4;
-	const int UPSCALE_Z = 8;
-
-	// Precalculate a "height" array:
-	NOISE_DATATYPE Height[17 * 17];  // x + 17 * z
-	for (int z = 0; z < 17; z += UPSCALE_Z)
+	// Generate all the noises:
+	NOISE_DATATYPE ChoiceNoise[5 * 5 * 33];
+	NOISE_DATATYPE Workspace[5 * 5 * 33];
+	NOISE_DATATYPE DensityNoiseA[5 * 5 * 33];
+	NOISE_DATATYPE DensityNoiseB[5 * 5 * 33];
+	NOISE_DATATYPE BaseNoise[5 * 5];
+	NOISE_DATATYPE BlockX = static_cast<NOISE_DATATYPE>(a_ChunkX * cChunkDef::Width);
+	NOISE_DATATYPE BlockZ = static_cast<NOISE_DATATYPE>(a_ChunkZ * cChunkDef::Width);
+	// Note that we have to swap the X and Y coords, because noise generator uses [x + SizeX * y + SizeX * SizeY * z] ordering and we want "BlockY" to be "x":
+	m_ChoiceNoise.Generate3D  (ChoiceNoise,   33, 5, 5, 0, 257 / m_ChoiceFrequencyY, BlockX / m_ChoiceFrequencyX, (BlockX + 17) / m_ChoiceFrequencyX, BlockZ / m_ChoiceFrequencyZ, (BlockZ + 17) / m_ChoiceFrequencyZ, Workspace);
+	m_DensityNoiseA.Generate3D(DensityNoiseA, 33, 5, 5, 0, 257 / m_FrequencyY,       BlockX / m_FrequencyX,       (BlockX + 17) / m_FrequencyX,       BlockZ / m_FrequencyZ,       (BlockZ + 17) / m_FrequencyZ,       Workspace);
+	m_DensityNoiseB.Generate3D(DensityNoiseB, 33, 5, 5, 0, 257 / m_FrequencyY,       BlockX / m_FrequencyX,       (BlockX + 17) / m_FrequencyX,       BlockZ / m_FrequencyZ,       (BlockZ + 17) / m_FrequencyZ,       Workspace);
+	m_BaseNoise.Generate2D    (BaseNoise,     5, 5,     BlockX / m_BaseFrequencyX,   (BlockX + 17) / m_BaseFrequencyX,   BlockZ / m_FrequencyZ,       (BlockZ + 17) / m_FrequencyZ, Workspace);
+
+	// Calculate the final noise based on the partial noises:
+	for (int z = 0; z < 5; z++)
 	{
-		NOISE_DATATYPE NoiseZ = ((NOISE_DATATYPE)(a_ChunkZ * cChunkDef::Width + z)) / m_FrequencyZ;
-		for (int x = 0; x < 17; x += UPSCALE_X)
+		for (int x = 0; x < 5; x++)
 		{
-			NOISE_DATATYPE NoiseX = ((NOISE_DATATYPE)(a_ChunkX * cChunkDef::Width + x)) / m_FrequencyX;
-			NOISE_DATATYPE val = std::abs(m_Noise1.CubicNoise2D(NoiseX / 5, NoiseZ / 5)) * m_HeightAmplification + 1;
-			Height[x + 17 * z] = val * val * val;
+			NOISE_DATATYPE curBaseNoise = BaseNoise[x + 5 * z];
+			for (int y = 0; y < 33; y++)
+			{
+				NOISE_DATATYPE AddHeight = (static_cast<NOISE_DATATYPE>(y * 8) - m_MidPoint) * m_HeightAmplification;
+
+				// If "underground", make the terrain smoother by forcing the vertical linear gradient into steeper slope:
+				if (AddHeight < 0)
+				{
+					AddHeight *= 4;
+				}
+
+				// If too high, cut off any terrain:
+				if (y > 28)
+				{
+					AddHeight = AddHeight + static_cast<NOISE_DATATYPE>(y - 28) / 4;
+				}
+
+				// Decide between the two density noises:
+				int idx = 33 * x + 33 * 5 * z + y;
+				Workspace[idx] = ClampedLerp(DensityNoiseA[idx], DensityNoiseB[idx], 8 * (ChoiceNoise[idx] + 0.5f)) + AddHeight + curBaseNoise;
+			}
 		}
 	}
+	LinearUpscale3DArray<NOISE_DATATYPE>(Workspace, 33, 5, 5, m_NoiseArray, 8, 4, 4);
+}
+
+
+
+
 
-	for (int y = 0; y < 257; y += UPSCALE_Y)
+void cNoise3DComposable::GenShape(int a_ChunkX, int a_ChunkZ, cChunkDesc::Shape & a_Shape)
+{
+	GenerateNoiseArrayIfNeeded(a_ChunkX, a_ChunkZ);
+
+	// Translate the noise array into Shape:
+	for (int z = 0; z < cChunkDef::Width; z++)
 	{
-		NOISE_DATATYPE NoiseY = ((NOISE_DATATYPE)y) / m_FrequencyY;
-		NOISE_DATATYPE AddHeight = (y - m_MidPoint) / 20;
-		AddHeight *= AddHeight * AddHeight;
-		NOISE_DATATYPE * CurFloor = &(m_NoiseArray[y * 17 * 17]);
-		for (int z = 0; z < 17; z += UPSCALE_Z)
+		for (int x = 0; x < cChunkDef::Width; x++)
 		{
-			NOISE_DATATYPE NoiseZ = ((NOISE_DATATYPE)(a_ChunkZ * cChunkDef::Width + z)) / m_FrequencyZ;
-			for (int x = 0; x < 17; x += UPSCALE_X)
+			for (int y = 0; y < cChunkDef::Height; y++)
 			{
-				NOISE_DATATYPE NoiseX = ((NOISE_DATATYPE)(a_ChunkX * cChunkDef::Width + x)) / m_FrequencyX;
-				CurFloor[x + 17 * z] = (
-					m_Noise1.CubicNoise3D(NoiseX, NoiseY, NoiseZ) * (NOISE_DATATYPE)0.5 +
-					m_Noise2.CubicNoise3D(NoiseX / 2, NoiseY / 2, NoiseZ / 2) +
-					m_Noise3.CubicNoise3D(NoiseX / 4, NoiseY / 4, NoiseZ / 4) * 2 +
-					AddHeight / Height[x + 17 * z]
-				);
+				a_Shape[y + x * 256 + z * 256 * 16] = (m_NoiseArray[y + 257 * x + 257 * 17 * z] > m_AirThreshold) ? 0 : 1;
 			}
-		}
-		// Linear-interpolate this XZ floor:
-		LinearUpscale2DArrayInPlace<17, 17, UPSCALE_X, UPSCALE_Z>(CurFloor);
-	}
+		}  // for x
+	}  // for z
+}
 
-	// Finish the 3D linear interpolation by interpolating between each XZ-floors on the Y axis
-	for (int y = 1; y < cChunkDef::Height; y++)
+
+
+
+
+////////////////////////////////////////////////////////////////////////////////
+// cBiomalNoise3DComposable:
+
+cBiomalNoise3DComposable::cBiomalNoise3DComposable(int a_Seed, cBiomeGenPtr a_BiomeGen) :
+	m_ChoiceNoise(a_Seed),
+	m_DensityNoiseA(a_Seed + 1),
+	m_DensityNoiseB(a_Seed + 2),
+	m_BaseNoise(a_Seed + 3),
+	m_BiomeGen(a_BiomeGen),
+	m_LastChunkX(0x7fffffff),  // Set impossible coords for the chunk so that it's always considered stale
+	m_LastChunkZ(0x7fffffff)
+{
+	// Generate the weight distribution for summing up neighboring biomes:
+	m_WeightSum = 0;
+	for (int z = 0; z <= AVERAGING_SIZE * 2; z++)
 	{
-		if ((y % UPSCALE_Y) == 0)
-		{
-			// This is the interpolation source floor, already calculated
-			continue;
-		}
-		int LoFloorY = (y / UPSCALE_Y) * UPSCALE_Y;
-		int HiFloorY = LoFloorY + UPSCALE_Y;
-		NOISE_DATATYPE * LoFloor  = &(m_NoiseArray[LoFloorY * 17 * 17]);
-		NOISE_DATATYPE * HiFloor  = &(m_NoiseArray[HiFloorY * 17 * 17]);
-		NOISE_DATATYPE * CurFloor = &(m_NoiseArray[y * 17 * 17]);
-		NOISE_DATATYPE Ratio = ((NOISE_DATATYPE)(y % UPSCALE_Y)) / UPSCALE_Y;
-		int idx = 0;
-		for (int z = 0; z < cChunkDef::Width; z++)
+		for (int x = 0; x <= AVERAGING_SIZE * 2; x++)
 		{
-			for (int x = 0; x < cChunkDef::Width; x++)
-			{
-				CurFloor[idx] = LoFloor[idx] + (HiFloor[idx] - LoFloor[idx]) * Ratio;
-				idx += 1;
-			}
-			idx += 1;  // Skipping one X column
+			m_Weight[z][x] = static_cast<NOISE_DATATYPE>((AVERAGING_SIZE - std::abs(AVERAGING_SIZE - x)) + (AVERAGING_SIZE - std::abs(AVERAGING_SIZE - z)));
+			m_WeightSum += m_Weight[z][x];
 		}
 	}
+}
+
+
+
+
 
-	// The noise array is now fully interpolated
-	/*
-	// DEBUG: Output two images of the array, sliced by XY and XZ:
-	cFile f1;
-	if (f1.Open(Printf("Chunk_%d_%d_XY.raw", a_ChunkX, a_ChunkZ), cFile::fmWrite))
+void cBiomalNoise3DComposable::Initialize(cIniFile & a_IniFile)
+{
+	// Params:
+	// The defaults generate extreme hills terrain
+	m_SeaLevel            =                 a_IniFile.GetValueSetI("Generator", "SeaLevel", 62);
+	m_FrequencyX          = (NOISE_DATATYPE)a_IniFile.GetValueSetF("Generator", "BiomalNoise3DFrequencyX", 40);
+	m_FrequencyY          = (NOISE_DATATYPE)a_IniFile.GetValueSetF("Generator", "BiomalNoise3DFrequencyY", 40);
+	m_FrequencyZ          = (NOISE_DATATYPE)a_IniFile.GetValueSetF("Generator", "BiomalNoise3DFrequencyZ", 40);
+	m_BaseFrequencyX      = (NOISE_DATATYPE)a_IniFile.GetValueSetF("Generator", "BiomalNoise3DBaseFrequencyX", 40);
+	m_BaseFrequencyZ      = (NOISE_DATATYPE)a_IniFile.GetValueSetF("Generator", "BiomalNoise3DBaseFrequencyZ", 40);
+	m_ChoiceFrequencyX    = (NOISE_DATATYPE)a_IniFile.GetValueSetF("Generator", "BiomalNoise3DChoiceFrequencyX", 40);
+	m_ChoiceFrequencyY    = (NOISE_DATATYPE)a_IniFile.GetValueSetF("Generator", "BiomalNoise3DChoiceFrequencyY", 80);
+	m_ChoiceFrequencyZ    = (NOISE_DATATYPE)a_IniFile.GetValueSetF("Generator", "BiomalNoise3DChoiceFrequencyZ", 40);
+	m_AirThreshold        = (NOISE_DATATYPE)a_IniFile.GetValueSetF("Generator", "BiomalNoise3DAirThreshold", 0);
+	int NumChoiceOctaves  = a_IniFile.GetValueSetI("Generator", "BiomalNoise3DNumChoiceOctaves",  4);
+	int NumDensityOctaves = a_IniFile.GetValueSetI("Generator", "BiomalNoise3DNumDensityOctaves", 6);
+	int NumBaseOctaves    = a_IniFile.GetValueSetI("Generator", "BiomalNoise3DNumBaseOctaves",    6);
+	NOISE_DATATYPE BaseNoiseAmplitude = (NOISE_DATATYPE)a_IniFile.GetValueSetF("Generator", "BiomalNoise3DBaseAmplitude", 1);
+
+	// Add octaves for the choice noise:
+	NOISE_DATATYPE wavlen = 1, ampl = 0.5;
+	for (int i = 0; i < NumChoiceOctaves; i++)
 	{
-		for (int z = 0; z < cChunkDef::Width; z++)
-		{
-			for (int y = 0; y < cChunkDef::Height; y++)
-			{
-				int idx = y * 17 * 17 + z * 17;
-				unsigned char buf[16];
-				for (int x = 0; x < cChunkDef::Width; x++)
-				{
-					buf[x] = (unsigned char)(std::min(256, std::max(0, (int)(128 + 128 * m_Noise[idx++]))));
-				}
-				f1.Write(buf, 16);
-			}  // for y
-		}  // for z
-	}  // if (XY file open)
+		m_ChoiceNoise.AddOctave(wavlen, ampl);
+		wavlen = wavlen * 2;
+		ampl = ampl / 2;
+	}
 
-	cFile f2;
-	if (f2.Open(Printf("Chunk_%d_%d_XZ.raw", a_ChunkX, a_ChunkZ), cFile::fmWrite))
+	// Add octaves for the density noises:
+	wavlen = 1, ampl = 1;
+	for (int i = 0; i < NumDensityOctaves; i++)
 	{
-		for (int y = 0; y < cChunkDef::Height; y++)
+		m_DensityNoiseA.AddOctave(wavlen, ampl);
+		m_DensityNoiseB.AddOctave(wavlen, ampl);
+		wavlen = wavlen * 2;
+		ampl = ampl / 2;
+	}
+
+	// Add octaves for the base noise:
+	wavlen = 1, ampl = BaseNoiseAmplitude;
+	for (int i = 0; i < NumBaseOctaves; i++)
+	{
+		m_BaseNoise.AddOctave(wavlen, ampl);
+		wavlen = wavlen * 2;
+		ampl = ampl / 2;
+	}
+}
+
+
+
+
+
+void cBiomalNoise3DComposable::GenerateNoiseArrayIfNeeded(int a_ChunkX, int a_ChunkZ)
+{
+	if ((a_ChunkX == m_LastChunkX) && (a_ChunkZ == m_LastChunkZ))
+	{
+		// The noise for this chunk is already generated in m_NoiseArray
+		return;
+	}
+	m_LastChunkX = a_ChunkX;
+	m_LastChunkZ = a_ChunkZ;
+
+	// Calculate the parameters for the biomes:
+	ChunkParam MidPoint;
+	ChunkParam HeightAmp;
+	CalcBiomeParamArrays(a_ChunkX, a_ChunkZ, HeightAmp, MidPoint);
+
+	// Generate all the noises:
+	NOISE_DATATYPE ChoiceNoise[5 * 5 * 33];
+	NOISE_DATATYPE Workspace[5 * 5 * 33];
+	NOISE_DATATYPE DensityNoiseA[5 * 5 * 33];
+	NOISE_DATATYPE DensityNoiseB[5 * 5 * 33];
+	NOISE_DATATYPE BaseNoise[5 * 5];
+	NOISE_DATATYPE BlockX = static_cast<NOISE_DATATYPE>(a_ChunkX * cChunkDef::Width);
+	NOISE_DATATYPE BlockZ = static_cast<NOISE_DATATYPE>(a_ChunkZ * cChunkDef::Width);
+	// Note that we have to swap the X and Y coords, because noise generator uses [x + SizeX * y + SizeX * SizeY * z] ordering and we want "BlockY" to be "x":
+	m_ChoiceNoise.Generate3D  (ChoiceNoise,   33, 5, 5, 0, 257 / m_ChoiceFrequencyY, BlockX / m_ChoiceFrequencyX, (BlockX + 17) / m_ChoiceFrequencyX, BlockZ / m_ChoiceFrequencyZ, (BlockZ + 17) / m_ChoiceFrequencyZ, Workspace);
+	m_DensityNoiseA.Generate3D(DensityNoiseA, 33, 5, 5, 0, 257 / m_FrequencyY,       BlockX / m_FrequencyX,       (BlockX + 17) / m_FrequencyX,       BlockZ / m_FrequencyZ,       (BlockZ + 17) / m_FrequencyZ,       Workspace);
+	m_DensityNoiseB.Generate3D(DensityNoiseB, 33, 5, 5, 0, 257 / m_FrequencyY,       BlockX / m_FrequencyX,       (BlockX + 17) / m_FrequencyX,       BlockZ / m_FrequencyZ,       (BlockZ + 17) / m_FrequencyZ,       Workspace);
+	m_BaseNoise.Generate2D    (BaseNoise,     5, 5,     BlockX / m_BaseFrequencyX,   (BlockX + 17) / m_BaseFrequencyX,   BlockZ / m_FrequencyZ,       (BlockZ + 17) / m_FrequencyZ, Workspace);
+
+	// Calculate the final noise based on the partial noises:
+	for (int z = 0; z < 5; z++)
+	{
+		for (int x = 0; x < 5; x++)
 		{
-			for (int z = 0; z < cChunkDef::Width; z++)
+			NOISE_DATATYPE curMidPoint = MidPoint[x + 5 * z];
+			NOISE_DATATYPE curHeightAmp = HeightAmp[x + 5 * z];
+			NOISE_DATATYPE curBaseNoise = BaseNoise[x + 5 * z];
+			for (int y = 0; y < 33; y++)
 			{
-				int idx = y * 17 * 17 + z * 17;
-				unsigned char buf[16];
-				for (int x = 0; x < cChunkDef::Width; x++)
+				NOISE_DATATYPE AddHeight = (static_cast<NOISE_DATATYPE>(y * 8) - curMidPoint) * curHeightAmp;
+
+				// If "underground", make the terrain smoother by forcing the vertical linear gradient into steeper slope:
+				if (AddHeight < 0)
 				{
-					buf[x] = (unsigned char)(std::min(256, std::max(0, (int)(128 + 128 * m_Noise[idx++]))));
+					AddHeight *= 4;
 				}
-				f2.Write(buf, 16);
-			}  // for z
-		}  // for y
-	}  // if (XZ file open)
-	*/
+				// If too high, cut off any terrain:
+				if (y > 28)
+				{
+					AddHeight = AddHeight + static_cast<NOISE_DATATYPE>(y - 28) / 4;
+				}
+
+				// Decide between the two density noises:
+				int idx = 33 * x + y + 33 * 5 * z;
+				Workspace[idx] = ClampedLerp(DensityNoiseA[idx], DensityNoiseB[idx], 8 * (ChoiceNoise[idx] + 0.5f)) + AddHeight + curBaseNoise;
+			}
+		}
+	}
+	LinearUpscale3DArray<NOISE_DATATYPE>(Workspace, 33, 5, 5, m_NoiseArray, 8, 4, 4);
 }
 
 
 
 
 
-void cNoise3DComposable::GenHeightMap(int a_ChunkX, int a_ChunkZ, cChunkDef::HeightMap & a_HeightMap)
+void cBiomalNoise3DComposable::CalcBiomeParamArrays(int a_ChunkX, int a_ChunkZ, ChunkParam & a_HeightAmp, ChunkParam & a_MidPoint)
 {
-	GenerateNoiseArrayIfNeeded(a_ChunkX, a_ChunkZ);
+	// Generate the 3*3 chunks of biomes around this chunk:
+	cChunkDef::BiomeMap neighborBiomes[3 * 3];
+	for (int z = 0; z < 3; z++)
+	{
+		for (int x = 0; x < 3; x++)
+		{
+			m_BiomeGen->GenBiomes(a_ChunkX + x - 1, a_ChunkZ + z - 1, neighborBiomes[x + 3 * z]);
+		}
+	}
 
-	for (int z = 0; z < cChunkDef::Width; z++)
+	// Sum up the biome values:
+	for (int z = 0; z < 5; z++)
 	{
-		for (int x = 0; x < cChunkDef::Width; x++)
+		for (int x = 0; x < 5; x++)
 		{
-			cChunkDef::SetHeight(a_HeightMap, x, z, m_SeaLevel);
-			for (int y = cChunkDef::Height - 1; y > m_SeaLevel; y--)
+			NOISE_DATATYPE totalHeightAmp = 0;
+			NOISE_DATATYPE totalMidPoint = 0;
+			// Add up the biomes around this point:
+			for (int relz = 0; relz <= AVERAGING_SIZE * 2; ++relz)
 			{
-				if (m_NoiseArray[y * 17 * 17 + z * 17 + x] <= m_AirThreshold)
+				int colz = 16 + z * 4 + relz - AVERAGING_SIZE;   // Biome Z coord relative to the neighborBiomes start
+				int neicellz = colz / 16;	                       // Chunk Z coord relative to the neighborBiomes start
+				int neirelz  = colz % 16;	                       // Biome Z coord relative to cz in neighborBiomes
+				for (int relx = 0; relx <= AVERAGING_SIZE * 2; ++relx)
 				{
-					cChunkDef::SetHeight(a_HeightMap, x, z, y);
-					break;
-				}
-			}  // for y
+					int colx = 16 + x * 4 + relx - AVERAGING_SIZE;   // Biome X coord relative to the neighborBiomes start
+					int neicellx = colx / 16;	                       // Chunk X coord relative to the neighborBiomes start
+					int neirelx  = colx % 16;	                       // Biome X coord relative to cz in neighborBiomes
+					EMCSBiome biome = cChunkDef::GetBiome(neighborBiomes[neicellx + neicellz * 3], neirelx, neirelz);
+					NOISE_DATATYPE heightAmp, midPoint;
+					GetBiomeParams(biome, heightAmp, midPoint);
+					totalHeightAmp += heightAmp * m_Weight[relz][relx];
+					totalMidPoint += midPoint * m_Weight[relz][relx];
+				}  // for relx
+			}  // for relz
+			a_HeightAmp[x + 5 * z] = totalHeightAmp / m_WeightSum;
+			a_MidPoint[x + 5 * z] = totalMidPoint / m_WeightSum;
 		}  // for x
 	}  // for z
 }
@@ -520,52 +712,97 @@ void cNoise3DComposable::GenHeightMap(int a_ChunkX, int a_ChunkZ, cChunkDef::Hei
 
 
 
-void cNoise3DComposable::ComposeTerrain(cChunkDesc & a_ChunkDesc)
+void cBiomalNoise3DComposable::GetBiomeParams(EMCSBiome a_Biome, NOISE_DATATYPE & a_HeightAmp, NOISE_DATATYPE & a_MidPoint)
 {
-	GenerateNoiseArrayIfNeeded(a_ChunkDesc.GetChunkX(), a_ChunkDesc.GetChunkZ());
+	switch (a_Biome)
+	{
+		case biBeach:                a_HeightAmp = 0.2f;   a_MidPoint =  60; break;
+		case biBirchForest:          a_HeightAmp = 0.1f;   a_MidPoint =  64; break;
+		case biBirchForestHills:     a_HeightAmp = 0.075f; a_MidPoint =  68; break;
+		case biBirchForestHillsM:    a_HeightAmp = 0.075f; a_MidPoint =  68; break;
+		case biBirchForestM:         a_HeightAmp = 0.1f;   a_MidPoint =  64; break;
+		case biColdBeach:            a_HeightAmp = 0.3f;   a_MidPoint =  62; break;
+		case biColdTaiga:            a_HeightAmp = 0.1f;   a_MidPoint =  64; break;
+		case biColdTaigaM:           a_HeightAmp = 0.1f;   a_MidPoint =  64; break;
+		case biColdTaigaHills:       a_HeightAmp = 0.075f; a_MidPoint =  68; break;
+		case biDesertHills:          a_HeightAmp = 0.075f; a_MidPoint =  68; break;
+		case biDeepOcean:            a_HeightAmp = 0.17f;  a_MidPoint =  35; break;
+		case biDesert:               a_HeightAmp = 0.29f;  a_MidPoint =  62; break;
+		case biDesertM:              a_HeightAmp = 0.29f;  a_MidPoint =  62; break;
+		case biEnd:                  a_HeightAmp = 0.15f;  a_MidPoint =  64; break;
+		case biExtremeHills:         a_HeightAmp = 0.045f; a_MidPoint =  75; break;
+		case biExtremeHillsEdge:     a_HeightAmp = 0.1f;   a_MidPoint =  70; break;
+		case biExtremeHillsM:        a_HeightAmp = 0.045f; a_MidPoint =  75; break;
+		case biExtremeHillsPlus:     a_HeightAmp = 0.04f;  a_MidPoint =  80; break;
+		case biExtremeHillsPlusM:    a_HeightAmp = 0.04f;  a_MidPoint =  80; break;
+		case biFlowerForest:         a_HeightAmp = 0.1f;   a_MidPoint =  64; break;
+		case biForest:               a_HeightAmp = 0.1f;   a_MidPoint =  64; break;
+		case biForestHills:          a_HeightAmp = 0.075f; a_MidPoint =  68; break;
+		case biFrozenRiver:          a_HeightAmp = 0.4f;   a_MidPoint =  54; break;
+		case biFrozenOcean:          a_HeightAmp = 0.12f;  a_MidPoint =  45; break;
+		case biIceMountains:         a_HeightAmp = 0.075f; a_MidPoint =  68; break;
+		case biIcePlains:            a_HeightAmp = 0.3f;   a_MidPoint =  62; break;
+		case biIcePlainsSpikes:      a_HeightAmp = 0.3f;   a_MidPoint =  62; break;
+		case biJungle:               a_HeightAmp = 0.1f;   a_MidPoint =  63; break;
+		case biJungleEdge:           a_HeightAmp = 0.15f;  a_MidPoint =  62; break;
+		case biJungleEdgeM:          a_HeightAmp = 0.15f;  a_MidPoint =  62; break;
+		case biJungleHills:          a_HeightAmp = 0.075f; a_MidPoint =  68; break;
+		case biJungleM:              a_HeightAmp = 0.1f;   a_MidPoint =  63; break;
+		case biMegaSpruceTaiga:      a_HeightAmp = 0.09f;  a_MidPoint =  64; break;
+		case biMegaSpruceTaigaHills: a_HeightAmp = 0.075f; a_MidPoint =  68; break;
+		case biMegaTaiga:            a_HeightAmp = 0.1f;   a_MidPoint =  64; break;
+		case biMegaTaigaHills:       a_HeightAmp = 0.075f; a_MidPoint =  68; break;
+		case biMesa:                 a_HeightAmp = 0.09f;  a_MidPoint =  61; break;
+		case biMesaBryce:            a_HeightAmp = 0.15f;  a_MidPoint =  61; break;
+		case biMesaPlateau:          a_HeightAmp = 0.25f;  a_MidPoint =  86; break;
+		case biMesaPlateauF:         a_HeightAmp = 0.25f;  a_MidPoint =  96; break;
+		case biMesaPlateauFM:        a_HeightAmp = 0.25f;  a_MidPoint =  96; break;
+		case biMesaPlateauM:         a_HeightAmp = 0.25f;  a_MidPoint =  86; break;
+		case biMushroomShore:        a_HeightAmp = 0.075f; a_MidPoint =  60; break;
+		case biMushroomIsland:       a_HeightAmp = 0.06f;  a_MidPoint =  80; break;
+		case biNether:               a_HeightAmp = 0.01f;  a_MidPoint =  64; break;
+		case biOcean:                a_HeightAmp = 0.12f;  a_MidPoint =  45; break;
+		case biPlains:               a_HeightAmp = 0.3f;   a_MidPoint =  62; break;
+		case biRiver:                a_HeightAmp = 0.4f;   a_MidPoint =  54; break;
+		case biRoofedForest:         a_HeightAmp = 0.1f;   a_MidPoint =  64; break;
+		case biRoofedForestM:        a_HeightAmp = 0.1f;   a_MidPoint =  64; break;
+		case biSavanna:              a_HeightAmp = 0.3f;   a_MidPoint =  62; break;
+		case biSavannaM:             a_HeightAmp = 0.3f;   a_MidPoint =  62; break;
+		case biSavannaPlateau:       a_HeightAmp = 0.3f;   a_MidPoint =  85; break;
+		case biSavannaPlateauM:      a_HeightAmp = 0.012f; a_MidPoint = 105; break;
+		case biStoneBeach:           a_HeightAmp = 0.075f; a_MidPoint =  60; break;
+		case biSunflowerPlains:      a_HeightAmp = 0.3f;   a_MidPoint =  62; break;
+		case biSwampland:            a_HeightAmp = 0.25f;  a_MidPoint =  59; break;
+		case biSwamplandM:           a_HeightAmp = 0.11f;  a_MidPoint =  59; break;
+		case biTaiga:                a_HeightAmp = 0.1f;   a_MidPoint =  64; break;
+		case biTaigaM:               a_HeightAmp = 0.1f;   a_MidPoint =  70; break;
+		case biTaigaHills:           a_HeightAmp = 0.075f; a_MidPoint =  68; break;
+		default:
+		{
+			// Make a crazy terrain so that it stands out
+			a_HeightAmp = 0.001f;
+			a_MidPoint = 90;
+			break;
+		}
+	}
+}
 
-	a_ChunkDesc.FillBlocks(E_BLOCK_AIR, 0);
 
-	// Make basic terrain composition:
+
+
+void cBiomalNoise3DComposable::GenShape(int a_ChunkX, int a_ChunkZ, cChunkDesc::Shape & a_Shape)
+{
+	GenerateNoiseArrayIfNeeded(a_ChunkX, a_ChunkZ);
+
+	// Translate the noise array into Shape:
 	for (int z = 0; z < cChunkDef::Width; z++)
 	{
 		for (int x = 0; x < cChunkDef::Width; x++)
 		{
-			int LastAir = a_ChunkDesc.GetHeight(x, z) + 1;
-			bool HasHadWater = false;
-			for (int y = LastAir; y < m_SeaLevel; y++)
+			for (int y = 0; y < cChunkDef::Height; y++)
 			{
-				a_ChunkDesc.SetBlockType(x, y, z, E_BLOCK_STATIONARY_WATER);
+				a_Shape[y + x * 256 + z * 256 * 16] = (m_NoiseArray[y + 257 * x + 257 * 17 * z] > m_AirThreshold) ? 0 : 1;
 			}
-			for (int y = LastAir - 1; y > 0; y--)
-			{
-				if (m_NoiseArray[x + 17 * z + 17 * 17 * y] > m_AirThreshold)
-				{
-					// "air" part
-					LastAir = y;
-					if (y < m_SeaLevel)
-					{
-						a_ChunkDesc.SetBlockType(x, y, z, E_BLOCK_STATIONARY_WATER);
-						HasHadWater = true;
-					}
-					continue;
-				}
-				// "ground" part:
-				if (LastAir - y > 4)
-				{
-					a_ChunkDesc.SetBlockType(x, y, z, E_BLOCK_STONE);
-					continue;
-				}
-				if (HasHadWater)
-				{
-					a_ChunkDesc.SetBlockType(x, y, z, E_BLOCK_SAND);
-				}
-				else
-				{
-					a_ChunkDesc.SetBlockType(x, y, z, (LastAir == y + 1) ? E_BLOCK_GRASS : E_BLOCK_DIRT);
-				}
-			}  // for y
-			a_ChunkDesc.SetBlockType(x, 0, z, E_BLOCK_BEDROCK);
 		}  // for x
 	}  // for z
 }
@@ -573,3 +810,4 @@ void cNoise3DComposable::ComposeTerrain(cChunkDesc & a_ChunkDesc)
 
 
 
+
diff --git a/src/Generating/Noise3DGenerator.h b/src/Generating/Noise3DGenerator.h
index 42f61a854..35b1e4c94 100644
--- a/src/Generating/Noise3DGenerator.h
+++ b/src/Generating/Noise3DGenerator.h
@@ -1,7 +1,11 @@
 
 // Noise3DGenerator.h
 
-// Generates terrain using 3D noise, rather than composing. Is a test.
+// Declares cNoise3DGenerator and cNoise3DComposable classes, representing 3D-noise-based generators.
+// They generate terrain shape by combining a lerp of two 3D noises with a vertical linear gradient
+// cNoise3DGenerator is obsolete and unmaintained.
+// cNoise3DComposable is used to test parameter combinations for single-biome worlds.
+
 
 
 
@@ -9,7 +13,8 @@
 #pragma once
 
 #include "ComposableGenerator.h"
-#include "../Noise.h"
+#include "../Noise/Noise.h"
+#include "../Noise/InterpolNoise.h"
 
 
 
@@ -30,17 +35,20 @@ public:
 	
 protected:
 	// Linear interpolation step sizes, must be divisors of cChunkDef::Width and cChunkDef::Height, respectively:
-	static const int UPSCALE_X = 8;
-	static const int UPSCALE_Y = 4;
-	static const int UPSCALE_Z = 8;
+	static const int UPSCALE_X = 4;
+	static const int UPSCALE_Y = 8;
+	static const int UPSCALE_Z = 4;
 	
 	// Linear interpolation buffer dimensions, calculated from the step sizes:
 	static const int DIM_X = 1 + cChunkDef::Width  / UPSCALE_X;
 	static const int DIM_Y = 1 + cChunkDef::Height / UPSCALE_Y;
 	static const int DIM_Z = 1 + cChunkDef::Width  / UPSCALE_Z;
 
-	cPerlinNoise m_Perlin;   // The base 3D noise source for the actual composition
-	cCubicNoise  m_Cubic;    // The noise used for heightmap directing
+	/** The base 3D noise source for the actual composition */
+	cOctavedNoise<cInterp5DegNoise> m_Perlin;
+
+	/** The noise used for heightmap directing. */
+	cOctavedNoise<cInterp5DegNoise> m_Cubic;
 	
 	int            m_SeaLevel;
 	NOISE_DATATYPE m_HeightAmplification;
@@ -65,8 +73,7 @@ protected:
 
 
 class cNoise3DComposable :
-	public cTerrainHeightGen,
-	public cTerrainCompositionGen
+	public cTerrainShapeGen
 {
 public:
 	cNoise3DComposable(int a_Seed);
@@ -74,31 +81,135 @@ public:
 	void Initialize(cIniFile & a_IniFile);
 
 protected:
-	cNoise m_Noise1;
-	cNoise m_Noise2;
-	cNoise m_Noise3;
+	/** The 3D noise that is used to choose between density noise A and B. */
+	cOctavedNoise<cInterpolNoise<Interp5Deg>> m_ChoiceNoise;
+
+	/** Density 3D noise, variant A. */
+	cOctavedNoise<cInterpolNoise<Interp5Deg>> m_DensityNoiseA;
+
+	/** Density 3D noise, variant B. */
+	cOctavedNoise<cInterpolNoise<Interp5Deg>> m_DensityNoiseB;
+
+	/** Heightmap-like noise used to provide variance for low-amplitude biomes. */
+	cOctavedNoise<cInterpolNoise<Interp5Deg>> m_BaseNoise;
 	
-	int            m_SeaLevel;
+	/** The main parameter of the generator, specifies the slope of the vertical linear gradient.
+	A higher value means a steeper slope and a smaller total amplitude of the generated terrain. */
 	NOISE_DATATYPE m_HeightAmplification;
-	NOISE_DATATYPE m_MidPoint;  // Where the vertical "center" of the noise should be
+
+	/** Where the vertical "center" of the noise should be, as block height. */
+	NOISE_DATATYPE m_MidPoint;
+
+	// Frequency of the 3D noise's first octave:
 	NOISE_DATATYPE m_FrequencyX;
 	NOISE_DATATYPE m_FrequencyY;
 	NOISE_DATATYPE m_FrequencyZ;
+
+	// Frequency of the base terrain noise:
+	NOISE_DATATYPE m_BaseFrequencyX;
+	NOISE_DATATYPE m_BaseFrequencyZ;
+
+	// Frequency of the choice noise:
+	NOISE_DATATYPE m_ChoiceFrequencyX;
+	NOISE_DATATYPE m_ChoiceFrequencyY;
+	NOISE_DATATYPE m_ChoiceFrequencyZ;
+
+	// Threshold for when the values are considered air:
 	NOISE_DATATYPE m_AirThreshold;
 	
+	// Cache for the last calculated chunk (reused between heightmap and composition queries):
 	int m_LastChunkX;
 	int m_LastChunkZ;
 	NOISE_DATATYPE m_NoiseArray[17 * 17 * 257];  // x + 17 * z + 17 * 17 * y
 	
 	
-	/// Generates the 3D noise array used for terrain generation, unless the LastChunk coords are equal to coords given
+	/** Generates the 3D noise array used for terrain generation (m_NoiseArray), unless the LastChunk coords are equal to coords given */
 	void GenerateNoiseArrayIfNeeded(int a_ChunkX, int a_ChunkZ);
 	
 	// cTerrainHeightGen overrides:
-	virtual void GenHeightMap(int a_ChunkX, int a_ChunkZ, cChunkDef::HeightMap & a_HeightMap) override;
+	virtual void GenShape(int a_ChunkX, int a_ChunkZ, cChunkDesc::Shape & a_Shape) override;
+	virtual void InitializeShapeGen(cIniFile & a_IniFile) override { Initialize(a_IniFile); }
+} ;
+
+
+
+
+
+class cBiomalNoise3DComposable :
+	public cTerrainShapeGen
+{
+public:
+	cBiomalNoise3DComposable(int a_Seed, cBiomeGenPtr a_BiomeGen);
+
+	void Initialize(cIniFile & a_IniFile);
+
+protected:
+	/** Number of columns around the pixel to query for biomes for averaging. Must be less than or equal to 16. */
+	static const int AVERAGING_SIZE = 9;
+
+	/** Type used for a single parameter across the entire (downscaled) chunk. */
+	typedef NOISE_DATATYPE ChunkParam[5 * 5];
 
-	// cTerrainCompositionGen overrides:
-	virtual void ComposeTerrain(cChunkDesc & a_ChunkDesc) override;
+
+	/** The noise that is used to choose between density noise A and B. */
+	cOctavedNoise<cInterpolNoise<Interp5Deg>> m_ChoiceNoise;
+
+	/** Density 3D noise, variant A. */
+	cOctavedNoise<cInterpolNoise<Interp5Deg>> m_DensityNoiseA;
+
+	/** Density 3D noise, variant B. */
+	cOctavedNoise<cInterpolNoise<Interp5Deg>> m_DensityNoiseB;
+
+	/** Heightmap-like noise used to provide variance for low-amplitude biomes. */
+	cOctavedNoise<cInterpolNoise<Interp5Deg>> m_BaseNoise;
+
+	/** The underlying biome generator. */
+	cBiomeGenPtr m_BiomeGen;
+	
+	/** Block height of the sealevel, used for composing the terrain. */
+	int m_SeaLevel;
+
+	// Frequency of the 3D noise's first octave:
+	NOISE_DATATYPE m_FrequencyX;
+	NOISE_DATATYPE m_FrequencyY;
+	NOISE_DATATYPE m_FrequencyZ;
+
+	// Frequency of the base terrain noise:
+	NOISE_DATATYPE m_BaseFrequencyX;
+	NOISE_DATATYPE m_BaseFrequencyZ;
+
+	// Frequency of the choice noise:
+	NOISE_DATATYPE m_ChoiceFrequencyX;
+	NOISE_DATATYPE m_ChoiceFrequencyY;
+	NOISE_DATATYPE m_ChoiceFrequencyZ;
+
+	// Threshold for when the values are considered air:
+	NOISE_DATATYPE m_AirThreshold;
+	
+	// Cache for the last calculated chunk (reused between heightmap and composition queries):
+	int m_LastChunkX;
+	int m_LastChunkZ;
+	NOISE_DATATYPE m_NoiseArray[17 * 17 * 257];  // 257 * x + y + 257 * 17 * z
+
+	/** Weights for summing up neighboring biomes. */
+	NOISE_DATATYPE m_Weight[AVERAGING_SIZE * 2 + 1][AVERAGING_SIZE * 2 + 1];
+
+	/** The sum of m_Weight[]. */
+	NOISE_DATATYPE m_WeightSum;
+	
+	
+	/** Generates the 3D noise array used for terrain generation (m_NoiseArray), unless the LastChunk coords are equal to coords given */
+	void GenerateNoiseArrayIfNeeded(int a_ChunkX, int a_ChunkZ);
+
+	/** Calculates the biome-related parameters for the chunk. */
+	void CalcBiomeParamArrays(int a_ChunkX, int a_ChunkZ, ChunkParam & a_HeightAmp, ChunkParam & a_MidPoint);
+
+	/** Returns the parameters for the specified biome. */
+	void GetBiomeParams(EMCSBiome a_Biome, NOISE_DATATYPE & a_HeightAmp, NOISE_DATATYPE & a_MidPoint);
+	
+	// cTerrainShapeGen overrides:
+	virtual void GenShape(int a_ChunkX, int a_ChunkZ, cChunkDesc::Shape & a_Shape) override;
+	virtual void InitializeShapeGen(cIniFile & a_IniFile) override { Initialize(a_IniFile); }
 } ;
 
 
diff --git a/src/Generating/PieceGenerator.h b/src/Generating/PieceGenerator.h
index f06029280..43ffed7a2 100644
--- a/src/Generating/PieceGenerator.h
+++ b/src/Generating/PieceGenerator.h
@@ -20,7 +20,7 @@ Each uses a slightly different approach to generating:
 
 #include "../Defines.h"
 #include "../Cuboid.h"
-#include "../Noise.h"
+#include "../Noise/Noise.h"
 
 
 
diff --git a/src/Generating/ProtIntGen.h b/src/Generating/ProtIntGen.h
new file mode 100644
index 000000000..73ed27096
--- /dev/null
+++ b/src/Generating/ProtIntGen.h
@@ -0,0 +1,1351 @@
+
+// ProtIntGen.h
+
+// Declares the prototyping integer generators - cProtIntGen class and its descendants
+
+/*
+These classes generate 2D arrays of integers that have various interpretations. The main purpose of these
+classes is to provide fast prototyping for cIntGen classes - unlike cIntGen classes, these are not
+template-based and so they take care of the underlying sizes automatically. This makes them easier to chain
+and re-chain, since the size parameters don't need to be adjusted after each such case. Their performance is,
+however, slightly worse, which is why we use cIntGen classes in the final generator.
+
+Because there is no SizeX / SizeZ template param, the generators would have to either alloc memory for each
+underlying generator's values, or use a maximum-size buffer. We chose the latter, to avoid memory allocation
+overhead; this however means that there's (an arbitrary) limit to the size of the generated data.
+*/
+
+
+
+
+
+#pragma once
+
+// We need the biome group constants defined there:
+#include "IntGen.h"
+
+
+
+
+
+/** Interface that all the generator classes provide. */
+class cProtIntGen
+{
+protected:
+	/** Maximum size of the generated area.
+	Adjust the constant if you need larger areas, these are just so that we can use fixed-size buffers. */
+	static const int m_BufferSize = 900;
+
+public:
+
+	/** Type of the generic interface used for storing links to the underlying generators. */
+	typedef std::shared_ptr<cProtIntGen> Underlying;
+
+
+	/** Force a virtual destructor in all descendants.
+	Descendants contain virtual functions and are referred to via pointer-to-base, so they need a virtual destructor. */
+	virtual ~cProtIntGen() {}
+
+	/** Generates the array of specified size into a_Values, based on given min coords. */
+	virtual void GetInts(int a_MinX, int a_MinZ, int a_SizeX, int a_SizeZ, int * a_Values) = 0;
+};
+
+
+
+
+
+/** Provides additional cNoise member and its helper functions. */
+class cProtIntGenWithNoise :
+	public cProtIntGen
+{
+	typedef cProtIntGen super;
+
+public:
+	cProtIntGenWithNoise(int a_Seed) :
+		m_Noise(a_Seed)
+	{
+	}
+
+protected:
+	cNoise m_Noise;
+
+	/** Chooses one of a_Val1 or a_Val2, based on m_Noise and the coordinates for querying the noise. */
+	int chooseRandomOne(int a_RndX, int a_RndZ, int a_Val1, int a_Val2)
+	{
+		int rnd = m_Noise.IntNoise2DInt(a_RndX, a_RndZ) / 7;
+		return ((rnd & 1) == 0) ? a_Val1 : a_Val2;
+	}
+
+	/** Chooses one of a_ValN, based on m_Noise and the coordinates for querying the noise. */
+	int chooseRandomOne(int a_RndX, int a_RndZ, int a_Val1, int a_Val2, int a_Val3, int a_Val4)
+	{
+		int rnd = m_Noise.IntNoise2DInt(a_RndX, a_RndZ) / 7;
+		switch (rnd % 4)
+		{
+			case 0:  return a_Val1;
+			case 1:  return a_Val2;
+			case 2:  return a_Val3;
+			default: return a_Val4;
+		}
+	}
+};
+
+
+
+
+
+
+/** Generates a 2D array of random integers in the specified range [0 .. Range). */
+class cProtIntGenChoice :
+	public cProtIntGenWithNoise
+{
+	typedef cProtIntGenWithNoise super;
+
+public:
+	cProtIntGenChoice(int a_Seed, int a_Range) :
+		super(a_Seed),
+		m_Range(a_Range)
+	{
+	}
+
+
+	virtual void GetInts(int a_MinX, int a_MinZ, int a_SizeX, int a_SizeZ, int * a_Values) override
+	{
+		for (int z = 0; z < a_SizeZ; z++)
+		{
+			int BaseZ = a_MinZ + z;
+			for (int x = 0; x < a_SizeX; x++)
+			{
+				a_Values[x + a_SizeX * z] = (super::m_Noise.IntNoise2DInt(a_MinX + x, BaseZ) / 7) % m_Range;
+			}
+		}  // for z
+	}
+
+protected:
+	int m_Range;
+};
+
+
+
+
+
+
+/** Decides between the ocean and landmass biomes.
+Has a threshold (in percent) of how much land, the larger the threshold, the more land.
+Generates 0 for ocean, biome group ID for landmass. */
+class cProtIntGenLandOcean :
+	public cProtIntGenWithNoise
+{
+	typedef cProtIntGenWithNoise super;
+
+public:
+	cProtIntGenLandOcean(int a_Seed, int a_Threshold) :
+		super(a_Seed),
+		m_Threshold(a_Threshold)
+	{
+	}
+
+
+	virtual void GetInts(int a_MinX, int a_MinZ, int a_SizeX, int a_SizeZ, int * a_Values) override
+	{
+		for (int z = 0; z < a_SizeZ; z++)
+		{
+			int BaseZ = a_MinZ + z;
+			for (int x = 0; x < a_SizeX; x++)
+			{
+				int rnd = (super::m_Noise.IntNoise2DInt(a_MinX + x, BaseZ) / 7);
+				a_Values[x + a_SizeX * z] = ((rnd % 100) < m_Threshold) ? ((rnd / 101) % bgLandOceanMax + 1) : 0;
+			}
+		}
+
+		// If the centerpoint of the world is within the area, set it to bgTemperate, always:
+		if ((a_MinX <= 0) && (a_MinZ <= 0) && (a_MinX + a_SizeX > 0) && (a_MinZ + a_SizeZ > 0))
+		{
+			a_Values[-a_MinX - a_MinZ * a_SizeX] = bgTemperate;
+		}
+	}
+
+protected:
+	int m_Threshold;
+};
+
+
+
+
+
+/** Zooms the underlying value array to twice the size. Uses random-neighbor for the pixels in-between.
+This means that the zoome out image is randomly distorted. Applying zoom several times provides all
+the distortion that the generators need. */
+class cProtIntGenZoom :
+	public cProtIntGenWithNoise
+{
+	typedef cProtIntGenWithNoise super;
+
+public:
+	cProtIntGenZoom(int a_Seed, Underlying a_UnderlyingGen) :
+		super(a_Seed),
+		m_UnderlyingGen(a_UnderlyingGen)
+	{
+	}
+
+
+	virtual void GetInts(int a_MinX, int a_MinZ, int a_SizeX, int a_SizeZ, int * a_Values) override
+	{
+		// Get the coords for the lower generator:
+		int lowerMinX = a_MinX >> 1;
+		int lowerMinZ = a_MinZ >> 1;
+		int lowerSizeX = a_SizeX / 2 + 2;
+		int lowerSizeZ = a_SizeZ / 2 + 2;
+		ASSERT(lowerSizeX * lowerSizeZ <= m_BufferSize);
+		ASSERT(lowerSizeX > 0);
+		ASSERT(lowerSizeZ > 0);
+
+		// Generate the underlying data with half the resolution:
+		int lowerData[m_BufferSize];
+		m_UnderlyingGen->GetInts(lowerMinX, lowerMinZ, lowerSizeX, lowerSizeZ, lowerData);
+		const int lowStepX = (lowerSizeX - 1) * 2;
+		int cache[m_BufferSize];
+
+		// Discreet-interpolate the values into twice the size:
+		for (int z = 0; z < lowerSizeZ - 1; ++z)
+		{
+			int idx = (z * 2) * lowStepX;
+			int PrevZ0 = lowerData[z * lowerSizeX];
+			int PrevZ1 = lowerData[(z + 1) * lowerSizeX];
+
+			for (int x = 0; x < lowerSizeX - 1; ++x)
+			{
+				int ValX1Z0 = lowerData[x + 1 + z * lowerSizeX];
+				int ValX1Z1 = lowerData[x + 1 + (z + 1) * lowerSizeX];
+				int RndX = (x + lowerMinX) * 2;
+				int RndZ = (z + lowerMinZ) * 2;
+				cache[idx] = PrevZ0;
+				cache[idx + lowStepX] = super::chooseRandomOne(RndX, RndZ + 1, PrevZ0, PrevZ1);
+				cache[idx + 1]        = super::chooseRandomOne(RndX, RndZ - 1, PrevZ0, ValX1Z0);
+				cache[idx + 1 + lowStepX] = super::chooseRandomOne(RndX, RndZ, PrevZ0, ValX1Z0, PrevZ1, ValX1Z1);
+				idx += 2;
+				PrevZ0 = ValX1Z0;
+				PrevZ1 = ValX1Z1;
+			}
+		}
+
+		// Copy from Cache into a_Values; take into account the even/odd offsets in a_Min:
+		for (int z = 0; z < a_SizeZ; ++z)
+		{
+			memcpy(a_Values + z * a_SizeX, cache + (z + (a_MinZ & 1)) * lowStepX + (a_MinX & 1), a_SizeX * sizeof(int));
+		}
+	}
+
+protected:
+	Underlying m_UnderlyingGen;
+};
+
+
+
+
+
+/** Smoothes out some artifacts generated by the zooming - mostly single-pixel values.
+Compares each pixel to its neighbors and if the neighbors are equal, changes the pixel to their value. */
+class cProtIntGenSmooth :
+	public cProtIntGenWithNoise
+{
+	typedef cProtIntGenWithNoise super;
+
+public:
+	cProtIntGenSmooth(int a_Seed, Underlying a_Underlying) :
+		super(a_Seed),
+		m_Underlying(a_Underlying)
+	{
+	}
+
+
+	virtual void GetInts(int a_MinX, int a_MinZ, int a_SizeX, int a_SizeZ, int * a_Values) override
+	{
+		// Generate the underlying values:
+		int lowerSizeX = a_SizeX + 2;
+		int lowerSizeZ = a_SizeZ + 2;
+		ASSERT(lowerSizeX * lowerSizeZ <= m_BufferSize);
+		int lowerData[m_BufferSize];
+		m_Underlying->GetInts(a_MinX - 1, a_MinZ - 1, lowerSizeX, lowerSizeZ, lowerData);
+
+		// Smooth - for each square check if the surroundings are the same, if so, expand them diagonally.
+		// Also get rid of single-pixel irregularities (A-B-A):
+		for (int z = 0; z < a_SizeZ; z++)
+		{
+			int NoiseZ = a_MinZ + z;
+			for (int x = 0; x < a_SizeX; x++)
+			{
+				int val   = lowerData[x + 1 + (z + 1) * lowerSizeX];
+				int above = lowerData[x + 1 +  z      * lowerSizeX];
+				int below = lowerData[x + 1 + (z + 2) * lowerSizeX];
+				int left  = lowerData[x     + (z + 1) * lowerSizeX];
+				int right = lowerData[x + 2 + (z + 1) * lowerSizeX];
+
+				if ((left == right) && (above == below))
+				{
+					if (((super::m_Noise.IntNoise2DInt(a_MinX + x, NoiseZ) / 7) % 2) == 0)
+					{
+						val = left;
+					}
+					else
+					{
+						val = above;
+					}
+				}
+				else
+				{
+					if (left == right)
+					{
+						val = left;
+					}
+
+					if (above == below)
+					{
+						val = above;
+					}
+				}
+
+				a_Values[x + z * a_SizeX] = val;
+			}
+		}
+	}
+
+protected:
+	Underlying m_Underlying;
+};
+
+
+
+
+
+/** Converts land biomes at the edge of an ocean into the respective beach biome. */
+class cProtIntGenBeaches :
+	public cProtIntGen
+{
+	typedef cProtIntGen super;
+
+public:
+	cProtIntGenBeaches(Underlying a_Underlying) :
+		m_Underlying(a_Underlying)
+	{
+	}
+
+
+	virtual void GetInts(int a_MinX, int a_MinZ, int a_SizeX, int a_SizeZ, int * a_Values) override
+	{
+		// Map for biome -> its beach:
+		static const int ToBeach[] =
+		{
+			/* biOcean            */ biOcean,
+			/* biPlains           */ biBeach,
+			/* biDesert           */ biBeach,
+			/* biExtremeHills     */ biStoneBeach,
+			/* biForest           */ biBeach,
+			/* biTaiga            */ biColdBeach,
+			/* biSwampland        */ biSwampland,
+			/* biRiver            */ biRiver,
+			/* biNether           */ biNether,
+			/* biEnd              */ biEnd,
+			/* biFrozenOcean      */ biColdBeach,
+			/* biFrozenRiver      */ biColdBeach,
+			/* biIcePlains        */ biColdBeach,
+			/* biIceMountains     */ biColdBeach,
+			/* biMushroomIsland   */ biMushroomShore,
+			/* biMushroomShore    */ biMushroomShore,
+			/* biBeach            */ biBeach,
+			/* biDesertHills      */ biBeach,
+			/* biForestHills      */ biBeach,
+			/* biTaigaHills       */ biColdBeach,
+			/* biExtremeHillsEdge */ biStoneBeach,
+			/* biJungle           */ biBeach,
+			/* biJungleHills      */ biBeach,
+			/* biJungleEdge       */ biBeach,
+			/* biDeepOcean        */ biOcean,
+			/* biStoneBeach       */ biStoneBeach,
+			/* biColdBeach        */ biColdBeach,
+			/* biBirchForest      */ biBeach,
+			/* biBirchForestHills */ biBeach,
+			/* biRoofedForest     */ biBeach,
+			/* biColdTaiga        */ biColdBeach,
+			/* biColdTaigaHills   */ biColdBeach,
+			/* biMegaTaiga        */ biStoneBeach,
+			/* biMegaTaigaHills   */ biStoneBeach,
+			/* biExtremeHillsPlus */ biStoneBeach,
+			/* biSavanna          */ biBeach,
+			/* biSavannaPlateau   */ biBeach,
+			/* biMesa             */ biMesa,
+			/* biMesaPlateauF     */ biMesa,
+			/* biMesaPlateau      */ biMesa,
+		};
+
+		// Generate the underlying values:
+		int lowerSizeX = a_SizeX + 2;
+		int lowerSizeZ = a_SizeZ + 2;
+		ASSERT(lowerSizeX * lowerSizeZ <= m_BufferSize);
+		int lowerValues[m_BufferSize];
+		m_Underlying->GetInts(a_MinX - 1, a_MinZ - 1, lowerSizeX, lowerSizeZ, lowerValues);
+
+		// Add beaches between ocean and biomes:
+		for (int z = 0; z < a_SizeZ; z++)
+		{
+			for (int x = 0; x < a_SizeX; x++)
+			{
+				int val   = lowerValues[x + 1 + (z + 1) * lowerSizeX];
+				int above = lowerValues[x + 1 + z       * lowerSizeX];
+				int below = lowerValues[x + 1 + (z + 2) * lowerSizeX];
+				int left  = lowerValues[x     + (z + 1) * lowerSizeX];
+				int right = lowerValues[x + 2 + (z + 1) * lowerSizeX];
+				if (!IsBiomeOcean(val))
+				{
+					if (IsBiomeOcean(above) || IsBiomeOcean(below) || IsBiomeOcean(left) || IsBiomeOcean(right))
+					{
+						// First convert the value to a regular biome (drop the M flag), then modulo by our biome count:
+						val = ToBeach[(val % 128) % ARRAYCOUNT(ToBeach)];
+					}
+				}
+				a_Values[x + z * a_SizeX] = val;
+			}
+		}
+	}
+
+protected:
+	Underlying m_Underlying;
+};
+
+
+
+
+
+/** Generates the underlying numbers and then randomly changes some ocean group pixels into random land
+biome group pixels, based on the predefined chance. */
+class cProtIntGenAddIslands :
+	public cProtIntGenWithNoise
+{
+	typedef cProtIntGenWithNoise super;
+
+public:
+	typedef std::shared_ptr<cProtIntGen> Underlying;
+
+
+	cProtIntGenAddIslands(int a_Seed, int a_Chance, Underlying a_Underlying) :
+		super(a_Seed),
+		m_Chance(a_Chance),
+		m_Underlying(a_Underlying)
+	{
+	}
+
+
+	virtual void GetInts(int a_MinX, int a_MinZ, int a_SizeX, int a_SizeZ, int * a_Values) override
+	{
+		m_Underlying->GetInts(a_MinX, a_MinZ, a_SizeX, a_SizeZ, a_Values);
+		for (int z = 0; z < a_SizeZ; z++)
+		{
+			for (int x = 0; x < a_SizeX; x++)
+			{
+				if (a_Values[x + z * a_SizeX] == bgOcean)
+				{
+					int rnd = super::m_Noise.IntNoise2DInt(a_MinX + x, a_MinZ + z) / 7;
+					if (rnd % 1000 < m_Chance)
+					{
+						a_Values[x + z * a_SizeX] = (rnd / 1003) % bgLandOceanMax;
+					}
+				}
+			}
+		}
+	}
+
+protected:
+	/** Chance of each ocean pixel being converted, in permille. */
+	int m_Chance;
+
+	Underlying m_Underlying;
+};
+
+
+
+
+
+/** A filter that adds an edge biome group between two biome groups that need an edge between them. */
+class cProtIntGenBiomeGroupEdges :
+	public cProtIntGen
+{
+	typedef cProtIntGen super;
+
+public:
+	cProtIntGenBiomeGroupEdges(Underlying a_Underlying) :
+		m_Underlying(a_Underlying)
+	{
+	}
+
+
+	virtual void GetInts(int a_MinX, int a_MinZ, int a_SizeX, int a_SizeZ, int * a_Values)
+	{
+		// Generate the underlying biome groups:
+		int lowerSizeX = a_SizeX + 2;
+		int lowerSizeZ = a_SizeZ + 2;
+		ASSERT(lowerSizeX * lowerSizeZ <= m_BufferSize);
+		int lowerValues[m_BufferSize];
+		m_Underlying->GetInts(a_MinX, a_MinZ, lowerSizeX, lowerSizeZ, lowerValues);
+
+		// Change the biomes on incompatible edges into an edge biome:
+		for (int z = 0; z < a_SizeZ; z++)
+		{
+			for (int x = 0; x < a_SizeX; x++)
+			{
+				int val   = lowerValues[x + 1 + (z + 1) * lowerSizeX];
+				int Above = lowerValues[x + 1 + z       * lowerSizeX];
+				int Below = lowerValues[x + 1 + (z + 2) * lowerSizeX];
+				int Left  = lowerValues[x     + (z + 1) * lowerSizeX];
+				int Right = lowerValues[x + 2 + (z + 1) * lowerSizeX];
+				switch (val)
+				{
+					// Desert should neighbor only oceans, desert and temperates; change to temperate when another:
+					case bgDesert:
+					{
+						if (
+							!isDesertCompatible(Above) ||
+							!isDesertCompatible(Below) ||
+							!isDesertCompatible(Left) ||
+							!isDesertCompatible(Right)
+						)
+						{
+							val = bgTemperate;
+						}
+						break;
+					}  // case bgDesert
+
+					// Ice should not neighbor deserts; change to temperate:
+					case bgIce:
+					{
+						if (
+							(Above == bgDesert) ||
+							(Below == bgDesert) ||
+							(Left  == bgDesert) ||
+							(Right == bgDesert)
+						)
+						{
+							val = bgTemperate;
+						}
+						break;
+					}  // case bgIce
+				}
+				a_Values[x + z * a_SizeX] = val;
+			}  // for x
+		}  // for z
+	}
+
+protected:
+	Underlying m_Underlying;
+
+
+	inline bool isDesertCompatible(int a_BiomeGroup)
+	{
+		switch (a_BiomeGroup)
+		{
+			case bgOcean:
+			case bgDesert:
+			case bgTemperate:
+			{
+				return true;
+			}
+			default:
+			{
+				return false;
+			}
+		}
+	}
+};
+
+
+
+
+
+/** Turns biome group indices into real biomes.
+For each pixel, takes its biome group and chooses a random biome from that group; replaces the value with
+that biome. */
+class cProtIntGenBiomes :
+	public cProtIntGenWithNoise
+{
+	typedef cProtIntGenWithNoise super;
+
+public:
+	cProtIntGenBiomes(int a_Seed, Underlying a_Underlying) :
+		super(a_Seed),
+		m_Underlying(a_Underlying)
+	{
+	}
+
+
+	virtual void GetInts(int a_MinX, int a_MinZ, int a_SizeX, int a_SizeZ, int * a_Values) override
+	{
+		// Define the per-biome-group biomes:
+		static const int oceanBiomes[] =
+		{
+			biOcean,  // biDeepOcean,
+		};
+
+		// Same as oceanBiomes, there are no rare oceanic biomes (mushroom islands are handled separately)
+		static const int rareOceanBiomes[] =
+		{
+			biOcean,
+		};
+
+		static const int desertBiomes[] =
+		{
+			biDesert, biDesert, biDesert, biDesert, biDesert, biDesert, biSavanna, biSavanna, biPlains,
+		};
+
+		static const int rareDesertBiomes[] =
+		{
+			biMesaPlateau, biMesaPlateauF,
+		};
+
+		static const int temperateBiomes[] =
+		{
+			biForest, biForest, biRoofedForest, biExtremeHills, biPlains, biBirchForest, biSwampland,
+		};
+
+		static const int rareTemperateBiomes[] =
+		{
+			biJungle,  // Jungle is not strictly temperate, but let's piggyback it here
+		};
+
+		static const int mountainBiomes[] =
+		{
+			biExtremeHills, biForest, biTaiga, biPlains,
+		};
+
+		static const int rareMountainBiomes[] =
+		{
+			biMegaTaiga,
+		};
+
+		static const int iceBiomes[] =
+		{
+			biIcePlains, biIcePlains, biIcePlains, biIcePlains, biColdTaiga,
+		};
+
+		// Same as iceBiomes, there's no rare ice biome
+		static const int rareIceBiomes[] =
+		{
+			biIcePlains, biIcePlains, biIcePlains, biIcePlains, biColdTaiga,
+		};
+
+		static const cBiomesInGroups biomesInGroups[] =
+		{
+			/* bgOcean */     { static_cast<int>(ARRAYCOUNT(oceanBiomes)),     oceanBiomes},
+			/* bgDesert */    { static_cast<int>(ARRAYCOUNT(desertBiomes)),    desertBiomes},
+			/* bgTemperate */ { static_cast<int>(ARRAYCOUNT(temperateBiomes)), temperateBiomes},
+			/* bgMountains */ { static_cast<int>(ARRAYCOUNT(mountainBiomes)),  mountainBiomes},
+			/* bgIce */       { static_cast<int>(ARRAYCOUNT(iceBiomes)),       iceBiomes},
+		};
+
+		static const cBiomesInGroups rareBiomesInGroups[] =
+		{
+			/* bgOcean */     { static_cast<int>(ARRAYCOUNT(rareOceanBiomes)),     rareOceanBiomes},
+			/* bgDesert */    { static_cast<int>(ARRAYCOUNT(rareDesertBiomes)),    rareDesertBiomes},
+			/* bgTemperate */ { static_cast<int>(ARRAYCOUNT(rareTemperateBiomes)), rareTemperateBiomes},
+			/* bgMountains */ { static_cast<int>(ARRAYCOUNT(rareMountainBiomes)),  rareMountainBiomes},
+			/* bgIce */       { static_cast<int>(ARRAYCOUNT(rareIceBiomes)),       rareIceBiomes},
+		};
+
+		// Generate the underlying values, representing biome groups:
+		m_Underlying->GetInts(a_MinX, a_MinZ, a_SizeX, a_SizeZ, a_Values);
+
+		// Overwrite each biome group with a random biome from that group:
+		// Take care of the bgfRare flag
+		for (int z = 0; z < a_SizeZ; z++)
+		{
+			int IdxZ = z * a_SizeX;
+			for (int x = 0; x < a_SizeX; x++)
+			{
+				int val = a_Values[x + IdxZ];
+				const cBiomesInGroups & Biomes = (val > bgfRare) ?
+					rareBiomesInGroups[(val & (bgfRare - 1)) % ARRAYCOUNT(rareBiomesInGroups)] :
+					biomesInGroups[val % ARRAYCOUNT(biomesInGroups)];
+				int rnd = (super::m_Noise.IntNoise2DInt(x + a_MinX, z + a_MinZ) / 7);
+				a_Values[x + IdxZ] = Biomes.Biomes[rnd % Biomes.Count];
+			}
+		}
+	}
+
+protected:
+
+	struct cBiomesInGroups
+	{
+		const int Count;
+		const int * Biomes;
+	};
+
+
+	/** The underlying int generator */
+	Underlying m_Underlying;
+};
+
+
+
+
+
+/** Randomly replaces pixels of one value to another value, using the given chance. */
+class cProtIntGenReplaceRandomly :
+	public cProtIntGenWithNoise
+{
+	typedef cProtIntGenWithNoise super;
+
+public:
+	typedef std::shared_ptr<cProtIntGen> Underlying;
+
+
+	cProtIntGenReplaceRandomly(int a_Seed, int a_From, int a_To, int a_Chance, Underlying a_Underlying) :
+		super(a_Seed),
+		m_From(a_From),
+		m_To(a_To),
+		m_Chance(a_Chance),
+		m_Underlying(a_Underlying)
+	{
+	}
+
+
+	virtual void GetInts(int a_MinX, int a_MinZ, int a_SizeX, int a_SizeZ, int * a_Values) override
+	{
+		// Generate the underlying values:
+		m_Underlying->GetInts(a_MinX, a_MinZ, a_SizeX, a_SizeZ, a_Values);
+
+		// Replace some of the values:
+		for (int z = 0; z < a_SizeZ; z++)
+		{
+			int idxZ = z * a_SizeX;
+			for (int x = 0; x < a_SizeX; x++)
+			{
+				int idx = x + idxZ;
+				if (a_Values[idx] == m_From)
+				{
+					int rnd = super::m_Noise.IntNoise2DInt(x + a_MinX, z + a_MinZ) / 7;
+					if (rnd % 1000 < m_Chance)
+					{
+						a_Values[idx] = m_To;
+					}
+				}
+			}
+		}  // for z
+	}
+
+
+protected:
+	/** The original value to be replaced. */
+	int m_From;
+
+	/** The destination value to which to replace. */
+	int m_To;
+
+	/** Chance, in permille, of replacing the value. */
+	int m_Chance;
+
+	Underlying m_Underlying;
+};
+
+
+
+
+
+/** Mixer that joins together finalized biomes and rivers.
+It first checks for oceans, if there is an ocean in the Biomes, it keeps the ocean.
+If there's no ocean, it checks Rivers for a river, if there is a river, it uses the Biomes to select either
+regular river or frozen river, based on the biome. */
+class cProtIntGenMixRivers:
+	public cProtIntGen
+{
+	typedef cProtIntGen super;
+
+public:
+	cProtIntGenMixRivers(Underlying a_Biomes, Underlying a_Rivers):
+		m_Biomes(a_Biomes),
+		m_Rivers(a_Rivers)
+	{
+	}
+
+
+	virtual void GetInts(int a_MinX, int a_MinZ, int a_SizeX, int a_SizeZ, int * a_Values) override
+	{
+		// Generate the underlying data:
+		ASSERT(a_SizeX * a_SizeZ <= m_BufferSize);
+		m_Biomes->GetInts(a_MinX, a_MinZ, a_SizeX, a_SizeZ, a_Values);
+		int riverData[m_BufferSize];
+		m_Rivers->GetInts(a_MinX, a_MinZ, a_SizeX, a_SizeZ, riverData);
+
+		// Mix the values:
+		for (int z = 0; z < a_SizeZ; z++)
+		{
+			int idxZ = z * a_SizeX;
+			for (int x = 0; x < a_SizeX; x++)
+			{
+				int idx = x + idxZ;
+				if (IsBiomeOcean(a_Values[idx]))
+				{
+					// Oceans are kept without any changes
+					continue;
+				}
+				if (riverData[idx] != biRiver)
+				{
+					// There's no river, keep the current value
+					continue;
+				}
+
+				// There's a river, change the output to a river or a frozen river, based on the original biome:
+				if (IsBiomeVeryCold((EMCSBiome)a_Values[idx]))
+				{
+					a_Values[idx] = biFrozenRiver;
+				}
+				else
+				{
+					a_Values[idx] = biRiver;
+				}
+			}  // for x
+		}  // for z
+	}
+
+protected:
+	Underlying m_Biomes;
+	Underlying m_Rivers;
+};
+
+
+
+
+
+/** Generates a river based on the underlying data.
+This is basically an edge detector over the underlying data. The rivers are the edges where the underlying
+data changes from one pixel to its neighbor. */
+class cProtIntGenRiver:
+	public cProtIntGenWithNoise
+{
+	typedef cProtIntGenWithNoise super;
+
+public:
+	cProtIntGenRiver(int a_Seed, Underlying a_Underlying):
+		super(a_Seed),
+		m_Underlying(a_Underlying)
+	{
+	}
+
+
+	virtual void GetInts(int a_MinX, int a_MinZ, int a_SizeX, int a_SizeZ, int * a_Values) override
+	{
+		// Generate the underlying data:
+		int lowerSizeX = a_SizeX + 2;
+		int lowerSizeZ = a_SizeZ + 2;
+		ASSERT(lowerSizeX * lowerSizeZ <= m_BufferSize);
+		int lowerValues[m_BufferSize];
+		m_Underlying->GetInts(a_MinX - 1, a_MinZ - 1, lowerSizeX, lowerSizeZ, lowerValues);
+
+		// Detect the edges:
+		for (int z = 0; z < a_SizeZ; z++)
+		{
+			for (int x = 0; x < a_SizeX; x++)
+			{
+				int Above = lowerValues[x + 1 + z       * lowerSizeX];
+				int Below = lowerValues[x + 1 + (z + 2) * lowerSizeX];
+				int Left  = lowerValues[x +     (z + 1) * lowerSizeX];
+				int Right = lowerValues[x + 2 + (z + 1) * lowerSizeX];
+				int val   = lowerValues[x + 1 + (z + 1) * lowerSizeX];
+
+				if ((val == Above) && (val == Below) && (val == Left) && (val == Right))
+				{
+					val = 0;
+				}
+				else
+				{
+					val = biRiver;
+				}
+				a_Values[x + z * a_SizeX] = val;
+			}  // for x
+		}  // for z
+	}
+
+protected:
+	Underlying m_Underlying;
+};
+
+
+
+
+
+/** Turns some of the oceans into the specified biome. Used for mushroom and deep ocean.
+The biome is only placed if at least 3 of its neighbors are ocean and only with the specified chance. */
+class cProtIntGenAddToOcean:
+	public cProtIntGenWithNoise
+{
+	typedef cProtIntGenWithNoise super;
+
+public:
+	cProtIntGenAddToOcean(int a_Seed, int a_Chance, int a_ToValue, Underlying a_Underlying):
+		super(a_Seed),
+		m_Chance(a_Chance),
+		m_ToValue(a_ToValue),
+		m_Underlying(a_Underlying)
+	{
+	}
+
+
+	virtual void GetInts(int a_MinX, int a_MinZ, int a_SizeX, int a_SizeZ, int * a_Values) override
+	{
+		// Generate the underlying data:
+		int lowerSizeX = a_SizeX + 2;
+		int lowerSizeZ = a_SizeZ + 2;
+		ASSERT(lowerSizeX * lowerSizeZ <= m_BufferSize);
+		int lowerValues[m_BufferSize];
+		m_Underlying->GetInts(a_MinX - 1, a_MinZ - 1, lowerSizeX, lowerSizeZ, lowerValues);
+
+		// Add the mushroom islands:
+		for (int z = 0; z < a_SizeZ; z++)
+		{
+			for (int x = 0; x < a_SizeX; x++)
+			{
+				int val = lowerValues[x + 1 + (z + 1) * lowerSizeX];
+				if (!IsBiomeOcean(val))
+				{
+					a_Values[x + z * a_SizeX] = val;
+					continue;
+				}
+
+				// Count the ocean neighbors:
+				int Above = lowerValues[x + 1 + z       * lowerSizeX];
+				int Below = lowerValues[x + 1 + (z + 2) * lowerSizeX];
+				int Left  = lowerValues[x +     (z + 1) * lowerSizeX];
+				int Right = lowerValues[x + 2 + (z + 1) * lowerSizeX];
+				int NumOceanNeighbors = 0;
+				if (IsBiomeOcean(Above))
+				{
+					NumOceanNeighbors += 1;
+				}
+				if (IsBiomeOcean(Below))
+				{
+					NumOceanNeighbors += 1;
+				}
+				if (IsBiomeOcean(Left))
+				{
+					NumOceanNeighbors += 1;
+				}
+				if (IsBiomeOcean(Right))
+				{
+					NumOceanNeighbors += 1;
+				}
+
+				// If at least 3 ocean neighbors and the chance is right, change:
+				if (
+					(NumOceanNeighbors >= 3) &&
+					((super::m_Noise.IntNoise2DInt(x + a_MinX, z + a_MinZ) / 7) % 1000 < m_Chance)
+				)
+				{
+					a_Values[x + z * a_SizeX] = m_ToValue;
+				}
+				else
+				{
+					a_Values[x + z * a_SizeX] = val;
+				}
+			}  // for x
+		}  // for z
+	}
+
+protected:
+	/** Chance, in permille, of changing the biome. */
+	int m_Chance;
+
+	/** The value to change the ocean into. */
+	int m_ToValue;
+
+	Underlying m_Underlying;
+};
+
+
+
+
+
+/** Changes random pixels of the underlying data to the specified value. */
+class cProtIntGenSetRandomly :
+	public cProtIntGenWithNoise
+{
+	typedef cProtIntGenWithNoise super;
+
+public:
+	cProtIntGenSetRandomly(int a_Seed, int a_Chance, int a_ToValue, Underlying a_Underlying) :
+		super(a_Seed),
+		m_Chance(a_Chance),
+		m_ToValue(a_ToValue),
+		m_Underlying(a_Underlying)
+	{
+	}
+
+
+	virtual void GetInts(int a_MinX, int a_MinZ, int a_SizeX, int a_SizeZ, int * a_Values) override
+	{
+		// Generate the underlying data:
+		m_Underlying->GetInts(a_MinX, a_MinZ, a_SizeX, a_SizeZ, a_Values);
+
+		// Change random pixels to bgOcean:
+		for (int z = 0; z < a_SizeZ; z++)
+		{
+			for (int x = 0; x < a_SizeX; x++)
+			{
+				int rnd = super::m_Noise.IntNoise2DInt(x + a_MinX, z + a_MinZ) / 7;
+				if (rnd % 1000 < m_Chance)
+				{
+					a_Values[x + z * a_SizeX] = m_ToValue;
+				}
+			}
+		}
+	}
+
+protected:
+	/** Chance, in permille, of changing each pixel. */
+	int m_Chance;
+
+	/** The value to which to set the pixel. */
+	int m_ToValue;
+
+	Underlying m_Underlying;
+};
+
+
+
+
+
+
+/** Adds a "rare" flag to random biome groups, based on the given chance. */
+class cProtIntGenRareBiomeGroups:
+	public cProtIntGenWithNoise
+{
+	typedef cProtIntGenWithNoise super;
+
+public:
+	cProtIntGenRareBiomeGroups(int a_Seed, int a_Chance, Underlying a_Underlying):
+		super(a_Seed),
+		m_Chance(a_Chance),
+		m_Underlying(a_Underlying)
+	{
+	}
+
+
+	virtual void GetInts(int a_MinX, int a_MinZ, int a_SizeX, int a_SizeZ, int * a_Values) override
+	{
+		// Generate the underlying data:
+		m_Underlying->GetInts(a_MinX, a_MinZ, a_SizeX, a_SizeZ, a_Values);
+
+		// Change some of the biome groups into rare biome groups:
+		for (int z = 0; z < a_SizeZ; z++)
+		{
+			for (int x = 0; x < a_SizeX; x++)
+			{
+				int rnd = super::m_Noise.IntNoise2DInt(x + a_MinX, z + a_MinZ) / 7;
+				if (rnd % 1000 < m_Chance)
+				{
+					int idx = x + a_SizeX * z;
+					a_Values[idx] = a_Values[idx] | bgfRare;
+				}
+			}
+		}
+	}
+
+protected:
+	/** Chance, in permille, of changing each pixel into the rare biome group. */
+	int m_Chance;
+
+	/** The underlying generator. */
+	Underlying m_Underlying;
+};
+
+
+
+
+
+/** Changes biomes in the parent data into an alternate versions (usually "hill" variants), in such places
+that have their alterations set. */
+class cProtIntGenAlternateBiomes:
+	public cProtIntGenWithNoise
+{
+	typedef cProtIntGenWithNoise super;
+
+public:
+	cProtIntGenAlternateBiomes(int a_Seed, Underlying a_Alterations, Underlying a_BaseBiomes):
+		super(a_Seed),
+		m_Alterations(a_Alterations),
+		m_BaseBiomes(a_BaseBiomes)
+	{
+	}
+
+
+	virtual void GetInts(int a_MinX, int a_MinZ, int a_SizeX, int a_SizeZ, int * a_Values) override
+	{
+		// Generate the base biomes and the alterations:
+		m_BaseBiomes->GetInts(a_MinX, a_MinZ, a_SizeX, a_SizeZ, a_Values);
+		int alterations[m_BufferSize];
+		m_Alterations->GetInts(a_MinX, a_MinZ, a_SizeX, a_SizeZ, alterations);
+
+		// Change the biomes into their alternate versions:
+		int len = a_SizeX * a_SizeZ;
+		for (int idx = 0; idx < len; ++idx)
+		{
+			if (alterations[idx] == 0)
+			{
+				// No change
+				continue;
+			}
+
+			// Change to alternate biomes:
+			int val = a_Values[idx];
+			switch (val)
+			{
+				case biBirchForest:   val = biBirchForestHills; break;
+				case biDesert:        val = biDesertHills;      break;
+				case biExtremeHills:  val = biExtremeHillsPlus; break;
+				case biForest:        val = biForestHills;      break;
+				case biIcePlains:     val = biIceMountains;     break;
+				case biJungle:        val = biJungleHills;      break;
+				case biMegaTaiga:     val = biMegaTaigaHills;   break;
+				case biMesaPlateau:   val = biMesa;             break;
+				case biMesaPlateauF:  val = biMesa;             break;
+				case biMesaPlateauM:  val = biMesa;             break;
+				case biMesaPlateauFM: val = biMesa;             break;
+				case biPlains:        val = biForest;           break;
+				case biRoofedForest:  val = biPlains;           break;
+				case biSavanna:       val = biSavannaPlateau;   break;
+				case biTaiga:         val = biTaigaHills;       break;
+			}
+			a_Values[idx] = val;
+		}  // for idx - a_Values[]
+	}
+
+protected:
+	Underlying m_Alterations;
+	Underlying m_BaseBiomes;
+};
+
+
+
+
+
+/** Adds an edge between two specifically incompatible biomes, such as mesa and forest. */
+class cProtIntGenBiomeEdges:
+	public cProtIntGenWithNoise
+{
+	typedef cProtIntGenWithNoise super;
+
+public:
+	cProtIntGenBiomeEdges(int a_Seed, Underlying a_Underlying):
+		super(a_Seed),
+		m_Underlying(a_Underlying)
+	{
+	}
+
+
+	virtual void GetInts(int a_MinX, int a_MinZ, int a_SizeX, int a_SizeZ, int * a_Values) override
+	{
+		// Generate the underlying biomes:
+		int lowerSizeX = a_SizeX + 2;
+		int lowerSizeZ = a_SizeZ + 2;
+		ASSERT(lowerSizeX * lowerSizeZ <= m_BufferSize);
+		int lowerValues[m_BufferSize];
+		m_Underlying->GetInts(a_MinX - 1, a_MinZ - 1, lowerSizeX, lowerSizeZ, lowerValues);
+
+		// Convert incompatible edges into neutral biomes:
+		for (int z = 0; z < a_SizeZ; z++)
+		{
+			for (int x = 0; x < a_SizeX; x++)
+			{
+				int biome = lowerValues[x + 1 + (z + 1) * lowerSizeX];
+				int above = lowerValues[x + 1 + z *       lowerSizeX];
+				int below = lowerValues[x + 1 + (z + 2) * lowerSizeX];
+				int left  = lowerValues[x +     (z + 1) * lowerSizeX];
+				int right = lowerValues[x + 2 + (z + 1) * lowerSizeX];
+
+				switch (biome)
+				{
+					case biDesert:
+					case biDesertM:
+					case biDesertHills:
+					{
+						if (
+							IsBiomeVeryCold(static_cast<EMCSBiome>(above)) ||
+							IsBiomeVeryCold(static_cast<EMCSBiome>(below)) ||
+							IsBiomeVeryCold(static_cast<EMCSBiome>(left))  ||
+							IsBiomeVeryCold(static_cast<EMCSBiome>(right))
+						)
+						{
+							biome = biPlains;
+						}
+						break;
+					}  // case biDesert
+
+					case biMesaPlateau:
+					case biMesaPlateauF:
+					case biMesaPlateauFM:
+					case biMesaPlateauM:
+					{
+						if (
+							!isMesaCompatible(above) ||
+							!isMesaCompatible(below) ||
+							!isMesaCompatible(left)  ||
+							!isMesaCompatible(right)
+						)
+						{
+							biome = biDesert;
+						}
+						break;
+					}  // Mesa biomes
+
+					case biJungle:
+					case biJungleM:
+					{
+						if (
+							!isJungleCompatible(above) ||
+							!isJungleCompatible(below) ||
+							!isJungleCompatible(left)  ||
+							!isJungleCompatible(right)
+						)
+						{
+							biome = (biome == biJungle) ? biJungleEdge : biJungleEdgeM;
+						}
+						break;
+					}  // Jungle biomes
+
+					case biSwampland:
+					case biSwamplandM:
+					{
+						if (
+							IsBiomeNoDownfall(static_cast<EMCSBiome>(above)) ||
+							IsBiomeNoDownfall(static_cast<EMCSBiome>(below)) ||
+							IsBiomeNoDownfall(static_cast<EMCSBiome>(left))  ||
+							IsBiomeNoDownfall(static_cast<EMCSBiome>(right))
+						)
+						{
+							biome = biPlains;
+						}
+						break;
+					}  // Swampland biomes
+				}  // switch (biome)
+
+				a_Values[x + z * a_SizeX] = biome;
+			}  // for x
+		}  // for z
+	}
+
+
+protected:
+	Underlying m_Underlying;
+
+
+	bool isMesaCompatible(int a_Biome)
+	{
+		switch (a_Biome)
+		{
+			case biDesert:
+			case biMesa:
+			case biMesaBryce:
+			case biMesaPlateau:
+			case biMesaPlateauF:
+			case biMesaPlateauFM:
+			case biMesaPlateauM:
+			case biOcean:
+			case biDeepOcean:
+			{
+				return true;
+			}
+			default:
+			{
+				return false;
+			}
+		}
+	}
+
+
+	bool isJungleCompatible(int a_Biome)
+	{
+		switch (a_Biome)
+		{
+			case biJungle:
+			case biJungleM:
+			case biJungleEdge:
+			case biJungleEdgeM:
+			case biJungleHills:
+			{
+				return true;
+			}
+			default:
+			{
+				return false;
+			}
+		}
+	}
+};
+
+
+
+
+
+/** Changes biomes in the parent data into their alternate versions ("M" variants), in such places that
+have their alterations set. */
+class cProtIntGenMBiomes:
+	public cProtIntGenWithNoise
+{
+	typedef cProtIntGenWithNoise super;
+
+public:
+	cProtIntGenMBiomes(int a_Seed, Underlying a_Alteration, Underlying a_Underlying):
+		super(a_Seed),
+		m_Underlying(a_Underlying),
+		m_Alteration(a_Alteration)
+	{
+	}
+
+
+	virtual void GetInts(int a_MinX, int a_MinZ, int a_SizeX, int a_SizeZ, int * a_Values) override
+	{
+		// Generate the underlying biomes and the alterations:
+		m_Underlying->GetInts(a_MinX, a_MinZ, a_SizeX, a_SizeZ, a_Values);
+		int alterations[m_BufferSize];
+		m_Alteration->GetInts(a_MinX, a_MinZ, a_SizeX, a_SizeZ, alterations);
+
+		// Wherever alterations are nonzero, change into alternate biome, if available:
+		int len = a_SizeX * a_SizeZ;
+		for (int idx = 0; idx < len; ++idx)
+		{
+			if (alterations[idx] == 0)
+			{
+				continue;
+			}
+
+			// Ice spikes biome was removed from here, because it was generated way too often
+			switch (a_Values[idx])
+			{
+				case biPlains:               a_Values[idx] = biSunflowerPlains;      break;
+				case biDesert:               a_Values[idx] = biDesertM;              break;
+				case biExtremeHills:         a_Values[idx] = biExtremeHillsM;        break;
+				case biForest:               a_Values[idx] = biFlowerForest;         break;
+				case biTaiga:                a_Values[idx] = biTaigaM;               break;
+				case biSwampland:            a_Values[idx] = biSwamplandM;           break;
+				case biJungle:               a_Values[idx] = biJungleM;              break;
+				case biJungleEdge:           a_Values[idx] = biJungleEdgeM;          break;
+				case biBirchForest:          a_Values[idx] = biBirchForestM;         break;
+				case biBirchForestHills:     a_Values[idx] = biBirchForestHillsM;    break;
+				case biRoofedForest:         a_Values[idx] = biRoofedForestM;        break;
+				case biColdTaiga:            a_Values[idx] = biColdTaigaM;           break;
+				case biMegaSpruceTaiga:      a_Values[idx] = biMegaSpruceTaiga;      break;
+				case biMegaSpruceTaigaHills: a_Values[idx] = biMegaSpruceTaigaHills; break;
+				case biExtremeHillsPlus:     a_Values[idx] = biExtremeHillsPlusM;    break;
+				case biSavanna:              a_Values[idx] = biSavannaM;             break;
+				case biSavannaPlateau:       a_Values[idx] = biSavannaPlateauM;      break;
+				case biMesa:                 a_Values[idx] = biMesaBryce;            break;
+				case biMesaPlateauF:         a_Values[idx] = biMesaPlateauFM;        break;
+				case biMesaPlateau:          a_Values[idx] = biMesaBryce;            break;
+			}
+		}  // for idx - a_Values[] / alterations[]
+	}
+
+protected:
+	Underlying m_Underlying;
+	Underlying m_Alteration;
+};
+
+
+
+
diff --git a/src/Generating/Ravines.h b/src/Generating/Ravines.h
index 3e41c5ce6..b11037433 100644
--- a/src/Generating/Ravines.h
+++ b/src/Generating/Ravines.h
@@ -10,7 +10,6 @@
 #pragma once
 
 #include "GridStructGen.h"
-#include "../Noise.h"
 
 
 
diff --git a/src/Generating/ShapeGen.cpp b/src/Generating/ShapeGen.cpp
new file mode 100644
index 000000000..45a9c3b93
--- /dev/null
+++ b/src/Generating/ShapeGen.cpp
@@ -0,0 +1,145 @@
+
+// ShapeGen.cpp
+
+// Implements the function to create a cTerrainShapeGen descendant based on INI file settings
+
+#include "Globals.h"
+#include "HeiGen.h"
+#include "../IniFile.h"
+#include "DistortedHeightmap.h"
+#include "EndGen.h"
+#include "Noise3DGenerator.h"
+#include "TwoHeights.h"
+
+
+
+
+
+////////////////////////////////////////////////////////////////////////////////
+// cTerrainHeightToShapeGen:
+
+/** Converts old-style height-generators into new-style shape-generators. */
+class cTerrainHeightToShapeGen:
+	public cTerrainShapeGen
+{
+public:
+	cTerrainHeightToShapeGen(cTerrainHeightGenPtr a_HeightGen):
+		m_HeightGen(a_HeightGen)
+	{
+	}
+
+
+	// cTerrainShapeGen overrides:
+	virtual void GenShape(int a_ChunkX, int a_ChunkZ, cChunkDesc::Shape & a_Shape) override
+	{
+		// Generate the heightmap:
+		cChunkDef::HeightMap heightMap;
+		m_HeightGen->GenHeightMap(a_ChunkX, a_ChunkZ, heightMap);
+
+		// Convert from heightmap to shape:
+		for (int z = 0; z < cChunkDef::Width; z++)
+		{
+			for (int x = 0; x < cChunkDef::Width; x++)
+			{
+				HEIGHTTYPE height = cChunkDef::GetHeight(heightMap, x, z) + 1;
+				Byte * shapeColumn = &(a_Shape[(x + 16 * z) * 256]);
+				for (int y = 0; y < height; y++)
+				{
+					shapeColumn[y] = 1;
+				}
+				for (int y = height; y < cChunkDef::Height; y++)
+				{
+					shapeColumn[y] = 0;
+				}
+			}  // for x
+		}  // for z
+	}
+
+
+	virtual void InitializeShapeGen(cIniFile & a_IniFile) override
+	{
+		m_HeightGen->InitializeHeightGen(a_IniFile);
+	}
+
+protected:
+	/** The height generator being converted. */
+	cTerrainHeightGenPtr m_HeightGen;
+};
+
+typedef SharedPtr<cTerrainHeightToShapeGen> cTerrainHeightToShapeGenPtr;
+
+
+
+
+
+////////////////////////////////////////////////////////////////////////////////
+// cTerrainShapeGen:
+
+cTerrainShapeGenPtr cTerrainShapeGen::CreateShapeGen(cIniFile & a_IniFile, cBiomeGenPtr a_BiomeGen, int a_Seed, bool & a_CacheOffByDefault)
+{
+	AString shapeGenName = a_IniFile.GetValueSet("Generator", "ShapeGen", "");
+	if (shapeGenName.empty())
+	{
+		LOGWARN("[Generator] ShapeGen value not set in world.ini, using \"BiomalNoise3D\".");
+		shapeGenName = "BiomalNoise3D";
+	}
+	
+	// If the shapegen is HeightMap, redirect to older HeightMap-based generators:
+	if (NoCaseCompare(shapeGenName, "HeightMap") == 0)
+	{
+		cTerrainHeightGenPtr heightGen = cTerrainHeightGen::CreateHeightGen(a_IniFile, a_BiomeGen, a_Seed, a_CacheOffByDefault);
+		if (heightGen != nullptr)
+		{
+			return std::make_shared<cTerrainHeightToShapeGen>(heightGen);
+		}
+
+		// The height gen was not recognized; several heightgens were promoted to shape gens, so let's try them instead:
+		shapeGenName = a_IniFile.GetValue("Generator", "HeightGen", "");
+		if (shapeGenName.empty())
+		{
+			LOGWARNING("[Generator] ShapeGen set to HeightMap, but HeightGen not set. Reverting to \"BiomalNoise3D\".");
+			shapeGenName = "BiomalNoise3D";
+			a_IniFile.SetValue("Generator", "ShapeGen", shapeGenName);
+		}
+	}
+
+	// Choose the shape generator based on the name:
+	a_CacheOffByDefault = false;
+	cTerrainShapeGenPtr res;
+	if (NoCaseCompare(shapeGenName, "DistortedHeightmap") == 0)
+	{
+		res = std::make_shared<cDistortedHeightmap>(a_Seed, a_BiomeGen);
+	}
+	else if (NoCaseCompare(shapeGenName, "End") == 0)
+	{
+		res = std::make_shared<cEndGen>(a_Seed);
+	}
+	else if (NoCaseCompare(shapeGenName, "BiomalNoise3D") == 0)
+	{
+		res = std::make_shared<cBiomalNoise3DComposable>(a_Seed, a_BiomeGen);
+	}
+	else if (NoCaseCompare(shapeGenName, "Noise3D") == 0)
+	{
+		res = std::make_shared<cNoise3DComposable>(a_Seed);
+	}
+	else if (NoCaseCompare(shapeGenName, "TwoHeights") == 0)
+	{
+		res = CreateShapeGenTwoHeights(a_Seed, a_BiomeGen);
+	}
+	else
+	{
+		// No match found, force-set the default and retry
+		LOGWARN("Unknown ShapeGen \"%s\", using \"BiomalNoise3D\" instead.", shapeGenName.c_str());
+		a_IniFile.SetValue("Generator", "ShapeGen", "BiomalNoise3D");
+		return CreateShapeGen(a_IniFile, a_BiomeGen, a_Seed, a_CacheOffByDefault);
+	}
+	
+	// Read the settings:
+	res->InitializeShapeGen(a_IniFile);
+	
+	return res;
+}
+
+
+
+
diff --git a/src/Generating/StructGen.cpp b/src/Generating/StructGen.cpp
index bdefcd8c1..2f685c808 100644
--- a/src/Generating/StructGen.cpp
+++ b/src/Generating/StructGen.cpp
@@ -37,10 +37,13 @@ void cStructGenTrees::GenFinish(cChunkDesc & a_ChunkDesc)
 				Dest = &WorkerDesc;
 				WorkerDesc.SetChunkCoords(BaseX, BaseZ);
 				
+				// TODO: This may cause a lot of wasted calculations, instead of pulling data out of a single (cChunkDesc) cache
+
+				cChunkDesc::Shape workerShape;
 				m_BiomeGen->GenBiomes           (BaseX, BaseZ, WorkerDesc.GetBiomeMap());
-				m_HeightGen->GenHeightMap       (BaseX, BaseZ, WorkerDesc.GetHeightMap());
-				m_CompositionGen->ComposeTerrain(WorkerDesc);
-				// TODO: Free the entity lists
+				m_ShapeGen->GenShape            (BaseX, BaseZ, workerShape);
+				WorkerDesc.SetHeightFromShape   (workerShape);
+				m_CompositionGen->ComposeTerrain(WorkerDesc, workerShape);
 			}
 			else
 			{
@@ -97,7 +100,7 @@ void cStructGenTrees::GenerateSingleTree(
 	
 	int Height = a_ChunkDesc.GetHeight(x, z);
 	
-	if ((Height <= 0) || (Height > 240))
+	if ((Height <= 0) || (Height >= 230))
 	{
 		return;
 	}
@@ -125,6 +128,11 @@ void cStructGenTrees::GenerateSingleTree(
 			// Outside the chunk
 			continue;
 		}
+		if (itr->y >= cChunkDef::Height)
+		{
+			// Above the chunk, cut off (this shouldn't happen too often, we're limiting trees to y < 230)
+			continue;
+		}
 
 		BLOCKTYPE Block = a_ChunkDesc.GetBlockType(itr->x, itr->y, itr->z);
 		switch (Block)
@@ -159,7 +167,7 @@ void cStructGenTrees::ApplyTreeImage(
 	// Put the generated image into a_BlockTypes, push things outside this chunk into a_Blocks
 	for (sSetBlockVector::const_iterator itr = a_Image.begin(), end = a_Image.end(); itr != end; ++itr)
 	{
-		if ((itr->ChunkX == a_ChunkX) && (itr->ChunkZ == a_ChunkZ))
+		if ((itr->ChunkX == a_ChunkX) && (itr->ChunkZ == a_ChunkZ) && (itr->y < cChunkDef::Height))
 		{
 			// Inside this chunk, integrate into a_ChunkDesc:
 			switch (a_ChunkDesc.GetBlockType(itr->x, itr->y, itr->z))
@@ -390,7 +398,7 @@ void cStructGenLakes::GenFinish(cChunkDesc & a_ChunkDesc)
 		}
 		
 		cBlockArea Lake;
-		CreateLakeImage(ChunkX + x, ChunkZ + z, Lake);
+		CreateLakeImage(ChunkX + x, ChunkZ + z, a_ChunkDesc.GetMinHeight(), Lake);
 		
 		int OfsX = Lake.GetOriginX() + x * cChunkDef::Width;
 		int OfsZ = Lake.GetOriginZ() + z * cChunkDef::Width;
@@ -404,25 +412,13 @@ void cStructGenLakes::GenFinish(cChunkDesc & a_ChunkDesc)
 
 
 
-void cStructGenLakes::CreateLakeImage(int a_ChunkX, int a_ChunkZ, cBlockArea & a_Lake)
+void cStructGenLakes::CreateLakeImage(int a_ChunkX, int a_ChunkZ, int a_MaxLakeHeight, cBlockArea & a_Lake)
 {
 	a_Lake.Create(16, 8, 16);
 	a_Lake.Fill(cBlockArea::baTypes, E_BLOCK_SPONGE);  // Sponge is the NOP blocktype for lake merging strategy
 	
-	// Find the minimum height in this chunk:
-	cChunkDef::HeightMap HeightMap;
-	m_HeiGen->GenHeightMap(a_ChunkX, a_ChunkZ, HeightMap);
-	HEIGHTTYPE MinHeight = HeightMap[0];
-	for (size_t i = 1; i < ARRAYCOUNT(HeightMap); i++)
-	{
-		if (HeightMap[i] < MinHeight)
-		{
-			MinHeight = HeightMap[i];
-		}
-	}
-	
 	// Make a random position in the chunk by using a random 16 block XZ offset and random height up to chunk's max height minus 6
-	MinHeight = std::max(MinHeight - 6, 2);
+	int MinHeight = std::max(a_MaxLakeHeight - 6, 2);
 	int Rnd = m_Noise.IntNoise3DInt(a_ChunkX, 128, a_ChunkZ) / 11;
 	// Random offset [-8 .. 8], with higher probability around 0; add up four three-bit-wide randoms [0 .. 28], divide and subtract to get range
 	int OffsetX = 4 * ((Rnd & 0x07) + ((Rnd & 0x38) >> 3) + ((Rnd & 0x1c0) >> 6) + ((Rnd & 0xe00) >> 9)) / 7 - 8;
diff --git a/src/Generating/StructGen.h b/src/Generating/StructGen.h
index 906fdd722..796abf0f5 100644
--- a/src/Generating/StructGen.h
+++ b/src/Generating/StructGen.h
@@ -14,7 +14,7 @@
 #pragma once
 
 #include "ComposableGenerator.h"
-#include "../Noise.h"
+#include "../Noise/Noise.h"
 
 
 
@@ -24,11 +24,11 @@ class cStructGenTrees :
 	public cFinishGen
 {
 public:
-	cStructGenTrees(int a_Seed, cBiomeGenPtr a_BiomeGen, cTerrainHeightGenPtr a_HeightGen, cTerrainCompositionGenPtr a_CompositionGen) :
+	cStructGenTrees(int a_Seed, cBiomeGenPtr a_BiomeGen, cTerrainShapeGenPtr a_ShapeGen, cTerrainCompositionGenPtr a_CompositionGen) :
 		m_Seed(a_Seed),
 		m_Noise(a_Seed),
 		m_BiomeGen(a_BiomeGen),
-		m_HeightGen(a_HeightGen),
+		m_ShapeGen(a_ShapeGen),
 		m_CompositionGen(a_CompositionGen)
 	{}
 	
@@ -37,12 +37,12 @@ protected:
 	int m_Seed;
 	cNoise m_Noise;
 	cBiomeGenPtr              m_BiomeGen;
-	cTerrainHeightGenPtr      m_HeightGen;
+	cTerrainShapeGenPtr       m_ShapeGen;
 	cTerrainCompositionGenPtr m_CompositionGen;
 	
 	/** Generates and applies an image of a single tree.
-	Parts of the tree inside the chunk are applied to a_BlockX.
-	Parts of the tree outside the chunk are stored in a_OutsideX
+	Parts of the tree inside the chunk are applied to a_ChunkDesc.
+	Parts of the tree outside the chunk are stored in a_OutsideXYZ
 	*/
 	void GenerateSingleTree(
 		int a_ChunkX, int a_ChunkZ, int a_Seq,
@@ -51,7 +51,7 @@ protected:
 		sSetBlockVector & a_OutsideOther
 	) ;
 	
-	/// Applies an image into chunk blockdata; all blocks outside the chunk will be appended to a_Overflow
+	/** Applies an image into chunk blockdata; all blocks outside the chunk will be appended to a_Overflow. */
 	void ApplyTreeImage(
 		int a_ChunkX, int a_ChunkZ,
 		cChunkDesc & a_ChunkDesc,
@@ -124,27 +124,30 @@ class cStructGenLakes :
 	public cFinishGen
 {
 public:
-	cStructGenLakes(int a_Seed, BLOCKTYPE a_Fluid, cTerrainHeightGenPtr a_HeiGen, int a_Probability) :
+	cStructGenLakes(int a_Seed, BLOCKTYPE a_Fluid, cTerrainShapeGenPtr a_ShapeGen, int a_Probability) :
 		m_Noise(a_Seed),
 		m_Seed(a_Seed),
 		m_Fluid(a_Fluid),
-		m_HeiGen(a_HeiGen),
+		m_ShapeGen(a_ShapeGen),
 		m_Probability(a_Probability)
 	{
 	}
 	
 protected:
-	cNoise               m_Noise;
-	int                  m_Seed;
-	BLOCKTYPE            m_Fluid;
-	cTerrainHeightGenPtr m_HeiGen;
-	int                  m_Probability;  ///< Chance, 0 .. 100, of a chunk having the lake
+	cNoise              m_Noise;
+	int                 m_Seed;
+	BLOCKTYPE           m_Fluid;
+	cTerrainShapeGenPtr m_ShapeGen;
+
+	/** Chance, [0 .. 100], of a chunk having the lake. */
+	int m_Probability;
 	
+
 	// cFinishGen override:
 	virtual void GenFinish(cChunkDesc & a_ChunkDesc) override;
 	
-	/// Creates a lake image for the specified chunk into a_Lake
-	void CreateLakeImage(int a_ChunkX, int a_ChunkZ, cBlockArea & a_Lake);
+	/** Creates a lake image for the specified chunk into a_Lake. */
+	void CreateLakeImage(int a_ChunkX, int a_ChunkZ, int a_MaxLakeHeight, cBlockArea & a_Lake);
 } ;
 
 
diff --git a/src/Generating/Trees.cpp b/src/Generating/Trees.cpp
index 7fd6d6f07..be8b0cd6b 100644
--- a/src/Generating/Trees.cpp
+++ b/src/Generating/Trees.cpp
@@ -61,7 +61,7 @@ static const sCoords BigO3[] =
 
 static const sCoords BigO4[] =  // Part of Big Jungle tree
 {
-	/* -4 */                    {-2, -4}, {-1, -4}, {0, -4}, {1, -4}, {2, -4},
+	/* -4 */                     {-2, -4}, {-1, -4}, {0, -4}, {1, -4}, {2, -4},
 	/* -3 */           {-3, -3}, {-2, -3}, {-1, -3}, {0, -3}, {1, -3}, {2, -3}, {3, -3},
 	/* -2 */ {-4, -2}, {-3, -2}, {-2, -2}, {-1, -2}, {0, -2}, {1, -2}, {2, -2}, {3, -2}, {4, -2},
 	/* -1 */ {-4, -1}, {-3, -1}, {-2, -1}, {-1, -1}, {0, -1}, {1, -1}, {2, -1}, {3, -1}, {4, -1},
@@ -361,7 +361,109 @@ void GetSmallAppleTreeImage(int a_BlockX, int a_BlockY, int a_BlockZ, cNoise & a
 
 void GetLargeAppleTreeImage(int a_BlockX, int a_BlockY, int a_BlockZ, cNoise & a_Noise, int a_Seq, sSetBlockVector & a_LogBlocks, sSetBlockVector & a_OtherBlocks)
 {
-	// TODO
+	int Height = 7 + a_Noise.IntNoise3DInt(a_BlockX, a_BlockY, a_BlockZ) % 4;
+
+	// Array with possible directions for a branch to go to.
+	const Vector3d AvailableDirections[] =
+	{
+		{ -1, 0, 0 }, { 0, 0, -1  },
+		{ -1, 0, 1 }, { -1, 0, -1 },
+		{ 1, 0, 1  }, { 1, 0, -1  },
+		{ 1, 0, 0  }, { 0, 0, 1   },
+
+		{ -0.5, 0, 0   }, { 0, 0, -0.5    },
+		{ -0.5, 0, 0.5 }, { -0.5, 0, -0.5 },
+		{ 0.5, 0, 0.5  }, { 0.5, 0, -0.5  },
+		{ 0.5, 0, 0    }, { 0, 0, 0.5     },
+
+		{ -1, 0.5, 0 }, { 0, 0.5, -1  },
+		{ -1, 0.5, 1 }, { -1, 0.5, -1 },
+		{ 1, 0.5, 1  }, { 1, 0.5, -1  },
+		{ 1, 0.5, 0  }, { 0, 0.5, 1   },
+
+		{ -0.5, 0.5, 0   },  { 0, 0.5, -0.5    },
+		{ -0.5, 0.5, 0.5 },  { -0.5, 0.5, -0.5 },
+		{ 0.5, 0.5, 0.5  },  { 0.5, 0.5, -0.5  },
+		{ 0.5, 0.5, 0    },  { 0, 0.5, 0.5     },
+
+	};
+
+	// Create branches
+	for (int i = 4; i < Height; i++)
+	{
+		// Get a direction for the trunk to go to.
+		Vector3d BranchStartDirection = AvailableDirections[a_Noise.IntNoise3DInt(a_BlockX, a_BlockY + i, a_BlockZ) % ARRAYCOUNT(AvailableDirections)];
+		Vector3d BranchDirection = AvailableDirections[a_Noise.IntNoise3DInt(a_BlockX, a_BlockY / i, a_BlockZ) % ARRAYCOUNT(AvailableDirections)] / 3;
+
+		int BranchLength = 2 + a_Noise.IntNoise3DInt(a_BlockX * a_Seq, a_BlockY * a_Seq, a_BlockZ * a_Seq) % 3;
+		GetLargeAppleTreeBranch(a_BlockX, a_BlockY + i, a_BlockZ, BranchLength, BranchStartDirection, BranchDirection, a_BlockY + Height, a_Noise, a_LogBlocks);
+	}
+
+	// Place leaves around each log block
+	for (auto itr : a_LogBlocks)
+	{
+		// Get the log's X and Z coordinates
+		int X = itr.ChunkX * 16 + itr.x;
+		int Z = itr.ChunkZ * 16 + itr.z;
+
+		a_OtherBlocks.push_back(sSetBlock(X, itr.y - 2, Z, E_BLOCK_LEAVES, E_META_LEAVES_APPLE));
+		PushCoordBlocks(X, itr.y - 2, Z, a_OtherBlocks, BigO1, ARRAYCOUNT(BigO1), E_BLOCK_LEAVES, E_META_LEAVES_APPLE);
+		for (int y = -1; y <= 1; y++)
+		{
+			PushCoordBlocks (X, itr.y + y, Z, a_OtherBlocks, BigO2, ARRAYCOUNT(BigO2), E_BLOCK_LEAVES, E_META_LEAVES_APPLE);
+		}
+		PushCoordBlocks(X, itr.y + 2, Z, a_OtherBlocks, BigO1, ARRAYCOUNT(BigO1), E_BLOCK_LEAVES, E_META_LEAVES_APPLE);
+		a_OtherBlocks.push_back(sSetBlock(X, itr.y + 2, Z, E_BLOCK_LEAVES, E_META_LEAVES_APPLE));
+	}
+
+	// Trunk:
+	for (int i = 0; i < Height; i++)
+	{
+		a_LogBlocks.push_back(sSetBlock(a_BlockX, a_BlockY + i, a_BlockZ, E_BLOCK_LOG, E_META_LOG_APPLE));
+	}
+}
+
+
+
+
+
+void GetLargeAppleTreeBranch(int a_BlockX, int a_BlockY, int a_BlockZ, int a_BranchLength, Vector3d a_StartDirection, Vector3d a_Direction, int a_TreeHeight, cNoise & a_Noise, sSetBlockVector & a_LogBlocks)
+{
+	Vector3d CurrentPos = Vector3d(a_BlockX, a_BlockY, a_BlockZ);
+	Vector3d Direction  = a_StartDirection;
+	for (int i = 0; i < a_BranchLength; i++)
+	{
+		CurrentPos += Direction;
+		if (CurrentPos.y >= a_TreeHeight)
+		{
+			return;
+		}
+		Direction -= a_Direction;
+		Direction.clamp(-1.0, 1.0);
+		a_LogBlocks.push_back(sSetBlock(FloorC(CurrentPos.x), FloorC(CurrentPos.y), FloorC(CurrentPos.z), E_BLOCK_LOG, GetLogMetaFromDirection(E_META_LOG_APPLE, Direction)));
+	}
+}
+
+
+
+
+
+NIBBLETYPE GetLogMetaFromDirection(NIBBLETYPE a_BlockMeta, Vector3d a_Direction)
+{
+	a_Direction.abs();
+
+	if ((a_Direction.y > a_Direction.x) && (a_Direction.y > a_Direction.z))
+	{
+		return a_BlockMeta;
+	}
+	else if (a_Direction.x > a_Direction.z)
+	{
+		return a_BlockMeta + 4;
+	}
+	else
+	{
+		return a_BlockMeta + 8;
+	}
 }
 
 
diff --git a/src/Generating/Trees.h b/src/Generating/Trees.h
index c9eb7de80..a2c8274f5 100644
--- a/src/Generating/Trees.h
+++ b/src/Generating/Trees.h
@@ -18,7 +18,7 @@ logs can overwrite others(leaves), but others shouldn't overwrite logs. This is
 #pragma once
 
 #include "../ChunkDef.h"
-#include "../Noise.h"
+#include "../Noise/Noise.h"
 
 
 
@@ -62,6 +62,12 @@ void GetSmallAppleTreeImage(int a_BlockX, int a_BlockY, int a_BlockZ, cNoise & a
 /// Generates an image of a large (branching) apple tree
 void GetLargeAppleTreeImage(int a_BlockX, int a_BlockY, int a_BlockZ, cNoise & a_Noise, int a_Seq, sSetBlockVector & a_LogBlocks, sSetBlockVector & a_OtherBlocks);
 
+/// Generates a branch for a large apple tree
+void GetLargeAppleTreeBranch(int a_BlockX, int a_BlockY, int a_BlockZ, int a_BranchLength, Vector3d a_StartDirection, Vector3d a_Direction, int a_TreeHeight, cNoise & a_Noise, sSetBlockVector & a_LogBlocks);
+
+/// Returns the meta for a log from the given direction
+NIBBLETYPE GetLogMetaFromDirection(NIBBLETYPE a_BlockMeta, Vector3d a_Direction);
+
 /// Generates an image of a random birch tree
 void GetBirchTreeImage(int a_BlockX, int a_BlockY, int a_BlockZ, cNoise & a_Noise, int a_Seq, sSetBlockVector & a_LogBlocks, sSetBlockVector & a_OtherBlocks);
 
diff --git a/src/Generating/TwoHeights.cpp b/src/Generating/TwoHeights.cpp
new file mode 100644
index 000000000..e75c301de
--- /dev/null
+++ b/src/Generating/TwoHeights.cpp
@@ -0,0 +1,121 @@
+
+// TwoHeights.cpp
+
+// Implements the cTwoHeights class representing the terrain shape generator using two switched heightmaps
+
+#include "Globals.h"
+#include "TwoHeights.h"
+#include "../Noise/InterpolNoise.h"
+#include "HeiGen.h"
+#include "../LinearUpscale.h"
+#include "../IniFile.h"
+
+
+
+
+
+class cTwoHeights:
+	public cTerrainShapeGen
+{
+	typedef cTerrainShapeGen super;
+public:
+	cTwoHeights(int a_Seed, cBiomeGenPtr a_BiomeGen):
+		m_Seed(a_Seed),
+		m_Choice(a_Seed),
+		m_HeightA(a_Seed + 1, a_BiomeGen),
+		m_HeightB(a_Seed + 2, a_BiomeGen)
+	{
+	}
+
+
+	// cTerrainShapeGen override:
+	virtual void GenShape(int a_ChunkX, int a_ChunkZ, cChunkDesc::Shape & a_Shape) override
+	{
+		// Generate the two heightmaps:
+		cChunkDef::HeightMap heightsA;
+		cChunkDef::HeightMap heightsB;
+		m_HeightA.GenHeightMap(a_ChunkX, a_ChunkZ, heightsA);
+		m_HeightB.GenHeightMap(a_ChunkX, a_ChunkZ, heightsB);
+
+		// Generate the choice noise:
+		NOISE_DATATYPE smallChoice[33 * 5 * 5];
+		NOISE_DATATYPE workspace[33 * 5 * 5];
+		NOISE_DATATYPE startX = 0;
+		NOISE_DATATYPE endX = 256 * m_FrequencyY;
+		NOISE_DATATYPE startY =  a_ChunkX * cChunkDef::Width * m_FrequencyX;
+		NOISE_DATATYPE endY   = (a_ChunkX * cChunkDef::Width + cChunkDef::Width + 1) * m_FrequencyX;
+		NOISE_DATATYPE startZ =  a_ChunkZ * cChunkDef::Width * m_FrequencyZ;
+		NOISE_DATATYPE endZ   = (a_ChunkZ * cChunkDef::Width + cChunkDef::Width + 1) * m_FrequencyZ;
+		m_Choice.Generate3D(smallChoice, 33, 5, 5, startX, endX, startY, endY, startZ, endZ, workspace);
+		NOISE_DATATYPE choice[257 * 17 * 17];
+		LinearUpscale3DArray(smallChoice, 33, 5, 5, choice, 8, 4, 4);
+
+		// Generate the shape:
+		int idxShape = 0;
+		for (int z = 0; z < cChunkDef::Width; z++)
+		{
+			for (int x = 0; x < cChunkDef::Width; x++)
+			{
+				int idxChoice = 257 * 17 * z + 257 * x;
+				NOISE_DATATYPE heightA = static_cast<NOISE_DATATYPE>(cChunkDef::GetHeight(heightsA, x, z));
+				NOISE_DATATYPE heightB = static_cast<NOISE_DATATYPE>(cChunkDef::GetHeight(heightsB, x, z));
+				for (int y = 0; y < cChunkDef::Height; y++)
+				{
+					int height = static_cast<int>(ClampedLerp(heightA, heightB, choice[idxChoice++]));
+					a_Shape[idxShape++] = (y < height) ? 1 : 0;
+				}
+			}  // for x
+		}  // for z
+	}
+
+
+	virtual void InitializeShapeGen(cIniFile & a_IniFile)
+	{
+		m_FrequencyX = static_cast<NOISE_DATATYPE>(a_IniFile.GetValueSetF("Generator", "TwoHeightsFrequencyX", 40));
+		m_FrequencyY = static_cast<NOISE_DATATYPE>(a_IniFile.GetValueSetF("Generator", "TwoHeightsFrequencyY", 40));
+		m_FrequencyZ = static_cast<NOISE_DATATYPE>(a_IniFile.GetValueSetF("Generator", "TwoHeightsFrequencyZ", 40));
+
+		// Initialize the two underlying height generators from an empty INI file:
+		cIniFile empty;
+		m_HeightA.InitializeHeightGen(empty);
+		m_HeightB.InitializeHeightGen(empty);
+
+		// Add the choice octaves:
+		NOISE_DATATYPE freq = 0.001f;
+		NOISE_DATATYPE ampl = 1;
+		for (int i = 0; i < 4; i++)
+		{
+			m_Choice.AddOctave(freq, ampl);
+			freq = freq * 2;
+			ampl = ampl / 2;
+		}
+	}
+
+protected:
+	int m_Seed;
+
+	/** The noise used to decide between the two heightmaps. */
+	cOctavedNoise<cInterpolNoise<Interp5Deg>> m_Choice;
+
+	/** The first height generator. */
+	cHeiGenBiomal m_HeightA;
+
+	/** The second height generator. */
+	cHeiGenBiomal m_HeightB;
+
+	/** The base frequencies for m_Choice in each of the world axis directions. */
+	NOISE_DATATYPE m_FrequencyX, m_FrequencyY, m_FrequencyZ;
+};
+
+
+
+
+
+cTerrainShapeGenPtr CreateShapeGenTwoHeights(int a_Seed, cBiomeGenPtr a_BiomeGen)
+{
+	return std::make_shared<cTwoHeights>(a_Seed, a_BiomeGen);
+}
+
+
+
+
diff --git a/src/Generating/TwoHeights.h b/src/Generating/TwoHeights.h
new file mode 100644
index 000000000..353598011
--- /dev/null
+++ b/src/Generating/TwoHeights.h
@@ -0,0 +1,23 @@
+
+// TwoHeights.h
+
+// Declares the function to create a new instance of the cTwoHeights terrain shape generator
+
+
+
+
+
+#pragma once
+
+#include "ComposableGenerator.h"
+
+
+
+
+/** Creates and returns a new instance of the cTwoHeights terrain shape generator.
+The instance must be Initialize()-d before it is used. */
+extern cTerrainShapeGenPtr CreateShapeGenTwoHeights(int a_Seed, cBiomeGenPtr a_BiomeGen);
+
+
+
+
diff --git a/src/Generating/VillageGen.cpp b/src/Generating/VillageGen.cpp
index a9b359b6a..f7d9a8316 100644
--- a/src/Generating/VillageGen.cpp
+++ b/src/Generating/VillageGen.cpp
@@ -18,8 +18,8 @@
 
 /*
 How village generating works:
-By descending from a cGridStructGen, a semi-random grid is generated. A village may be generated for each of
-the grid's cells. Each cell checks the biomes in an entire chunk around it, only generating a village if all
+By descending from a cGridStructGen, a semi-random (jitter) grid is generated. A village may be generated for each
+of the grid's cells. Each cell checks the biomes in an entire chunk around it, only generating a village if all
 biomes are village-friendly. If yes, the entire village structure is built for that cell. If not, the cell
 is left village-less.
 
@@ -125,7 +125,7 @@ public:
 		m_Noise(a_Seed),
 		m_MaxSize(a_MaxSize),
 		m_Density(a_Density),
-		m_Borders(a_OriginX - a_MaxSize, 0, a_OriginZ - a_MaxSize, a_OriginX + a_MaxSize, 255, a_OriginZ + a_MaxSize),
+		m_Borders(a_OriginX - a_MaxSize, 0, a_OriginZ - a_MaxSize, a_OriginX + a_MaxSize, cChunkDef::Height - 1, a_OriginZ + a_MaxSize),
 		m_Prefabs(a_Prefabs),
 		m_HeightGen(a_HeightGen),
 		m_RoadBlock(a_RoadBlock),
diff --git a/src/Globals.h b/src/Globals.h
index 582f5fdaa..61f500db9 100644
--- a/src/Globals.h
+++ b/src/Globals.h
@@ -184,9 +184,9 @@ template class SizeChecker<UInt16, 2>;
 
 // OS-dependent stuff:
 #ifdef _WIN32
-	#define WIN32_LEAN_AND_MEAN
 
-	#define _WIN32_WINNT 0x501  // We want to target WinXP and higher
+	#define WIN32_LEAN_AND_MEAN
+	#define _WIN32_WINNT _WIN32_WINNT_WS03  // We want to target Windows XP with Service Pack 2 & Windows Server 2003 with Service Pack 1 and higher
 
 	#include <Windows.h>
 	#include <winsock2.h>
@@ -241,6 +241,7 @@ template class SizeChecker<UInt16, 2>;
 
 
 // STL stuff:
+#include <chrono>
 #include <vector>
 #include <list>
 #include <deque>
@@ -251,19 +252,20 @@ template class SizeChecker<UInt16, 2>;
 #include <set>
 #include <queue>
 #include <limits>
+#include <chrono>
+
 
 
 
 #ifndef TEST_GLOBALS
 	// Common headers (part 1, without macros):
 	#include "StringUtils.h"
-	#include "OSSupport/Sleep.h"
 	#include "OSSupport/CriticalSection.h"
 	#include "OSSupport/Semaphore.h"
 	#include "OSSupport/Event.h"
-	#include "OSSupport/Thread.h"
 	#include "OSSupport/File.h"
 	#include "Logger.h"
+	#include "OSSupport/StackTrace.h"
 #else
 	// Logging functions
 void inline LOGERROR(const char* a_Format, ...) FORMATSTRING(1, 2);
@@ -349,14 +351,14 @@ void inline LOGD(const char* a_Format, ...)
 
 #else
 	#ifdef  _DEBUG
-		#define ASSERT( x) ( !!(x) || ( LOGERROR("Assertion failed: %s, file %s, line %i", #x, __FILE__, __LINE__), assert(0), 0))
+		#define ASSERT( x) ( !!(x) || ( LOGERROR("Assertion failed: %s, file %s, line %i", #x, __FILE__, __LINE__), PrintStackTrace(), assert(0), 0))
 	#else
 		#define ASSERT(x) ((void)(x))
 	#endif
 #endif
 
 // Pretty much the same as ASSERT() but stays in Release builds
-#define VERIFY( x) ( !!(x) || ( LOGERROR("Verification failed: %s, file %s, line %i", #x, __FILE__, __LINE__), exit(1), 0))
+#define VERIFY( x) ( !!(x) || ( LOGERROR("Verification failed: %s, file %s, line %i", #x, __FILE__, __LINE__), PrintStackTrace(), exit(1), 0))
 
 // Same as assert but in all Self test builds
 #ifdef SELF_TEST
diff --git a/src/HTTPServer/HTTPFormParser.h b/src/HTTPServer/HTTPFormParser.h
index edc6d2471..d9d29d9bc 100644
--- a/src/HTTPServer/HTTPFormParser.h
+++ b/src/HTTPServer/HTTPFormParser.h
@@ -82,7 +82,7 @@ protected:
 	bool m_IsValid;
 	
 	/// The parser for the multipart data, if used
-	std::auto_ptr<cMultipartParser> m_MultipartParser;
+	std::unique_ptr<cMultipartParser> m_MultipartParser;
 	
 	/// Name of the currently parsed part in multipart data
 	AString m_CurrentPartName;
diff --git a/src/IniFile.cpp b/src/IniFile.cpp
index a666a4ff8..ded7e4199 100644
--- a/src/IniFile.cpp
+++ b/src/IniFile.cpp
@@ -9,7 +9,7 @@
 // Email:        Shane.Hill@dsto.defence.gov.au
 // Reason:       Remove dependancy on MFC. Code should compile on any
 //               platform.
-//////////////////////////////////////////////////////////////////////
+////////////////////////////////////////////////////////////////////////////////
 
 /*
 !! MODIFIED BY FAKETRUTH and xoft !!
@@ -79,7 +79,7 @@ bool cIniFile::ReadFile(const AString & a_FileName, bool a_AllowExampleRedirect)
 		}
 	}
 
-	bool IsFirstLine = true;  
+	bool IsFirstLine = true;
 
 	while (getline(f, line))
 	{
@@ -866,7 +866,7 @@ AString cIniFile::CheckCase(const AString & s) const
 
 void cIniFile::RemoveBom(AString & a_line) const
 {
-	// The BOM sequence for UTF-8 is 0xEF,0xBB,0xBF
+	// The BOM sequence for UTF-8 is 0xEF, 0xBB, 0xBF
 	static unsigned const char BOM[] = { 0xEF, 0xBB, 0xBF };
 
 	// The BOM sequence, if present, is always th e first three characters of the input.
diff --git a/src/IniFile.h b/src/IniFile.h
index 3f704551f..e5879f46c 100644
--- a/src/IniFile.h
+++ b/src/IniFile.h
@@ -9,7 +9,7 @@
 // Email:        Shane.Hill@dsto.defence.gov.au
 // Reason:       Remove dependancy on MFC. Code should compile on any
 //               platform. Tested on Windows/Linux/Irix
-//////////////////////////////////////////////////////////////////////
+////////////////////////////////////////////////////////////////////////////////
 
 /*
 !! MODIFIED BY FAKETRUTH and madmaxoft!!
diff --git a/src/Inventory.cpp b/src/Inventory.cpp
index 51ac32da9..fba6f4aea 100644
--- a/src/Inventory.cpp
+++ b/src/Inventory.cpp
@@ -507,7 +507,11 @@ bool cInventory::AddToBar( cItem & a_Item, const int a_Offset, const int a_Size,
 		int MaxStackSize = cItemHandler::GetItemHandler(a_Item.m_ItemType)->GetMaxStackSize();
 		for (int i = 0; i < a_Size; i++)
 		{
-			if (m_Slots[i + a_Offset].m_ItemType == a_Item.m_ItemType && m_Slots[i + a_Offset].m_ItemCount < MaxStackSize && m_Slots[i + a_Offset].m_ItemDamage == a_Item.m_ItemDamage)
+			if (
+				(m_Slots[i + a_Offset].m_ItemType == a_Item.m_ItemType) &&
+				(m_Slots[i + a_Offset].m_ItemCount < MaxStackSize) &&
+				(m_Slots[i + a_Offset].m_ItemDamage == a_Item.m_ItemDamage)
+			)
 			{
 				int NumFree = MaxStackSize - m_Slots[i + a_Offset].m_ItemCount;
 				if (NumFree >= a_Item.m_ItemCount)
@@ -533,7 +537,7 @@ bool cInventory::AddToBar( cItem & a_Item, const int a_Offset, const int a_Size,
 	if (a_Mode > 0)
 	{
 		// If we got more left, find first empty slot
-		for (int i = 0; i < a_Size && a_Item.m_ItemCount > 0; i++)
+		for (int i = 0; (i < a_Size) && (a_Item.m_ItemCount > 0); i++)
 		{
 			if (m_Slots[i + a_Offset].m_ItemType == -1)
 			{
diff --git a/src/ItemGrid.cpp b/src/ItemGrid.cpp
index 55fb36a17..d49ea9df1 100644
--- a/src/ItemGrid.cpp
+++ b/src/ItemGrid.cpp
@@ -6,7 +6,7 @@
 #include "Globals.h"
 #include "ItemGrid.h"
 #include "Items/ItemHandler.h"
-#include "Noise.h"
+#include "Noise/Noise.h"
 
 
 
diff --git a/src/LightingThread.cpp b/src/LightingThread.cpp
index ae5e746e7..ced95d4e1 100644
--- a/src/LightingThread.cpp
+++ b/src/LightingThread.cpp
@@ -226,6 +226,8 @@ void cLightingThread::Execute(void)
 		}  // CSLock(m_CS)
 		
 		LightChunk(*Item);
+		Item->Disable();
+		delete Item;
 	}
 }
 
@@ -236,6 +238,16 @@ void cLightingThread::Execute(void)
 
 void cLightingThread::LightChunk(cLightingChunkStay & a_Item)
 {
+	// If the chunk is already lit, skip it:
+	if (m_World->IsChunkLighted(a_Item.m_ChunkX, a_Item.m_ChunkZ))
+	{
+		if (a_Item.m_CallbackAfter != nullptr)
+		{
+			a_Item.m_CallbackAfter->Call(a_Item.m_ChunkX, a_Item.m_ChunkZ);
+		}
+		return;
+	}
+
 	cChunkDef::BlockNibbles BlockLight, SkyLight;
 	
 	ReadChunks(a_Item.m_ChunkX, a_Item.m_ChunkZ);
@@ -314,8 +326,6 @@ void cLightingThread::LightChunk(cLightingChunkStay & a_Item)
 	{
 		a_Item.m_CallbackAfter->Call(a_Item.m_ChunkX, a_Item.m_ChunkZ);
 	}
-	a_Item.Disable();
-	delete &a_Item;
 }
 
 
diff --git a/src/Logger.cpp b/src/Logger.cpp
index cb528e8ab..292622a46 100644
--- a/src/Logger.cpp
+++ b/src/Logger.cpp
@@ -45,12 +45,12 @@ void cLogger::LogSimple(AString a_Message, eLogLevel a_LogLevel)
 
 	AString Line;
 	#ifdef _DEBUG
-		Printf(Line, "[%04lx|%02d:%02d:%02d] %s\n", cIsThread::GetCurrentID(), timeinfo->tm_hour, timeinfo->tm_min, timeinfo->tm_sec, a_Message.c_str());
+		Printf(Line, "[%04llx|%02d:%02d:%02d] %s\n", static_cast<UInt64>(std::hash<std::thread::id>()(std::this_thread::get_id())), timeinfo->tm_hour, timeinfo->tm_min, timeinfo->tm_sec, a_Message.c_str());
 	#else
 		Printf(Line, "[%02d:%02d:%02d] %s\n", timeinfo->tm_hour, timeinfo->tm_min, timeinfo->tm_sec, a_Message.c_str());
 	#endif
 
-	
+
 	cCSLock Lock(m_CriticalSection);
 	for (size_t i = 0; i < m_LogListeners.size(); i++)
 	{
diff --git a/src/MersenneTwister.h b/src/MersenneTwister.h
deleted file mode 100644
index e83a470e2..000000000
--- a/src/MersenneTwister.h
+++ /dev/null
@@ -1,456 +0,0 @@
-// MersenneTwister.h
-// Mersenne Twister random number generator -- a C++ class MTRand
-// Based on code by Makoto Matsumoto, Takuji Nishimura, and Shawn Cokus
-// Richard J. Wagner  v1.1  28 September 2009  wagnerr@umich.edu
-
-// The Mersenne Twister is an algorithm for generating random numbers.  It
-// was designed with consideration of the flaws in various other generators.
-// The period, 2^19937-1, and the order of equidistribution, 623 dimensions,
-// are far greater.  The generator is also fast; it avoids multiplication and
-// division, and it benefits from caches and pipelines.  For more information
-// see the inventors' web page at
-// http://www.math.sci.hiroshima-u.ac.jp/~m-mat/MT/emt.html
-
-// Reference
-// M. Matsumoto and T. Nishimura, "Mersenne Twister: A 623-Dimensionally
-// Equidistributed Uniform Pseudo-Random Number Generator", ACM Transactions on
-// Modeling and Computer Simulation, Vol. 8, No. 1, January 1998, pp 3-30.
-
-// Copyright (C) 1997 - 2002, Makoto Matsumoto and Takuji Nishimura,
-// Copyright (C) 2000 - 2009, Richard J. Wagner
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions
-// are met:
-//
-//   1. Redistributions of source code must retain the above copyright
-//      notice, this list of conditions and the following disclaimer.
-//
-//   2. Redistributions in binary form must reproduce the above copyright
-//      notice, this list of conditions and the following disclaimer in the
-//      documentation and/or other materials provided with the distribution.
-//
-//   3. The names of its contributors may not be used to endorse or promote
-//      products derived from this software without specific prior written
-//      permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
-// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
-// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
-// ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
-// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
-// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
-// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
-// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
-// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
-// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
-// POSSIBILITY OF SUCH DAMAGE.
-
-#ifndef MERSENNETWISTER_H
-#define MERSENNETWISTER_H
-
-// Not thread safe (unless auto-initialization is avoided and each thread has
-// its own MTRand object)
-
-#include <iostream>
-#include <climits>
-#include <cstdio>
-#include <ctime>
-#include <cmath>
-
-class MTRand {
-// Data
-public:
-	typedef UInt32 uint32;  // unsigned integer type, at least 32 bits
-
-	enum { N = 624 };       // length of state vector
-	enum { SAVE = N + 1 };  // length of array for save()
-
-protected:
-	enum { M = 397 };  // period parameter
-
-	uint32 state[N];   // internal state
-	uint32 *pNext;     // next value to get from state
-	uint32 left;       // number of values left before reload needed
-
-// Methods
-public:
-	MTRand( const uint32 oneSeed );  // initialize with a simple uint32
-	MTRand( uint32 *const bigSeed, uint32 const seedLength = N );  // or array
-	MTRand();  // auto-initialize with /dev/urandom or time() and clock()
-	MTRand( const MTRand& o );  // copy
-
-	// Do NOT use for CRYPTOGRAPHY without securely hashing several returned
-	// values together, otherwise the generator state can be learned after
-	// reading 624 consecutive values.
-
-	// Access to 32-bit random numbers
-	uint32 randInt();                     // integer in [0,2^32-1]
-	uint32 randInt( const uint32 n );     // integer in [0,n] for n < 2^32
-	double rand();                        // real number in [0,1]
-	double rand( const double n );        // real number in [0,n]
-	double randExc();                     // real number in [0,1)
-	double randExc( const double n );     // real number in [0,n)
-	double randDblExc();                  // real number in (0,1)
-	double randDblExc( const double n );  // real number in (0,n)
-	double operator()();                  // same as rand()
-
-	// Access to 53-bit random numbers (capacity of IEEE double precision)
-	double rand53();  // real number in [0,1)
-
-	// Access to nonuniform random number distributions
-	double randNorm( const double mean = 0.0, const double stddev = 1.0 );
-
-	// Re-seeding functions with same behavior as initializers
-	void seed( const uint32 oneSeed );
-	void seed( uint32 *const bigSeed, const uint32 seedLength = N );
-	void seed();
-
-	// Saving and loading generator state
-	void save( uint32* saveArray ) const;  // to array of size SAVE
-	void load( uint32 *const loadArray );  // from such array
-	friend std::ostream& operator<<( std::ostream& os, const MTRand& mtrand );
-	friend std::istream& operator>>( std::istream& is, MTRand& mtrand );
-	MTRand& operator=( const MTRand& o );
-
-protected:
-	void initialize( const uint32 oneSeed );
-	void reload();
-	uint32 hiBit( const uint32 u ) const { return u & 0x80000000UL; }
-	uint32 loBit( const uint32 u ) const { return u & 0x00000001UL; }
-	uint32 loBits( const uint32 u ) const { return u & 0x7fffffffUL; }
-	uint32 mixBits( const uint32 u, const uint32 v ) const
-		{ return hiBit(u) | loBits(v); }
-	uint32 magic( const uint32 u ) const
-		{ return loBit(u) ? 0x9908b0dfUL : 0x0UL; }
-	uint32 twist( const uint32 m, const uint32 s0, const uint32 s1 ) const
-		{ return m ^ (mixBits(s0,s1)>>1) ^ magic(s1); }
-	static uint32 hash( time_t t, clock_t c );
-};
-
-// Functions are defined in order of usage to assist inlining
-
-inline MTRand::uint32 MTRand::hash( time_t t, clock_t c )
-{
-	// Get a uint32 from t and c
-	// Better than uint32(x) in case x is floating point in [0,1]
-	// Based on code by Lawrence Kirby (fred@genesis.demon.co.uk)
-
-	static uint32 differ = 0;  // guarantee time-based seeds will change
-
-	uint32 h1 = 0;
-	unsigned char *p = (unsigned char *) &t;
-	for( size_t i = 0; i < sizeof(t); ++i )
-	{
-		h1 *= UCHAR_MAX + 2U;
-		h1 += p[i];
-	}
-	uint32 h2 = 0;
-	p = (unsigned char *) &c;
-	for( size_t j = 0; j < sizeof(c); ++j )
-	{
-		h2 *= UCHAR_MAX + 2U;
-		h2 += p[j];
-	}
-	return ( h1 + differ++ ) ^ h2;
-}
-
-inline void MTRand::initialize( const uint32 seed )
-{
-	// Initialize generator state with seed
-	// See Knuth TAOCP Vol 2, 3rd Ed, p.106 for multiplier.
-	// In previous versions, most significant bits (MSBs) of the seed affect
-	// only MSBs of the state array.  Modified 9 Jan 2002 by Makoto Matsumoto.
-	uint32 *s = state;
-	uint32 *r = state;
-	uint32 i = 1;
-	*s++ = seed & 0xffffffffUL;
-	for( ; i < N; ++i )
-	{
-		*s++ = ( 1812433253UL * ( *r ^ (*r >> 30) ) + i ) & 0xffffffffUL;
-		r++;
-	}
-}
-
-inline void MTRand::reload()
-{
-	// Generate N new values in state
-	// Made clearer and faster by Matthew Bellew (matthew.bellew@home.com)
-	static const int MmN = int(M) - int(N);  // in case enums are unsigned
-	uint32 *p = state;
-	int i;
-	for( i = N - M; i--; ++p )
-		*p = twist( p[M], p[0], p[1] );
-	for( i = M; --i; ++p )
-		*p = twist( p[MmN], p[0], p[1] );
-	*p = twist( p[MmN], p[0], state[0] );
-
-	left = N, pNext = state;
-}
-
-inline void MTRand::seed( const uint32 oneSeed )
-{
-	// Seed the generator with a simple uint32
-	initialize(oneSeed);
-	reload();
-}
-
-inline void MTRand::seed( uint32 *const bigSeed, const uint32 seedLength )
-{
-	// Seed the generator with an array of uint32's
-	// There are 2^19937-1 possible initial states.  This function allows
-	// all of those to be accessed by providing at least 19937 bits (with a
-	// default seed length of N = 624 uint32's).  Any bits above the lower 32
-	// in each element are discarded.
-	// Just call seed() if you want to get array from /dev/urandom
-	initialize(19650218UL);
-	uint32 i = 1;
-	uint32 j = 0;
-	uint32 k = ( static_cast<uint32>(N) > seedLength ? static_cast<uint32>(N) : seedLength );
-	for( ; k; --k )
-	{
-		state[i] =
-		state[i] ^ ( (state[i-1] ^ (state[i-1] >> 30)) * 1664525UL );
-		state[i] += ( bigSeed[j] & 0xffffffffUL ) + j;
-		state[i] &= 0xffffffffUL;
-		++i;  ++j;
-		if( i >= N ) { state[0] = state[N-1];  i = 1; }
-		if( j >= seedLength ) j = 0;
-	}
-	for( k = N - 1; k; --k )
-	{
-		state[i] =
-		state[i] ^ ( (state[i-1] ^ (state[i-1] >> 30)) * 1566083941UL );
-		state[i] -= i;
-		state[i] &= 0xffffffffUL;
-		++i;
-		if( i >= N ) { state[0] = state[N-1];  i = 1; }
-	}
-	state[0] = 0x80000000UL;  // MSB is 1, assuring non-zero initial array
-	reload();
-}
-
-inline void MTRand::seed()
-{
-	// Seed the generator with an array from /dev/urandom if available
-	// Otherwise use a hash of time() and clock() values
-
-	// First try getting an array from /dev/urandom
-
-	/* // Commented out by FakeTruth because doing this 200 times a tick is SUUUUPEERRR SLOW!!~~!\D5Ne
-	FILE* urandom = fopen( "/dev/urandom", "rb" );
-	if( urandom )
-	{
-		uint32 bigSeed[N];
-		register uint32 *s = bigSeed;
-		register int i = N;
-		register bool success = true;
-		while( success && i-- )
-			success = fread( s++, sizeof(uint32), 1, urandom );
-		fclose(urandom);
-		if( success ) { seed( bigSeed, N );  return; }
-	}
-	*/
-
-	// Was not successful, so use time() and clock() instead
-	seed( hash( time(NULL), clock() ) );
-}
-
-inline MTRand::MTRand( const uint32 oneSeed )
-	{ seed(oneSeed); }
-
-inline MTRand::MTRand( uint32 *const bigSeed, const uint32 seedLength )
-	{ seed(bigSeed,seedLength); }
-
-inline MTRand::MTRand()
-	{ seed(); }
-
-inline MTRand::MTRand( const MTRand& o )
-{
-	const uint32 *t = o.state;
-	uint32 *s = state;
-	int i = N;
-	for( ; i--; *s++ = *t++ ) {}
-	left = o.left;
-	pNext = &state[N-left];
-}
-
-inline MTRand::uint32 MTRand::randInt()
-{
-	// Pull a 32-bit integer from the generator state
-	// Every other access function simply transforms the numbers extracted here
-
-	if( left == 0 ) reload();
-	--left;
-
-	uint32 s1;
-	s1 = *pNext++;
-	s1 ^= (s1 >> 11);
-	s1 ^= (s1 <<  7) & 0x9d2c5680UL;
-	s1 ^= (s1 << 15) & 0xefc60000UL;
-	return ( s1 ^ (s1 >> 18) );
-}
-
-inline MTRand::uint32 MTRand::randInt( const uint32 n )
-{
-	// Find which bits are used in n
-	// Optimized by Magnus Jonsson (magnus@smartelectronix.com)
-	uint32 used = n;
-	used |= used >> 1;
-	used |= used >> 2;
-	used |= used >> 4;
-	used |= used >> 8;
-	used |= used >> 16;
-
-	// Draw numbers until one is found in [0,n]
-	uint32 i;
-	do
-		i = randInt() & used;  // toss unused bits to shorten search
-	while( i > n );
-	return i;
-}
-
-inline double MTRand::rand()
-	{ return double(randInt()) * (1.0/4294967295.0); }
-
-inline double MTRand::rand( const double n )
-	{ return rand() * n; }
-
-inline double MTRand::randExc()
-	{ return double(randInt()) * (1.0/4294967296.0); }
-
-inline double MTRand::randExc( const double n )
-	{ return randExc() * n; }
-
-inline double MTRand::randDblExc()
-	{ return ( double(randInt()) + 0.5 ) * (1.0/4294967296.0); }
-
-inline double MTRand::randDblExc( const double n )
-	{ return randDblExc() * n; }
-
-inline double MTRand::rand53()
-{
-	uint32 a = randInt() >> 5, b = randInt() >> 6;
-	return ( a * 67108864.0 + b ) * (1.0/9007199254740992.0);  // by Isaku Wada
-}
-
-inline double MTRand::randNorm( const double mean, const double stddev )
-{
-	// Return a real number from a normal (Gaussian) distribution with given
-	// mean and standard deviation by polar form of Box-Muller transformation
-	double x, y, r;
-	do
-	{
-		x = 2.0 * rand() - 1.0;
-		y = 2.0 * rand() - 1.0;
-		r = x * x + y * y;
-	}
-	while ( r >= 1.0 || r == 0.0 );
-	double s = sqrt( -2.0 * log(r) / r );
-	return mean + x * s * stddev;
-}
-
-inline double MTRand::operator()()
-{
-	return rand();
-}
-
-inline void MTRand::save( uint32* saveArray ) const
-{
-	const uint32 *s = state;
-	uint32 *sa = saveArray;
-	int i = N;
-	for( ; i--; *sa++ = *s++ ) {}
-	*sa = left;
-}
-
-inline void MTRand::load( uint32 *const loadArray )
-{
-	uint32 *s = state;
-	uint32 *la = loadArray;
-	int i = N;
-	for( ; i--; *s++ = *la++ ) {}
-	left = *la;
-	pNext = &state[N-left];
-}
-
-inline std::ostream& operator<<( std::ostream& os, const MTRand& mtrand )
-{
-	const MTRand::uint32 *s = mtrand.state;
-	int i = mtrand.N;
-	for( ; i--; os << *s++ << "\t" ) {}
-	return os << mtrand.left;
-}
-
-inline std::istream& operator>>( std::istream& is, MTRand& mtrand )
-{
-	MTRand::uint32 *s = mtrand.state;
-	int i = mtrand.N;
-	for( ; i--; is >> *s++ ) {}
-	is >> mtrand.left;
-	mtrand.pNext = &mtrand.state[mtrand.N-mtrand.left];
-	return is;
-}
-
-inline MTRand& MTRand::operator=( const MTRand& o )
-{
-	if( this == &o ) return (*this);
-	const uint32 *t = o.state;
-	uint32 *s = state;
-	int i = N;
-	for( ; i--; *s++ = *t++ ) {}
-	left = o.left;
-	pNext = &state[N-left];
-	return (*this);
-}
-
-#endif  // MERSENNETWISTER_H
-
-// Change log:
-//
-// v0.1 - First release on 15 May 2000
-//      - Based on code by Makoto Matsumoto, Takuji Nishimura, and Shawn Cokus
-//      - Translated from C to C++
-//      - Made completely ANSI compliant
-//      - Designed convenient interface for initialization, seeding, and
-//        obtaining numbers in default or user-defined ranges
-//      - Added automatic seeding from /dev/urandom or time() and clock()
-//      - Provided functions for saving and loading generator state
-//
-// v0.2 - Fixed bug which reloaded generator one step too late
-//
-// v0.3 - Switched to clearer, faster reload() code from Matthew Bellew
-//
-// v0.4 - Removed trailing newline in saved generator format to be consistent
-//        with output format of built-in types
-//
-// v0.5 - Improved portability by replacing static const int's with enum's and
-//        clarifying return values in seed(); suggested by Eric Heimburg
-//      - Removed MAXINT constant; use 0xffffffffUL instead
-//
-// v0.6 - Eliminated seed overflow when uint32 is larger than 32 bits
-//      - Changed integer [0,n] generator to give better uniformity
-//
-// v0.7 - Fixed operator precedence ambiguity in reload()
-//      - Added access for real numbers in (0,1) and (0,n)
-//
-// v0.8 - Included time.h header to properly support time_t and clock_t
-//
-// v1.0 - Revised seeding to match 26 Jan 2002 update of Nishimura and Matsumoto
-//      - Allowed for seeding with arrays of any length
-//      - Added access for real numbers in [0,1) with 53-bit resolution
-//      - Added access for real numbers from normal (Gaussian) distributions
-//      - Increased overall speed by optimizing twist()
-//      - Doubled speed of integer [0,n] generation
-//      - Fixed out-of-range number generation on 64-bit machines
-//      - Improved portability by substituting literal constants for long enum's
-//      - Changed license from GNU LGPL to BSD
-//
-// v1.1 - Corrected parameter label in randNorm from "variance" to "stddev"
-//      - Changed randNorm algorithm from basic to polar form for efficiency
-//      - Updated includes from deprecated <xxxx.h> to standard <cxxxx> forms
-//      - Cleaned declarations and definitions to please Intel compiler
-//      - Revised twist() operator to work on ones'-complement machines
-//      - Fixed reload() function to work when N and M are unsigned
-//      - Added copy constructor and copy operator from Salvador Espana
diff --git a/src/MobSpawner.cpp b/src/MobSpawner.cpp
index e461fae4c..ee9e569a7 100644
--- a/src/MobSpawner.cpp
+++ b/src/MobSpawner.cpp
@@ -61,7 +61,7 @@ eMonsterType cMobSpawner::ChooseMobType(EMCSBiome a_Biome)
 {
 	std::set<eMonsterType> allowedMobs;
 
-	if (a_Biome == biMushroomIsland || a_Biome == biMushroomShore)
+	if ((a_Biome == biMushroomIsland) || (a_Biome == biMushroomShore))
 	{
 		addIfAllowed(mtMooshroom, allowedMobs);
 	}
@@ -84,7 +84,7 @@ eMonsterType cMobSpawner::ChooseMobType(EMCSBiome a_Biome)
 		addIfAllowed(mtCreeper, allowedMobs);
 		addIfAllowed(mtSquid, allowedMobs);
 		
-		if (a_Biome != biDesert && a_Biome != biBeach && a_Biome != biOcean)
+		if ((a_Biome != biDesert) && (a_Biome != biBeach) && (a_Biome != biOcean))
 		{
 			addIfAllowed(mtSheep, allowedMobs);
 			addIfAllowed(mtPig, allowedMobs);
@@ -93,11 +93,11 @@ eMonsterType cMobSpawner::ChooseMobType(EMCSBiome a_Biome)
 			addIfAllowed(mtEnderman, allowedMobs);
 			addIfAllowed(mtSlime, allowedMobs);  // MG TODO : much more complicated rule
 			
-			if (a_Biome == biForest || a_Biome == biForestHills || a_Biome == biTaiga  || a_Biome == biTaigaHills)
+			if ((a_Biome == biForest) || (a_Biome == biForestHills) || (a_Biome == biTaiga) || (a_Biome == biTaigaHills))
 			{
 				addIfAllowed(mtWolf, allowedMobs);
 			}
-			else if (a_Biome == biJungle || a_Biome == biJungleHills)
+			else if ((a_Biome == biJungle) || (a_Biome == biJungleHills))
 			{
 				addIfAllowed(mtOcelot, allowedMobs);
 			}
@@ -126,8 +126,9 @@ eMonsterType cMobSpawner::ChooseMobType(EMCSBiome a_Biome)
 
 bool cMobSpawner::CanSpawnHere(cChunk * a_Chunk, int a_RelX, int a_RelY, int a_RelZ, eMonsterType a_MobType, EMCSBiome a_Biome)
 {
+	cFastRandom Random;
 	BLOCKTYPE TargetBlock = E_BLOCK_AIR;
-	if (m_AllowedTypes.find(a_MobType) != m_AllowedTypes.end() && a_Chunk->UnboundedRelGetBlockType(a_RelX, a_RelY, a_RelZ, TargetBlock))
+	if (a_Chunk->UnboundedRelGetBlockType(a_RelX, a_RelY, a_RelZ, TargetBlock))
 	{
 		if ((a_RelY + 1 > cChunkDef::Height) || (a_RelY - 1 < 0))
 		{
@@ -177,7 +178,7 @@ bool cMobSpawner::CanSpawnHere(cChunk * a_Chunk, int a_RelX, int a_RelY, int a_R
 						(BlockBelow == E_BLOCK_GRASS) || (BlockBelow == E_BLOCK_LEAVES) || (BlockBelow == E_BLOCK_NEW_LEAVES)
 					) &&
 					(a_RelY >= 62) &&
-					(m_Random.NextInt(3, a_Biome) != 0)
+					(Random.NextInt(3, a_Biome) != 0)
 				);
 			}
 			
@@ -238,7 +239,7 @@ bool cMobSpawner::CanSpawnHere(cChunk * a_Chunk, int a_RelX, int a_RelY, int a_R
 					(!cBlockInfo::IsTransparent(BlockBelow)) &&
 					(SkyLight <= 7) &&
 					(BlockLight <= 7) &&
-					(m_Random.NextInt(2, a_Biome) == 0)
+					(Random.NextInt(2, a_Biome) == 0)
 				);
 			}
 
@@ -262,7 +263,7 @@ bool cMobSpawner::CanSpawnHere(cChunk * a_Chunk, int a_RelX, int a_RelY, int a_R
 					(TargetBlock == E_BLOCK_AIR) &&
 					(BlockAbove == E_BLOCK_AIR) &&
 					(!cBlockInfo::IsTransparent(BlockBelow)) &&
-					(m_Random.NextInt(20, a_Biome) == 0)
+					(Random.NextInt(20, a_Biome) == 0)
 				);
 			}
 			
@@ -284,6 +285,19 @@ bool cMobSpawner::CanSpawnHere(cChunk * a_Chunk, int a_RelX, int a_RelY, int a_R
 					)
 				);
 			}
+
+			case mtMooshroom:
+			{
+				return (
+					(TargetBlock == E_BLOCK_AIR) &&
+					(BlockAbove == E_BLOCK_AIR) &&
+					(BlockBelow == E_BLOCK_MYCELIUM) &&
+					(
+						(a_Biome == biMushroomShore) ||
+						(a_Biome == biMushroomIsland)
+					)
+				);
+			}
 			
 			default:
 			{
@@ -322,8 +336,8 @@ cMonster* cMobSpawner::TryToSpawnHere(cChunk * a_Chunk, int a_RelX, int a_RelY,
 
 	// Make sure we are looking at the right chunk to spawn in
 	a_Chunk = a_Chunk->GetRelNeighborChunkAdjustCoords(a_RelX, a_RelZ);
-	
-	if (CanSpawnHere(a_Chunk, a_RelX, a_RelY, a_RelZ, m_MobType, a_Biome))
+
+	if ((m_AllowedTypes.find(m_MobType) != m_AllowedTypes.end()) && CanSpawnHere(a_Chunk, a_RelX, a_RelY, a_RelZ, m_MobType, a_Biome))
 	{
 		cMonster * newMob = cMonster::NewMonsterFromType(m_MobType);
 		if (newMob)
diff --git a/src/MobSpawner.h b/src/MobSpawner.h
index 6b3a913ec..e8b8f191b 100644
--- a/src/MobSpawner.h
+++ b/src/MobSpawner.h
@@ -51,10 +51,10 @@ public :
 	typedef const std::set<cMonster *> tSpawnedContainer;
 	tSpawnedContainer & getSpawned(void);
 
-protected :
-	// return true if specified type of mob can spawn on specified block
-	bool CanSpawnHere(cChunk * a_Chunk, int a_RelX, int a_RelY, int a_RelZ, eMonsterType a_MobType, EMCSBiome a_Biome);
+	/** Returns true if specified type of mob can spawn on specified block */
+	static bool CanSpawnHere(cChunk * a_Chunk, int a_RelX, int a_RelY, int a_RelZ, eMonsterType a_MobType, EMCSBiome a_Biome);
 
+protected :
 	// return a random type that can spawn on specified biome.
 	// returns E_ENTITY_TYPE_DONOTUSE if none is possible
 	eMonsterType ChooseMobType(EMCSBiome a_Biome);
@@ -62,7 +62,6 @@ protected :
 	// add toAdd inside toAddIn, if toAdd is in m_AllowedTypes
 	void addIfAllowed(eMonsterType toAdd, std::set<eMonsterType> & toAddIn);
 
-protected :
 	cMonster::eFamily m_MonsterFamily;
 	std::set<eMonsterType> m_AllowedTypes;
 	bool m_NewPack;
diff --git a/src/Mobs/AggressiveMonster.cpp b/src/Mobs/AggressiveMonster.cpp
index 41ef26e2a..7ca7a9d66 100644
--- a/src/Mobs/AggressiveMonster.cpp
+++ b/src/Mobs/AggressiveMonster.cpp
@@ -75,7 +75,9 @@ void cAggressiveMonster::Tick(float a_Dt, cChunk & a_Chunk)
 	}
 
 	if (m_Target == nullptr)
+	{
 		return;
+	}
 
 	cTracer LineOfSight(GetWorld());
 	Vector3d AttackDirection(m_Target->GetPosition() - GetPosition());
diff --git a/src/Mobs/Blaze.cpp b/src/Mobs/Blaze.cpp
index 16869c79d..1fa9d2c37 100644
--- a/src/Mobs/Blaze.cpp
+++ b/src/Mobs/Blaze.cpp
@@ -34,7 +34,7 @@ void cBlaze::Attack(float a_Dt)
 {
 	m_AttackInterval += a_Dt * m_AttackRate;
 
-	if (m_Target != nullptr && m_AttackInterval > 3.0)
+	if ((m_Target != nullptr) && (m_AttackInterval > 3.0))
 	{
 		// Setting this higher gives us more wiggle room for attackrate
 		Vector3d Speed = GetLookVector() * 20;
diff --git a/src/Mobs/Ghast.cpp b/src/Mobs/Ghast.cpp
index c65c0d29a..fc8de8362 100644
--- a/src/Mobs/Ghast.cpp
+++ b/src/Mobs/Ghast.cpp
@@ -36,7 +36,7 @@ void cGhast::Attack(float a_Dt)
 {
 	m_AttackInterval += a_Dt * m_AttackRate;
 	
-	if (m_Target != nullptr && m_AttackInterval > 3.0)
+	if ((m_Target != nullptr) && (m_AttackInterval > 3.0))
 	{
 		// Setting this higher gives us more wiggle room for attackrate
 		Vector3d Speed = GetLookVector() * 20;
diff --git a/src/Mobs/Monster.cpp b/src/Mobs/Monster.cpp
index 23b4d9f45..7b8f763af 100644
--- a/src/Mobs/Monster.cpp
+++ b/src/Mobs/Monster.cpp
@@ -9,7 +9,6 @@
 #include "../Entities/Player.h"
 #include "../Entities/ExpOrb.h"
 #include "../MonsterConfig.h"
-#include "../MersenneTwister.h"
 
 #include "../Chunk.h"
 #include "../FastRandom.h"
@@ -21,57 +20,49 @@
 /** Map for eType <-> string
 Needs to be alpha-sorted by the strings, because binary search is used in StringToMobType()
 The strings need to be lowercase (for more efficient comparisons in StringToMobType())
+m_VanillaName is the name that vanilla use for this mob.
 */
 static const struct
 {
 	eMonsterType m_Type;
 	const char * m_lcName;
+	const char * m_VanillaName;
 } g_MobTypeNames[] =
 {
-	{mtBat,          "bat"},
-	{mtBlaze,        "blaze"},
-	{mtCaveSpider,   "cavespider"},
-	{mtChicken,      "chicken"},
-	{mtCow,          "cow"},
-	{mtCreeper,      "creeper"},
-	{mtEnderman,     "enderman"},
-	{mtEnderDragon,  "enderdragon"},
-	{mtGhast,        "ghast"},
-	{mtHorse,        "horse"},
-	{mtIronGolem,    "irongolem"},
-	{mtMagmaCube,    "magmacube"},
-	{mtMooshroom,    "mooshroom"},
-	{mtOcelot,       "ocelot"},
-	{mtPig,          "pig"},
-	{mtSheep,        "sheep"},
-	{mtSilverfish,   "silverfish"},
-	{mtSkeleton,     "skeleton"},
-	{mtSlime,        "slime"},
-	{mtSnowGolem,    "snowgolem"},
-	{mtSpider,       "spider"},
-	{mtSquid,        "squid"},
-	{mtVillager,     "villager"},
-	{mtWitch,        "witch"},
-	{mtWither,       "wither"},
-	{mtWolf,         "wolf"},
-	{mtZombie,       "zombie"},
-	{mtZombiePigman, "zombiepigman"},
+	{mtBat,          "bat",          "Bat"},
+	{mtBlaze,        "blaze",        "Blaze"},
+	{mtCaveSpider,   "cavespider",   "CaveSpider"},
+	{mtChicken,      "chicken",      "Chicken"},
+	{mtCow,          "cow",          "Cow"},
+	{mtCreeper,      "creeper",      "Creeper"},
+	{mtEnderman,     "enderman",     "Enderman"},
+	{mtEnderDragon,  "enderdragon",  "EnderDragon"},
+	{mtGhast,        "ghast",        "Ghast"},
+	{mtHorse,        "horse",        "EntityHorse"},
+	{mtIronGolem,    "irongolem",    "VillagerGolem"},
+	{mtMagmaCube,    "magmacube",    "LavaSlime"},
+	{mtMooshroom,    "mooshroom",    "MushroomCow"},
+	{mtOcelot,       "ocelot",       "Ozelot"},
+	{mtPig,          "pig",          "Pig"},
+	{mtSheep,        "sheep",        "Sheep"},
+	{mtSilverfish,   "silverfish",   "Silverfish"},
+	{mtSkeleton,     "skeleton",     "Skeleton"},
+	{mtSlime,        "slime",        "Slime"},
+	{mtSnowGolem,    "snowgolem",    "SnowMan"},
+	{mtSpider,       "spider",       "Spider"},
+	{mtSquid,        "squid",        "Squid"},
+	{mtVillager,     "villager",     "Villager"},
+	{mtWitch,        "witch",        "Witch"},
+	{mtWither,       "wither",       "WitherBoss"},
+	{mtWolf,         "wolf",         "Wolf"},
+	{mtZombie,       "zombie",       "Zombie"},
+	{mtZombiePigman, "zombiepigman", "PigZombie"},
 } ;
 
 
 
 
 
-eMonsterType StringToMobType(const AString & a_MobString)
-{
-	LOGWARNING("%s: Function is obsolete, use cMonster::StringToMobType() instead", __FUNCTION__);
-	return cMonster::StringToMobType(a_MobString);
-}
-
-
-
-
-
 ////////////////////////////////////////////////////////////////////////////////
 // cMonster:
 
@@ -160,7 +151,7 @@ void cMonster::TickPathFinding()
 		BLOCKTYPE BlockAtYP = m_World->GetBlock(gCrossCoords[i].x + PosX, PosY + 1, gCrossCoords[i].z + PosZ);
 		BLOCKTYPE BlockAtYPP = m_World->GetBlock(gCrossCoords[i].x + PosX, PosY + 2, gCrossCoords[i].z + PosZ);
 		int LowestY = FindFirstNonAirBlockPosition(gCrossCoords[i].x + PosX, gCrossCoords[i].z + PosZ);
-		BLOCKTYPE BlockAtLowestY = m_World->GetBlock(gCrossCoords[i].x + PosX, LowestY, gCrossCoords[i].z + PosZ);
+		BLOCKTYPE BlockAtLowestY = (LowestY >= cChunkDef::Height) ? E_BLOCK_AIR : m_World->GetBlock(gCrossCoords[i].x + PosX, LowestY, gCrossCoords[i].z + PosZ);
 
 		if (
 			(!cBlockInfo::IsSolid(BlockAtY)) &&
@@ -275,7 +266,9 @@ void cMonster::Tick(float a_Dt, cChunk & a_Chunk)
 	}
 
 	if ((m_Target != nullptr) && m_Target->IsDestroyed())
+	{
 		m_Target = nullptr;
+	}
 
 	// Burning in daylight
 	HandleDaylightBurning(a_Chunk);
@@ -453,7 +446,7 @@ int cMonster::FindFirstNonAirBlockPosition(double a_PosX, double a_PosZ)
 	}
 	else
 	{
-		while (cBlockInfo::IsSolid(m_World->GetBlock((int)floor(a_PosX), PosY, (int)floor(a_PosZ))) && (PosY < cChunkDef::Height))
+		while ((PosY < cChunkDef::Height) && cBlockInfo::IsSolid(m_World->GetBlock((int)floor(a_PosX), PosY, (int)floor(a_PosZ))))
 		{
 			PosY++;
 		}
@@ -784,39 +777,47 @@ AString cMonster::MobTypeToString(eMonsterType a_MobType)
 
 
 
-eMonsterType cMonster::StringToMobType(const AString & a_Name)
+AString cMonster::MobTypeToVanillaName(eMonsterType a_MobType)
 {
-	AString lcName = StrToLower(a_Name);
-	
-	// Binary-search for the lowercase name:
-	int lo = 0, hi = ARRAYCOUNT(g_MobTypeNames) - 1;
-	while (hi - lo > 1)
+	// Mob types aren't sorted, so we need to search linearly:
+	for (size_t i = 0; i < ARRAYCOUNT(g_MobTypeNames); i++)
 	{
-		int mid = (lo + hi) / 2;
-		int res = strcmp(g_MobTypeNames[mid].m_lcName, lcName.c_str());
-		if (res == 0)
-		{
-			return g_MobTypeNames[mid].m_Type;
-		}
-		if (res < 0)
-		{
-			lo = mid;
-		}
-		else
+		if (g_MobTypeNames[i].m_Type == a_MobType)
 		{
-			hi = mid;
+			return g_MobTypeNames[i].m_VanillaName;
 		}
 	}
-	// Range has collapsed to at most two elements, compare each:
-	if (strcmp(g_MobTypeNames[lo].m_lcName, lcName.c_str()) == 0)
+
+	// Not found:
+	return "";
+}
+
+
+
+
+
+eMonsterType cMonster::StringToMobType(const AString & a_Name)
+{
+	AString lcName = StrToLower(a_Name);
+
+	// Search MCServer name:
+	for (size_t i = 0; i < ARRAYCOUNT(g_MobTypeNames); i++)
 	{
-		return g_MobTypeNames[lo].m_Type;
+		if (strcmp(g_MobTypeNames[i].m_lcName, lcName.c_str()) == 0)
+		{
+			return g_MobTypeNames[i].m_Type;
+		}
 	}
-	if ((lo != hi) && (strcmp(g_MobTypeNames[hi].m_lcName, lcName.c_str()) == 0))
+
+	// Not found. Search Vanilla name:
+	for (size_t i = 0; i < ARRAYCOUNT(g_MobTypeNames); i++)
 	{
-		return g_MobTypeNames[hi].m_Type;
+		if (strcmp(StrToLower(g_MobTypeNames[i].m_VanillaName).c_str(), lcName.c_str()) == 0)
+		{
+			return g_MobTypeNames[i].m_Type;
+		}
 	}
-	
+
 	// Not found:
 	return mtInvalidType;
 }
@@ -1028,22 +1029,34 @@ void cMonster::AddRandomArmorDropItem(cItems & a_Drops, short a_LootingLevel)
 	MTRand r1;
 	if (r1.randInt() % 200 < ((m_DropChanceHelmet * 200) + (a_LootingLevel * 2)))
 	{
-		if (!GetEquippedHelmet().IsEmpty()) a_Drops.push_back(GetEquippedHelmet());
+		if (!GetEquippedHelmet().IsEmpty())
+		{
+			a_Drops.push_back(GetEquippedHelmet());
+		}
 	}
 	
 	if (r1.randInt() % 200 < ((m_DropChanceChestplate * 200) + (a_LootingLevel * 2)))
 	{
-		if (!GetEquippedChestplate().IsEmpty()) a_Drops.push_back(GetEquippedChestplate());
+		if (!GetEquippedChestplate().IsEmpty())
+		{
+			a_Drops.push_back(GetEquippedChestplate());
+		}
 	}
 	
 	if (r1.randInt() % 200 < ((m_DropChanceLeggings * 200) + (a_LootingLevel * 2)))
 	{
-		if (!GetEquippedLeggings().IsEmpty()) a_Drops.push_back(GetEquippedLeggings());
+		if (!GetEquippedLeggings().IsEmpty())
+		{
+			a_Drops.push_back(GetEquippedLeggings());
+		}
 	}
 	
 	if (r1.randInt() % 200 < ((m_DropChanceBoots * 200) + (a_LootingLevel * 2)))
 	{
-		if (!GetEquippedBoots().IsEmpty()) a_Drops.push_back(GetEquippedBoots());
+		if (!GetEquippedBoots().IsEmpty())
+		{
+			a_Drops.push_back(GetEquippedBoots());
+		}
 	}
 }
 
@@ -1056,7 +1069,10 @@ void cMonster::AddRandomWeaponDropItem(cItems & a_Drops, short a_LootingLevel)
 	MTRand r1;
 	if (r1.randInt() % 200 < ((m_DropChanceWeapon * 200) + (a_LootingLevel * 2)))
 	{
-		if (!GetEquippedWeapon().IsEmpty()) a_Drops.push_back(GetEquippedWeapon());
+		if (!GetEquippedWeapon().IsEmpty())
+		{
+			a_Drops.push_back(GetEquippedWeapon());
+		}
 	}
 }
 
diff --git a/src/Mobs/Monster.h b/src/Mobs/Monster.h
index f5ae2cb4d..f04e45ac6 100644
--- a/src/Mobs/Monster.h
+++ b/src/Mobs/Monster.h
@@ -64,7 +64,7 @@ public:
 	virtual bool ReachedDestination(void);
 
 	// tolua_begin
-	eMonsterType GetMobType(void) const {return m_MobType; }
+	eMonsterType GetMobType(void) const { return m_MobType; }
 	eFamily GetMobFamily(void) const;
 	// tolua_end
 
@@ -133,16 +133,19 @@ public:
 	If it's false, you only see the name when you sight the mob. If it's true, you always see the custom name. */
 	void SetCustomNameAlwaysVisible(bool a_CustomNameAlwaysVisible);
 
-	/// Translates MobType enum to a string, empty string if unknown
+	/** Translates MobType enum to a string, empty string if unknown */
 	static AString MobTypeToString(eMonsterType a_MobType);
 
-	/// Translates MobType string to the enum, mtInvalidType if not recognized
+	/** Translates MobType enum to the vanilla name of the mob, empty string if unknown. */
+	static AString MobTypeToVanillaName(eMonsterType a_MobType);
+
+	/** Translates MobType string to the enum, mtInvalidType if not recognized */
 	static eMonsterType StringToMobType(const AString & a_MobTypeName);
 
-	/// Returns the mob family based on the type
+	/** Returns the mob family based on the type */
 	static eFamily FamilyFromType(eMonsterType a_MobType);
 
-	/// Returns the spawn delay (number of game ticks between spawn attempts) for the given mob family
+	/** Returns the spawn delay (number of game ticks between spawn attempts) for the given mob family */
 	static int GetSpawnDelay(cMonster::eFamily a_MobFamily);
 
 	// tolua_end
@@ -169,10 +172,12 @@ protected:
 	/** Stores if mobile is currently moving towards the ultimate, final destination */
 	bool m_bMovingToDestination;
 
-	/** Finds the first non-air block position (not the highest, as cWorld::GetHeight does)
-		If current Y is nonsolid, goes down to try to find a solid block, then returns that + 1
-		If current Y is solid, goes up to find first nonsolid block, and returns that */
+	/** Finds the lowest non-air block position (not the highest, as cWorld::GetHeight does)
+	If current Y is nonsolid, goes down to try to find a solid block, then returns that + 1
+	If current Y is solid, goes up to find first nonsolid block, and returns that.
+	If no suitable position is found, returns cChunkDef::Height. */
 	int FindFirstNonAirBlockPosition(double a_PosX, double a_PosZ);
+
 	/** Returns if a monster can actually reach a given height by jumping or walking */
 	inline bool IsNextYPosReachable(int a_PosY)
 	{
diff --git a/src/Mobs/MonsterTypes.h b/src/Mobs/MonsterTypes.h
index 852eb3446..dc6dd3992 100644
--- a/src/Mobs/MonsterTypes.h
+++ b/src/Mobs/MonsterTypes.h
@@ -2,6 +2,7 @@
 #pragma once
 
 /// This identifies individual monster type, as well as their network type-ID
+
 // tolua_begin
 enum eMonsterType
 {
@@ -38,15 +39,6 @@ enum eMonsterType
 	mtZombiePigman = E_META_SPAWN_EGG_ZOMBIE_PIGMAN,
 } ;
 
-
-
-
-
-/** Translates a mob string ("ocelot") to mobtype (mtOcelot).
-OBSOLETE, use cMonster::StringToMobType() instead.
-Implemented in Monster.cpp. */
-extern eMonsterType StringToMobType(const AString & a_MobString);
-
 // tolua_end
 
 
diff --git a/src/Mobs/Pig.cpp b/src/Mobs/Pig.cpp
index 55a4412ca..1e4c35acd 100644
--- a/src/Mobs/Pig.cpp
+++ b/src/Mobs/Pig.cpp
@@ -49,17 +49,17 @@ void cPig::OnRightClicked(cPlayer & a_Player)
 				a_Player.Detach();
 				return;
 			}
-		
+
 			if (m_Attachee->IsPlayer())
 			{
 				// Another player is already sitting in here, cannot attach
 				return;
 			}
-		
+
 			// Detach whatever is sitting in this pig now:
 			m_Attachee->Detach();
 		}
-	
+
 		// Attach the player to this pig
 		a_Player.AttachTo(this);
 	}
@@ -98,3 +98,23 @@ void cPig::Tick(float a_Dt, cChunk & a_Chunk)
 
 
 
+
+bool cPig::DoTakeDamage(TakeDamageInfo & a_TDI)
+{
+	if (!super::DoTakeDamage(a_TDI))
+	{
+		return false;
+	}
+
+	if (a_TDI.DamageType == dtLightning)
+	{
+		Destroy();
+		m_World->SpawnMob(GetPosX(), GetPosY(), GetPosZ(), mtZombiePigman);
+		return true;
+	}
+	return true;
+}
+
+
+
+
diff --git a/src/Mobs/Pig.h b/src/Mobs/Pig.h
index 953850b3a..0e026933a 100644
--- a/src/Mobs/Pig.h
+++ b/src/Mobs/Pig.h
@@ -17,6 +17,9 @@ public:
 
 	CLASS_PROTODEF(cPig)
 
+	// cEntity overrides
+	virtual bool DoTakeDamage(TakeDamageInfo & a_TDI) override;
+	
 	virtual void GetDrops(cItems & a_Drops, cEntity * a_Killer = nullptr) override;
 	virtual void OnRightClicked(cPlayer & a_Player) override;
 	virtual void Tick(float a_Dt, cChunk & a_Chunk) override;
diff --git a/src/Mobs/Skeleton.cpp b/src/Mobs/Skeleton.cpp
index f17bc307c..da5ddc670 100644
--- a/src/Mobs/Skeleton.cpp
+++ b/src/Mobs/Skeleton.cpp
@@ -71,7 +71,7 @@ void cSkeleton::Attack(float a_Dt)
 {
 	m_AttackInterval += a_Dt * m_AttackRate;
 
-	if (m_Target != nullptr && m_AttackInterval > 3.0)
+	if ((m_Target != nullptr) && (m_AttackInterval > 3.0))
 	{
 		// Setting this higher gives us more wiggle room for attackrate
 		Vector3d Speed = GetLookVector() * 20;
diff --git a/src/Mobs/SnowGolem.cpp b/src/Mobs/SnowGolem.cpp
index 76334d970..8c4178beb 100644
--- a/src/Mobs/SnowGolem.cpp
+++ b/src/Mobs/SnowGolem.cpp
@@ -38,7 +38,7 @@ void cSnowGolem::Tick(float a_Dt, cChunk & a_Chunk)
 	{
 		BLOCKTYPE BlockBelow = m_World->GetBlock((int) floor(GetPosX()), (int) floor(GetPosY()) - 1, (int) floor(GetPosZ()));
 		BLOCKTYPE Block = m_World->GetBlock((int) floor(GetPosX()), (int) floor(GetPosY()), (int) floor(GetPosZ()));
-		if (Block == E_BLOCK_AIR && cBlockInfo::IsSolid(BlockBelow))
+		if ((Block == E_BLOCK_AIR) && cBlockInfo::IsSolid(BlockBelow))
 		{
 			m_World->SetBlock((int) floor(GetPosX()), (int) floor(GetPosY()), (int) floor(GetPosZ()), E_BLOCK_SNOW, 0);
 		}
diff --git a/src/Mobs/Villager.cpp b/src/Mobs/Villager.cpp
index 5c9999a59..963595347 100644
--- a/src/Mobs/Villager.cpp
+++ b/src/Mobs/Villager.cpp
@@ -37,6 +37,13 @@ bool cVillager::DoTakeDamage(TakeDamageInfo & a_TDI)
 			m_World->BroadcastEntityStatus(*this, esVillagerAngry);
 		}
 	}
+
+	if (a_TDI.DamageType == dtLightning)
+	{
+		Destroy();
+		m_World->SpawnMob(GetPosX(), GetPosY(), GetPosZ(), mtWitch);
+		return true;
+	}
 	return true;
 }
 
diff --git a/src/Mobs/Witch.cpp b/src/Mobs/Witch.cpp
index 747a11f97..a3cadbaa0 100644
--- a/src/Mobs/Witch.cpp
+++ b/src/Mobs/Witch.cpp
@@ -2,6 +2,7 @@
 #include "Globals.h"  // NOTE: MSVC stupidness requires this to be the same across all modules
 
 #include "Witch.h"
+#include "FastRandom.h"
 
 
 
diff --git a/src/Mobs/Witch.h b/src/Mobs/Witch.h
index 03691fef1..8230e1f98 100644
--- a/src/Mobs/Witch.h
+++ b/src/Mobs/Witch.h
@@ -2,7 +2,6 @@
 #pragma once
 
 #include "AggressiveMonster.h"
-#include "../MersenneTwister.h"
 
 
 
diff --git a/src/Noise/CMakeLists.txt b/src/Noise/CMakeLists.txt
new file mode 100644
index 000000000..e1837500f
--- /dev/null
+++ b/src/Noise/CMakeLists.txt
@@ -0,0 +1,21 @@
+
+cmake_minimum_required (VERSION 2.6)
+project (MCServer)
+
+include_directories ("${PROJECT_SOURCE_DIR}/../")
+
+SET (SRCS
+	Noise.cpp
+)
+
+SET (HDRS
+	Noise.h
+	OctavedNoise.h
+	RidgedNoise.h
+)
+
+if(NOT MSVC)
+	add_library(Noise ${SRCS} ${HDRS})
+
+	target_link_libraries(Noise OSSupport)
+endif()
diff --git a/src/Noise/InterpolNoise.h b/src/Noise/InterpolNoise.h
new file mode 100644
index 000000000..683b54563
--- /dev/null
+++ b/src/Noise/InterpolNoise.h
@@ -0,0 +1,524 @@
+
+// InterpolNoise.h
+
+// Implements the cInterpolNoise class template representing a noise that interpolates the values between integer coords from a single set of neighbors
+
+
+
+
+
+#pragma once
+
+#include "Noise.h"
+
+#define FAST_FLOOR(x) (((x) < 0) ? (((int)x) - 1) : ((int)x))
+
+
+
+
+
+////////////////////////////////////////////////////////////////////////////////
+// cInterpolCell2D:
+
+template <typename T>
+class cInterpolCell2D
+{
+public:
+	cInterpolCell2D(
+		const cNoise & a_Noise,    ///< Noise to use for generating the random values
+		NOISE_DATATYPE * a_Array,  ///< Array to generate into [x + a_SizeX * y]
+		int a_SizeX, int a_SizeY,  ///< Count of the array, in each direction
+		const NOISE_DATATYPE * a_FracX,  ///< Pointer to the array that stores the X fractional values
+		const NOISE_DATATYPE * a_FracY   ///< Pointer to the attay that stores the Y fractional values
+	):
+		m_Noise(a_Noise),
+		m_WorkRnds(&m_Workspace1),
+		m_CurFloorX(0),
+		m_CurFloorY(0),
+		m_Array(a_Array),
+		m_SizeX(a_SizeX),
+		m_SizeY(a_SizeY),
+		m_FracX(a_FracX),
+		m_FracY(a_FracY)
+	{
+	}
+	
+
+	/** Generates part of the output noise array using the current m_WorkRnds[] values */
+	void Generate(
+		int a_FromX, int a_ToX,
+		int a_FromY, int a_ToY
+	)
+	{
+		for (int y = a_FromY; y < a_ToY; y++)
+		{
+			NOISE_DATATYPE Interp[2];
+			NOISE_DATATYPE FracY = T::coeff(m_FracY[y]);
+			Interp[0] = Lerp((*m_WorkRnds)[0][0], (*m_WorkRnds)[0][1], FracY);
+			Interp[1] = Lerp((*m_WorkRnds)[1][0], (*m_WorkRnds)[1][1], FracY);
+			int idx = y * m_SizeX + a_FromX;
+			for (int x = a_FromX; x < a_ToX; x++)
+			{
+				m_Array[idx++] = Lerp(Interp[0], Interp[1], T::coeff(m_FracX[x]));
+			}  // for x
+		}  // for y
+	}
+	
+
+	/** Initializes m_WorkRnds[] with the specified values of the noise at the specified integral coords. */
+	void InitWorkRnds(int a_FloorX, int a_FloorY)
+	{
+		m_CurFloorX = a_FloorX;
+		m_CurFloorY = a_FloorY;
+		(*m_WorkRnds)[0][0] = m_Noise.IntNoise2D(m_CurFloorX,     m_CurFloorY);
+		(*m_WorkRnds)[0][1] = m_Noise.IntNoise2D(m_CurFloorX,     m_CurFloorY + 1);
+		(*m_WorkRnds)[1][0] = m_Noise.IntNoise2D(m_CurFloorX + 1, m_CurFloorY);
+		(*m_WorkRnds)[1][1] = m_Noise.IntNoise2D(m_CurFloorX + 1, m_CurFloorY + 1);
+	}
+	
+
+	/** Updates m_WorkRnds[] for the new integral coords */
+	void Move(int a_NewFloorX, int a_NewFloorY)
+	{
+		// Swap the doublebuffer:
+		int OldFloorX = m_CurFloorX;
+		int OldFloorY = m_CurFloorY;
+		Workspace * OldWorkRnds = m_WorkRnds;
+		m_WorkRnds = (m_WorkRnds == &m_Workspace1) ? &m_Workspace2 : &m_Workspace1;
+	
+		// Reuse as much of the old workspace as possible:
+		// TODO: Try out if simply calculating all 4 elements each time is faster than this monster loop
+		int DiffX = OldFloorX - a_NewFloorX;
+		int DiffY = OldFloorY - a_NewFloorY;
+		for (int x = 0; x < 2; x++)
+		{
+			int cx = a_NewFloorX + x;
+			int OldX = x - DiffX;  // Where would this X be in the old grid?
+			for (int y = 0; y < 2; y++)
+			{
+				int cy = a_NewFloorY + y;
+				int OldY = y - DiffY;  // Where would this Y be in the old grid?
+				if ((OldX >= 0) && (OldX < 2) && (OldY >= 0) && (OldY < 2))
+				{
+					(*m_WorkRnds)[x][y] = (*OldWorkRnds)[OldX][OldY];
+				}
+				else
+				{
+					(*m_WorkRnds)[x][y] = (NOISE_DATATYPE)m_Noise.IntNoise2D(cx, cy);
+				}
+			}
+		}
+		m_CurFloorX = a_NewFloorX;
+		m_CurFloorY = a_NewFloorY;
+	}
+
+protected:
+	typedef NOISE_DATATYPE Workspace[2][2];
+	
+	/** The noise used for generating the values at integral coords. */
+	const cNoise & m_Noise;
+	
+	/** The current random values; points to either m_Workspace1 or m_Workspace2 (doublebuffering) */
+	Workspace * m_WorkRnds;
+
+	/** Buffer 1 for workspace doublebuffering, used in Move() */
+	Workspace m_Workspace1;
+
+	/** Buffer 2 for workspace doublebuffering, used in Move() */
+	Workspace m_Workspace2;
+
+	/** Coords of the currently calculated m_WorkRnds[]. */
+	int m_CurFloorX, m_CurFloorY;
+	
+	/** The output array to generate into. */
+	NOISE_DATATYPE * m_Array;
+
+	/** Dimensions of the output array. */
+	int m_SizeX, m_SizeY;
+
+	/** Arrays holding the fractional values of the coords in each direction. */
+	const NOISE_DATATYPE * m_FracX;
+	const NOISE_DATATYPE * m_FracY;
+} ;
+
+
+
+
+
+////////////////////////////////////////////////////////////////////////////////
+// cInterpolCell3D:
+
+/** Holds a cache of the last calculated integral noise values and interpolates between them en masse.
+Provides a massive optimization for cInterpolNoise.
+Works by calculating multiple noise values (that have the same integral noise coords) at once. The underlying noise values
+needn't be recalculated for these values, only the interpolation is done within the unit cube. */
+template <typename T>
+class cInterpolCell3D
+{
+public:
+	cInterpolCell3D(
+		const cNoise & a_Noise,                 ///< Noise to use for generating the random values
+		NOISE_DATATYPE * a_Array,               ///< Array to generate into [x + a_SizeX * y]
+		int a_SizeX, int a_SizeY, int a_SizeZ,  ///< Count of the array, in each direction
+		const NOISE_DATATYPE * a_FracX,         ///< Pointer to the array that stores the X fractional values
+		const NOISE_DATATYPE * a_FracY,         ///< Pointer to the attay that stores the Y fractional values
+		const NOISE_DATATYPE * a_FracZ          ///< Pointer to the array that stores the Z fractional values
+	):
+		m_Noise(a_Noise),
+		m_WorkRnds(&m_Workspace1),
+		m_CurFloorX(0),
+		m_CurFloorY(0),
+		m_CurFloorZ(0),
+		m_Array(a_Array),
+		m_SizeX(a_SizeX),
+		m_SizeY(a_SizeY),
+		m_SizeZ(a_SizeZ),
+		m_FracX(a_FracX),
+		m_FracY(a_FracY),
+		m_FracZ(a_FracZ)
+	{
+	}
+
+
+	/** Generates part of the output array using current m_WorkRnds[]. */
+	void Generate(
+		int a_FromX, int a_ToX,
+		int a_FromY, int a_ToY,
+		int a_FromZ, int a_ToZ
+	)
+	{
+		for (int z = a_FromZ; z < a_ToZ; z++)
+		{
+			int idxZ = z * m_SizeX * m_SizeY;
+			NOISE_DATATYPE Interp2[2][2];
+			NOISE_DATATYPE FracZ = T::coeff(m_FracZ[z]);
+			for (int x = 0; x < 2; x++)
+			{
+				for (int y = 0; y < 2; y++)
+				{
+					Interp2[x][y] = Lerp((*m_WorkRnds)[x][y][0], (*m_WorkRnds)[x][y][1], FracZ);
+				}
+			}
+			for (int y = a_FromY; y < a_ToY; y++)
+			{
+				NOISE_DATATYPE Interp[2];
+				NOISE_DATATYPE FracY = T::coeff(m_FracY[y]);
+				Interp[0] = Lerp(Interp2[0][0], Interp2[0][1], FracY);
+				Interp[1] = Lerp(Interp2[1][0], Interp2[1][1], FracY);
+				int idx = idxZ + y * m_SizeX + a_FromX;
+				for (int x = a_FromX; x < a_ToX; x++)
+				{
+					m_Array[idx++] = Lerp(Interp[0], Interp[1], T::coeff(m_FracX[x]));
+				}  // for x
+			}  // for y
+		}  // for z
+	}
+
+
+	/** Initializes m_WorkRnds[] with the specified Floor values. */
+	void InitWorkRnds(int a_FloorX, int a_FloorY, int a_FloorZ)
+	{
+		m_CurFloorX = a_FloorX;
+		m_CurFloorY = a_FloorY;
+		m_CurFloorZ = a_FloorZ;
+		(*m_WorkRnds)[0][0][0] = (NOISE_DATATYPE)m_Noise.IntNoise3D(m_CurFloorX,     m_CurFloorY,     m_CurFloorZ);
+		(*m_WorkRnds)[0][0][1] = (NOISE_DATATYPE)m_Noise.IntNoise3D(m_CurFloorX,     m_CurFloorY,     m_CurFloorZ + 1);
+		(*m_WorkRnds)[0][1][0] = (NOISE_DATATYPE)m_Noise.IntNoise3D(m_CurFloorX,     m_CurFloorY + 1, m_CurFloorZ);
+		(*m_WorkRnds)[0][1][1] = (NOISE_DATATYPE)m_Noise.IntNoise3D(m_CurFloorX,     m_CurFloorY + 1, m_CurFloorZ + 1);
+		(*m_WorkRnds)[1][0][0] = (NOISE_DATATYPE)m_Noise.IntNoise3D(m_CurFloorX + 1, m_CurFloorY,     m_CurFloorZ);
+		(*m_WorkRnds)[1][0][1] = (NOISE_DATATYPE)m_Noise.IntNoise3D(m_CurFloorX + 1, m_CurFloorY,     m_CurFloorZ + 1);
+		(*m_WorkRnds)[1][1][0] = (NOISE_DATATYPE)m_Noise.IntNoise3D(m_CurFloorX + 1, m_CurFloorY + 1, m_CurFloorZ);
+		(*m_WorkRnds)[1][1][1] = (NOISE_DATATYPE)m_Noise.IntNoise3D(m_CurFloorX + 1, m_CurFloorY + 1, m_CurFloorZ + 1);
+	}
+
+
+	/** Updates m_WorkRnds[] for the new Floor values. */
+	void Move(int a_NewFloorX, int a_NewFloorY, int a_NewFloorZ)
+	{
+		// Swap the doublebuffer:
+		int OldFloorX = m_CurFloorX;
+		int OldFloorY = m_CurFloorY;
+		int OldFloorZ = m_CurFloorZ;
+		Workspace * OldWorkRnds = m_WorkRnds;
+		m_WorkRnds = (m_WorkRnds == &m_Workspace1) ? &m_Workspace2 : &m_Workspace1;
+
+		// Reuse as much of the old workspace as possible:
+		// TODO: Try out if simply calculating all 8 elements each time is faster than this monster loop
+		int DiffX = OldFloorX - a_NewFloorX;
+		int DiffY = OldFloorY - a_NewFloorY;
+		int DiffZ = OldFloorZ - a_NewFloorZ;
+		for (int x = 0; x < 2; x++)
+		{
+			int cx = a_NewFloorX + x;
+			int OldX = x - DiffX;  // Where would this X be in the old grid?
+			for (int y = 0; y < 2; y++)
+			{
+				int cy = a_NewFloorY + y;
+				int OldY = y - DiffY;  // Where would this Y be in the old grid?
+				for (int z = 0; z < 2; z++)
+				{
+					int cz = a_NewFloorZ + z;
+					int OldZ = z - DiffZ;
+					if ((OldX >= 0) && (OldX < 2) && (OldY >= 0) && (OldY < 2) && (OldZ >= 0) && (OldZ < 2))
+					{
+						(*m_WorkRnds)[x][y][z] = (*OldWorkRnds)[OldX][OldY][OldZ];
+					}
+					else
+					{
+						(*m_WorkRnds)[x][y][z] = (NOISE_DATATYPE)m_Noise.IntNoise3D(cx, cy, cz);
+					}
+				}  // for z
+			}  // for y
+		}  // for x
+		m_CurFloorX = a_NewFloorX;
+		m_CurFloorY = a_NewFloorY;
+		m_CurFloorZ = a_NewFloorZ;
+	}
+
+protected:
+	typedef NOISE_DATATYPE Workspace[2][2][2];
+
+	/** The noise used for generating the values at integral coords. */
+	const cNoise & m_Noise;
+
+	/** The current random values; points to either m_Workspace1 or m_Workspace2 (doublebuffering) */
+	Workspace * m_WorkRnds;
+
+	/** Buffer 1 for workspace doublebuffering, used in Move() */
+	Workspace m_Workspace1;
+
+	/** Buffer 2 for workspace doublebuffering, used in Move() */
+	Workspace m_Workspace2;
+
+	/** The integral coords of the currently calculated WorkRnds[] */
+	int m_CurFloorX, m_CurFloorY, m_CurFloorZ;
+
+	/** The output array where the noise is calculated. */
+	NOISE_DATATYPE * m_Array;
+
+	/** Dimensions of the output array. */
+	int m_SizeX, m_SizeY, m_SizeZ;
+
+	/** Arrays holding the fractional values of the coords in each direction. */
+	const NOISE_DATATYPE * m_FracX;
+	const NOISE_DATATYPE * m_FracY;
+	const NOISE_DATATYPE * m_FracZ;
+} ;
+
+
+
+
+
+////////////////////////////////////////////////////////////////////////////////
+// cInterpolNoise:
+
+template <typename T>
+class cInterpolNoise
+{
+	/** Maximum size, for each direction, of the generated array. */
+	static const int MAX_SIZE = 256;
+
+public:
+	cInterpolNoise(int a_Seed):
+		m_Noise(a_Seed)
+	{
+	}
+
+
+	/** Sets a new seed for the generators. Relays the seed to the underlying noise. */
+	void SetSeed(int a_Seed)
+	{
+		m_Noise.SetSeed(a_Seed);
+	}
+
+
+	/** Fills a 2D array with the values of the noise. */
+	void Generate2D(
+		NOISE_DATATYPE * a_Array,                        ///< Array to generate into [x + a_SizeX * y]
+		int a_SizeX, int a_SizeY,                        ///< Count of the array, in each direction
+		NOISE_DATATYPE a_StartX, NOISE_DATATYPE a_EndX,  ///< Noise-space coords of the array in the X direction
+		NOISE_DATATYPE a_StartY, NOISE_DATATYPE a_EndY   ///< Noise-space coords of the array in the Y direction
+	) const
+	{
+		ASSERT(a_SizeX > 0);
+		ASSERT(a_SizeY > 0);
+		ASSERT(a_SizeX < MAX_SIZE);
+		ASSERT(a_SizeY < MAX_SIZE);
+		ASSERT(a_StartX < a_EndX);
+		ASSERT(a_StartY < a_EndY);
+	
+		// Calculate the integral and fractional parts of each coord:
+		int FloorX[MAX_SIZE];
+		int FloorY[MAX_SIZE];
+		NOISE_DATATYPE FracX[MAX_SIZE];
+		NOISE_DATATYPE FracY[MAX_SIZE];
+		int SameX[MAX_SIZE];
+		int SameY[MAX_SIZE];
+		int NumSameX, NumSameY;
+		CalcFloorFrac(a_SizeX, a_StartX, a_EndX, FloorX, FracX, SameX, NumSameX);
+		CalcFloorFrac(a_SizeY, a_StartY, a_EndY, FloorY, FracY, SameY, NumSameY);
+	
+		cInterpolCell2D<T> Cell(m_Noise, a_Array, a_SizeX, a_SizeY, FracX, FracY);
+	
+		Cell.InitWorkRnds(FloorX[0], FloorY[0]);
+	
+		// Calculate query values using Cell:
+		int FromY = 0;
+		for (int y = 0; y < NumSameY; y++)
+		{
+			int ToY = FromY + SameY[y];
+			int FromX = 0;
+			int CurFloorY = FloorY[FromY];
+			for (int x = 0; x < NumSameX; x++)
+			{
+				int ToX = FromX + SameX[x];
+				Cell.Generate(FromX, ToX, FromY, ToY);
+				Cell.Move(FloorX[ToX], CurFloorY);
+				FromX = ToX;
+			}  // for x
+			Cell.Move(FloorX[0], FloorY[ToY]);
+			FromY = ToY;
+		}  // for y
+	}
+
+
+	/** Fills a 3D array with the values of the noise. */
+	void Generate3D(
+		NOISE_DATATYPE * a_Array,                        ///< Array to generate into [x + a_SizeX * y + a_SizeX * a_SizeY * z]
+		int a_SizeX, int a_SizeY, int a_SizeZ,           ///< Count of the array, in each direction
+		NOISE_DATATYPE a_StartX, NOISE_DATATYPE a_EndX,  ///< Noise-space coords of the array in the X direction
+		NOISE_DATATYPE a_StartY, NOISE_DATATYPE a_EndY,  ///< Noise-space coords of the array in the Y direction
+		NOISE_DATATYPE a_StartZ, NOISE_DATATYPE a_EndZ   ///< Noise-space coords of the array in the Z direction
+	) const
+	{
+		// Check params:
+		ASSERT(a_SizeX > 1);
+		ASSERT(a_SizeY > 1);
+
+		ASSERT(a_SizeX < MAX_SIZE);
+		ASSERT(a_SizeY < MAX_SIZE);
+		ASSERT(a_SizeZ < MAX_SIZE);
+		ASSERT(a_StartX < a_EndX);
+		ASSERT(a_StartY < a_EndY);
+		ASSERT(a_StartZ < a_EndZ);
+
+		// Calculate the integral and fractional parts of each coord:
+		int FloorX[MAX_SIZE];
+		int FloorY[MAX_SIZE];
+		int FloorZ[MAX_SIZE];
+		NOISE_DATATYPE FracX[MAX_SIZE];
+		NOISE_DATATYPE FracY[MAX_SIZE];
+		NOISE_DATATYPE FracZ[MAX_SIZE];
+		int SameX[MAX_SIZE];
+		int SameY[MAX_SIZE];
+		int SameZ[MAX_SIZE];
+		int NumSameX, NumSameY, NumSameZ;
+		CalcFloorFrac(a_SizeX, a_StartX, a_EndX, FloorX, FracX, SameX, NumSameX);
+		CalcFloorFrac(a_SizeY, a_StartY, a_EndY, FloorY, FracY, SameY, NumSameY);
+		CalcFloorFrac(a_SizeZ, a_StartZ, a_EndZ, FloorZ, FracZ, SameZ, NumSameZ);
+
+		cInterpolCell3D<T> Cell(
+			m_Noise, a_Array,
+			a_SizeX, a_SizeY, a_SizeZ,
+			FracX, FracY, FracZ
+		);
+	
+		Cell.InitWorkRnds(FloorX[0], FloorY[0], FloorZ[0]);
+	
+		// Calculate query values using Cell:
+		int FromZ = 0;
+		for (int z = 0; z < NumSameZ; z++)
+		{
+			int ToZ = FromZ + SameZ[z];
+			int CurFloorZ = FloorZ[FromZ];
+			int FromY = 0;
+			for (int y = 0; y < NumSameY; y++)
+			{
+				int ToY = FromY + SameY[y];
+				int CurFloorY = FloorY[FromY];
+				int FromX = 0;
+				for (int x = 0; x < NumSameX; x++)
+				{
+					int ToX = FromX + SameX[x];
+					Cell.Generate(FromX, ToX, FromY, ToY, FromZ, ToZ);
+					Cell.Move(FloorX[ToX], CurFloorY, CurFloorZ);
+					FromX = ToX;
+				}
+				Cell.Move(FloorX[0], FloorY[ToY], CurFloorZ);
+				FromY = ToY;
+			}  // for y
+			Cell.Move(FloorX[0], FloorY[0], FloorZ[ToZ]);
+			FromZ = ToZ;
+		}  // for z
+	}
+
+protected:
+
+	/** The noise used for the underlying value generation. */
+	cNoise m_Noise;
+
+
+	/** Calculates the integral and fractional parts along one axis.
+	a_Floor will receive the integral parts (array of a_Size ints).
+	a_Frac will receive the fractional parts (array of a_Size floats).
+	a_Same will receive the counts of items that have the same integral parts (array of up to a_Size ints).
+	a_NumSame will receive the count of a_Same elements (total count of different integral parts). */
+	void CalcFloorFrac(
+		int a_Size,
+		NOISE_DATATYPE a_Start, NOISE_DATATYPE a_End,
+		int * a_Floor, NOISE_DATATYPE * a_Frac,
+		int * a_Same, int & a_NumSame
+	) const
+	{
+		ASSERT(a_Size > 0);
+
+		// Calculate the floor and frac values:
+		NOISE_DATATYPE val = a_Start;
+		NOISE_DATATYPE dif = (a_End - a_Start) / (a_Size - 1);
+		for (int i = 0; i < a_Size; i++)
+		{
+			a_Floor[i] = FAST_FLOOR(val);
+			a_Frac[i] = val - a_Floor[i];
+			val += dif;
+		}
+
+		// Mark up the same floor values into a_Same / a_NumSame:
+		int CurFloor = a_Floor[0];
+		int LastSame = 0;
+		a_NumSame = 0;
+		for (int i = 1; i < a_Size; i++)
+		{
+			if (a_Floor[i] != CurFloor)
+			{
+				a_Same[a_NumSame] = i - LastSame;
+				LastSame = i;
+				a_NumSame += 1;
+				CurFloor = a_Floor[i];
+			}
+		}  // for i - a_Floor[]
+		if (LastSame < a_Size)
+		{
+			a_Same[a_NumSame] = a_Size - LastSame;
+			a_NumSame += 1;
+		}
+	}
+};
+
+
+
+
+
+/** A fifth-degree curve for interpolating.
+Implemented as a functor for better chance of inlining. */
+struct Interp5Deg
+{
+	static NOISE_DATATYPE coeff(NOISE_DATATYPE a_Val)
+	{
+		return a_Val * a_Val * a_Val * (a_Val * (a_Val * 6 - 15) + 10);
+	}
+};
+
+typedef cInterpolNoise<Interp5Deg> cInterp5DegNoise;
+
+
+
diff --git a/src/Noise.cpp b/src/Noise/Noise.cpp
index 8fcfe2920..0249ab6c1 100644
--- a/src/Noise.cpp
+++ b/src/Noise/Noise.cpp
@@ -9,10 +9,110 @@
 
 
 
+#if 0
+/** cImprovedPerlin noise test suite:
+- Generate a rather large 2D and 3D noise array and output it to a file
+- Compare performance of cCubicNoise and cImprovedNoise, both in single-value and 3D-array usages */
+static class cImprovedPerlinNoiseTest
+{
+public:
+	cImprovedPerlinNoiseTest(void)
+	{
+		printf("Performing Improved Perlin Noise tests...\n");
+		TestImage();
+		TestSpeed();
+		TestSpeedArr();
+		printf("Improved Perlin Noise tests complete.\n");
+	}
+
+
+	/** Tests the noise by generating 2D and 3D images and dumping them to files. */
+	void TestImage(void)
+	{
+		static const int SIZE_X = 256;
+		static const int SIZE_Y = 256;
+		static const int SIZE_Z = 16;
+
+		cImprovedNoise noise(1);
+		std::unique_ptr<NOISE_DATATYPE[]> arr(new NOISE_DATATYPE[SIZE_X * SIZE_Y * SIZE_Z]);
+		noise.Generate3D(arr.get(), SIZE_X, SIZE_Y, SIZE_Z, 0, 14, 0, 14, 0, 14);
+		Debug3DNoise(arr.get(), SIZE_X, SIZE_Y, SIZE_Z, "ImprovedPerlinNoiseTest3D", 128);
+		noise.Generate2D(arr.get(), SIZE_X, SIZE_Y, 0, 14, 15, 28);
+		Debug2DNoise(arr.get(), SIZE_X, SIZE_Y, "ImprovedPerlinNoiseTest2D", 128);
+	}
+
+
+	/** Tests the speeds of cImprovedPerlin and cCubicNoise when generating individual values. */
+	void TestSpeed(void)
+	{
+		cImprovedNoise improvedNoise(1);
+		cNoise         noise(1);
+		cTimer timer;
+
+		// Measure the improvedNoise:
+		NOISE_DATATYPE sum = 0;
+		long long start = timer.GetNowTime();
+		for (int i = 0; i < 100000000; i++)
+		{
+			sum += improvedNoise.GetValueAt(i, 0, -i);
+		}
+		long long finish = timer.GetNowTime();
+		printf("cImprovedNoise took %.2f seconds; total is %f.\n", static_cast<float>(finish - start) / 1000.0f, sum);
+
+		// Measure the cubicNoise:
+		sum = 0;
+		start = timer.GetNowTime();
+		for (int i = 0; i < 100000000; i++)
+		{
+			sum += noise.IntNoise3D(i, 0, -i);
+		}
+		finish = timer.GetNowTime();
+		printf("cCubicNoise took %.2f seconds; total is %f.\n", static_cast<float>(finish - start) / 1000.0f, sum);
+	}
+
+
+	/** Tests the speeds of cImprovedPerlin and cCubicNoise when generating arrays. */
+	void TestSpeedArr(void)
+	{
+		static const int SIZE_X = 256;
+		static const int SIZE_Y = 256;
+		static const int SIZE_Z = 16;
+
+		std::unique_ptr<NOISE_DATATYPE[]> arr(new NOISE_DATATYPE[SIZE_X * SIZE_Y * SIZE_Z]);
+		cTimer timer;
+		cImprovedNoise improvedNoise(1);
+		cCubicNoise    cubicNoise(1);
+
+		// Measure the improvedNoise:
+		long long start = timer.GetNowTime();
+		for (int i = 0; i < 40; i++)
+		{
+			improvedNoise.Generate3D(arr.get(), SIZE_X, SIZE_Y, SIZE_Z, 0, 14, 0, 14, 0, 14);
+		}
+		long long finish = timer.GetNowTime();
+		printf("cImprovedNoise(arr) took %.2f seconds.\n", static_cast<float>(finish - start) / 1000.0f);
+
+		// Measure the cubicNoise:
+		start = timer.GetNowTime();
+		for (int i = 0; i < 40; i++)
+		{
+			cubicNoise.Generate3D(arr.get(), SIZE_X, SIZE_Y, SIZE_Z, 0, 14, 0, 14, 0, 14);
+		}
+		finish = timer.GetNowTime();
+		printf("cCubicNoise(arr) took %.2f seconds.\n", static_cast<float>(finish - start) / 1000.0f);
+	}
+} g_Test;
+
+#endif
+
+
+
+
+
 ////////////////////////////////////////////////////////////////////////////////
 // Globals:
 
-void Debug3DNoise(const NOISE_DATATYPE * a_Noise, int a_SizeX, int a_SizeY, int a_SizeZ, const AString & a_FileNameBase)
+void Debug3DNoise(const NOISE_DATATYPE * a_Noise, int a_SizeX, int a_SizeY, int a_SizeZ, const AString & a_FileNameBase, NOISE_DATATYPE a_Coeff)
 {
 	const int BUF_SIZE = 512;
 	ASSERT(a_SizeX <= BUF_SIZE);  // Just stretch it, if needed
@@ -29,7 +129,7 @@ void Debug3DNoise(const NOISE_DATATYPE * a_Noise, int a_SizeX, int a_SizeY, int
 				unsigned char buf[BUF_SIZE];
 				for (int x = 0; x < a_SizeX; x++)
 				{
-					buf[x] = (unsigned char)(std::min(255, std::max(0, (int)(128 + 32 * a_Noise[idx++]))));
+					buf[x] = static_cast<unsigned char>(Clamp((int)(128 + a_Coeff * a_Noise[idx++]), 0, 255));
 				}
 				f1.Write(buf, a_SizeX);
 			}  // for y
@@ -50,7 +150,7 @@ void Debug3DNoise(const NOISE_DATATYPE * a_Noise, int a_SizeX, int a_SizeY, int
 				unsigned char buf[BUF_SIZE];
 				for (int x = 0; x < a_SizeX; x++)
 				{
-					buf[x] = (unsigned char)(std::min(255, std::max(0, (int)(128 + 32 * a_Noise[idx++]))));
+					buf[x] = static_cast<unsigned char>(Clamp((int)(128 + a_Coeff * a_Noise[idx++]), 0, 255));
 				}
 				f2.Write(buf, a_SizeX);
 			}  // for z
@@ -65,7 +165,7 @@ void Debug3DNoise(const NOISE_DATATYPE * a_Noise, int a_SizeX, int a_SizeY, int
 
 
 
-void Debug2DNoise(const NOISE_DATATYPE * a_Noise, int a_SizeX, int a_SizeY, const AString & a_FileNameBase)
+void Debug2DNoise(const NOISE_DATATYPE * a_Noise, int a_SizeX, int a_SizeY, const AString & a_FileNameBase, NOISE_DATATYPE a_Coeff)
 {
 	const int BUF_SIZE = 512;
 	ASSERT(a_SizeX <= BUF_SIZE);  // Just stretch it, if needed
@@ -79,7 +179,7 @@ void Debug2DNoise(const NOISE_DATATYPE * a_Noise, int a_SizeX, int a_SizeY, cons
 			unsigned char buf[BUF_SIZE];
 			for (int x = 0; x < a_SizeX; x++)
 			{
-				buf[x] = (unsigned char)(std::min(255, std::max(0, (int)(128 + 32 * a_Noise[idx++]))));
+				buf[x] = static_cast<unsigned char>(Clamp((int)(128 + a_Coeff * a_Noise[idx++]), 0, 255));
 			}
 			f1.Write(buf, a_SizeX);
 		}  // for y
@@ -594,13 +694,6 @@ NOISE_DATATYPE cNoise::CubicNoise3D(NOISE_DATATYPE a_X, NOISE_DATATYPE a_Y, NOIS
 ////////////////////////////////////////////////////////////////////////////////
 // cCubicNoise:
 
-#ifdef _DEBUG
-	int cCubicNoise::m_NumSingleX = 0;
-	int cCubicNoise::m_NumSingleXY = 0;
-	int cCubicNoise::m_NumSingleY = 0;
-	int cCubicNoise::m_NumCalls = 0;
-#endif  // _DEBUG
-
 cCubicNoise::cCubicNoise(int a_Seed) :
 	m_Noise(a_Seed)
 {
@@ -639,23 +732,6 @@ void cCubicNoise::Generate2D(
 	
 	Cell.InitWorkRnds(FloorX[0], FloorY[0]);
 	
-	#ifdef _DEBUG
-		// Statistics on the noise-space coords:
-		if (NumSameX == 1)
-		{
-			m_NumSingleX++;
-			if (NumSameY == 1)
-			{
-				m_NumSingleXY++;
-			}
-		}
-		if (NumSameY == 1)
-		{
-			m_NumSingleY++;
-		}
-		m_NumCalls++;
-	#endif  // _DEBUG
-	
 	// Calculate query values using Cell:
 	int FromY = 0;
 	for (int y = 0; y < NumSameY; y++)
@@ -792,101 +868,28 @@ void cCubicNoise::CalcFloorFrac(
 
 
 ////////////////////////////////////////////////////////////////////////////////
-// cPerlinNoise:
-
-cPerlinNoise::cPerlinNoise(void) :
-	m_Seed(0)
-{
-}
-
-
-
+// cImprovedNoise:
 
-
-cPerlinNoise::cPerlinNoise(int a_Seed) :
-	m_Seed(a_Seed)
-{
-}
-
-
-
-
-
-void cPerlinNoise::SetSeed(int a_Seed)
-{
-	m_Seed = a_Seed;
-}
-
-
-
-
-
-void cPerlinNoise::AddOctave(float a_Frequency, float a_Amplitude)
-{
-	m_Octaves.push_back(cOctave(m_Seed * ((int)m_Octaves.size() + 4) * 4 + 1024, a_Frequency, a_Amplitude));
-}
-
-
-
-
-
-void cPerlinNoise::Generate2D(
-	NOISE_DATATYPE * a_Array,                        ///< Array to generate into [x + a_SizeX * y]
-	int a_SizeX, int a_SizeY,                        ///< Count of the array, in each direction
-	NOISE_DATATYPE a_StartX, NOISE_DATATYPE a_EndX,  ///< Noise-space coords of the array in the X direction
-	NOISE_DATATYPE a_StartY, NOISE_DATATYPE a_EndY,  ///< Noise-space coords of the array in the Y direction
-	NOISE_DATATYPE * a_Workspace                     ///< Workspace that this function can use and trash
-) const
+cImprovedNoise::cImprovedNoise(int a_Seed)
 {
-	if (m_Octaves.empty())
-	{
-		// No work to be done
-		ASSERT(!"Perlin: No octaves to generate!");
-		return;
-	}
-	
-	bool ShouldFreeWorkspace = (a_Workspace == nullptr);
-	int ArrayCount = a_SizeX * a_SizeY;
-	if (ShouldFreeWorkspace)
-	{
-		a_Workspace = new NOISE_DATATYPE[ArrayCount];
-	}
-	
-	// Generate the first octave directly into array:
-	const cOctave & FirstOctave = m_Octaves.front();
-	
-	FirstOctave.m_Noise.Generate2D(
-		a_Workspace, a_SizeX, a_SizeY,
-		a_StartX * FirstOctave.m_Frequency, a_EndX * FirstOctave.m_Frequency,
-		a_StartY * FirstOctave.m_Frequency, a_EndY * FirstOctave.m_Frequency
-	);
-	NOISE_DATATYPE Amplitude = FirstOctave.m_Amplitude;
-	for (int i = 0; i < ArrayCount; i++)
+	// Initialize the permutations with identity:
+	for (int i = 0; i < 256; i++)
 	{
-		a_Array[i] = a_Workspace[i] * Amplitude;
+		m_Perm[i] = i;
 	}
-	
-	// Add each octave:
-	for (cOctaves::const_iterator itr = m_Octaves.begin() + 1, end = m_Octaves.end(); itr != end; ++itr)
+
+	// Randomize the permutation table - swap each element with a random other element:
+	cNoise noise(a_Seed);
+	for (int i = 0; i < 256; i++)
 	{
-		// Generate cubic noise for the octave:
-		itr->m_Noise.Generate2D(
-			a_Workspace, a_SizeX, a_SizeY,
-			a_StartX * itr->m_Frequency, a_EndX * itr->m_Frequency,
-			a_StartY * itr->m_Frequency, a_EndY * itr->m_Frequency
-		);
-		// Add the cubic noise into the output:
-		NOISE_DATATYPE Amplitude = itr->m_Amplitude;
-		for (int i = 0; i < ArrayCount; i++)
-		{
-			a_Array[i] += a_Workspace[i] * Amplitude;
-		}
+		int rnd = (noise.IntNoise1DInt(i) / 7) % 256;
+		std::swap(m_Perm[i], m_Perm[rnd]);
 	}
-	
-	if (ShouldFreeWorkspace)
+
+	// Copy the lower 256 entries into upper 256 entries:
+	for (int i = 0; i < 256; i++)
 	{
-		delete[] a_Workspace;
-		a_Workspace = nullptr;
+		m_Perm[i + 256] = m_Perm[i];
 	}
 }
 
@@ -894,239 +897,132 @@ void cPerlinNoise::Generate2D(
 
 
 
-void cPerlinNoise::Generate3D(
-	NOISE_DATATYPE * a_Array,                        ///< Array to generate into [x + a_SizeX * y + a_SizeX * a_SizeY * z]
-	int a_SizeX, int a_SizeY, int a_SizeZ,           ///< Count of the array, in each direction
-	NOISE_DATATYPE a_StartX, NOISE_DATATYPE a_EndX,  ///< Noise-space coords of the array in the X direction
-	NOISE_DATATYPE a_StartY, NOISE_DATATYPE a_EndY,  ///< Noise-space coords of the array in the Y direction
-	NOISE_DATATYPE a_StartZ, NOISE_DATATYPE a_EndZ,  ///< Noise-space coords of the array in the Z direction
-	NOISE_DATATYPE * a_Workspace                     ///< Workspace that this function can use and trash
+void cImprovedNoise::Generate2D(
+	NOISE_DATATYPE * a_Array,
+	int a_SizeX, int a_SizeY,
+	NOISE_DATATYPE a_StartX, NOISE_DATATYPE a_EndX,
+	NOISE_DATATYPE a_StartY, NOISE_DATATYPE a_EndY
 ) const
 {
-	if (m_Octaves.empty())
-	{
-		// No work to be done
-		ASSERT(!"Perlin: No octaves to generate!");
-		return;
-	}
-	
-	bool ShouldFreeWorkspace = (a_Workspace == nullptr);
-	int ArrayCount = a_SizeX * a_SizeY * a_SizeZ;
-	if (ShouldFreeWorkspace)
+	size_t idx = 0;
+	for (int y = 0; y < a_SizeY; y++)
 	{
-		a_Workspace = new NOISE_DATATYPE[ArrayCount];
-	}
-	
-	// Generate the first octave directly into array:
-	const cOctave & FirstOctave = m_Octaves.front();
-
-	FirstOctave.m_Noise.Generate3D(
-		a_Workspace, a_SizeX, a_SizeY, a_SizeZ,
-		a_StartX * FirstOctave.m_Frequency, a_EndX * FirstOctave.m_Frequency,
-		a_StartY * FirstOctave.m_Frequency, a_EndY * FirstOctave.m_Frequency,
-		a_StartZ * FirstOctave.m_Frequency, a_EndZ * FirstOctave.m_Frequency
-	);
-	NOISE_DATATYPE Amplitude = FirstOctave.m_Amplitude;
-	for (int i = 0; i < ArrayCount; i++)
-	{
-		a_Array[i] = a_Workspace[i] * Amplitude;
-	}
-	
-	// Add each octave:
-	for (cOctaves::const_iterator itr = m_Octaves.begin() + 1, end = m_Octaves.end(); itr != end; ++itr)
-	{
-		// Generate cubic noise for the octave:
-		itr->m_Noise.Generate3D(
-			a_Workspace, a_SizeX, a_SizeY, a_SizeZ,
-			a_StartX * itr->m_Frequency, a_EndX * itr->m_Frequency,
-			a_StartY * itr->m_Frequency, a_EndY * itr->m_Frequency,
-			a_StartZ * itr->m_Frequency, a_EndZ * itr->m_Frequency
-		);
-		// Add the cubic noise into the output:
-		NOISE_DATATYPE Amplitude = itr->m_Amplitude;
-		for (int i = 0; i < ArrayCount; i++)
+		NOISE_DATATYPE ratioY = static_cast<NOISE_DATATYPE>(y) / (a_SizeY - 1);
+		NOISE_DATATYPE noiseY = Lerp(a_StartY, a_EndY, ratioY);
+		int noiseYInt = FAST_FLOOR(noiseY);
+		int yCoord = noiseYInt & 255;
+		NOISE_DATATYPE noiseYFrac = noiseY - noiseYInt;
+		NOISE_DATATYPE fadeY = Fade(noiseYFrac);
+		for (int x = 0; x < a_SizeX; x++)
 		{
-			a_Array[i] += a_Workspace[i] * Amplitude;
-		}
-	}
-	
-	if (ShouldFreeWorkspace)
-	{
-		delete[] a_Workspace;
-		a_Workspace = nullptr;
-	}
-}
-
-
-
-
-
-////////////////////////////////////////////////////////////////////////////////
-// cRidgedMultiNoise:
-
-cRidgedMultiNoise::cRidgedMultiNoise(void) :
-	m_Seed(0)
-{
-}
-
-
-
-
-
-cRidgedMultiNoise::cRidgedMultiNoise(int a_Seed) :
-	m_Seed(a_Seed)
-{
-}
-
-
-
-
-
-void cRidgedMultiNoise::SetSeed(int a_Seed)
-{
-	m_Seed = a_Seed;
-}
-
-
-
-
-
-void cRidgedMultiNoise::AddOctave(float a_Frequency, float a_Amplitude)
-{
-	m_Octaves.push_back(cOctave(m_Seed * ((int)m_Octaves.size() + 4) * 4 + 1024, a_Frequency, a_Amplitude));
+			NOISE_DATATYPE ratioX = static_cast<NOISE_DATATYPE>(x) / (a_SizeX - 1);
+			NOISE_DATATYPE noiseX = Lerp(a_StartX, a_EndX, ratioX);
+			int noiseXInt = FAST_FLOOR(noiseX);
+			int xCoord = noiseXInt & 255;
+			NOISE_DATATYPE noiseXFrac = noiseX - noiseXInt;
+			NOISE_DATATYPE fadeX = Fade(noiseXFrac);
+
+			// Hash the coordinates:
+			int A  = m_Perm[xCoord] + yCoord;
+			int AA = m_Perm[A];
+			int AB = m_Perm[A + 1];
+			int B  = m_Perm[xCoord + 1] + yCoord;
+			int BA = m_Perm[B];
+			int BB = m_Perm[B + 1];
+
+			// Lerp the gradients:
+			a_Array[idx++] = Lerp(
+				Lerp(Grad(m_Perm[AA], noiseXFrac, noiseYFrac,     0), Grad(m_Perm[BA], noiseXFrac - 1, noiseYFrac,     0), fadeX),
+				Lerp(Grad(m_Perm[AB], noiseXFrac, noiseYFrac - 1, 0), Grad(m_Perm[BB], noiseXFrac - 1, noiseYFrac - 1, 0), fadeX),
+				fadeY
+			);
+		}  // for x
+	}  // for y
 }
 
 
 
 
 
-void cRidgedMultiNoise::Generate2D(
-	NOISE_DATATYPE * a_Array,                        ///< Array to generate into [x + a_SizeX * y]
-	int a_SizeX, int a_SizeY,                        ///< Count of the array, in each direction
-	NOISE_DATATYPE a_StartX, NOISE_DATATYPE a_EndX,  ///< Noise-space coords of the array in the X direction
-	NOISE_DATATYPE a_StartY, NOISE_DATATYPE a_EndY,  ///< Noise-space coords of the array in the Y direction
-	NOISE_DATATYPE * a_Workspace                     ///< Workspace that this function can use and trash
+void cImprovedNoise::Generate3D(
+	NOISE_DATATYPE * a_Array,
+	int a_SizeX, int a_SizeY, int a_SizeZ,
+	NOISE_DATATYPE a_StartX, NOISE_DATATYPE a_EndX,
+	NOISE_DATATYPE a_StartY, NOISE_DATATYPE a_EndY,
+	NOISE_DATATYPE a_StartZ, NOISE_DATATYPE a_EndZ
 ) const
 {
-	if (m_Octaves.empty())
-	{
-		// No work to be done
-		ASSERT(!"RidgedMulti: No octaves to generate!");
-		return;
-	}
-	
-	bool ShouldFreeWorkspace = (a_Workspace == nullptr);
-	int ArrayCount = a_SizeX * a_SizeY;
-	if (ShouldFreeWorkspace)
-	{
-		a_Workspace = new NOISE_DATATYPE[ArrayCount];
-	}
-	
-	// Generate the first octave directly into array:
-	const cOctave & FirstOctave = m_Octaves.front();
-	
-	FirstOctave.m_Noise.Generate2D(
-		a_Workspace, a_SizeX, a_SizeY,
-		a_StartX * FirstOctave.m_Frequency, a_EndX * FirstOctave.m_Frequency,
-		a_StartY * FirstOctave.m_Frequency, a_EndY * FirstOctave.m_Frequency
-	);
-	NOISE_DATATYPE Amplitude = FirstOctave.m_Amplitude;
-	for (int i = 0; i < ArrayCount; i++)
+	size_t idx = 0;
+	for (int z = 0; z < a_SizeZ; z++)
 	{
-		a_Array[i] = fabs(a_Workspace[i] * Amplitude);
-	}
-	
-	// Add each octave:
-	for (cOctaves::const_iterator itr = m_Octaves.begin() + 1, end = m_Octaves.end(); itr != end; ++itr)
-	{
-		// Generate cubic noise for the octave:
-		itr->m_Noise.Generate2D(
-			a_Workspace, a_SizeX, a_SizeY,
-			a_StartX * itr->m_Frequency, a_EndX * itr->m_Frequency,
-			a_StartY * itr->m_Frequency, a_EndY * itr->m_Frequency
-		);
-		// Add the cubic noise into the output:
-		NOISE_DATATYPE Amplitude = itr->m_Amplitude;
-		for (int i = 0; i < ArrayCount; i++)
+		NOISE_DATATYPE ratioZ = static_cast<NOISE_DATATYPE>(z) / (a_SizeZ - 1);
+		NOISE_DATATYPE noiseZ = Lerp(a_StartZ, a_EndZ, ratioZ);
+		int noiseZInt = FAST_FLOOR(noiseZ);
+		int zCoord = noiseZInt & 255;
+		NOISE_DATATYPE noiseZFrac = noiseZ - noiseZInt;
+		NOISE_DATATYPE fadeZ = Fade(noiseZFrac);
+		for (int y = 0; y < a_SizeY; y++)
 		{
-			a_Array[i] += fabs(a_Workspace[i] * Amplitude);
-		}
-	}
-	
-	if (ShouldFreeWorkspace)
-	{
-		delete[] a_Workspace;
-		a_Workspace = nullptr;
-	}
+			NOISE_DATATYPE ratioY = static_cast<NOISE_DATATYPE>(y) / (a_SizeY - 1);
+			NOISE_DATATYPE noiseY = Lerp(a_StartY, a_EndY, ratioY);
+			int noiseYInt = FAST_FLOOR(noiseY);
+			int yCoord = noiseYInt & 255;
+			NOISE_DATATYPE noiseYFrac = noiseY - noiseYInt;
+			NOISE_DATATYPE fadeY = Fade(noiseYFrac);
+			for (int x = 0; x < a_SizeX; x++)
+			{
+				NOISE_DATATYPE ratioX = static_cast<NOISE_DATATYPE>(x) / (a_SizeX - 1);
+				NOISE_DATATYPE noiseX = Lerp(a_StartX, a_EndX, ratioX);
+				int noiseXInt = FAST_FLOOR(noiseX);
+				int xCoord = noiseXInt & 255;
+				NOISE_DATATYPE noiseXFrac = noiseX - noiseXInt;
+				NOISE_DATATYPE fadeX = Fade(noiseXFrac);
+
+				// Hash the coordinates:
+				int A  = m_Perm[xCoord] + yCoord;
+				int AA = m_Perm[A] + zCoord;
+				int AB = m_Perm[A + 1] + zCoord;
+				int B  = m_Perm[xCoord + 1] + yCoord;
+				int BA = m_Perm[B] + zCoord;
+				int BB = m_Perm[B + 1] + zCoord;
+
+				// Lerp the gradients:
+				// TODO: This may be optimized by swapping the coords and recalculating most lerps only "once every x"
+				a_Array[idx++] = Lerp(
+					Lerp(
+						Lerp(Grad(m_Perm[AA], noiseXFrac, noiseYFrac,     noiseZFrac), Grad(m_Perm[BA], noiseXFrac - 1, noiseYFrac,     noiseZFrac), fadeX),
+						Lerp(Grad(m_Perm[AB], noiseXFrac, noiseYFrac - 1, noiseZFrac), Grad(m_Perm[BB], noiseXFrac - 1, noiseYFrac - 1, noiseZFrac), fadeX),
+						fadeY
+					),
+					Lerp(
+						Lerp(Grad(m_Perm[AA + 1], noiseXFrac, noiseYFrac,     noiseZFrac - 1), Grad(m_Perm[BA + 1], noiseXFrac - 1, noiseYFrac,     noiseZFrac - 1), fadeX),
+						Lerp(Grad(m_Perm[AB + 1], noiseXFrac, noiseYFrac - 1, noiseZFrac - 1), Grad(m_Perm[BB + 1], noiseXFrac - 1, noiseYFrac - 1, noiseZFrac - 1), fadeX),
+						fadeY
+					),
+					fadeZ
+				);
+			}  // for x
+		}  // for y
+	}  // for z
 }
 
 
 
 
 
-void cRidgedMultiNoise::Generate3D(
-	NOISE_DATATYPE * a_Array,                        ///< Array to generate into [x + a_SizeX * y + a_SizeX * a_SizeY * z]
-	int a_SizeX, int a_SizeY, int a_SizeZ,           ///< Count of the array, in each direction
-	NOISE_DATATYPE a_StartX, NOISE_DATATYPE a_EndX,  ///< Noise-space coords of the array in the X direction
-	NOISE_DATATYPE a_StartY, NOISE_DATATYPE a_EndY,  ///< Noise-space coords of the array in the Y direction
-	NOISE_DATATYPE a_StartZ, NOISE_DATATYPE a_EndZ,  ///< Noise-space coords of the array in the Z direction
-	NOISE_DATATYPE * a_Workspace                     ///< Workspace that this function can use and trash
-) const
+NOISE_DATATYPE cImprovedNoise::GetValueAt(int a_X, int a_Y, int a_Z)
 {
-	if (m_Octaves.empty())
-	{
-		// No work to be done
-		ASSERT(!"RidgedMulti: No octaves to generate!");
-		return;
-	}
-	
-	bool ShouldFreeWorkspace = (a_Workspace == nullptr);
-	int ArrayCount = a_SizeX * a_SizeY * a_SizeZ;
-	if (ShouldFreeWorkspace)
-	{
-		a_Workspace = new NOISE_DATATYPE[ArrayCount];
-	}
-	
-	// Generate the first octave directly into array:
-	const cOctave & FirstOctave = m_Octaves.front();
-
-	FirstOctave.m_Noise.Generate3D(
-		a_Workspace, a_SizeX, a_SizeY, a_SizeZ,
-		a_StartX * FirstOctave.m_Frequency, a_EndX * FirstOctave.m_Frequency,
-		a_StartY * FirstOctave.m_Frequency, a_EndY * FirstOctave.m_Frequency,
-		a_StartZ * FirstOctave.m_Frequency, a_EndZ * FirstOctave.m_Frequency
-	);
-	NOISE_DATATYPE Amplitude = FirstOctave.m_Amplitude;
-	for (int i = 0; i < ArrayCount; i++)
-	{
-		a_Array[i] = a_Workspace[i] * Amplitude;
-	}
-	
-	// Add each octave:
-	for (cOctaves::const_iterator itr = m_Octaves.begin() + 1, end = m_Octaves.end(); itr != end; ++itr)
-	{
-		// Generate cubic noise for the octave:
-		itr->m_Noise.Generate3D(
-			a_Workspace, a_SizeX, a_SizeY, a_SizeZ,
-			a_StartX * itr->m_Frequency, a_EndX * itr->m_Frequency,
-			a_StartY * itr->m_Frequency, a_EndY * itr->m_Frequency,
-			a_StartZ * itr->m_Frequency, a_EndZ * itr->m_Frequency
-		);
-		// Add the cubic noise into the output:
-		NOISE_DATATYPE Amplitude = itr->m_Amplitude;
-		for (int i = 0; i < ArrayCount; i++)
-		{
-			a_Array[i] += a_Workspace[i] * Amplitude;
-		}
-	}
-	
-	if (ShouldFreeWorkspace)
-	{
-		delete[] a_Workspace;
-		a_Workspace = nullptr;
-	}
+	// Hash the coordinates:
+	a_X = a_X & 255;
+	a_Y = a_Y & 255;
+	a_Z = a_Z & 255;
+	int A  = m_Perm[a_X] + a_Y;
+	int AA = m_Perm[A] + a_Z;
+
+	return Grad(m_Perm[AA], 1, 1, 1);
 }
 
 
 
 
+
diff --git a/src/Noise.h b/src/Noise/Noise.h
index b7a90d5b7..323194bfd 100644
--- a/src/Noise.h
+++ b/src/Noise/Noise.h
@@ -7,22 +7,11 @@
 
 #include <cmath>
 
+/** The datatype used by all the noise generators. */
+typedef float NOISE_DATATYPE;
 
-
-
-
-// Some settings
-#define NOISE_DATATYPE float
-
-
-
-
-
-#ifdef _MSC_VER
-	#define INLINE __forceinline
-#else
-	#define INLINE inline
-#endif
+#include "OctavedNoise.h"
+#include "RidgedNoise.h"
 
 
 
@@ -35,20 +24,20 @@ public:
 	cNoise(const cNoise & a_Noise);
 
 	// The following functions, if not marked INLINE, are about 20 % slower
-	INLINE NOISE_DATATYPE IntNoise1D(int a_X) const;
-	INLINE NOISE_DATATYPE IntNoise2D(int a_X, int a_Y) const;
-	INLINE NOISE_DATATYPE IntNoise3D(int a_X, int a_Y, int a_Z) const;
+	inline NOISE_DATATYPE IntNoise1D(int a_X) const;
+	inline NOISE_DATATYPE IntNoise2D(int a_X, int a_Y) const;
+	inline NOISE_DATATYPE IntNoise3D(int a_X, int a_Y, int a_Z) const;
 
 	// Return a float number in the specified range:
-	INLINE NOISE_DATATYPE IntNoise2DInRange(int a_X, int a_Y, float a_Min, float a_Max) const
+	inline NOISE_DATATYPE IntNoise2DInRange(int a_X, int a_Y, float a_Min, float a_Max) const
 	{
 		return a_Min + std::abs(IntNoise2D(a_X, a_Y)) * (a_Max - a_Min);
 	}
 
 	// Note: These functions have a mod8-irregular chance - each of the mod8 remainders has different chance of occurrence. Divide by 8 to rectify.
-	INLINE int IntNoise1DInt(int a_X) const;
-	INLINE int IntNoise2DInt(int a_X, int a_Y) const;
-	INLINE int IntNoise3DInt(int a_X, int a_Y, int a_Z) const;
+	inline int IntNoise1DInt(int a_X) const;
+	inline int IntNoise2DInt(int a_X, int a_Y) const;
+	inline int IntNoise3DInt(int a_X, int a_Y, int a_Z) const;
 
 	NOISE_DATATYPE LinearNoise1D(NOISE_DATATYPE a_X) const;
 	NOISE_DATATYPE CosineNoise1D(NOISE_DATATYPE a_X) const;
@@ -61,9 +50,9 @@ public:
 
 	void SetSeed(int a_Seed) { m_Seed = a_Seed; }
 
-	INLINE static NOISE_DATATYPE CubicInterpolate (NOISE_DATATYPE a_A, NOISE_DATATYPE a_B, NOISE_DATATYPE a_C, NOISE_DATATYPE a_D, NOISE_DATATYPE a_Pct);
-	INLINE static NOISE_DATATYPE CosineInterpolate(NOISE_DATATYPE a_A, NOISE_DATATYPE a_B, NOISE_DATATYPE a_Pct);
-	INLINE static NOISE_DATATYPE LinearInterpolate(NOISE_DATATYPE a_A, NOISE_DATATYPE a_B, NOISE_DATATYPE a_Pct);
+	inline static NOISE_DATATYPE CubicInterpolate (NOISE_DATATYPE a_A, NOISE_DATATYPE a_B, NOISE_DATATYPE a_C, NOISE_DATATYPE a_D, NOISE_DATATYPE a_Pct);
+	inline static NOISE_DATATYPE CosineInterpolate(NOISE_DATATYPE a_A, NOISE_DATATYPE a_B, NOISE_DATATYPE a_Pct);
+	inline static NOISE_DATATYPE LinearInterpolate(NOISE_DATATYPE a_A, NOISE_DATATYPE a_B, NOISE_DATATYPE a_Pct);
 
 private:
 	int m_Seed;
@@ -76,19 +65,15 @@ private:
 class cCubicNoise
 {
 public:
-	static const int MAX_SIZE = 512;  ///< Maximum size of each dimension of the query arrays.
+	/** Maximum size of each dimension of the query arrays. */
+	static const int MAX_SIZE = 512;
 	
 	
+	/** Creates a new instance with the specified seed. */
 	cCubicNoise(int a_Seed);
 	
 	
-	void Generate1D(
-		NOISE_DATATYPE * a_Array,                        ///< Array to generate into
-		int a_SizeX,                                     ///< Count of the array
-		NOISE_DATATYPE a_StartX, NOISE_DATATYPE a_EndX   ///< Noise-space coords of the array
-	) const;
-	
-	
+	/** Fills a 2D array with the values of the noise. */
 	void Generate2D(
 		NOISE_DATATYPE * a_Array,                        ///< Array to generate into [x + a_SizeX * y]
 		int a_SizeX, int a_SizeY,                        ///< Count of the array, in each direction
@@ -97,6 +82,7 @@ public:
 	) const;
 	
 	
+	/** Fills a 3D array with the values of the noise. */
 	void Generate3D(
 		NOISE_DATATYPE * a_Array,                        ///< Array to generate into [x + a_SizeX * y + a_SizeX * a_SizeY * z]
 		int a_SizeX, int a_SizeY, int a_SizeZ,           ///< Count of the array, in each direction
@@ -106,163 +92,87 @@ public:
 	) const;
 	
 protected:
-	typedef NOISE_DATATYPE Workspace1D[4];
-	typedef NOISE_DATATYPE Workspace2D[4][4];
-	
-	cNoise m_Noise;  // Used for integral rnd values
-
-	#ifdef _DEBUG
-		// Statistics on the noise-space coords:
-		static int m_NumSingleX;
-		static int m_NumSingleXY;
-		static int m_NumSingleY;
-		static int m_NumCalls;
-	#endif  // _DEBUG
 	
-	/// Calculates the integral and fractional parts along one axis.
+	/** Noise used for integral random values. */
+	cNoise m_Noise;
+
+
+	/** Calculates the integral and fractional parts along one axis.
+	a_Floor will receive the integral parts (array of a_Size ints).
+	a_Frac will receive the fractional parts (array of a_Size floats).
+	a_Same will receive the counts of items that have the same integral parts (array of up to a_Size ints).
+	a_NumSame will receive the count of a_Same elements (total count of different integral parts). */
 	void CalcFloorFrac(
 		int a_Size,
 		NOISE_DATATYPE a_Start, NOISE_DATATYPE a_End,
 		int * a_Floor, NOISE_DATATYPE * a_Frac,
 		int * a_Same, int & a_NumSame
 	) const;
-	
-	void UpdateWorkRnds2DX(
-		Workspace2D & a_WorkRnds,
-		Workspace1D & a_Interps,
-		int a_LastFloorX, int a_NewFloorX,
-		int a_FloorY,
-		NOISE_DATATYPE a_FractionY
-	) const;
 } ;
 
 
 
 
 
-class cPerlinNoise
+/** Improved noise, as described by Ken Perlin: http://mrl.nyu.edu/~perlin/paper445.pdf
+Implementation adapted from Perlin's Java implementation: http://mrl.nyu.edu/~perlin/noise/ */
+class cImprovedNoise
 {
 public:
-	cPerlinNoise(void);
-	cPerlinNoise(int a_Seed);
-	
-	
-	void SetSeed(int a_Seed);
-	
-	void AddOctave(NOISE_DATATYPE a_Frequency, NOISE_DATATYPE a_Amplitude);
-	
-	void Generate1D(
-		NOISE_DATATYPE * a_Array,                        ///< Array to generate into
-		int a_SizeX,                                     ///< Count of the array
-		NOISE_DATATYPE a_StartX, NOISE_DATATYPE a_EndX,  ///< Noise-space coords of the array
-		NOISE_DATATYPE * a_Workspace = nullptr              ///< Workspace that this function can use and trash
-	) const;
-	
-	
+	/** Constructs a new instance of the noise obbject.
+	Note that this operation is quite expensive (the permutation array being constructed). */
+	cImprovedNoise(int a_Seed);
+
+
+	/** Fills a 2D array with the values of the noise. */
 	void Generate2D(
 		NOISE_DATATYPE * a_Array,                        ///< Array to generate into [x + a_SizeX * y]
 		int a_SizeX, int a_SizeY,                        ///< Count of the array, in each direction
 		NOISE_DATATYPE a_StartX, NOISE_DATATYPE a_EndX,  ///< Noise-space coords of the array in the X direction
-		NOISE_DATATYPE a_StartY, NOISE_DATATYPE a_EndY,  ///< Noise-space coords of the array in the Y direction
-		NOISE_DATATYPE * a_Workspace = nullptr              ///< Workspace that this function can use and trash
+		NOISE_DATATYPE a_StartY, NOISE_DATATYPE a_EndY   ///< Noise-space coords of the array in the Y direction
 	) const;
 	
 	
+	/** Fills a 3D array with the values of the noise. */
 	void Generate3D(
 		NOISE_DATATYPE * a_Array,                        ///< Array to generate into [x + a_SizeX * y + a_SizeX * a_SizeY * z]
 		int a_SizeX, int a_SizeY, int a_SizeZ,           ///< Count of the array, in each direction
 		NOISE_DATATYPE a_StartX, NOISE_DATATYPE a_EndX,  ///< Noise-space coords of the array in the X direction
 		NOISE_DATATYPE a_StartY, NOISE_DATATYPE a_EndY,  ///< Noise-space coords of the array in the Y direction
-		NOISE_DATATYPE a_StartZ, NOISE_DATATYPE a_EndZ,  ///< Noise-space coords of the array in the Z direction
-		NOISE_DATATYPE * a_Workspace = nullptr              ///< Workspace that this function can use and trash
+		NOISE_DATATYPE a_StartZ, NOISE_DATATYPE a_EndZ   ///< Noise-space coords of the array in the Z direction
 	) const;
-	
+
+	/** Returns the value at the specified integral coords. Used for raw speed measurement. */
+	NOISE_DATATYPE GetValueAt(int a_X, int a_Y, int a_Z);
+
 protected:
-	class cOctave
+
+	/** The permutation table used by the noise function. Initialized using seed. */
+	int m_Perm[512];
+
+
+	/** Calculates the fade curve, 6 * t^5 - 15 * t^4 + 10 * t^3. */
+	inline static NOISE_DATATYPE Fade(NOISE_DATATYPE a_T)
 	{
-	public:
-		cCubicNoise m_Noise;
-		
-		NOISE_DATATYPE m_Frequency;  // Coord multiplier
-		NOISE_DATATYPE m_Amplitude;  // Value multiplier
-		
-		cOctave(int a_Seed, NOISE_DATATYPE a_Frequency, NOISE_DATATYPE a_Amplitude) :
-			m_Noise(a_Seed),
-			m_Frequency(a_Frequency),
-			m_Amplitude(a_Amplitude)
-		{
-		}
-	} ;
-	
-	typedef std::vector<cOctave> cOctaves;
-	
-	int      m_Seed;
-	cOctaves m_Octaves;
-} ;
+		return a_T * a_T * a_T * (a_T * (a_T * 6 - 15) + 10);
+	}
 
+	/** Returns the gradient value based on the hash. */
+	inline static NOISE_DATATYPE Grad(int a_Hash, NOISE_DATATYPE a_X, NOISE_DATATYPE a_Y, NOISE_DATATYPE a_Z)
+	{
+		int hash = a_Hash % 16;
+		NOISE_DATATYPE u = (hash < 8) ? a_X : a_Y;
+		NOISE_DATATYPE v = (hash < 4) ? a_Y : (((hash == 12) || (hash == 14)) ? a_X : a_Z);
+		return (((hash & 1) == 0) ? u : -u) + (((hash & 2) == 0) ? v : -v);
+	}
+};
 
 
 
 
-class cRidgedMultiNoise
-{
-public:
-	cRidgedMultiNoise(void);
-	cRidgedMultiNoise(int a_Seed);
-	
-	
-	void SetSeed(int a_Seed);
-	
-	void AddOctave(NOISE_DATATYPE a_Frequency, NOISE_DATATYPE a_Amplitude);
-	
-	void Generate1D(
-		NOISE_DATATYPE * a_Array,                        ///< Array to generate into
-		int a_SizeX,                                     ///< Count of the array
-		NOISE_DATATYPE a_StartX, NOISE_DATATYPE a_EndX,  ///< Noise-space coords of the array
-		NOISE_DATATYPE * a_Workspace = nullptr              ///< Workspace that this function can use and trash
-	) const;
-	
-	
-	void Generate2D(
-		NOISE_DATATYPE * a_Array,                        ///< Array to generate into [x + a_SizeX * y]
-		int a_SizeX, int a_SizeY,                        ///< Count of the array, in each direction
-		NOISE_DATATYPE a_StartX, NOISE_DATATYPE a_EndX,  ///< Noise-space coords of the array in the X direction
-		NOISE_DATATYPE a_StartY, NOISE_DATATYPE a_EndY,  ///< Noise-space coords of the array in the Y direction
-		NOISE_DATATYPE * a_Workspace = nullptr              ///< Workspace that this function can use and trash
-	) const;
-	
-	
-	void Generate3D(
-		NOISE_DATATYPE * a_Array,                        ///< Array to generate into [x + a_SizeX * y + a_SizeX * a_SizeY * z]
-		int a_SizeX, int a_SizeY, int a_SizeZ,           ///< Count of the array, in each direction
-		NOISE_DATATYPE a_StartX, NOISE_DATATYPE a_EndX,  ///< Noise-space coords of the array in the X direction
-		NOISE_DATATYPE a_StartY, NOISE_DATATYPE a_EndY,  ///< Noise-space coords of the array in the Y direction
-		NOISE_DATATYPE a_StartZ, NOISE_DATATYPE a_EndZ,  ///< Noise-space coords of the array in the Z direction
-		NOISE_DATATYPE * a_Workspace = nullptr              ///< Workspace that this function can use and trash
-	) const;
-	
-protected:
-	class cOctave
-	{
-	public:
-		cCubicNoise m_Noise;
-		
-		NOISE_DATATYPE m_Frequency;  // Coord multiplier
-		NOISE_DATATYPE m_Amplitude;  // Value multiplier
-		
-		cOctave(int a_Seed, NOISE_DATATYPE a_Frequency, NOISE_DATATYPE a_Amplitude) :
-			m_Noise(a_Seed),
-			m_Frequency(a_Frequency),
-			m_Amplitude(a_Amplitude)
-		{
-		}
-	} ;
-	
-	typedef std::vector<cOctave> cOctaves;
-	
-	int      m_Seed;
-	cOctaves m_Octaves;
-} ;
+
+typedef cOctavedNoise<cCubicNoise> cPerlinNoise;
+typedef cOctavedNoise<cRidgedNoise<cCubicNoise>> cRidgedMultiNoise;
 
 
 
@@ -376,8 +286,46 @@ NOISE_DATATYPE cNoise::LinearInterpolate(NOISE_DATATYPE a_A, NOISE_DATATYPE a_B,
 ////////////////////////////////////////////////////////////////////////////////
 // Global functions:
 
-extern void Debug2DNoise(const NOISE_DATATYPE * a_Noise, int a_SizeX, int a_SizeY, const AString & a_FileNameBase);
-extern void Debug3DNoise(const NOISE_DATATYPE * a_Noise, int a_SizeX, int a_SizeY, int a_SizeZ, const AString & a_FileNameBase);
+/** Exports the noise array into a file.
+a_Coeff specifies the value that each array value is multiplied by before being converted into a byte. */
+extern void Debug2DNoise(const NOISE_DATATYPE * a_Array, int a_SizeX, int a_SizeY, const AString & a_FileNameBase, NOISE_DATATYPE a_Coeff = 32);
+
+/** Exports the noise array into a set of files, ordered by XY and XZ.
+a_Coeff specifies the value that each array value is multiplied by before being converted into a byte. */
+extern void Debug3DNoise(const NOISE_DATATYPE * a_Array, int a_SizeX, int a_SizeY, int a_SizeZ, const AString & a_FileNameBase, NOISE_DATATYPE a_Coeff = 32);
+
+
+
+
+/** Linearly interpolates between two values.
+Assumes that a_Ratio is in range [0, 1]. */
+inline NOISE_DATATYPE Lerp(NOISE_DATATYPE a_Val1, NOISE_DATATYPE a_Val2, NOISE_DATATYPE a_Ratio)
+{
+	return a_Val1 + (a_Val2 - a_Val1) * a_Ratio;
+}
+
+
+
+
+
+/** Linearly interpolates between two values, clamping the ratio to [0, 1] first. */
+inline NOISE_DATATYPE ClampedLerp(NOISE_DATATYPE a_Val1, NOISE_DATATYPE a_Val2, NOISE_DATATYPE a_Ratio)
+{
+	if (a_Ratio < 0)
+	{
+		return a_Val1;
+	}
+	if (a_Ratio > 1)
+	{
+		return a_Val2;
+	}
+	return Lerp(a_Val1, a_Val2, a_Ratio);
+}
+
+
+
+
+
 
 
 
diff --git a/src/Noise/OctavedNoise.h b/src/Noise/OctavedNoise.h
new file mode 100644
index 000000000..efb9a0167
--- /dev/null
+++ b/src/Noise/OctavedNoise.h
@@ -0,0 +1,196 @@
+
+// OctavedNoise.h
+
+// Implements the cOctavedNoise class template representing a noise generator that layers several octaves of another noise
+
+
+
+
+
+#pragma once
+
+
+
+
+
+template <typename N>
+class cOctavedNoise
+{
+public:
+	cOctavedNoise(int a_Seed = 0):
+		m_Seed(a_Seed)
+	{
+	}
+
+
+	/** Sets a new seed for the generators. Relays the seed to all underlying octaves. */
+	void SetSeed(int a_Seed)
+	{
+		m_Seed = a_Seed;
+		for (auto oct: m_Octaves)
+		{
+			oct->SetSeed(a_Seed);
+		}
+	}
+
+
+	/** Adds a new octave to the list of octaves that compose this noise. */
+	void AddOctave(NOISE_DATATYPE a_Frequency, NOISE_DATATYPE a_Amplitude)
+	{
+		m_Octaves.emplace_back(m_Seed, a_Frequency, a_Amplitude);
+	}
+
+
+	/** Fills a 2D array with the values of the noise. */
+	void Generate2D(
+		NOISE_DATATYPE * a_Array,                        ///< Array to generate into [x + a_SizeX * y]
+		int a_SizeX, int a_SizeY,                        ///< Count of the array, in each direction
+		NOISE_DATATYPE a_StartX, NOISE_DATATYPE a_EndX,  ///< Noise-space coords of the array in the X direction
+		NOISE_DATATYPE a_StartY, NOISE_DATATYPE a_EndY,  ///< Noise-space coords of the array in the Y direction
+		NOISE_DATATYPE * a_Workspace = nullptr           ///< Workspace that this function can use and trash.
+	) const
+	{
+		// Check that state is alright:
+		if (m_Octaves.empty())
+		{
+			ASSERT(!"cOctavedNoise: No octaves to generate!");
+			return;
+		}
+
+		// Allocate the workspace on the heap, if it wasn't given:
+		std::unique_ptr<NOISE_DATATYPE[]> workspaceHeap;
+		if (a_Workspace == nullptr)
+		{
+			workspaceHeap.reset(new NOISE_DATATYPE[a_SizeX * a_SizeY]);
+			a_Workspace = workspaceHeap.get();
+		}
+
+		// Generate the first octave directly into array:
+		int ArrayCount = a_SizeX * a_SizeY;
+		{
+			const cOctave & FirstOctave = m_Octaves.front();
+			FirstOctave.m_Noise.Generate2D(
+				a_Workspace, a_SizeX, a_SizeY,
+				a_StartX * FirstOctave.m_Frequency, a_EndX * FirstOctave.m_Frequency,
+				a_StartY * FirstOctave.m_Frequency, a_EndY * FirstOctave.m_Frequency
+			);
+			NOISE_DATATYPE Amplitude = FirstOctave.m_Amplitude;
+			for (int i = 0; i < ArrayCount; i++)
+			{
+				a_Array[i] = a_Workspace[i] * Amplitude;
+			}
+		}
+
+		// Add each octave:
+		for (auto itr = m_Octaves.cbegin() + 1, end = m_Octaves.cend(); itr != end; ++itr)
+		{
+			// Generate the noise for the octave:
+			itr->m_Noise.Generate2D(
+				a_Workspace, a_SizeX, a_SizeY,
+				a_StartX * itr->m_Frequency, a_EndX * itr->m_Frequency,
+				a_StartY * itr->m_Frequency, a_EndY * itr->m_Frequency
+			);
+			// Add it into the output:
+			NOISE_DATATYPE Amplitude = itr->m_Amplitude;
+			for (int i = 0; i < ArrayCount; i++)
+			{
+				a_Array[i] += a_Workspace[i] * Amplitude;
+			}
+		}  // for itr - m_Octaves[]
+	}
+
+
+	/** Fills a 3D array with the values of the noise. */
+	void Generate3D(
+		NOISE_DATATYPE * a_Array,                        ///< Array to generate into [x + a_SizeX * y + a_SizeX * a_SizeY * z]
+		int a_SizeX, int a_SizeY, int a_SizeZ,           ///< Count of the array, in each direction
+		NOISE_DATATYPE a_StartX, NOISE_DATATYPE a_EndX,  ///< Noise-space coords of the array in the X direction
+		NOISE_DATATYPE a_StartY, NOISE_DATATYPE a_EndY,  ///< Noise-space coords of the array in the Y direction
+		NOISE_DATATYPE a_StartZ, NOISE_DATATYPE a_EndZ,  ///< Noise-space coords of the array in the Z direction
+		NOISE_DATATYPE * a_Workspace = nullptr           ///< Workspace that this function can use and trash, same size as a_Array
+	) const
+	{
+		// Check that state is alright:
+		if (m_Octaves.empty())
+		{
+			ASSERT(!"cOctavedNoise: No octaves to generate!");
+			return;
+		}
+
+		// Allocate the workspace on the heap, if it wasn't given:
+		std::unique_ptr<NOISE_DATATYPE[]> workspaceHeap;
+		if (a_Workspace == nullptr)
+		{
+			workspaceHeap.reset(new NOISE_DATATYPE[a_SizeX * a_SizeY * a_SizeZ]);
+			a_Workspace = workspaceHeap.get();
+		}
+
+		// Generate the first octave directly into array:
+		int ArrayCount = a_SizeX * a_SizeY * a_SizeZ;
+		{
+			const cOctave & FirstOctave = m_Octaves.front();
+			FirstOctave.m_Noise.Generate3D(
+				a_Workspace, a_SizeX, a_SizeY, a_SizeZ,
+				a_StartX * FirstOctave.m_Frequency, a_EndX * FirstOctave.m_Frequency,
+				a_StartY * FirstOctave.m_Frequency, a_EndY * FirstOctave.m_Frequency,
+				a_StartZ * FirstOctave.m_Frequency, a_EndZ * FirstOctave.m_Frequency
+			);
+			NOISE_DATATYPE Amplitude = FirstOctave.m_Amplitude;
+			for (int i = 0; i < ArrayCount; i++)
+			{
+				a_Array[i] = a_Workspace[i] * Amplitude;
+			}
+		}
+
+		// Add each octave:
+		for (auto itr = m_Octaves.cbegin() + 1, end = m_Octaves.cend(); itr != end; ++itr)
+		{
+			// Generate the noise for the octave:
+			itr->m_Noise.Generate3D(
+				a_Workspace, a_SizeX, a_SizeY, a_SizeZ,
+				a_StartX * itr->m_Frequency, a_EndX * itr->m_Frequency,
+				a_StartY * itr->m_Frequency, a_EndY * itr->m_Frequency,
+				a_StartZ * itr->m_Frequency, a_EndZ * itr->m_Frequency
+			);
+			// Add it into the output:
+			NOISE_DATATYPE Amplitude = itr->m_Amplitude;
+			for (int i = 0; i < ArrayCount; i++)
+			{
+				a_Array[i] += a_Workspace[i] * Amplitude;
+			}
+		}  // for itr - m_Octaves[]
+	}
+
+protected:
+	/** Stores information and state for one octave of the noise. */
+	class cOctave
+	{
+	public:
+		N m_Noise;
+		
+		/** Coord multiplier. */
+		NOISE_DATATYPE m_Frequency;
+
+		/** Value multiplier. */
+		NOISE_DATATYPE m_Amplitude;
+
+		cOctave(int a_Seed, NOISE_DATATYPE a_Frequency, NOISE_DATATYPE a_Amplitude) :
+			m_Noise(a_Seed),
+			m_Frequency(a_Frequency),
+			m_Amplitude(a_Amplitude)
+		{
+		}
+	} ;
+	typedef std::vector<cOctave> cOctaves;
+
+
+	/** The seed used by the underlying generators. */
+	int m_Seed;
+
+	/** The octaves that compose this noise. */
+	cOctaves m_Octaves;
+};
+
+
+
+
diff --git a/src/Noise/RidgedNoise.h b/src/Noise/RidgedNoise.h
new file mode 100644
index 000000000..f59a0512f
--- /dev/null
+++ b/src/Noise/RidgedNoise.h
@@ -0,0 +1,91 @@
+
+// RidgedNoise.h
+
+// Implements the cRidgedNoise template class that generates ridged noise based on another noise provider.
+
+
+
+
+
+#pragma once
+
+
+
+
+
+template <typename N>
+class cRidgedNoise
+{
+public:
+	/** Creates a new instance with the seed set to 0. */
+	cRidgedNoise(void):
+		m_Noise(0)
+	{
+	}
+
+
+	/** Creates a new instance with the specified seed. */
+	cRidgedNoise(int a_Seed):
+		m_Noise(a_Seed)
+	{
+	}
+
+
+	/** Sets the seed for the underlying noise. */
+	void SetSeed(int a_Seed)
+	{
+		m_Noise.SetSeed(a_Seed);
+	}
+
+
+	/** Fills a 2D array with the values of the noise. */
+	void Generate2D(
+		NOISE_DATATYPE * a_Array,                        ///< Array to generate into [x + a_SizeX * y]
+		int a_SizeX, int a_SizeY,                        ///< Count of the array, in each direction
+		NOISE_DATATYPE a_StartX, NOISE_DATATYPE a_EndX,  ///< Noise-space coords of the array in the X direction
+		NOISE_DATATYPE a_StartY, NOISE_DATATYPE a_EndY   ///< Noise-space coords of the array in the Y direction
+	) const
+	{
+		int ArrayCount = a_SizeX * a_SizeY;
+		m_Noise.Generate2D(
+			a_Array, a_SizeX, a_SizeY,
+			a_StartX, a_EndX,
+			a_StartY, a_EndY
+		);
+		for (int i = 0; i < ArrayCount; i++)
+		{
+			a_Array[i] = std::abs(a_Array[i]);
+		}
+	}
+
+
+	/** Fills a 3D array with the values of the noise. */
+	void Generate3D(
+		NOISE_DATATYPE * a_Array,                        ///< Array to generate into [x + a_SizeX * y + a_SizeX * a_SizeY * z]
+		int a_SizeX, int a_SizeY, int a_SizeZ,           ///< Count of the array, in each direction
+		NOISE_DATATYPE a_StartX, NOISE_DATATYPE a_EndX,  ///< Noise-space coords of the array in the X direction
+		NOISE_DATATYPE a_StartY, NOISE_DATATYPE a_EndY,  ///< Noise-space coords of the array in the Y direction
+		NOISE_DATATYPE a_StartZ, NOISE_DATATYPE a_EndZ   ///< Noise-space coords of the array in the Z direction
+	) const
+	{
+		int ArrayCount = a_SizeX * a_SizeY * a_SizeZ;
+		m_Noise.Generate2D(
+			a_Array, a_SizeX, a_SizeY, a_SizeZ,
+			a_StartX, a_EndX,
+			a_StartY, a_EndY,
+			a_StartZ, a_EndZ
+		);
+		for (int i = 0; i < ArrayCount; i++)
+		{
+			a_Array[i] = std::abs(a_Array[i]);
+		}
+	}
+
+protected:
+	N m_Noise;
+} ;
+
+
+
+
+
diff --git a/src/OSSupport/CMakeLists.txt b/src/OSSupport/CMakeLists.txt
index c3eabeef6..e943ceb18 100644
--- a/src/OSSupport/CMakeLists.txt
+++ b/src/OSSupport/CMakeLists.txt
@@ -13,11 +13,10 @@ SET (SRCS
 	IsThread.cpp
 	ListenThread.cpp
 	Semaphore.cpp
-	Sleep.cpp
 	Socket.cpp
 	SocketThreads.cpp
-	Thread.cpp
-	Timer.cpp)
+	StackTrace.cpp
+)
 
 SET (HDRS
 	CriticalSection.h
@@ -29,11 +28,10 @@ SET (HDRS
 	ListenThread.h
 	Queue.h
 	Semaphore.h
-	Sleep.h
 	Socket.h
 	SocketThreads.h
-	Thread.h
-	Timer.h)
+	StackTrace.h
+)
 
 if(NOT MSVC)
 	add_library(OSSupport ${SRCS} ${HDRS})
diff --git a/src/OSSupport/CriticalSection.cpp b/src/OSSupport/CriticalSection.cpp
index 5dfc8b5f9..13a3e4d9f 100644
--- a/src/OSSupport/CriticalSection.cpp
+++ b/src/OSSupport/CriticalSection.cpp
@@ -1,6 +1,5 @@
 
 #include "Globals.h"  // NOTE: MSVC stupidness requires this to be the same across all modules
-#include "IsThread.h"
 
 
 
@@ -9,41 +8,12 @@
 ////////////////////////////////////////////////////////////////////////////////
 // cCriticalSection:
 
+#ifdef _DEBUG
 cCriticalSection::cCriticalSection()
 {
-	#ifdef _WIN32
-		InitializeCriticalSection(&m_CriticalSection);
-	#else
-		pthread_mutexattr_init(&m_Attributes);
-		pthread_mutexattr_settype(&m_Attributes, PTHREAD_MUTEX_RECURSIVE);
-
-		if (pthread_mutex_init(&m_CriticalSection, &m_Attributes) != 0)
-		{
-			LOGERROR("Could not initialize Critical Section!");
-		}
-	#endif
-	
-	#ifdef _DEBUG
-		m_IsLocked = 0;
-	#endif  // _DEBUG
-}
-
-
-
-
-
-cCriticalSection::~cCriticalSection()
-{
-	#ifdef _WIN32
-		DeleteCriticalSection(&m_CriticalSection);
-	#else
-		if (pthread_mutex_destroy(&m_CriticalSection) != 0)
-		{
-			LOGWARNING("Could not destroy Critical Section!");
-		}
-		pthread_mutexattr_destroy(&m_Attributes);
-	#endif
+	m_IsLocked = 0;
 }
+#endif  // _DEBUG
 
 
 
@@ -51,15 +21,11 @@ cCriticalSection::~cCriticalSection()
 
 void cCriticalSection::Lock()
 {
-	#ifdef _WIN32
-		EnterCriticalSection(&m_CriticalSection);
-	#else
-		pthread_mutex_lock(&m_CriticalSection);
-	#endif
+	m_Mutex.lock();
 	
 	#ifdef _DEBUG
 		m_IsLocked += 1;
-		m_OwningThreadID = cIsThread::GetCurrentID();
+		m_OwningThreadID = std::this_thread::get_id();
 	#endif  // _DEBUG
 }
 
@@ -74,11 +40,7 @@ void cCriticalSection::Unlock()
 		m_IsLocked -= 1;
 	#endif  // _DEBUG
 	
-	#ifdef _WIN32
-		LeaveCriticalSection(&m_CriticalSection);
-	#else
-		pthread_mutex_unlock(&m_CriticalSection);
-	#endif
+	m_Mutex.unlock();
 }
 
 
@@ -97,7 +59,7 @@ bool cCriticalSection::IsLocked(void)
 
 bool cCriticalSection::IsLockedByCurrentThread(void)
 {
-	return ((m_IsLocked > 0) && (m_OwningThreadID == cIsThread::GetCurrentID()));
+	return ((m_IsLocked > 0) && (m_OwningThreadID == std::this_thread::get_id()));
 }
 #endif  // _DEBUG
 
diff --git a/src/OSSupport/CriticalSection.h b/src/OSSupport/CriticalSection.h
index c3c6e57f0..17fcdfc12 100644
--- a/src/OSSupport/CriticalSection.h
+++ b/src/OSSupport/CriticalSection.h
@@ -1,5 +1,7 @@
 
 #pragma once
+#include <mutex>
+#include <thread>
 
 
 
@@ -8,8 +10,6 @@
 class cCriticalSection
 {
 public:
-	cCriticalSection(void);
-	~cCriticalSection();
 
 	void Lock(void);
 	void Unlock(void);
@@ -17,6 +17,7 @@ public:
 	// IsLocked/IsLockedByCurrentThread are only used in ASSERT statements, but because of the changes with ASSERT they must always be defined
 	// The fake versions (in Release) will not effect the program in any way
 	#ifdef _DEBUG
+	cCriticalSection(void);
 	bool IsLocked(void);
 	bool IsLockedByCurrentThread(void);
 	#else
@@ -27,15 +28,10 @@ public:
 private:
 	#ifdef _DEBUG
 	int           m_IsLocked;  // Number of times this CS is locked
-	unsigned long m_OwningThreadID;
+	std::thread::id m_OwningThreadID;
 	#endif  // _DEBUG
 	
-	#ifdef _WIN32
-		CRITICAL_SECTION m_CriticalSection;
-	#else  // _WIN32
-		pthread_mutex_t     m_CriticalSection;
-		pthread_mutexattr_t m_Attributes;
-	#endif  // else _WIN32
+	std::recursive_mutex m_Mutex;
 } ALIGN_8;
 
 
diff --git a/src/OSSupport/Event.cpp b/src/OSSupport/Event.cpp
index 87bc110ce..760e536a1 100644
--- a/src/OSSupport/Event.cpp
+++ b/src/OSSupport/Event.cpp
@@ -12,137 +12,59 @@
 
 
 
-cEvent::cEvent(void)
+cEvent::cEvent(void) :
+	m_ShouldWait(true)
 {
-#ifdef _WIN32
-	m_Event = CreateEvent(nullptr, FALSE, FALSE, nullptr);
-	if (m_Event == nullptr)
-	{
-		LOGERROR("cEvent: cannot create event, GLE = %u. Aborting server.", (unsigned)GetLastError());
-		abort();
-	}
-#else  // *nix
-	m_bIsNamed = false;
-	m_Event = new sem_t;
-	if (sem_init(m_Event, 0, 0))
-	{
-		// This path is used by MacOS, because it doesn't support unnamed semaphores.
-		delete m_Event;
-		m_bIsNamed = true;
-
-		AString EventName;
-		Printf(EventName, "cEvent%p", this);
-		m_Event = sem_open(EventName.c_str(), O_CREAT, 777, 0);
-		if (m_Event == SEM_FAILED)
-		{
-			AString error = GetOSErrorString(errno);
-			LOGERROR("cEvent: Cannot create event, err = %s. Aborting server.", error.c_str());
-			abort();
-		}
-		// Unlink the semaphore immediately - it will continue to function but will not pollute the namespace
-		// We don't store the name, so can't call this in the destructor
-		if (sem_unlink(EventName.c_str()) != 0)
-		{
-			AString error = GetOSErrorString(errno);
-			LOGWARN("ERROR: Could not unlink cEvent. (%s)", error.c_str());
-		}
-	}
-#endif  // *nix
 }
 
 
 
 
 
-cEvent::~cEvent()
+void cEvent::Wait(void)
 {
-#ifdef _WIN32
-	CloseHandle(m_Event);
-#else
-	if (m_bIsNamed)
-	{
-		if (sem_close(m_Event) != 0)
-		{
-			AString error = GetOSErrorString(errno);
-			LOGERROR("ERROR: Could not close cEvent. (%s)", error.c_str());
-		}
-	}
-	else
+	std::unique_lock<std::mutex> Lock(m_Mutex);
+	while (m_ShouldWait)
 	{
-		sem_destroy(m_Event);
-		delete m_Event;
-		m_Event = nullptr;
+		m_CondVar.wait(Lock);
 	}
-#endif
+	m_ShouldWait = true;
 }
 
 
 
 
 
-void cEvent::Wait(void)
+bool cEvent::Wait(unsigned a_TimeoutMSec)
 {
-	#ifdef _WIN32
-		DWORD res = WaitForSingleObject(m_Event, INFINITE);
-		if (res != WAIT_OBJECT_0)
-		{
-			LOGWARN("cEvent: waiting for the event failed: %u, GLE = %u. Continuing, but server may be unstable.", (unsigned)res, (unsigned)GetLastError());
-		}
-	#else
-		int res = sem_wait(m_Event);
-		if (res != 0)
-		{
-			AString error = GetOSErrorString(errno);
-			LOGWARN("cEvent: waiting for the event failed: %i, err = %s. Continuing, but server may be unstable.", res, error.c_str());
-		}
-	#endif
-}
-
-
-
-
-
-bool cEvent::Wait(int a_TimeoutMSec)
-{
-	#ifdef _WIN32
-		DWORD res = WaitForSingleObject(m_Event, (DWORD)a_TimeoutMSec);
-		switch (res)
+	auto dst = std::chrono::system_clock::now() + std::chrono::milliseconds(a_TimeoutMSec);
+	std::unique_lock<std::mutex> Lock(m_Mutex);  // We assume that this lock is acquired without much delay - we are the only user of the mutex
+	while (m_ShouldWait && (std::chrono::system_clock::now() <= dst))
+	{
+		switch (m_CondVar.wait_until(Lock, dst))
 		{
-			case WAIT_OBJECT_0: return true;   // Regular event signalled
-			case WAIT_TIMEOUT:  return false;  // Regular event timeout
-			default:
+			case std::cv_status::no_timeout:
 			{
-				LOGWARN("cEvent: waiting for the event failed: %u, GLE = %u. Continuing, but server may be unstable.", (unsigned)res, (unsigned)GetLastError());
-				return false;
+				// The wait was successful, check for spurious wakeup:
+				if (!m_ShouldWait)
+				{
+					m_ShouldWait = true;
+					return true;
+				}
+				// This was a spurious wakeup, wait again:
+				continue;
 			}
-		}
-	#else
-		// Get the current time:
-		timespec timeout;
-		if (clock_gettime(CLOCK_REALTIME, &timeout) == -1)
-		{
-			LOGWARN("cEvent: Getting current time failed: %i, err = %s. Continuing, but the server may be unstable.", errno, GetOSErrorString(errno).c_str());
-			return false;
-		}
-
-		// Add the specified timeout:
-		timeout.tv_sec += a_TimeoutMSec / 1000;
-		timeout.tv_nsec += (a_TimeoutMSec % 1000) * 1000000;  // 1 msec = 1000000 usec
-
-		// Wait with timeout:
-		int res = sem_timedwait(m_Event, &timeout);
-		switch (res)
-		{
-			case 0:         return true;   // Regular event signalled
-			case ETIMEDOUT: return false;  // Regular even timeout
-			default:
+			
+			case std::cv_status::timeout:
 			{
-				AString error = GetOSErrorString(errno);
-				LOGWARN("cEvent: waiting for the event failed: %i, err = %s. Continuing, but server may be unstable.", res, error.c_str());
+				// The wait timed out, return failure:
 				return false;
 			}
-		}
-	#endif
+		}  // switch (wait_until())
+	}  // while (m_ShouldWait && not timeout)
+
+	// The wait timed out in the while condition:
+	return false;
 }
 
 
@@ -151,19 +73,11 @@ bool cEvent::Wait(int a_TimeoutMSec)
 
 void cEvent::Set(void)
 {
-	#ifdef _WIN32
-		if (!SetEvent(m_Event))
-		{
-			LOGWARN("cEvent: Could not set cEvent: GLE = %u", (unsigned)GetLastError());
-		}
-	#else
-		int res = sem_post(m_Event);
-		if (res != 0)
-		{
-			AString error = GetOSErrorString(errno);
-			LOGWARN("cEvent: Could not set cEvent: %i, err = %s", res, error.c_str());
-		}
-	#endif
+	{
+		std::unique_lock<std::mutex> Lock(m_Mutex);
+		m_ShouldWait = false;
+	}
+	m_CondVar.notify_one();
 }
 
 
diff --git a/src/OSSupport/Event.h b/src/OSSupport/Event.h
index e2fa65a05..572388a3f 100644
--- a/src/OSSupport/Event.h
+++ b/src/OSSupport/Event.h
@@ -1,16 +1,17 @@
 
 // Event.h
 
-// Interfaces to the cEvent object representing an OS-specific synchronization primitive that can be waited-for
-// Implemented as an Event on Win and as a 1-semaphore on *nix
+// Interfaces to the cEvent object representing a synchronization primitive that can be waited-for
+// Implemented using C++11 condition variable and mutex
 
 
 
 
 
 #pragma once
-#ifndef CEVENT_H_INCLUDED
-#define CEVENT_H_INCLUDED
+
+#include <mutex>
+#include <condition_variable>
 
 
 
@@ -20,31 +21,31 @@ class cEvent
 {
 public:
 	cEvent(void);
-	~cEvent();
 
+	/** Waits until the event has been set.
+	If the event has been set before it has been waited for, Wait() returns immediately. */
 	void Wait(void);
+
+	/** Sets the event - releases one thread that has been waiting in Wait().
+	If there was no thread waiting, the next call to Wait() will not block. */
 	void Set (void);
 
 	/** Waits for the event until either it is signalled, or the (relative) timeout is passed.
 	Returns true if the event was signalled, false if the timeout was hit or there was an error. */
-	bool Wait(int a_TimeoutMSec);
+	bool Wait(unsigned a_TimeoutMSec);
 	
 private:
 
-	#ifdef _WIN32
-	HANDLE m_Event;
-	#else
-	sem_t * m_Event;
-	bool    m_bIsNamed;
-	#endif
-} ;
-
-
-
+	/** Used for checking for spurious wakeups. */
+	bool m_ShouldWait;
 
+	/** Mutex protecting m_ShouldWait from multithreaded access. */
+	std::mutex m_Mutex;
 
+	/** The condition variable used as the Event. */
+	std::condition_variable m_CondVar;
+} ;
 
-#endif  // CEVENT_H_INCLUDED
 
 
 
diff --git a/src/OSSupport/IsThread.cpp b/src/OSSupport/IsThread.cpp
index 1a436623a..94bed1f56 100644
--- a/src/OSSupport/IsThread.cpp
+++ b/src/OSSupport/IsThread.cpp
@@ -5,49 +5,40 @@
 // This class will eventually suupersede the old cThread class
 
 #include "Globals.h"
-
 #include "IsThread.h"
 
 
 
 
 
-// When in MSVC, the debugger provides "thread naming" by catching special exceptions. Interface here:
 #if defined(_MSC_VER) && defined(_DEBUG)
-//
-// Usage: SetThreadName (-1, "MainThread");
-//
-
-// Code adapted from MSDN: http://msdn.microsoft.com/en-us/library/xcb2z8hs.aspx
-
-const DWORD MS_VC_EXCEPTION = 0x406D1388;
-
-#pragma pack(push, 8)
-typedef struct tagTHREADNAME_INFO
-{
-	DWORD  dwType;      // Must be 0x1000.
-	LPCSTR szName;      // Pointer to name (in user addr space).
-	DWORD  dwThreadID;  // Thread ID (-1 = caller thread).
-	DWORD  dwFlags;     // Reserved for future use, must be zero.
-} THREADNAME_INFO;
-#pragma pack(pop)
-
-static void SetThreadName(DWORD dwThreadID, const char * threadName)
-{
-	THREADNAME_INFO info;
-	info.dwType = 0x1000;
-	info.szName = threadName;
-	info.dwThreadID = dwThreadID;
-	info.dwFlags = 0;
+	// Code adapted from MSDN: http://msdn.microsoft.com/en-us/library/xcb2z8hs.aspx
 
-	__try
-	{
-		RaiseException(MS_VC_EXCEPTION, 0, sizeof(info) / sizeof(ULONG_PTR), (ULONG_PTR *)&info);
-	}
-	__except (EXCEPTION_EXECUTE_HANDLER)
+	const DWORD MS_VC_EXCEPTION = 0x406D1388;
+	#pragma pack(push, 8)
+		struct THREADNAME_INFO
+		{
+			DWORD  dwType;      // Must be 0x1000.
+			LPCSTR szName;      // Pointer to name (in user addr space).
+			DWORD  dwThreadID;  // Thread ID (-1 = caller thread).
+			DWORD  dwFlags;     // Reserved for future use, must be zero.
+		};
+	#pragma pack(pop)
+
+	/** Sets the name of a thread with the specified ID
+	(When in MSVC, the debugger provides "thread naming" by catching special exceptions)
+	*/
+	static void SetThreadName(std::thread * a_Thread, const char * a_ThreadName)
 	{
+		THREADNAME_INFO info { 0x1000, a_ThreadName, GetThreadId(a_Thread->native_handle()), 0 };
+		__try
+		{
+			RaiseException(MS_VC_EXCEPTION, 0, sizeof(info) / sizeof(ULONG_PTR), (ULONG_PTR *)&info);
+		}
+		__except (EXCEPTION_EXECUTE_HANDLER)
+		{
+		}
 	}
-}
 #endif  // _MSC_VER && _DEBUG
 
 
@@ -57,13 +48,9 @@ static void SetThreadName(DWORD dwThreadID, const char * threadName)
 ////////////////////////////////////////////////////////////////////////////////
 // cIsThread:
 
-cIsThread::cIsThread(const AString & iThreadName) :
+cIsThread::cIsThread(const AString & a_ThreadName) :
 	m_ShouldTerminate(false),
-	m_ThreadName(iThreadName),
-	#ifdef _WIN32
-		m_ThreadID(0),
-	#endif
-	m_Handle(NULL_HANDLE)
+	m_ThreadName(a_ThreadName)
 {
 }
 
@@ -83,35 +70,24 @@ cIsThread::~cIsThread()
 
 bool cIsThread::Start(void)
 {
-	ASSERT(m_Handle == NULL_HANDLE);  // Has already started one thread?
-	#ifdef _WIN32
-		// Create the thread suspended, so that the mHandle variable is valid in the thread procedure
-		m_ThreadID = 0;
-		m_Handle = CreateThread(NULL, 0, thrExecute, this, CREATE_SUSPENDED, &m_ThreadID);
-		if (m_Handle == NULL)
-		{
-			LOGERROR("ERROR: Could not create thread \"%s\", GLE = %u!", m_ThreadName.c_str(), (unsigned)GetLastError());
-			return false;
-		}
-		ResumeThread(m_Handle);
-
-		#if defined(_DEBUG) && defined(_MSC_VER)
-			// Thread naming is available only in MSVC
-			if (!m_ThreadName.empty())
-			{
-				SetThreadName(m_ThreadID, m_ThreadName.c_str());
-			}
-		#endif  // _DEBUG and _MSC_VER
-		
-	#else  // _WIN32
-		if (pthread_create(&m_Handle, NULL, thrExecute, this))
+	try
+	{
+		m_Thread = std::thread(&cIsThread::Execute, this);
+
+		#if defined (_MSC_VER) && defined(_DEBUG)
+		if (!m_ThreadName.empty())
 		{
-			LOGERROR("ERROR: Could not create thread \"%s\", !", m_ThreadName.c_str());
-			return false;
+			SetThreadName(&m_Thread, m_ThreadName.c_str());
 		}
-	#endif  // else _WIN32
+		#endif
 
-	return true;
+		return true;
+	}
+	catch (std::system_error & a_Exception)
+	{
+		LOGERROR("cIsThread::Start error %i: could not construct thread %s; %s", a_Exception.code().value(), m_ThreadName.c_str(), a_Exception.code().message().c_str());
+		return false;
+	}
 }
 
 
@@ -120,10 +96,12 @@ bool cIsThread::Start(void)
 
 void cIsThread::Stop(void)
 {
-	if (m_Handle == NULL_HANDLE)
+	if (!m_Thread.joinable())
 	{
+		// The thread hasn't been started or has already been joined
 		return;
 	}
+
 	m_ShouldTerminate = true;
 	Wait();
 }
@@ -134,59 +112,23 @@ void cIsThread::Stop(void)
 
 bool cIsThread::Wait(void)
 {
-	if (m_Handle == NULL_HANDLE)
+	LOGD("Waiting for thread %s to finish", m_ThreadName.c_str());
+	if (m_Thread.joinable())
 	{
-		return true;
+		try
+		{
+			m_Thread.join();
+			return true;
+		}
+		catch (std::system_error & a_Exception)
+		{
+			LOGERROR("cIsThread::Wait error %i: could not join thread %s; %s", a_Exception.code().value(), m_ThreadName.c_str(), a_Exception.code().message().c_str());
+			return false;
+		}
 	}
-	
-	#ifdef LOGD  // ProtoProxy doesn't have LOGD
-		LOGD("Waiting for thread %s to finish", m_ThreadName.c_str());
-	#endif  // LOGD
-	
-	#ifdef _WIN32
-		int res = WaitForSingleObject(m_Handle, INFINITE);
-		m_Handle = NULL;
-		
-		#ifdef LOGD  // ProtoProxy doesn't have LOGD
-			LOGD("Thread %s finished", m_ThreadName.c_str());
-		#endif  // LOGD
-		
-		return (res == WAIT_OBJECT_0);
-	#else  // _WIN32
-		int res = pthread_join(m_Handle, NULL);
-		m_Handle = NULL_HANDLE;
-		
-		#ifdef LOGD  // ProtoProxy doesn't have LOGD
-			LOGD("Thread %s finished", m_ThreadName.c_str());
-		#endif  // LOGD
-		
-		return (res == 0);
-	#endif  // else _WIN32
-}
-
 
-
-
-
-unsigned long cIsThread::GetCurrentID(void)
-{
-	#ifdef _WIN32
-		return (unsigned long) GetCurrentThreadId();
-	#else
-		return (unsigned long) pthread_self();
-	#endif
-}
-
-
-
-
-bool cIsThread::IsCurrentThread(void) const
-{
-	#ifdef _WIN32
-		return (GetCurrentThreadId() == m_ThreadID);
-	#else
-		return (m_Handle == pthread_self());
-	#endif
+	LOGD("Thread %s finished", m_ThreadName.c_str());
+	return true;
 }
 
 
diff --git a/src/OSSupport/IsThread.h b/src/OSSupport/IsThread.h
index 5c8d28d2d..131c6950e 100644
--- a/src/OSSupport/IsThread.h
+++ b/src/OSSupport/IsThread.h
@@ -16,8 +16,7 @@ In the descending class' constructor call the Start() method to start the thread
 
 
 #pragma once
-#ifndef CISTHREAD_H_INCLUDED
-#define CISTHREAD_H_INCLUDED
+#include <thread>
 
 
 
@@ -33,7 +32,7 @@ protected:
 	volatile bool m_ShouldTerminate;
 
 public:
-	cIsThread(const AString & iThreadName);
+	cIsThread(const AString & a_ThreadName);
 	virtual ~cIsThread();
 
 	/// Starts the thread; returns without waiting for the actual start
@@ -45,56 +44,14 @@ public:
 	/// Waits for the thread to finish. Doesn't signalize the ShouldTerminate flag
 	bool Wait(void);
 
-	/// Returns the OS-dependent thread ID for the caller's thread
-	static unsigned long GetCurrentID(void);
-
 	/** Returns true if the thread calling this function is the thread contained within this object. */
-	bool IsCurrentThread(void) const;
+	bool IsCurrentThread(void) const { return std::this_thread::get_id() == m_Thread.get_id(); }
 
 protected:
 	AString m_ThreadName;
-
-	// Value used for "no handle":
-	#ifdef _WIN32
-		#define NULL_HANDLE NULL
-	#else
-		#define NULL_HANDLE 0
-	#endif
-
-	#ifdef _WIN32
-
-		DWORD m_ThreadID;
-		HANDLE m_Handle;
-
-		static DWORD __stdcall thrExecute(LPVOID a_Param)
-		{
-			// Create a window so that the thread can be identified by 3rd party tools:
-			HWND IdentificationWnd = CreateWindowA("STATIC", ((cIsThread *)a_Param)->m_ThreadName.c_str(), 0, 0, 0, 0, WS_OVERLAPPED, NULL, NULL, NULL, NULL);
-
-			// Run the thread:
-			((cIsThread *)a_Param)->Execute();
-
-			// Destroy the identification window:
-			DestroyWindow(IdentificationWnd);
-
-			return 0;
-		}
-
-	#else  // _WIN32
-
-		pthread_t m_Handle;
-
-		static void * thrExecute(void * a_Param)
-		{
-			(static_cast<cIsThread *>(a_Param))->Execute();
-			return NULL;
-		}
-
-	#endif  // else _WIN32
+	std::thread m_Thread;
 } ;
 
 
 
 
-
-#endif  // CISTHREAD_H_INCLUDED
diff --git a/src/OSSupport/Queue.h b/src/OSSupport/Queue.h
index 8d096fe29..82f221453 100644
--- a/src/OSSupport/Queue.h
+++ b/src/OSSupport/Queue.h
@@ -163,6 +163,29 @@ public:
 		return false;
 	}
 
+
+	/** Removes all items for which the predicate returns true. */
+	template <class Predicate>
+	void RemoveIf(Predicate a_Predicate)
+	{
+		cCSLock Lock(m_CS);
+		for (auto itr = m_Contents.begin(); itr != m_Contents.end();)
+		{
+			if (a_Predicate(*itr))
+			{
+				auto itr2 = itr;
+				++itr2;
+				m_Contents.erase(itr);
+				m_evtRemoved.Set();
+				itr = itr2;
+			}
+			else
+			{
+				++itr;
+			}
+		}  // for itr - m_Contents[]
+	}
+
 private:
 	/// The contents of the queue
 	QueueType m_Contents;
diff --git a/src/OSSupport/Sleep.cpp b/src/OSSupport/Sleep.cpp
deleted file mode 100644
index 297d668d7..000000000
--- a/src/OSSupport/Sleep.cpp
+++ /dev/null
@@ -1,19 +0,0 @@
-
-#include "Globals.h"  // NOTE: MSVC stupidness requires this to be the same across all modules
-
-#ifndef _WIN32
-	#include <unistd.h>
-#endif
-
-
-
-
-
-void cSleep::MilliSleep( unsigned int a_MilliSeconds)
-{
-#ifdef _WIN32
-	Sleep(a_MilliSeconds);  // Don't tick too much
-#else
-	usleep(a_MilliSeconds*1000);
-#endif
-}
diff --git a/src/OSSupport/Sleep.h b/src/OSSupport/Sleep.h
deleted file mode 100644
index 57d29682c..000000000
--- a/src/OSSupport/Sleep.h
+++ /dev/null
@@ -1,7 +0,0 @@
-#pragma once
-
-class cSleep
-{
-public:
-	static void MilliSleep( unsigned int a_MilliSeconds);
-};
diff --git a/src/OSSupport/Socket.h b/src/OSSupport/Socket.h
index e4ec895cb..9ec8c1111 100644
--- a/src/OSSupport/Socket.h
+++ b/src/OSSupport/Socket.h
@@ -74,7 +74,7 @@ public:
 	inline static bool IsSocketError(int a_ReturnedValue)
 	{
 		#ifdef _WIN32
-			return (a_ReturnedValue == SOCKET_ERROR || a_ReturnedValue == 0);
+			return ((a_ReturnedValue == SOCKET_ERROR) || (a_ReturnedValue == 0));
 		#else
 			return (a_ReturnedValue <= 0);
 		#endif
diff --git a/src/OSSupport/SocketThreads.cpp b/src/OSSupport/SocketThreads.cpp
index 7a3ef4274..153d6ed1d 100644
--- a/src/OSSupport/SocketThreads.cpp
+++ b/src/OSSupport/SocketThreads.cpp
@@ -86,7 +86,8 @@ void cSocketThreads::RemoveClient(const cCallback * a_Client)
 		}
 	}  // for itr - m_Threads[]
 
-	ASSERT(!"Removing an unknown client");
+	// This client wasn't found.
+	// It's not an error, because it may have been removed by a different thread in the meantime.
 }
 
 
@@ -491,10 +492,17 @@ void cSocketThreads::cSocketThread::ReadFromSockets(fd_set * a_Read)
 				{
 					case sSlot::ssNormal:
 					{
-						// Notify the callback that the remote has closed the socket; keep the slot
-						m_Slots[i].m_Client->SocketClosed();
+						// Close the socket on our side:
 						m_Slots[i].m_State = sSlot::ssRemoteClosed;
 						m_Slots[i].m_Socket.CloseSocket();
+
+						// Notify the callback that the remote has closed the socket, *after* removing the socket:
+						cCallback * client = m_Slots[i].m_Client;
+						m_Slots[i] = m_Slots[--m_NumSlots];
+						if (client != nullptr)
+						{
+							client->SocketClosed();
+						}
 						break;
 					}
 					case sSlot::ssWritingRestOut:
diff --git a/src/OSSupport/StackTrace.cpp b/src/OSSupport/StackTrace.cpp
new file mode 100644
index 000000000..a56568457
--- /dev/null
+++ b/src/OSSupport/StackTrace.cpp
@@ -0,0 +1,44 @@
+
+// StackTrace.cpp
+
+// Implements the functions to print current stack traces
+
+#include "Globals.h"
+#include "StackTrace.h"
+#ifdef _WIN32
+	#include "../StackWalker.h"
+#else
+	#include <execinfo.h>
+	#include <unistd.h>
+#endif
+
+
+
+
+
+void PrintStackTrace(void)
+{
+	#ifdef _WIN32
+		// Reuse the StackWalker from the LeakFinder project already bound to MCS
+		// Define a subclass of the StackWalker that outputs everything to stdout
+		class PrintingStackWalker :
+			public StackWalker
+		{
+			virtual void OnOutput(LPCSTR szText) override
+			{
+				puts(szText);
+			}
+		} sw;
+		sw.ShowCallstack();
+	#else
+		// Use the backtrace() function to get and output the stackTrace:
+		// Code adapted from http://stackoverflow.com/questions/77005/how-to-generate-a-stacktrace-when-my-gcc-c-app-crashes
+		void * stackTrace[30];
+		size_t numItems = backtrace(stackTrace, ARRAYCOUNT(stackTrace));
+		backtrace_symbols_fd(stackTrace, numItems, STDERR_FILENO);
+	#endif
+}
+
+
+
+
diff --git a/src/OSSupport/StackTrace.h b/src/OSSupport/StackTrace.h
new file mode 100644
index 000000000..228a00077
--- /dev/null
+++ b/src/OSSupport/StackTrace.h
@@ -0,0 +1,15 @@
+
+// StackTrace.h
+
+// Declares the functions to print current stack trace
+
+
+
+
+
+/** Prints the stacktrace for the current thread. */
+extern void PrintStackTrace(void);
+
+
+
+
diff --git a/src/OSSupport/Thread.cpp b/src/OSSupport/Thread.cpp
deleted file mode 100644
index faaccce96..000000000
--- a/src/OSSupport/Thread.cpp
+++ /dev/null
@@ -1,137 +0,0 @@
-
-#include "Globals.h"  // NOTE: MSVC stupidness requires this to be the same across all modules
-
-
-
-
-
-// When in MSVC, the debugger provides "thread naming" by catching special exceptions. Interface here:
-#ifdef _MSC_VER
-//
-// Usage: SetThreadName (-1, "MainThread");
-//
-
-// Code adapted from MSDN: http://msdn.microsoft.com/en-us/library/xcb2z8hs.aspx
-
-const DWORD MS_VC_EXCEPTION = 0x406D1388;
-
-#pragma pack(push, 8)
-typedef struct tagTHREADNAME_INFO
-{
-	DWORD  dwType;      // Must be 0x1000.
-	LPCSTR szName;      // Pointer to name (in user addr space).
-	DWORD  dwThreadID;  // Thread ID (-1 = caller thread).
-	DWORD  dwFlags;     // Reserved for future use, must be zero.
-} THREADNAME_INFO;
-#pragma pack(pop)
-
-static void SetThreadName(DWORD dwThreadID, const char * threadName)
-{
-	THREADNAME_INFO info;
-	info.dwType = 0x1000;
-	info.szName = threadName;
-	info.dwThreadID = dwThreadID;
-	info.dwFlags = 0;
-
-	__try
-	{
-		RaiseException(MS_VC_EXCEPTION, 0, sizeof(info) / sizeof(ULONG_PTR), (ULONG_PTR *)&info);
-	}
-	__except (EXCEPTION_EXECUTE_HANDLER)
-	{
-	}
-}
-#endif  // _MSC_VER
-
-
-
-
-
-cThread::cThread( ThreadFunc a_ThreadFunction, void* a_Param, const char* a_ThreadName /* = 0 */)
-	: m_ThreadFunction( a_ThreadFunction)
-	, m_Param( a_Param)
-	, m_Event( new cEvent())
-	, m_StopEvent( 0)
-{
-	if (a_ThreadName)
-	{
-		m_ThreadName.assign(a_ThreadName);
-	}
-}
-
-
-
-
-
-cThread::~cThread()
-{
-	delete m_Event;
-	m_Event = NULL;
-	
-	if (m_StopEvent)
-	{
-		m_StopEvent->Wait();
-		delete m_StopEvent;
-		m_StopEvent = NULL;
-	}
-}
-
-
-
-
-
-void cThread::Start( bool a_bWaitOnDelete /* = true */)
-{
-	if (a_bWaitOnDelete)
-		m_StopEvent = new cEvent();
-
-#ifndef _WIN32
-	pthread_t SndThread;
-	if (pthread_create( &SndThread, NULL, MyThread, this))
-		LOGERROR("ERROR: Could not create thread!");
-#else
-	DWORD ThreadID = 0;
-	HANDLE hThread = CreateThread(NULL  // security
-		, 0  // stack size
-		, (LPTHREAD_START_ROUTINE) MyThread  // function name
-		, this  // parameters
-		, 0  // flags
-		, &ThreadID);  // thread id
-	CloseHandle( hThread);
-
-	#ifdef _MSC_VER
-	if (!m_ThreadName.empty())
-	{
-		SetThreadName(ThreadID, m_ThreadName.c_str());
-	}
-	#endif  // _MSC_VER
-#endif
-
-	// Wait until thread has actually been created
-	m_Event->Wait();
-}
-
-
-
-
-
-#ifdef _WIN32
-unsigned long cThread::MyThread(void* a_Param)
-#else
-void *cThread::MyThread( void *a_Param)
-#endif
-{
-	cThread* self = (cThread*)a_Param;
-	cEvent* StopEvent = self->m_StopEvent;
-
-	ThreadFunc* ThreadFunction = self->m_ThreadFunction;
-	void* ThreadParam = self->m_Param;
-
-	// Set event to let other thread know this thread has been created and it's safe to delete the cThread object
-	self->m_Event->Set();
-
-	ThreadFunction( ThreadParam);
-
-	if (StopEvent) StopEvent->Set();
-	return 0;
-}
diff --git a/src/OSSupport/Thread.h b/src/OSSupport/Thread.h
deleted file mode 100644
index 7ee352c82..000000000
--- a/src/OSSupport/Thread.h
+++ /dev/null
@@ -1,26 +0,0 @@
-#pragma once
-
-class cThread
-{
-public:
-	typedef void (ThreadFunc)(void*);
-	cThread( ThreadFunc a_ThreadFunction, void* a_Param, const char* a_ThreadName = 0);
-	~cThread();
-
-	void Start( bool a_bWaitOnDelete = true);
-	void WaitForThread();
-private:
-	ThreadFunc* m_ThreadFunction;
-
-#ifdef _WIN32
-	static unsigned long MyThread(void* a_Param);
-#else
-	static void *MyThread( void *lpParam);
-#endif
-
-	void* m_Param;
-	cEvent* m_Event;
-	cEvent* m_StopEvent;
-
-	AString m_ThreadName;
-};
diff --git a/src/OSSupport/Timer.cpp b/src/OSSupport/Timer.cpp
deleted file mode 100644
index fd838dd0d..000000000
--- a/src/OSSupport/Timer.cpp
+++ /dev/null
@@ -1,37 +0,0 @@
-
-#include "Globals.h"  // NOTE: MSVC stupidness requires this to be the same across all modules
-
-#include "Timer.h"
-
-
-
-
-
-
-cTimer::cTimer(void)
-{
-	#ifdef _WIN32
-		QueryPerformanceFrequency(&m_TicksPerSecond);
-	#endif
-}
-
-
-
-
-
-long long cTimer::GetNowTime(void)
-{
-	#ifdef _WIN32
-		LARGE_INTEGER now;
-		QueryPerformanceCounter(&now);
-		return ((now.QuadPart * 1000) / m_TicksPerSecond.QuadPart);
-	#else
-		struct timeval  now;
-		gettimeofday(&now, NULL);
-		return (long long)now.tv_sec * 1000 + (long long)now.tv_usec / 1000;
-	#endif
-}
-
-
-
-
diff --git a/src/OSSupport/Timer.h b/src/OSSupport/Timer.h
deleted file mode 100644
index a059daa41..000000000
--- a/src/OSSupport/Timer.h
+++ /dev/null
@@ -1,32 +0,0 @@
-
-// Timer.h
-
-// Declares the cTimer class representing an OS-independent of retrieving current time with msec accuracy
-
-
-
-
-
-#pragma once
-
-
-
-
-
-class cTimer
-{
-public:
-	cTimer(void);
-
-	// Returns the current time expressed in milliseconds
-	long long GetNowTime(void);
-private:
-
-	#ifdef _WIN32
-		LARGE_INTEGER m_TicksPerSecond;
-	#endif
-} ;
-
-
-
-
diff --git a/src/ProbabDistrib.cpp b/src/ProbabDistrib.cpp
index 7a5869dcc..c34c75982 100644
--- a/src/ProbabDistrib.cpp
+++ b/src/ProbabDistrib.cpp
@@ -5,7 +5,7 @@
 
 #include "Globals.h"
 #include "ProbabDistrib.h"
-#include "MersenneTwister.h"
+#include "FastRandom.h"
 
 
 
diff --git a/src/Protocol/MojangAPI.cpp b/src/Protocol/MojangAPI.cpp
index 67f513e44..570754204 100644
--- a/src/Protocol/MojangAPI.cpp
+++ b/src/Protocol/MojangAPI.cpp
@@ -161,26 +161,38 @@ class cMojangAPI::cUpdateThread :
 {
 	typedef cIsThread super;
 public:
-	cUpdateThread() :
-		super("cMojangAPI::cUpdateThread")
+	cUpdateThread(cMojangAPI & a_MojangAPI) :
+		super("cMojangAPI::cUpdateThread"),
+		m_MojangAPI(a_MojangAPI)
 	{
 	}
 
 	~cUpdateThread()
 	{
+		// Notify the thread that it should stop:
+		m_ShouldTerminate = true;
 		m_evtNotify.Set();
+
+		// Wait for the thread to actually finish work:
 		Stop();
 	}
 
 protected:
+
+	/** The cMojangAPI instance to update. */
+	cMojangAPI & m_MojangAPI;
+
+	/** The event used for notifying that the thread should terminate, as well as timing. */
 	cEvent m_evtNotify;
 
+
+	// cIsThread override:
 	virtual void Execute(void) override
 	{
 		do
 		{
-			cRoot::Get()->GetMojangAPI().Update();
-		} while (!m_evtNotify.Wait(60 * 60 * 1000));  // Repeat every 60 minutes
+			m_MojangAPI.Update();
+		} while (!m_ShouldTerminate && !m_evtNotify.Wait(60 * 60 * 1000));  // Repeat every 60 minutes until termination request
 	}
 } ;
 
@@ -197,7 +209,7 @@ cMojangAPI::cMojangAPI(void) :
 	m_UUIDToProfileServer(DEFAULT_UUID_TO_PROFILE_SERVER),
 	m_UUIDToProfileAddress(DEFAULT_UUID_TO_PROFILE_ADDRESS),
 	m_RankMgr(nullptr),
-	m_UpdateThread(new cUpdateThread())
+	m_UpdateThread(new cUpdateThread(*this))
 {
 }
 
diff --git a/src/Protocol/Protocol17x.cpp b/src/Protocol/Protocol17x.cpp
index 1d108ce9c..1e5fe5586 100644
--- a/src/Protocol/Protocol17x.cpp
+++ b/src/Protocol/Protocol17x.cpp
@@ -42,6 +42,7 @@ Implements the 1.7.x protocol classes:
 #include "../BlockEntities/BeaconEntity.h"
 #include "../BlockEntities/CommandBlockEntity.h"
 #include "../BlockEntities/MobHeadEntity.h"
+#include "../BlockEntities/MobSpawnerEntity.h"
 #include "../BlockEntities/FlowerPotEntity.h"
 #include "Bindings/PluginManager.h"
 
@@ -2662,6 +2663,18 @@ void cProtocol172::cPacketizer::WriteBlockEntity(const cBlockEntity & a_BlockEnt
 			Writer.AddString("id", "FlowerPot");  // "Tile Entity ID" - MC wiki; vanilla server always seems to send this though
 			break;
 		}
+		case E_BLOCK_MOB_SPAWNER:
+		{
+			cMobSpawnerEntity & MobSpawnerEntity = (cMobSpawnerEntity &)a_BlockEntity;
+
+			Writer.AddInt("x", MobSpawnerEntity.GetPosX());
+			Writer.AddInt("y", MobSpawnerEntity.GetPosY());
+			Writer.AddInt("z", MobSpawnerEntity.GetPosZ());
+			Writer.AddString("EntityId", cMonster::MobTypeToVanillaName(MobSpawnerEntity.GetEntity()));
+			Writer.AddShort("Delay", MobSpawnerEntity.GetSpawnDelay());
+			Writer.AddString("id", "MobSpawner");
+			break;
+		}
 		default: break;
 	}
 
@@ -3134,4 +3147,3 @@ void cProtocol176::HandlePacketStatusRequest(cByteBuffer & a_ByteBuffer)
 
 
 
-
diff --git a/src/Protocol/Protocol18x.cpp b/src/Protocol/Protocol18x.cpp
index 8170a494f..ce580d73e 100644
--- a/src/Protocol/Protocol18x.cpp
+++ b/src/Protocol/Protocol18x.cpp
@@ -41,6 +41,7 @@ Implements the 1.8.x protocol classes:
 #include "../BlockEntities/BeaconEntity.h"
 #include "../BlockEntities/CommandBlockEntity.h"
 #include "../BlockEntities/MobHeadEntity.h"
+#include "../BlockEntities/MobSpawnerEntity.h"
 #include "../BlockEntities/FlowerPotEntity.h"
 #include "Bindings/PluginManager.h"
 
@@ -2972,6 +2973,18 @@ void cProtocol180::cPacketizer::WriteBlockEntity(const cBlockEntity & a_BlockEnt
 			Writer.AddString("id", "FlowerPot");  // "Tile Entity ID" - MC wiki; vanilla server always seems to send this though
 			break;
 		}
+		case E_BLOCK_MOB_SPAWNER:
+		{
+			cMobSpawnerEntity & MobSpawnerEntity = (cMobSpawnerEntity &)a_BlockEntity;
+
+			Writer.AddInt("x", MobSpawnerEntity.GetPosX());
+			Writer.AddInt("y", MobSpawnerEntity.GetPosY());
+			Writer.AddInt("z", MobSpawnerEntity.GetPosZ());
+			Writer.AddString("EntityId", cMonster::MobTypeToVanillaName(MobSpawnerEntity.GetEntity()));
+			Writer.AddShort("Delay", MobSpawnerEntity.GetSpawnDelay());
+			Writer.AddString("id", "MobSpawner");
+			break;
+		}
 		default: break;
 	}
 
diff --git a/src/Root.cpp b/src/Root.cpp
index 24c1a4cc8..9f8ffeeff 100644
--- a/src/Root.cpp
+++ b/src/Root.cpp
@@ -16,7 +16,6 @@
 #include "Protocol/ProtocolRecognizer.h"  // for protocol version constants
 #include "CommandOutput.h"
 #include "DeadlockDetect.h"
-#include "OSSupport/Timer.h"
 #include "LoggerListeners.h"
 #include "BuildInfo.h"
 #include "IniFile.h"
@@ -42,7 +41,6 @@ cRoot* cRoot::s_Root = nullptr;
 
 cRoot::cRoot(void) :
 	m_pDefaultWorld(nullptr),
-	m_InputThread(nullptr),
 	m_Server(nullptr),
 	m_MonsterConfig(nullptr),
 	m_CraftingRecipes(nullptr),
@@ -68,26 +66,24 @@ cRoot::~cRoot()
 
 
 
-void cRoot::InputThread(void * a_Params)
+void cRoot::InputThread(cRoot & a_Params)
 {
-	cRoot & self = *(cRoot*)a_Params;
-
 	cLogCommandOutputCallback Output;
 	
-	while (!self.m_bStop && !self.m_bRestart && !m_TerminateEventRaised && std::cin.good())
+	while (!a_Params.m_bStop && !a_Params.m_bRestart && !m_TerminateEventRaised && std::cin.good())
 	{
 		AString Command;
 		std::getline(std::cin, Command);
 		if (!Command.empty())
 		{
-			self.ExecuteConsoleCommand(TrimString(Command), Output);
+			a_Params.ExecuteConsoleCommand(TrimString(Command), Output);
 		}
 	}
 
 	if (m_TerminateEventRaised || !std::cin.good())
 	{
 		// We have come here because the std::cin has received an EOF / a terminate signal has been sent, and the server is still running; stop the server:
-		self.m_bStop = true;
+		a_Params.m_bStop = true;
 	}
 }
 
@@ -120,9 +116,7 @@ void cRoot::Start(void)
 	m_bStop = false;
 	while (!m_bStop)
 	{
-		cTimer Time;
-		long long mseconds = Time.GetNowTime();
-		
+		auto BeginTime = std::chrono::steady_clock::now();
 		m_bRestart = false;
 
 		LoadGlobalSettings();
@@ -154,7 +148,7 @@ void cRoot::Start(void)
 		m_WebAdmin->Init();
 
 		LOGD("Loading settings...");
-		m_RankManager = new cRankManager();
+		m_RankManager.reset(new cRankManager());
 		m_RankManager->Initialize(m_MojangAPI);
 		m_CraftingRecipes = new cCraftingRecipes;
 		m_FurnaceRecipe   = new cFurnaceRecipe();
@@ -191,21 +185,25 @@ void cRoot::Start(void)
 
 		#if !defined(ANDROID_NDK)
 		LOGD("Starting InputThread...");
-		m_InputThread = new cThread( InputThread, this, "cRoot::InputThread");
-		m_InputThread->Start( false);  // We should NOT wait? Otherwise we can't stop the server from other threads than the input thread
+		try
+		{
+			m_InputThread = std::thread(InputThread, std::ref(*this));
+			m_InputThread.detach();
+		}
+		catch (std::system_error & a_Exception)
+		{
+			LOGERROR("cRoot::Start (std::thread) error %i: could not construct input thread; %s", a_Exception.code().value(), a_Exception.what());
+		}
 		#endif
 
-		long long finishmseconds = Time.GetNowTime();
-		finishmseconds -= mseconds;
-
-		LOG("Startup complete, took %lld ms!", finishmseconds);
+		LOG("Startup complete, took %ld ms!", static_cast<long int>(std::chrono::duration_cast<std::chrono::milliseconds>(std::chrono::steady_clock::now() - BeginTime).count()));
 		#ifdef _WIN32
 		EnableMenuItem(hmenu, SC_CLOSE, MF_ENABLED);  // Re-enable close button
 		#endif
 
 		while (!m_bStop && !m_bRestart && !m_TerminateEventRaised)  // These are modified by external threads
 		{
-			cSleep::MilliSleep(1000);
+			std::this_thread::sleep_for(std::chrono::seconds(1));
 		}
 
 		if (m_TerminateEventRaised)
@@ -213,10 +211,6 @@ void cRoot::Start(void)
 			m_bStop = true;
 		}
 
-		#if !defined(ANDROID_NDK)
-		delete m_InputThread; m_InputThread = nullptr;
-		#endif
-
 		// Stop the server:
 		m_WebAdmin->Stop();
 		LOG("Shutting down server...");
@@ -633,6 +627,38 @@ bool cRoot::FindAndDoWithPlayer(const AString & a_PlayerName, cPlayerListCallbac
 
 
 
+bool cRoot::DoWithPlayerByUUID(const AString & a_PlayerUUID, cPlayerListCallback & a_Callback)
+{
+	for (WorldMap::iterator itr = m_WorldsByName.begin(); itr !=  m_WorldsByName.end();itr++)
+	{
+		if (itr->second->DoWithPlayerByUUID(a_PlayerUUID, a_Callback))
+		{
+			return true;
+		}
+	}
+	return false;
+}
+
+
+
+
+
+bool cRoot::DoWithPlayer(const AString & a_PlayerName, cPlayerListCallback & a_Callback)
+{
+	for (auto World : m_WorldsByName)
+	{
+		if (World.second->DoWithPlayer(a_PlayerName, a_Callback))
+		{
+			return true;
+		}
+	}
+	return false;
+}
+
+
+
+
+
 AString cRoot::GetProtocolVersionTextFromInt(int a_ProtocolVersion)
 {
 	return cProtocolRecognizer::GetVersionTextFromInt(a_ProtocolVersion);
diff --git a/src/Root.h b/src/Root.h
index 020a6cff0..2c512a5df 100644
--- a/src/Root.h
+++ b/src/Root.h
@@ -6,6 +6,7 @@
 #include "HTTPServer/HTTPServer.h"
 #include "Defines.h"
 #include "RankManager.h"
+#include <thread>
 
 
 
@@ -86,7 +87,7 @@ public:
 	cPluginManager *   GetPluginManager  (void) { return m_PluginManager; }    // tolua_export
 	cAuthenticator &   GetAuthenticator  (void) { return m_Authenticator; }
 	cMojangAPI &       GetMojangAPI      (void) { return m_MojangAPI; }
-	cRankManager *     GetRankManager    (void) { return m_RankManager; }
+	cRankManager *     GetRankManager    (void) { return m_RankManager.get(); }
 
 	/** Queues a console command for execution through the cServer class.
 	The command will be executed in the tick thread
@@ -126,6 +127,12 @@ public:
 	/// Finds a player from a partial or complete player name and calls the callback - case-insensitive
 	bool FindAndDoWithPlayer(const AString & a_PlayerName, cPlayerListCallback & a_Callback);  // >> EXPORTED IN MANUALBINDINGS <<
 
+	/** Finds the player over his uuid and calls the callback */
+	bool DoWithPlayerByUUID(const AString & a_PlayerUUID, cPlayerListCallback & a_Callback);  // >> EXPORTED IN MANUALBINDINGS <<
+	
+	/** Finds the player using it's complete username and calls the callback */
+	bool DoWithPlayer(const AString & a_PlayerName, cPlayerListCallback & a_Callback);
+	
 	// tolua_begin
 	
 	/// Sends a chat message to all connected clients (in all worlds)
@@ -174,7 +181,7 @@ private:
 	cCriticalSection m_CSPendingCommands;
 	cCommandQueue    m_PendingCommands;
 
-	cThread * m_InputThread;
+	std::thread m_InputThread;
 
 	cServer *        m_Server;
 	cMonsterConfig * m_MonsterConfig;
@@ -185,7 +192,9 @@ private:
 	cPluginManager *   m_PluginManager;
 	cAuthenticator     m_Authenticator;
 	cMojangAPI         m_MojangAPI;
-	cRankManager *     m_RankManager;
+
+	std::unique_ptr<cRankManager> m_RankManager;
+
 	cHTTPServer        m_HTTPServer;
 
 	bool m_bStop;
@@ -207,10 +216,10 @@ private:
 	
 	/// Does the actual work of executing a command
 	void DoExecuteConsoleCommand(const AString & a_Cmd);
-
-	static void InputThread(void* a_Params);
 	
 	static cRoot* s_Root;
+
+	static void InputThread(cRoot & a_Params);
 };  // tolua_export
 
 
diff --git a/src/Server.cpp b/src/Server.cpp
index bbb5ecff3..3eaf6e096 100644
--- a/src/Server.cpp
+++ b/src/Server.cpp
@@ -4,7 +4,6 @@
 
 #include "Server.h"
 #include "ClientHandle.h"
-#include "OSSupport/Timer.h"
 #include "Mobs/Monster.h"
 #include "OSSupport/Socket.h"
 #include "Root.h"
@@ -20,8 +19,6 @@
 #include "Protocol/ProtocolRecognizer.h"
 #include "CommandOutput.h"
 
-#include "MersenneTwister.h"
-
 #include "IniFile.h"
 #include "Vector3.h"
 
@@ -75,22 +72,20 @@ cServer::cTickThread::cTickThread(cServer & a_Server) :
 
 void cServer::cTickThread::Execute(void)
 {
-	cTimer Timer;
-
-	long long msPerTick = 50;
-	long long LastTime = Timer.GetNowTime();
+	auto LastTime = std::chrono::steady_clock::now();
+	static const auto msPerTick = std::chrono::milliseconds(50);
 
 	while (!m_ShouldTerminate)
 	{
-		long long NowTime = Timer.GetNowTime();
-		float DeltaTime = (float)(NowTime-LastTime);
-		m_ShouldTerminate = !m_Server.Tick(DeltaTime);
-		long long TickTime = Timer.GetNowTime() - NowTime;
+		auto NowTime = std::chrono::steady_clock::now();
+		auto msec = std::chrono::duration_cast<std::chrono::milliseconds>(NowTime - LastTime).count();
+		m_ShouldTerminate = !m_Server.Tick(static_cast<float>(msec));
+		auto TickTime = std::chrono::steady_clock::now() - NowTime;
 		
 		if (TickTime < msPerTick)
 		{
 			// Stretch tick time until it's at least msPerTick
-			cSleep::MilliSleep((unsigned int)(msPerTick - TickTime));
+			std::this_thread::sleep_for(msPerTick - TickTime);
 		}
 
 		LastTime = NowTime;
@@ -201,6 +196,7 @@ bool cServer::InitServer(cIniFile & a_SettingsIni, bool a_ShouldAuth)
 	m_Description = a_SettingsIni.GetValueSet("Server", "Description", "MCServer - in C++!");
 	m_MaxPlayers  = a_SettingsIni.GetValueSetI("Server", "MaxPlayers", 100);
 	m_bIsHardcore = a_SettingsIni.GetValueSetB("Server", "HardcoreEnabled", false);
+	m_bAllowMultiLogin = a_SettingsIni.GetValueSetB("Server", "AllowMultiLogin", false);
 	m_PlayerCount = 0;
 	m_PlayerCountDiff = 0;
 
@@ -303,6 +299,23 @@ int cServer::GetNumPlayers(void) const
 
 
 
+bool cServer::IsPlayerInQueue(AString a_Username)
+{
+	cCSLock Lock(m_CSClients);
+	for (auto client : m_Clients)
+	{
+		if ((client->GetUsername()).compare(a_Username) == 0)
+		{
+			return true;
+		}
+	}
+	return false;
+}
+
+
+
+
+
 void cServer::PrepareKeys(void)
 {
 	LOGD("Generating protocol encryption keypair...");
diff --git a/src/Server.h b/src/Server.h
index 022794bbc..aab47987f 100644
--- a/src/Server.h
+++ b/src/Server.h
@@ -67,6 +67,14 @@ public:  // tolua_export
 	int  GetNumPlayers(void) const;
 	void SetMaxPlayers(int a_MaxPlayers) { m_MaxPlayers = a_MaxPlayers; }
 	
+	/** Check if the player is queued to be transferred to a World.
+	Returns true is Player is found in queue. */
+	bool IsPlayerInQueue(AString a_Username);
+	
+	/** Can login more than once with same username.
+	Returns false if it is not allowed, true otherwise. */
+	bool DoesAllowMultiLogin(void) { return m_bAllowMultiLogin; }
+	
 	// Hardcore mode or not:
 	bool IsHardcore(void) const { return m_bIsHardcore; }
 
@@ -216,6 +224,9 @@ private:
 	int m_MaxPlayers;
 	bool m_bIsHardcore;
 	
+	/** True - allow same username to login more than once False - only once */
+	bool m_bAllowMultiLogin;
+	
 	cTickThread m_TickThread;
 	cEvent m_RestartEvent;
 	
diff --git a/src/Simulator/FluidSimulator.cpp b/src/Simulator/FluidSimulator.cpp
index 9c8453d04..ecd74ee52 100644
--- a/src/Simulator/FluidSimulator.cpp
+++ b/src/Simulator/FluidSimulator.cpp
@@ -133,8 +133,10 @@ Direction cFluidSimulator::GetFlowingDirection(int a_X, int a_Y, int a_Z, bool a
 	/*
 	Disabled because of causing problems and being useless atm
 	char BlockBelow = m_World.GetBlock(a_X, a_Y - 1, a_Z);  // If there is nothing or fluid below it -> dominating flow is down :D
-	if (BlockBelow == E_BLOCK_AIR || IsAllowedBlock(BlockBelow))
+	if ((BlockBelow == E_BLOCK_AIR) || IsAllowedBlock(BlockBelow))
+	{
 		return Y_MINUS;
+	}
 	*/
 
 	NIBBLETYPE LowestPoint = m_World.GetBlockMeta(a_X, a_Y, a_Z);  // Current Block Meta so only lower points will be counted
@@ -182,7 +184,9 @@ Direction cFluidSimulator::GetFlowingDirection(int a_X, int a_Y, int a_Z, bool a
 	}
 
 	if (LowestPoint == m_World.GetBlockMeta(a_X, a_Y, a_Z))
+	{
 		return NONE;
+	}
 
 	if (a_X - X > 0)
 	{
diff --git a/src/StringUtils.cpp b/src/StringUtils.cpp
index 34f2da682..5febf5d6c 100644
--- a/src/StringUtils.cpp
+++ b/src/StringUtils.cpp
@@ -416,24 +416,30 @@ static bool isLegalUTF8(const unsigned char * source, int length)
 	{
 		default: return false;
 		// Everything else falls through when "true"...
-		case 4: if ((a = (*--srcptr)) < 0x80 || a > 0xBF) return false;
-		case 3: if ((a = (*--srcptr)) < 0x80 || a > 0xBF) return false;
+		case 4: if (((a = (*--srcptr)) < 0x80) || (a > 0xbf)) return false;
+		case 3: if (((a = (*--srcptr)) < 0x80) || (a > 0xbf)) return false;
 		case 2:
 		{
-			if ((a = (*--srcptr)) > 0xBF) return false;
+			if ((a = (*--srcptr)) > 0xbf)
+			{
+				return false;
+			}
 			switch (*source)
 			{
 				// no fall-through in this inner switch
-				case 0xE0: if (a < 0xA0) return false; break;
-				case 0xED: if (a > 0x9F) return false; break;
-				case 0xF0: if (a < 0x90) return false; break;
-				case 0xF4: if (a > 0x8F) return false; break;
+				case 0xe0: if (a < 0xa0) return false; break;
+				case 0xed: if (a > 0x9f) return false; break;
+				case 0xf0: if (a < 0x90) return false; break;
+				case 0xf4: if (a > 0x8f) return false; break;
 				default:   if (a < 0x80) return false;
 			}
 		}
-		case 1: if (*source >= 0x80 && *source < 0xC2) return false;
+		case 1: if ((*source >= 0x80) && (*source < 0xc2)) return false;
+	}
+	if (*source > 0xf4)
+	{
+		return false;
 	}
-	if (*source > 0xF4) return false;
 	return true;
 }
 
@@ -446,11 +452,11 @@ AString UTF8ToRawBEUTF16(const char * a_UTF8, size_t a_UTF8Length)
 	AString UTF16;
 	UTF16.reserve(a_UTF8Length * 3);
 
-	const unsigned char * source    = (const unsigned char*)a_UTF8;
+	const unsigned char * source    = (const unsigned char *)a_UTF8;
 	const unsigned char * sourceEnd = source + a_UTF8Length;
 	const int halfShift  = 10;  // used for shifting by 10 bits
 	const unsigned int halfBase = 0x0010000UL;
-	const unsigned int halfMask = 0x3FFUL;
+	const unsigned int halfMask = 0x3ffUL;
 
 	while (source < sourceEnd)
 	{
@@ -481,7 +487,7 @@ AString UTF8ToRawBEUTF16(const char * a_UTF8, size_t a_UTF8Length)
 		if (ch <= UNI_MAX_BMP)
 		{
 			// Target is a character <= 0xFFFF
-			if (ch >= UNI_SUR_HIGH_START && ch <= UNI_SUR_LOW_END)
+			if ((ch >= UNI_SUR_HIGH_START) && (ch <= UNI_SUR_LOW_END))
 			{
 				// UTF-16 surrogate values are illegal in UTF-32
 				ch = ' ';
@@ -520,7 +526,10 @@ are equivalent to the following loop:
 	{
 		ch += *source++;
 		--tmpBytesToRead;
-		if (tmpBytesToRead) ch <<= 6;
+		if (tmpBytesToRead)
+		{
+			ch <<= 6;
+		}
 	} while (tmpBytesToRead > 0);
 }
 ---------------------------------------------------------------------
@@ -723,15 +732,15 @@ AString ReplaceAllCharOccurrences(const AString & a_String, char a_From, char a_
 /// Converts one Hex character in a Base64 encoding into the data value
 static inline int UnBase64(char c)
 {
-	if (c >='A' && c <= 'Z')
+	if ((c >='A') && (c <= 'Z'))
 	{
 		return c - 'A';
 	}
-	if (c >='a' && c <= 'z')
+	if ((c >='a') && (c <= 'z'))
 	{
 		return c - 'a' + 26;
 	}
-	if (c >= '0' && c <= '9')
+	if ((c >= '0') && (c <= '9'))
 	{
 		return c - '0' + 52;
 	}
diff --git a/src/Tracer.cpp b/src/Tracer.cpp
index e125c6aa4..e604f4a5b 100644
--- a/src/Tracer.cpp
+++ b/src/Tracer.cpp
@@ -14,15 +14,15 @@
 
 
 
-cTracer::cTracer(cWorld * a_World)
-	: m_World(a_World)
+cTracer::cTracer(cWorld * a_World):
+	m_World(a_World)
 {
-	m_NormalTable[0].Set(-1, 0, 0);
-	m_NormalTable[1].Set( 0, 0, -1);
-	m_NormalTable[2].Set( 1, 0, 0);
-	m_NormalTable[3].Set( 0, 0, 1);
-	m_NormalTable[4].Set( 0, 1, 0);
-	m_NormalTable[5].Set( 0, -1, 0);
+	m_NormalTable[0].Set(-1,  0,  0);
+	m_NormalTable[1].Set( 0,  0, -1);
+	m_NormalTable[2].Set( 1,  0,  0);
+	m_NormalTable[3].Set( 0,  0,  1);
+	m_NormalTable[4].Set( 0,  1,  0);
+	m_NormalTable[5].Set( 0, -1,  0);
 }
 
 
@@ -37,10 +37,16 @@ cTracer::~cTracer()
 
 
 
-float cTracer::SigNum( float a_Num)
+float cTracer::SigNum(float a_Num)
 {
-	if (a_Num < 0.f) return -1.f;
-	if (a_Num > 0.f) return 1.f;
+	if (a_Num < 0.f)
+	{
+		return -1.f;
+	}
+	if (a_Num > 0.f)
+	{
+		return 1.f;
+	}
 	return 0.f;
 }
 
@@ -59,7 +65,10 @@ void cTracer::SetValues(const Vector3f & a_Start, const Vector3f & a_Direction)
 	step.z = (int) SigNum(dir.z);
 
 	// normalize the direction vector
-	if (dir.SqrLength() > 0.f) dir.Normalize();
+	if (dir.SqrLength() > 0.f)
+	{
+		dir.Normalize();
+	}
 
 	// how far we must move in the ray direction before
 	// we encounter a new voxel in x-direction
@@ -127,7 +136,7 @@ void cTracer::SetValues(const Vector3f & a_Start, const Vector3f & a_Direction)
 
 
 
-bool cTracer::Trace( const Vector3f & a_Start, const Vector3f & a_Direction, int a_Distance, bool a_LineOfSight)
+bool cTracer::Trace(const Vector3f & a_Start, const Vector3f & a_Direction, int a_Distance, bool a_LineOfSight)
 {
 	if ((a_Start.y < 0) || (a_Start.y >= cChunkDef::Height))
 	{
@@ -249,35 +258,42 @@ int LinesCross(float x0, float y0, float x1, float y1, float x2, float y2, float
 {
 	// float linx, liny;
 
-	float d=(x1-x0)*(y3-y2)-(y1-y0)*(x3-x2);
-	if (std::abs(d)<0.001) {return 0;}
-	float AB=((y0-y2)*(x3-x2)-(x0-x2)*(y3-y2))/d;
-	if (AB>=0.0 && AB<=1.0)
+	float d = (x1 - x0) * (y3 - y2) - (y1 - y0) * (x3 - x2);
+	if (std::abs(d) < 0.001)
 	{
-		float CD=((y0-y2)*(x1-x0)-(x0-x2)*(y1-y0))/d;
-		if (CD>=0.0 && CD<=1.0)
+		return 0;
+	}
+
+	float AB = ((y0 - y2) * (x3 - x2) - (x0 - x2) * (y3 - y2)) / d;
+	if ((AB >= 0.0) && (AB <= 1.0))
+	{
+		float CD = ((y0 - y2) * (x1 - x0) - (x0 - x2) * (y1 - y0)) / d;
+		if ((CD >= 0.0) && (CD <= 1.0))
 		{
-			// linx=x0+AB*(x1-x0);
-			// liny=y0+AB*(y1-y0);
+			// linx = x0 + AB * (x1 - x0);
+			// liny = y0 + AB * (y1 - y0);
 			return 1;
 		}
 	}
 	return 0;
 }
 
+
+
+
 // intersect3D_SegmentPlane(): intersect a segment and a plane
 //    Input:  a_Ray = a segment, and a_Plane = a plane = {Point V0; Vector n;}
 //    Output: *I0 = the intersect point (when it exists)
 //    Return: 0 = disjoint (no intersection)
 //            1 = intersection in the unique point *I0
 //            2 = the segment lies in the plane
-int cTracer::intersect3D_SegmentPlane( const Vector3f & a_Origin, const Vector3f & a_End, const Vector3f & a_PlanePos, const Vector3f & a_PlaneNormal)
+int cTracer::intersect3D_SegmentPlane(const Vector3f & a_Origin, const Vector3f & a_End, const Vector3f & a_PlanePos, const Vector3f & a_PlaneNormal)
 {
 	Vector3f    u = a_End - a_Origin;       // a_Ray.P1 - S.P0;
 	Vector3f    w = a_Origin - a_PlanePos;  // S.P0 - Pn.V0;
 
-	float     D = a_PlaneNormal.Dot( u);      // dot(Pn.n, u);
-	float     N = -(a_PlaneNormal.Dot( w));  // -dot(a_Plane.n, w);
+	float     D = a_PlaneNormal.Dot(u);      // dot(Pn.n, u);
+	float     N = -(a_PlaneNormal.Dot(w));  // -dot(a_Plane.n, w);
 
 	const float EPSILON = 0.0001f;
 	if (fabs(D) < EPSILON)
@@ -294,12 +310,12 @@ int cTracer::intersect3D_SegmentPlane( const Vector3f & a_Origin, const Vector3f
 	// they are not parallel
 	// compute intersect param
 	float sI = N / D;
-	if (sI < 0 || sI > 1)
+	if ((sI < 0) || (sI > 1))
 	{
 		return 0;  // no intersection
 	}
 
-	// Vector3f I ( a_Ray->GetOrigin() + sI * u);// S.P0 + sI * u;  // compute segment intersect point
+	// Vector3f I (a_Ray->GetOrigin() + sI * u);// S.P0 + sI * u;  // compute segment intersect point
 	RealHit = a_Origin + u * sI;
 	return 1;
 }
@@ -311,9 +327,9 @@ int cTracer::intersect3D_SegmentPlane( const Vector3f & a_Origin, const Vector3f
 int cTracer::GetHitNormal(const Vector3f & start, const Vector3f & end, const Vector3i & a_BlockPos)
 {
 	Vector3i SmallBlockPos = a_BlockPos;
-	char BlockID = m_World->GetBlock( a_BlockPos.x, a_BlockPos.y, a_BlockPos.z);
+	char BlockID = m_World->GetBlock(a_BlockPos.x, a_BlockPos.y, a_BlockPos.z);
 
-	if (BlockID == E_BLOCK_AIR || IsBlockWater(BlockID))
+	if ((BlockID == E_BLOCK_AIR) || IsBlockWater(BlockID))
 	{
 		return 0;
 	}
@@ -324,86 +340,86 @@ int cTracer::GetHitNormal(const Vector3f & start, const Vector3f & end, const Ve
 	Vector3f Look = (end - start);
 	Look.Normalize();
 
-	float dot = Look.Dot( Vector3f(-1, 0, 0));  // first face normal is x -1
+	float dot = Look.Dot(Vector3f(-1, 0, 0));  // first face normal is x -1
 	if (dot < 0)
 	{
-		int Lines = LinesCross( start.x, start.y, end.x, end.y, BlockPos.x, BlockPos.y, BlockPos.x, BlockPos.y + 1);
+		int Lines = LinesCross(start.x, start.y, end.x, end.y, BlockPos.x, BlockPos.y, BlockPos.x, BlockPos.y + 1);
 		if (Lines == 1)
 		{
-			Lines = LinesCross( start.x, start.z, end.x, end.z, BlockPos.x, BlockPos.z, BlockPos.x, BlockPos.z + 1);
+			Lines = LinesCross(start.x, start.z, end.x, end.z, BlockPos.x, BlockPos.z, BlockPos.x, BlockPos.z + 1);
 			if (Lines == 1)
 			{
-				intersect3D_SegmentPlane( start, end, BlockPos, Vector3f(-1, 0, 0));
+				intersect3D_SegmentPlane(start, end, BlockPos, Vector3f(-1, 0, 0));
 				return 1;
 			}
 		}
 	}
-	dot = Look.Dot( Vector3f(0, 0, -1));  // second face normal is z -1
+	dot = Look.Dot(Vector3f(0, 0, -1));  // second face normal is z -1
 	if (dot < 0)
 	{
-		int Lines = LinesCross( start.z, start.y, end.z, end.y, BlockPos.z, BlockPos.y, BlockPos.z, BlockPos.y + 1);
+		int Lines = LinesCross(start.z, start.y, end.z, end.y, BlockPos.z, BlockPos.y, BlockPos.z, BlockPos.y + 1);
 		if (Lines == 1)
 		{
-			Lines = LinesCross( start.z, start.x, end.z, end.x, BlockPos.z, BlockPos.x, BlockPos.z, BlockPos.x + 1);
+			Lines = LinesCross(start.z, start.x, end.z, end.x, BlockPos.z, BlockPos.x, BlockPos.z, BlockPos.x + 1);
 			if (Lines == 1)
 			{
-				intersect3D_SegmentPlane( start, end, BlockPos, Vector3f(0, 0, -1));
+				intersect3D_SegmentPlane(start, end, BlockPos, Vector3f(0, 0, -1));
 				return 2;
 			}
 		}
 	}
-	dot = Look.Dot( Vector3f(1, 0, 0));  // third face normal is x 1
+	dot = Look.Dot(Vector3f(1, 0, 0));  // third face normal is x 1
 	if (dot < 0)
 	{
-		int Lines = LinesCross( start.x, start.y, end.x, end.y, BlockPos.x + 1, BlockPos.y, BlockPos.x + 1, BlockPos.y + 1);
+		int Lines = LinesCross(start.x, start.y, end.x, end.y, BlockPos.x + 1, BlockPos.y, BlockPos.x + 1, BlockPos.y + 1);
 		if (Lines == 1)
 		{
-			Lines = LinesCross( start.x, start.z, end.x, end.z, BlockPos.x + 1, BlockPos.z, BlockPos.x + 1, BlockPos.z + 1);
+			Lines = LinesCross(start.x, start.z, end.x, end.z, BlockPos.x + 1, BlockPos.z, BlockPos.x + 1, BlockPos.z + 1);
 			if (Lines == 1)
 			{
-				intersect3D_SegmentPlane( start, end, BlockPos + Vector3f(1, 0, 0), Vector3f(1, 0, 0));
+				intersect3D_SegmentPlane(start, end, BlockPos + Vector3f(1, 0, 0), Vector3f(1, 0, 0));
 				return 3;
 			}
 		}
 	}
-	dot = Look.Dot( Vector3f(0, 0, 1));  // fourth face normal is z 1
+	dot = Look.Dot(Vector3f(0, 0, 1));  // fourth face normal is z 1
 	if (dot < 0)
 	{
-		int Lines = LinesCross( start.z, start.y, end.z, end.y, BlockPos.z + 1, BlockPos.y, BlockPos.z + 1, BlockPos.y + 1);
+		int Lines = LinesCross(start.z, start.y, end.z, end.y, BlockPos.z + 1, BlockPos.y, BlockPos.z + 1, BlockPos.y + 1);
 		if (Lines == 1)
 		{
-			Lines = LinesCross( start.z, start.x, end.z, end.x, BlockPos.z + 1, BlockPos.x, BlockPos.z + 1, BlockPos.x + 1);
+			Lines = LinesCross(start.z, start.x, end.z, end.x, BlockPos.z + 1, BlockPos.x, BlockPos.z + 1, BlockPos.x + 1);
 			if (Lines == 1)
 			{
-				intersect3D_SegmentPlane( start, end, BlockPos + Vector3f(0, 0, 1), Vector3f(0, 0, 1));
+				intersect3D_SegmentPlane(start, end, BlockPos + Vector3f(0, 0, 1), Vector3f(0, 0, 1));
 				return 4;
 			}
 		}
 	}
-	dot = Look.Dot( Vector3f(0, 1, 0));  // fifth face normal is y 1
+	dot = Look.Dot(Vector3f(0, 1, 0));  // fifth face normal is y 1
 	if (dot < 0)
 	{
-		int Lines = LinesCross( start.y, start.x, end.y, end.x, BlockPos.y + 1, BlockPos.x, BlockPos.y + 1, BlockPos.x + 1);
+		int Lines = LinesCross(start.y, start.x, end.y, end.x, BlockPos.y + 1, BlockPos.x, BlockPos.y + 1, BlockPos.x + 1);
 		if (Lines == 1)
 		{
-			Lines = LinesCross( start.y, start.z, end.y, end.z, BlockPos.y + 1, BlockPos.z, BlockPos.y + 1, BlockPos.z + 1);
+			Lines = LinesCross(start.y, start.z, end.y, end.z, BlockPos.y + 1, BlockPos.z, BlockPos.y + 1, BlockPos.z + 1);
 			if (Lines == 1)
 			{
-				intersect3D_SegmentPlane( start, end, BlockPos + Vector3f(0, 1, 0), Vector3f(0, 1, 0));
+				intersect3D_SegmentPlane(start, end, BlockPos + Vector3f(0, 1, 0), Vector3f(0, 1, 0));
 				return 5;
 			}
 		}
 	}
-	dot = Look.Dot( Vector3f(0, -1, 0));  // sixth face normal is y -1
+	dot = Look.Dot(Vector3f(0, -1, 0));  // sixth face normal is y -1
 	if (dot < 0)
 	{
-		int Lines = LinesCross( start.y, start.x, end.y, end.x, BlockPos.y, BlockPos.x, BlockPos.y, BlockPos.x + 1);
+		int Lines = LinesCross(start.y, start.x, end.y, end.x, BlockPos.y, BlockPos.x, BlockPos.y, BlockPos.x + 1);
 		if (Lines == 1)
 		{
-			Lines = LinesCross( start.y, start.z, end.y, end.z, BlockPos.y, BlockPos.z, BlockPos.y, BlockPos.z + 1);
+			Lines = LinesCross(start.y, start.z, end.y, end.z, BlockPos.y, BlockPos.z, BlockPos.y, BlockPos.z + 1);
 			if (Lines == 1)
 			{
-				intersect3D_SegmentPlane( start, end, BlockPos, Vector3f(0, -1, 0));
+				intersect3D_SegmentPlane(start, end, BlockPos, Vector3f(0, -1, 0));
 				return 6;
 			}
 		}
diff --git a/src/UI/SlotArea.cpp b/src/UI/SlotArea.cpp
index 9113ec343..e784569d9 100644
--- a/src/UI/SlotArea.cpp
+++ b/src/UI/SlotArea.cpp
@@ -1167,7 +1167,7 @@ void cSlotAreaAnvil::UpdateResult(cPlayer & a_Player)
 	{
 		m_MaximumCost = 39;
 	}
-	if (m_MaximumCost >= 40 && !a_Player.IsGameModeCreative())
+	if ((m_MaximumCost >= 40) && !a_Player.IsGameModeCreative())
 	{
 		Input.Empty();
 	}
@@ -2322,7 +2322,7 @@ cItem * cSlotAreaTemporary::GetPlayerSlots(cPlayer & a_Player)
 	{
 		return nullptr;
 	}
-	return &(itr->second[0]);
+	return itr->second.data();
 }
 
 
diff --git a/src/Vector3.h b/src/Vector3.h
index 1854e42e3..1e4a1f5d9 100644
--- a/src/Vector3.h
+++ b/src/Vector3.h
@@ -93,6 +93,21 @@ public:
 		return x * a_Rhs.x + y * a_Rhs.y + z * a_Rhs.z;
 	}
 
+	inline void abs()
+	{
+		x = (x < 0) ? -x : x;
+		y = (y < 0) ? -y : y;
+		z = (z < 0) ? -z : z;
+	}
+
+	// We can't use a capital letter, because we wouldn't be able to call the normal Clamp function.
+	inline void clamp(T a_Min, T a_Max)
+	{
+		x = Clamp(x, a_Min, a_Max);
+		y = Clamp(y, a_Min, a_Max);
+		z = Clamp(z, a_Min, a_Max);
+	}
+	
 	inline Vector3<T> Cross(const Vector3<T> & a_Rhs) const
 	{
 		return Vector3<T>(
diff --git a/src/VoronoiMap.h b/src/VoronoiMap.h
index dfb11e9ce..56022849e 100644
--- a/src/VoronoiMap.h
+++ b/src/VoronoiMap.h
@@ -9,7 +9,7 @@
 
 #pragma once
 
-#include "Noise.h"
+#include "Noise/Noise.h"
 
 
 
diff --git a/src/World.cpp b/src/World.cpp
index 8f326cea4..6783bd533 100644
--- a/src/World.cpp
+++ b/src/World.cpp
@@ -11,7 +11,6 @@
 #include "IniFile.h"
 #include "ChunkMap.h"
 #include "Generating/ChunkDesc.h"
-#include "OSSupport/Timer.h"
 #include "SetChunkData.h"
 
 // Serializers
@@ -45,7 +44,6 @@
 #include "MobCensus.h"
 #include "MobSpawner.h"
 
-#include "MersenneTwister.h"
 #include "Generating/Trees.h"
 #include "Bindings/PluginManager.h"
 #include "Blocks/BlockHandler.h"
@@ -74,102 +72,134 @@ const int TIME_SPAWN_DIVISOR =   148;
 
 
 ////////////////////////////////////////////////////////////////////////////////
-// cWorldLoadProgress:
+// cSpawnPrepare:
 
-/// A simple thread that displays the progress of world loading / saving in cWorld::InitializeSpawn()
-class cWorldLoadProgress :
-	public cIsThread
+/** Generates and lights the spawn area of the world. Runs as a separate thread. */
+class cSpawnPrepare:
+	public cIsThread,
+	public cChunkCoordCallback
 {
+	typedef cIsThread super;
+
 public:
-	cWorldLoadProgress(cWorld * a_World) :
-		cIsThread("cWorldLoadProgress"),
-		m_World(a_World)
-	{
+	cSpawnPrepare(cWorld & a_World, int a_SpawnChunkX, int a_SpawnChunkZ, int a_PrepareDistance):
+		super("SpawnPrepare"),
+		m_World(a_World),
+		m_SpawnChunkX(a_SpawnChunkX),
+		m_SpawnChunkZ(a_SpawnChunkZ),
+		m_PrepareDistance(a_PrepareDistance),
+		m_MaxIdx(a_PrepareDistance * a_PrepareDistance),
+		m_NumPrepared(0),
+		m_LastReportChunkCount(0)
+	{
+		// Start the thread:
 		Start();
+
+		// Wait for start confirmation, so that the thread can be waited-upon after the constructor returns:
+		m_EvtStarted.Wait();
 	}
-	
-	void Stop(void)
-	{
-		m_ShouldTerminate = true;
-		Wait();
-	}
-	
-protected:
 
-	cWorld * m_World;
-	
+
+	// cIsThread override:
 	virtual void Execute(void) override
 	{
-		for (;;)
+		// Confirm thread start:
+		m_EvtStarted.Set();
+
+		// Queue the initial chunks:
+		m_MaxIdx = m_PrepareDistance * m_PrepareDistance;
+		int maxQueue = std::min(m_MaxIdx - 1, 100);  // Number of chunks to queue at once
+		m_NextIdx = maxQueue;
+		m_LastReportTime = std::chrono::steady_clock::now();
+		for (int i = 0; i < maxQueue; i++)
 		{
-			LOG("" SIZE_T_FMT  " chunks to load, %d chunks to generate",
-				m_World->GetStorage().GetLoadQueueLength(),
-				m_World->GetGenerator().GetQueueLength()
-			);
-			
-			// Wait for 2 sec, but be "reasonably wakeable" when the thread is to finish
-			for (int i = 0; i < 20; i++)
-			{
-				cSleep::MilliSleep(100);
-				if (m_ShouldTerminate)
-				{
-					return;
-				}
-			}
-		}  // for (-ever)
+			int chunkX, chunkZ;
+			DecodeChunkCoords(i, chunkX, chunkZ);
+			m_World.PrepareChunk(chunkX, chunkZ, this);
+		}  // for i
+
+		// Wait for the lighting thread to prepare everything. Event is set in the Call() callback:
+		m_EvtFinished.Wait();
 	}
-	
-} ;
 
+protected:
+	cWorld & m_World;
+	int m_SpawnChunkX;
+	int m_SpawnChunkZ;
+	int m_PrepareDistance;
 
+	/** The index of the next chunk to be queued in the lighting thread. */
+	int m_NextIdx;
 
+	/** The maximum index of the prepared chunks. Queueing stops when m_NextIdx reaches this number. */
+	int m_MaxIdx;
 
+	/** Total number of chunks already finished preparing. Preparation finishes when this number reaches m_MaxIdx. */
+	int m_NumPrepared;
 
-////////////////////////////////////////////////////////////////////////////////
-// cWorldLightingProgress:
+	/** Event used to signal that the thread has started. */
+	cEvent m_EvtStarted;
 
-/// A simple thread that displays the progress of world lighting in cWorld::InitializeSpawn()
-class cWorldLightingProgress :
-	public cIsThread
-{
-public:
-	cWorldLightingProgress(cLightingThread * a_Lighting) :
-		cIsThread("cWorldLightingProgress"),
-		m_Lighting(a_Lighting)
-	{
-		Start();
-	}
-	
-	void Stop(void)
+	/** Event used to signal that the preparation is finished. */
+	cEvent m_EvtFinished;
+
+	/** The timestamp of the last progress report emitted. */
+	std::chrono::steady_clock::time_point m_LastReportTime;
+
+	/** Number of chunks prepared when the last progress report was emitted. */
+	int m_LastReportChunkCount;
+
+	// cChunkCoordCallback override:
+	virtual void Call(int a_ChunkX, int a_ChunkZ)
 	{
-		m_ShouldTerminate = true;
-		Wait();
+		// Check if this was the last chunk:
+		m_NumPrepared += 1;
+		if (m_NumPrepared >= m_MaxIdx)
+		{
+			m_EvtFinished.Set();
+			// Must return here, because "this" may have gotten deleted by the previous line
+			return;
+		}
+
+		// Queue another chunk, if appropriate:
+		if (m_NextIdx < m_MaxIdx)
+		{
+			int chunkX, chunkZ;
+			DecodeChunkCoords(m_NextIdx, chunkX, chunkZ);
+			m_World.GetLightingThread().QueueChunk(chunkX, chunkZ, this);
+			m_NextIdx += 1;
+		}
+
+		// Report progress every 1 second:
+		auto Now = std::chrono::steady_clock::now();
+		if (Now - m_LastReportTime > std::chrono::seconds(1))
+		{
+			float PercentDone = static_cast<float>(m_NumPrepared * 100) / m_MaxIdx;
+			float ChunkSpeed = static_cast<float>((m_NumPrepared - m_LastReportChunkCount) * 1000) / std::chrono::duration_cast<std::chrono::milliseconds>(Now - m_LastReportTime).count();
+			LOG("Preparing spawn (%s): %.02f%% (%d/%d; %.02f chunks/s)",
+				m_World.GetName().c_str(), PercentDone, m_NumPrepared, m_MaxIdx, ChunkSpeed
+			);
+			m_LastReportTime = Now;
+			m_LastReportChunkCount = m_NumPrepared;
+		}
 	}
-	
-protected:
 
-	cLightingThread * m_Lighting;
-	
-	virtual void Execute(void) override
+
+	/** Decodes the index into chunk coords. Provides the specific chunk ordering. */
+	void DecodeChunkCoords(int a_Idx, int & a_ChunkX, int & a_ChunkZ)
 	{
-		for (;;)
+		// A zigzag pattern from the top to bottom, each row alternating between forward-x and backward-x:
+		int z = a_Idx / m_PrepareDistance;
+		int x = a_Idx % m_PrepareDistance;
+		if ((z & 1) == 0)
 		{
-			LOG("" SIZE_T_FMT  " chunks remaining to light", m_Lighting->GetQueueLength()
-			);
-			
-			// Wait for 2 sec, but be "reasonably wakeable" when the thread is to finish
-			for (int i = 0; i < 20; i++)
-			{
-				cSleep::MilliSleep(100);
-				if (m_ShouldTerminate)
-				{
-					return;
-				}
-			}
-		}  // for (-ever)
+			// Reverse every second row:
+			x = m_PrepareDistance - 1 - x;
+		}
+		a_ChunkZ = m_SpawnChunkZ + z - m_PrepareDistance / 2;
+		a_ChunkX = m_SpawnChunkX + x - m_PrepareDistance / 2;
 	}
-	
-} ;
+};
 
 
 
@@ -202,23 +232,22 @@ cWorld::cTickThread::cTickThread(cWorld & a_World) :
 
 void cWorld::cTickThread::Execute(void)
 {
-	cTimer Timer;
-
-	const Int64 msPerTick = 50;
-	Int64 LastTime = Timer.GetNowTime();
+	auto LastTime = std::chrono::steady_clock::now();
+	static const auto msPerTick = std::chrono::milliseconds(50);
+	auto TickTime = std::chrono::steady_clock::duration(50);
 
-	Int64 TickDuration = 50;
 	while (!m_ShouldTerminate)
 	{
-		Int64 NowTime = Timer.GetNowTime();
-		float DeltaTime = (float)(NowTime - LastTime);
-		m_World.Tick(DeltaTime, (int)TickDuration);
-		TickDuration = Timer.GetNowTime() - NowTime;
+		auto NowTime = std::chrono::steady_clock::now();
+		auto msec = std::chrono::duration_cast<std::chrono::milliseconds>(NowTime - LastTime).count();
+		auto LastTickMsec = std::chrono::duration_cast<std::chrono::duration<int>>(TickTime).count();
+		m_World.Tick(static_cast<float>(msec), LastTickMsec);
+		TickTime = std::chrono::steady_clock::now() - NowTime;
 		
-		if (TickDuration < msPerTick)
+		if (TickTime < msPerTick)
 		{
 			// Stretch tick time until it's at least msPerTick
-			cSleep::MilliSleep((unsigned int)(msPerTick - TickDuration));
+			std::this_thread::sleep_for(msPerTick - TickTime);
 		}
 
 		LastTime = NowTime;
@@ -283,6 +312,7 @@ cWorld::cWorld(const AString & a_WorldName, eDimension a_Dimension, const AStrin
 	m_bCommandBlocksEnabled(true),
 	m_bUseChatPrefixes(false),
 	m_TNTShrapnelLevel(slNone),
+	m_MaxViewDistance(12),
 	m_Scoreboard(this),
 	m_MapManager(this),
 	m_GeneratorCallbacks(*this),
@@ -316,6 +346,10 @@ cWorld::~cWorld()
 	Serializer.Save();
 
 	m_MapManager.SaveMapData();
+
+	// Explicitly destroy the chunkmap, so that it's guaranteed to be destroyed before the other internals
+	// This fixes crashes on stopping the server, because chunk destructor deletes entities and those access the world.
+	m_ChunkMap.reset();
 }
 
 
@@ -431,53 +465,9 @@ void cWorld::InitializeSpawn(void)
 	IniFile.ReadFile(m_IniFileName);
 	int ViewDist = IniFile.GetValueSetI("SpawnPosition", "PregenerateDistance", DefaultViewDist);
 	IniFile.WriteFile(m_IniFileName);
-	
-	LOG("Preparing spawn area in world \"%s\", %d x %d chunks, total %d chunks...", m_WorldName.c_str(), ViewDist, ViewDist, ViewDist * ViewDist);
-	for (int x = 0; x < ViewDist; x++)
-	{
-		for (int z = 0; z < ViewDist; z++)
-		{
-			m_ChunkMap->TouchChunk(x + ChunkX-(ViewDist - 1) / 2, z + ChunkZ-(ViewDist - 1) / 2);  // Queue the chunk in the generator / loader
-		}
-	}
-	
-	{
-		// Display progress during this process:
-		cWorldLoadProgress Progress(this);
-		
-		// Wait for the loader to finish loading
-		m_Storage.WaitForLoadQueueEmpty();
-		
-		// Wait for the generator to finish generating
-		m_Generator.WaitForQueueEmpty();
 
-		// Wait for the loader to finish saving
-		m_Storage.WaitForSaveQueueEmpty();
-		
-		Progress.Stop();
-	}
-	
-	// Light all chunks that have been newly generated:
-	LOG("Lighting spawn area in world \"%s\"...", m_WorldName.c_str());
-	
-	for (int x = 0; x < ViewDist; x++)
-	{
-		int ChX = x + ChunkX-(ViewDist - 1) / 2;
-		for (int z = 0; z < ViewDist; z++)
-		{
-			int ChZ = z + ChunkZ-(ViewDist - 1) / 2;
-			if (!m_ChunkMap->IsChunkLighted(ChX, ChZ))
-			{
-				m_Lighting.QueueChunk(ChX, ChZ);  // Queue the chunk in the lighting thread
-			}
-		}  // for z
-	}  // for x
-	
-	{
-		cWorldLightingProgress Progress(&m_Lighting);
-		m_Lighting.WaitForQueueEmpty();
-		Progress.Stop();
-	}
+	cSpawnPrepare prep(*this, ChunkX, ChunkZ, ViewDist);
+	prep.Wait();
 	
 	#ifdef TEST_LINEBLOCKTRACER
 	// DEBUG: Test out the cLineBlockTracer class by tracing a few lines:
@@ -561,6 +551,8 @@ void cWorld::Start(void)
 	m_BroadcastDeathMessages = IniFile.GetValueSetB("Broadcasting", "BroadcastDeathMessages", true);
 	m_BroadcastAchievementMessages = IniFile.GetValueSetB("Broadcasting", "BroadcastAchievementMessages", true);
 
+	SetMaxViewDistance(IniFile.GetValueSetI("SpawnPosition", "MaxViewDistance", 12));
+
 	// Try to find the "SpawnPosition" key and coord values in the world configuration, set the flag if found
 	int KeyNum = IniFile.FindKey("SpawnPosition");
 	m_IsSpawnExplicitlySet =
@@ -618,7 +610,7 @@ void cWorld::Start(void)
 	}
 	
 	// Adjust the enum-backed variables into their respective bounds:
-	m_GameMode         = (eGameMode)     Clamp(GameMode,         (int)gmSurvival, (int)gmAdventure);
+	m_GameMode         = (eGameMode)     Clamp(GameMode,         (int)gmSurvival, (int)gmSpectator);
 	m_TNTShrapnelLevel = (eShrapnelLevel)Clamp(TNTShrapnelLevel, (int)slNone,     (int)slAll);
 	m_Weather          = (eWeather)      Clamp(Weather,          (int)wSunny,     (int)wStorm);
 
@@ -738,28 +730,32 @@ void cWorld::InitialiseGeneratorDefaults(cIniFile & a_IniFile)
 	{
 		case dimEnd:
 		{
-			a_IniFile.GetValueSet("Generator", "BiomeGen", "Constant");
-			a_IniFile.GetValueSet("Generator", "ConstantBiome", "End");
-			a_IniFile.GetValueSet("Generator", "HeightGen", "Biomal");
+			a_IniFile.GetValueSet("Generator", "Generator",      "Composable");
+			a_IniFile.GetValueSet("Generator", "BiomeGen",       "Constant");
+			a_IniFile.GetValueSet("Generator", "ConstantBiome",  "End");
+			a_IniFile.GetValueSet("Generator", "ShapeGen",       "End");
 			a_IniFile.GetValueSet("Generator", "CompositionGen", "End");
 			break;
 		}
 		case dimOverworld:
 		{
-			a_IniFile.GetValueSet("Generator", "BiomeGen", "MultiStepMap");
-			a_IniFile.GetValueSet("Generator", "HeightGen", "DistortedHeightmap");
-			a_IniFile.GetValueSet("Generator", "CompositionGen", "DistortedHeightmap");
-			a_IniFile.GetValueSet("Generator", "Finishers", "Ravines, WormNestCaves, WaterLakes, WaterSprings, LavaLakes, LavaSprings, OreNests, Mineshafts, Trees, SprinkleFoliage, Ice, Snow, Lilypads, BottomLava, DeadBushes, PreSimulator");
+			a_IniFile.GetValueSet("Generator", "Generator",      "Composable");
+			a_IniFile.GetValueSet("Generator", "BiomeGen",       "Grown");
+			a_IniFile.GetValueSet("Generator", "ShapeGen",       "BiomalNoise3D");
+			a_IniFile.GetValueSet("Generator", "CompositionGen", "Biomal");
+			a_IniFile.GetValueSet("Generator", "Finishers",      "Ravines, WormNestCaves, WaterLakes, WaterSprings, LavaLakes, LavaSprings, OreNests, Mineshafts, Trees, Villages, SprinkleFoliage, Ice, Snow, Lilypads, BottomLava, DeadBushes, NaturalPatches, PreSimulator, Animals");
 			break;
 		}
 		case dimNether:
 		{
-			a_IniFile.GetValueSet("Generator", "BiomeGen", "Constant");
-			a_IniFile.GetValueSet("Generator", "ConstantBiome", "Nether");
-			a_IniFile.GetValueSet("Generator", "HeightGen", "Flat");
-			a_IniFile.GetValueSet("Generator", "FlatHeight", "128");
-			a_IniFile.GetValueSet("Generator", "CompositionGen", "Nether");
-			a_IniFile.GetValueSet("Generator", "Finishers", "WormNestCaves, BottomLava, LavaSprings, NetherClumpFoliage, NetherForts, PreSimulator");
+			a_IniFile.GetValueSet("Generator", "Generator",        "Composable");
+			a_IniFile.GetValueSet("Generator", "BiomeGen",         "Constant");
+			a_IniFile.GetValueSet("Generator", "ConstantBiome",    "Nether");
+			a_IniFile.GetValueSet("Generator", "ShapeGen",         "HeightMap");
+			a_IniFile.GetValueSet("Generator", "HeightGen",        "Flat");
+			a_IniFile.GetValueSet("Generator", "FlatHeight",       "128");
+			a_IniFile.GetValueSet("Generator", "CompositionGen",   "Nether");
+			a_IniFile.GetValueSet("Generator", "Finishers",        "SoulsandRims, WormNestCaves, BottomLava, LavaSprings, NetherClumpFoliage, NetherOreNests, NetherForts, PreSimulator");
 			a_IniFile.GetValueSet("Generator", "BottomLavaHeight", "30");
 			break;
 		}
@@ -1809,7 +1805,7 @@ void cWorld::SpawnItemPickups(const cItems & a_Pickups, double a_BlockX, double
 	a_FlyAwaySpeed /= 100;  // Pre-divide, so that we don't have to divide each time inside the loop
 	for (cItems::const_iterator itr = a_Pickups.begin(); itr != a_Pickups.end(); ++itr)
 	{
-		if (!IsValidItem(itr->m_ItemType) || itr->m_ItemType == E_BLOCK_AIR)
+		if (!IsValidItem(itr->m_ItemType) || (itr->m_ItemType == E_BLOCK_AIR))
 		{
 			// Don't spawn pickup if item isn't even valid; should prevent client crashing too
 			continue;
@@ -1835,7 +1831,7 @@ void cWorld::SpawnItemPickups(const cItems & a_Pickups, double a_BlockX, double
 {
 	for (cItems::const_iterator itr = a_Pickups.begin(); itr != a_Pickups.end(); ++itr)
 	{
-		if (!IsValidItem(itr->m_ItemType) || itr->m_ItemType == E_BLOCK_AIR)
+		if (!IsValidItem(itr->m_ItemType) || (itr->m_ItemType == E_BLOCK_AIR))
 		{
 			continue;
 		}
@@ -2680,7 +2676,7 @@ bool cWorld::ForEachPlayer(cPlayerListCallback & a_Callback)
 
 bool cWorld::DoWithPlayer(const AString & a_PlayerName, cPlayerListCallback & a_Callback)
 {
-	// Calls the callback for each player in the list
+	// Calls the callback for the specified player in the list
 	cCSLock Lock(m_CSPlayers);
 	for (cPlayerList::iterator itr = m_Players.begin(); itr != m_Players.end(); ++itr)
 	{
@@ -2729,6 +2725,23 @@ bool cWorld::FindAndDoWithPlayer(const AString & a_PlayerNameHint, cPlayerListCa
 
 
 
+bool cWorld::DoWithPlayerByUUID(const AString & a_PlayerUUID, cPlayerListCallback & a_Callback)
+{
+	cCSLock Lock(m_CSPlayers);
+	for (cPlayerList::iterator itr = m_Players.begin(); itr != m_Players.end(); ++itr)
+	{
+		if ((*itr)->GetUUID() == a_PlayerUUID)
+		{
+			return a_Callback.Item(*itr);
+		}
+	}
+	return false;
+}
+
+
+
+
+
 // TODO: This interface is dangerous!
 cPlayer * cWorld::FindClosestPlayer(const Vector3d & a_Pos, float a_SightLimit, bool a_CheckLineOfSight)
 {
@@ -2894,6 +2907,15 @@ void cWorld::TouchChunk(int a_ChunkX, int a_ChunkZ)
 
 
 
+void cWorld::PrepareChunk(int a_ChunkX, int a_ChunkZ, cChunkCoordCallback * a_CallAfter)
+{
+	m_ChunkMap->PrepareChunk(a_ChunkX, a_ChunkZ, a_CallAfter);
+}
+
+
+
+
+
 void cWorld::ChunkLoadFailed(int a_ChunkX, int a_ChunkZ)
 {
 	m_ChunkMap->ChunkLoadFailed(a_ChunkX, a_ChunkZ);
@@ -2909,25 +2931,19 @@ bool cWorld::SetSignLines(int a_BlockX, int a_BlockY, int a_BlockZ, const AStrin
 	AString Line2(a_Line2);
 	AString Line3(a_Line3);
 	AString Line4(a_Line4);
+
 	if (cRoot::Get()->GetPluginManager()->CallHookUpdatingSign(*this, a_BlockX, a_BlockY, a_BlockZ, Line1, Line2, Line3, Line4, a_Player))
 	{
 		return false;
 	}
+
 	if (m_ChunkMap->SetSignLines(a_BlockX, a_BlockY, a_BlockZ, Line1, Line2, Line3, Line4))
 	{
 		cRoot::Get()->GetPluginManager()->CallHookUpdatedSign(*this, a_BlockX, a_BlockY, a_BlockZ, Line1, Line2, Line3, Line4, a_Player);
 		return true;
 	}
-	return false;
-}
-
-
-
-
 
-bool cWorld::UpdateSign(int a_BlockX, int a_BlockY, int a_BlockZ, const AString & a_Line1, const AString & a_Line2, const AString & a_Line3, const AString & a_Line4, cPlayer * a_Player)
-{
-	return SetSignLines(a_BlockX, a_BlockY, a_BlockZ, a_Line1, a_Line2, a_Line3, a_Line4, a_Player);
+	return false;
 }
 
 
@@ -3010,7 +3026,7 @@ void cWorld::RegenerateChunk(int a_ChunkX, int a_ChunkZ)
 
 void cWorld::GenerateChunk(int a_ChunkX, int a_ChunkZ)
 {
-	m_ChunkMap->TouchChunk(a_ChunkX, a_ChunkZ);
+	m_ChunkMap->GenerateChunk(a_ChunkX, a_ChunkZ);
 }
 
 
@@ -3119,6 +3135,11 @@ bool cWorld::HasEntity(int a_UniqueID)
 	}
 
 	// Check if the entity is in the chunkmap:
+	if (m_ChunkMap.get() == nullptr)
+	{
+		// Chunkmap has already been destroyed, there are no entities anymore.
+		return false;
+	}
 	return m_ChunkMap->HasEntity(a_UniqueID);
 }
 
@@ -3657,3 +3678,4 @@ void cWorld::cChunkGeneratorCallbacks::CallHookChunkGenerated (cChunkDesc & a_Ch
 
 
 
+
diff --git a/src/World.h b/src/World.h
index e54ba263d..4f24280a4 100644
--- a/src/World.h
+++ b/src/World.h
@@ -10,7 +10,6 @@
 #define MAX_PLAYERS 65535
 
 #include "Simulator/SimulatorManager.h"
-#include "MersenneTwister.h"
 #include "ChunkMap.h"
 #include "WorldStorage/WorldStorage.h"
 #include "Generating/ChunkGenerator.h"
@@ -26,6 +25,8 @@
 #include "MapManager.h"
 #include "Blocks/WorldInterface.h"
 #include "Blocks/BroadcastInterface.h"
+#include "FastRandom.h"
+#include "ClientHandle.h"
 
 
 
@@ -313,7 +314,8 @@ public:
 	/** Calls the callback for each player in the list; returns true if all players processed, false if the callback aborted by returning true */
 	virtual bool ForEachPlayer(cPlayerListCallback & a_Callback) override;  // >> EXPORTED IN MANUALBINDINGS <<
 
-	/** Calls the callback for the player of the given name; returns true if the player was found and the callback called, false if player not found. Callback return ignored */
+	/** Calls the callback for the player of the given name; returns true if the player was found and the callback called, false if player not found.
+	Callback return value is ignored. If there are multiple players of the same name, only (random) one is processed by the callback. */
 	bool DoWithPlayer(const AString & a_PlayerName, cPlayerListCallback & a_Callback);  // >> EXPORTED IN MANUALBINDINGS <<
 
 	/** Finds a player from a partial or complete player name and calls the callback - case-insensitive */
@@ -322,6 +324,9 @@ public:
 	// TODO: This interface is dangerous - rewrite to DoWithClosestPlayer(pos, sight, action)
 	cPlayer * FindClosestPlayer(const Vector3d & a_Pos, float a_SightLimit, bool a_CheckLineOfSight = true);
 	
+	/** Finds the player over his uuid and calls the callback */
+	bool DoWithPlayerByUUID(const AString & a_PlayerUUID, cPlayerListCallback & a_Callback);  // >> EXPORTED IN MANUALBINDINGS <<
+
 	void SendPlayerList(cPlayer * a_DestPlayer);  // Sends playerlist to the player
 
 	/** Adds the entity into its appropriate chunk; takes ownership of the entity ptr.
@@ -369,15 +374,18 @@ public:
 	
 	/** Touches the chunk, causing it to be loaded or generated */
 	void TouchChunk(int a_ChunkX, int a_ChunkZ);
+
+	/** Queues the chunk for preparing - making sure that it's generated and lit.
+	The specified chunk is queued to be loaded or generated, and lit if needed.
+	The specified callback is called after the chunk has been prepared. If there's no preparation to do, only the callback is called.
+	It is legal to call with no callback. */
+	void PrepareChunk(int a_ChunkX, int a_ChunkZ, cChunkCoordCallback * a_CallAfter = nullptr);
 	
 	/** Marks the chunk as failed-to-load: */
 	void ChunkLoadFailed(int a_ChunkX, int a_ChunkZ);
 	
-	/** Sets the sign text, asking plugins for permission first. a_Player is the player who this change belongs to, may be nullptr. Returns true if sign text changed. Same as UpdateSign() */
+	/** Sets the sign text, asking plugins for permission first. a_Player is the player who this change belongs to, may be nullptr. Returns true if sign text changed. */
 	bool SetSignLines(int a_BlockX, int a_BlockY, int a_BlockZ, const AString & a_Line1, const AString & a_Line2, const AString & a_Line3, const AString & a_Line4, cPlayer * a_Player = nullptr);  // Exported in ManualBindings.cpp
-	
-	/** Sets the sign text, asking plugins for permission first. a_Player is the player who this change belongs to, may be nullptr. Returns true if sign text changed. Same as SetSignLines() */
-	bool UpdateSign(int a_X, int a_Y, int a_Z, const AString & a_Line1, const AString & a_Line2, const AString & a_Line3, const AString & a_Line4, cPlayer * a_Player = nullptr);  // Exported in ManualBindings.cpp
 
 	/** Sets the command block command. Returns true if command changed. */
 	bool SetCommandBlockCommand(int a_BlockX, int a_BlockY, int a_BlockZ, const AString & a_Command);  // tolua_export
@@ -645,6 +653,12 @@ public:
 	eShrapnelLevel GetTNTShrapnelLevel(void) const { return m_TNTShrapnelLevel; }
 	void SetTNTShrapnelLevel(eShrapnelLevel a_Flag) { m_TNTShrapnelLevel = a_Flag; }
 
+	int GetMaxViewDistance(void) const { return m_MaxViewDistance; }
+	void SetMaxViewDistance(int a_MaxViewDistance)
+	{
+		m_MaxViewDistance = Clamp(a_MaxViewDistance, cClientHandle::MIN_VIEW_DISTANCE, cClientHandle::MAX_VIEW_DISTANCE);
+	}
+
 	bool ShouldUseChatPrefixes(void) const { return m_bUseChatPrefixes; }
 	void SetShouldUseChatPrefixes(bool a_Flag) { m_bUseChatPrefixes = a_Flag; }
 
@@ -688,6 +702,8 @@ public:
 	inline size_t GetStorageLoadQueueLength(void) { return m_Storage.GetLoadQueueLength(); }    // tolua_export
 	inline size_t GetStorageSaveQueueLength(void) { return m_Storage.GetSaveQueueLength(); }    // tolua_export
 
+	cLightingThread & GetLightingThread(void) { return m_Lighting; }
+
 	void InitializeSpawn(void);
 	
 	/** Starts threads that belong to this world */
@@ -797,7 +813,7 @@ public:
 	This function allows nesting and task-concurrency (multiple separate tasks can request ticking and as long
 	as at least one requests is active the chunk will be ticked). */
 	void SetChunkAlwaysTicked(int a_ChunkX, int a_ChunkZ, bool a_AlwaysTicked = true);  // tolua_export
-
+	
 private:
 
 	friend class cRoot;
@@ -960,6 +976,9 @@ private:
 	*/
 	eShrapnelLevel m_TNTShrapnelLevel;
 
+	/** The maximum view distance that a player can have in this world. */
+	int m_MaxViewDistance;
+
 	/** Name of the nether world */
 	AString m_NetherWorldName;
 
diff --git a/src/WorldStorage/FireworksSerializer.cpp b/src/WorldStorage/FireworksSerializer.cpp
index ecb600483..91a5b8b63 100644
--- a/src/WorldStorage/FireworksSerializer.cpp
+++ b/src/WorldStorage/FireworksSerializer.cpp
@@ -22,11 +22,11 @@ void cFireworkItem::WriteToNBTCompound(const cFireworkItem & a_FireworkItem, cFa
 			a_Writer.AddByte("Type", a_FireworkItem.m_Type);
 			if (!a_FireworkItem.m_Colours.empty())
 			{
-				a_Writer.AddIntArray("Colors", &(a_FireworkItem.m_Colours[0]), a_FireworkItem.m_Colours.size());
+				a_Writer.AddIntArray("Colors", a_FireworkItem.m_Colours.data(), a_FireworkItem.m_Colours.size());
 			}
 			if (!a_FireworkItem.m_FadeColours.empty())
 			{
-				a_Writer.AddIntArray("FadeColors", &(a_FireworkItem.m_FadeColours[0]), a_FireworkItem.m_FadeColours.size());
+				a_Writer.AddIntArray("FadeColors", a_FireworkItem.m_FadeColours.data(), a_FireworkItem.m_FadeColours.size());
 			}
 			a_Writer.EndCompound();
 			a_Writer.EndList();
@@ -41,11 +41,11 @@ void cFireworkItem::WriteToNBTCompound(const cFireworkItem & a_FireworkItem, cFa
 			a_Writer.AddByte("Type", a_FireworkItem.m_Type);
 			if (!a_FireworkItem.m_Colours.empty())
 			{
-				a_Writer.AddIntArray("Colors", &(a_FireworkItem.m_Colours[0]), a_FireworkItem.m_Colours.size());
+				a_Writer.AddIntArray("Colors", a_FireworkItem.m_Colours.data(), a_FireworkItem.m_Colours.size());
 			}
 			if (!a_FireworkItem.m_FadeColours.empty())
 			{
-				a_Writer.AddIntArray("FadeColors", &(a_FireworkItem.m_FadeColours[0]), a_FireworkItem.m_FadeColours.size());
+				a_Writer.AddIntArray("FadeColors", a_FireworkItem.m_FadeColours.data(), a_FireworkItem.m_FadeColours.size());
 			}
 			a_Writer.EndCompound();
 			break;
diff --git a/src/WorldStorage/MapSerializer.cpp b/src/WorldStorage/MapSerializer.cpp
index 4a913c81a..f2d35b318 100644
--- a/src/WorldStorage/MapSerializer.cpp
+++ b/src/WorldStorage/MapSerializer.cpp
@@ -112,7 +112,7 @@ void cMapSerializer::SaveMapToNBT(cFastNBTWriter & a_Writer)
 	a_Writer.AddInt("zCenter", m_Map->GetCenterZ());
 
 	const cMap::cColorList & Data = m_Map->GetData();
-	a_Writer.AddByteArray("colors", (char *) &Data[0], Data.size());
+	a_Writer.AddByteArray("colors", (char *)Data.data(), Data.size());
 
 	a_Writer.EndCompound();
 }
@@ -190,7 +190,7 @@ bool cMapSerializer::LoadMapFromNBT(const cParsedNBT & a_NBT)
 	CurrLine = a_NBT.FindChildByName(Data, "colors");
 	if ((CurrLine >= 0) && (a_NBT.GetType(CurrLine) == TAG_ByteArray))
 	{
-		memcpy(&m_Map->m_Data[0], a_NBT.GetData(CurrLine), NumPixels);
+		memcpy(m_Map->m_Data.data(), a_NBT.GetData(CurrLine), NumPixels);
 	}
 
 	return true;
diff --git a/src/WorldStorage/NBTChunkSerializer.cpp b/src/WorldStorage/NBTChunkSerializer.cpp
index d85a5c329..432e122b5 100644
--- a/src/WorldStorage/NBTChunkSerializer.cpp
+++ b/src/WorldStorage/NBTChunkSerializer.cpp
@@ -18,6 +18,7 @@
 #include "../BlockEntities/FurnaceEntity.h"
 #include "../BlockEntities/HopperEntity.h"
 #include "../BlockEntities/JukeboxEntity.h"
+#include "../BlockEntities/MobSpawnerEntity.h"
 #include "../BlockEntities/NoteEntity.h"
 #include "../BlockEntities/SignEntity.h"
 #include "../BlockEntities/MobHeadEntity.h"
@@ -290,6 +291,20 @@ void cNBTChunkSerializer::AddJukeboxEntity(cJukeboxEntity * a_Jukebox)
 
 
 
+void cNBTChunkSerializer::AddMobSpawnerEntity(cMobSpawnerEntity * a_MobSpawner)
+{
+	m_Writer.BeginCompound("");
+		AddBasicTileEntity(a_MobSpawner, "MobSpawner");
+		m_Writer.AddShort("Entity", static_cast<short>(a_MobSpawner->GetEntity()));
+		m_Writer.AddString("EntityId", cMonster::MobTypeToVanillaName(a_MobSpawner->GetEntity()));
+		m_Writer.AddShort("Delay", a_MobSpawner->GetSpawnDelay());
+	m_Writer.EndCompound();
+}
+
+
+
+
+
 void cNBTChunkSerializer::AddNoteEntity(cNoteEntity * a_Note)
 {
 	m_Writer.BeginCompound("");
@@ -604,6 +619,28 @@ void cNBTChunkSerializer::AddMonsterEntity(cMonster * a_Monster)
 				m_Writer.AddByte("IsConverting", (((const cZombie *)a_Monster)->IsConverting() ? 1 : 0));
 				break;
 			}
+			case mtInvalidType:
+			case mtBlaze:
+			case mtCaveSpider:
+			case mtChicken:
+			case mtCow:
+			case mtEnderDragon:
+			case mtGhast:
+			case mtGiant:
+			case mtIronGolem:
+			case mtMooshroom:
+			case mtOcelot:
+			case mtPig:
+			case mtSilverfish:
+			case mtSnowGolem:
+			case mtSpider:
+			case mtSquid:
+			case mtWitch:
+			case mtZombiePigman:
+			{
+				// Other mobs have no special tags.
+				break;
+			}
 		}
 	m_Writer.EndCompound();
 }
@@ -892,6 +929,7 @@ void cNBTChunkSerializer::BlockEntity(cBlockEntity * a_Entity)
 		case E_BLOCK_HOPPER:        AddHopperEntity      ((cHopperEntity *)      a_Entity); break;
 		case E_BLOCK_JUKEBOX:       AddJukeboxEntity     ((cJukeboxEntity *)     a_Entity); break;
 		case E_BLOCK_LIT_FURNACE:   AddFurnaceEntity     ((cFurnaceEntity *)     a_Entity); break;
+		case E_BLOCK_MOB_SPAWNER:   AddMobSpawnerEntity  ((cMobSpawnerEntity *)  a_Entity); break;
 		case E_BLOCK_NOTE_BLOCK:    AddNoteEntity        ((cNoteEntity *)        a_Entity); break;
 		case E_BLOCK_SIGN_POST:     AddSignEntity        ((cSignEntity *)        a_Entity); break;
 		case E_BLOCK_TRAPPED_CHEST: AddChestEntity       ((cChestEntity *)       a_Entity, a_Entity->GetBlockType()); break;
diff --git a/src/WorldStorage/NBTChunkSerializer.h b/src/WorldStorage/NBTChunkSerializer.h
index 5ffab8cc5..4c066b9af 100644
--- a/src/WorldStorage/NBTChunkSerializer.h
+++ b/src/WorldStorage/NBTChunkSerializer.h
@@ -32,6 +32,7 @@ class cJukeboxEntity;
 class cNoteEntity;
 class cSignEntity;
 class cMobHeadEntity;
+class cMobSpawnerEntity;
 class cFlowerPotEntity;
 class cFallingBlock;
 class cMinecart;
@@ -94,19 +95,20 @@ protected:
 	void AddItemGrid(const cItemGrid & a_Grid, int a_BeginSlotNum = 0);
 	
 	// Block entities:
-	void AddBasicTileEntity(cBlockEntity *     a_Entity, const char * a_EntityTypeID);
-	void AddBeaconEntity   (cBeaconEntity *    a_Entity);
-	void AddChestEntity    (cChestEntity *     a_Entity, BLOCKTYPE a_ChestType);
-	void AddDispenserEntity(cDispenserEntity * a_Entity);
-	void AddDropperEntity  (cDropperEntity *   a_Entity);
-	void AddFurnaceEntity  (cFurnaceEntity *   a_Furnace);
-	void AddHopperEntity   (cHopperEntity *    a_Entity);
-	void AddJukeboxEntity  (cJukeboxEntity *   a_Jukebox);
-	void AddNoteEntity     (cNoteEntity *      a_Note);
-	void AddSignEntity     (cSignEntity *      a_Sign);
-	void AddMobHeadEntity  (cMobHeadEntity *     a_MobHead);
+	void AddBasicTileEntity   (cBlockEntity *        a_Entity, const char * a_EntityTypeID);
+	void AddBeaconEntity      (cBeaconEntity *       a_Entity);
+	void AddChestEntity       (cChestEntity *        a_Entity, BLOCKTYPE a_ChestType);
+	void AddDispenserEntity   (cDispenserEntity *    a_Entity);
+	void AddDropperEntity     (cDropperEntity *      a_Entity);
+	void AddFurnaceEntity     (cFurnaceEntity *      a_Furnace);
+	void AddHopperEntity      (cHopperEntity *       a_Entity);
+	void AddJukeboxEntity     (cJukeboxEntity *      a_Jukebox);
+	void AddMobSpawnerEntity  (cMobSpawnerEntity *   a_MobSpawner);
+	void AddNoteEntity        (cNoteEntity *         a_Note);
+	void AddSignEntity        (cSignEntity *         a_Sign);
+	void AddMobHeadEntity     (cMobHeadEntity *      a_MobHead);
 	void AddCommandBlockEntity(cCommandBlockEntity * a_CmdBlock);
-	void AddFlowerPotEntity(cFlowerPotEntity * a_FlowerPot);
+	void AddFlowerPotEntity   (cFlowerPotEntity *    a_FlowerPot);
 	
 	// Entities:
 	void AddBasicEntity       (cEntity * a_Entity, const AString & a_ClassName);
diff --git a/src/WorldStorage/WSSAnvil.cpp b/src/WorldStorage/WSSAnvil.cpp
index af7551ee4..af65db700 100644..100755
--- a/src/WorldStorage/WSSAnvil.cpp
+++ b/src/WorldStorage/WSSAnvil.cpp
@@ -28,6 +28,7 @@
 #include "../BlockEntities/NoteEntity.h"
 #include "../BlockEntities/SignEntity.h"
 #include "../BlockEntities/MobHeadEntity.h"
+#include "../BlockEntities/MobSpawnerEntity.h"
 #include "../BlockEntities/FlowerPotEntity.h"
 
 #include "../Mobs/Monster.h"
@@ -630,7 +631,7 @@ void cWSSAnvil::LoadBlockEntitiesFromNBT(cBlockEntityList & a_BlockEntities, con
 		// Load the proper BlockEntity type based on the block type:
 		BLOCKTYPE BlockType = cChunkDef::GetBlock(a_BlockTypes, RelX, RelY, RelZ);
 		NIBBLETYPE BlockMeta = cChunkDef::GetNibble(a_BlockMetas, RelX, RelY, RelZ);
-		std::auto_ptr<cBlockEntity> be(LoadBlockEntityFromNBT(a_NBT, Child, x, y, z, BlockType, BlockMeta));
+		std::unique_ptr<cBlockEntity> be(LoadBlockEntityFromNBT(a_NBT, Child, x, y, z, BlockType, BlockMeta));
 		if (be.get() == nullptr)
 		{
 			continue;
@@ -664,6 +665,7 @@ cBlockEntity * cWSSAnvil::LoadBlockEntityFromNBT(const cParsedNBT & a_NBT, int a
 		case E_BLOCK_HOPPER:        return LoadHopperFromNBT      (a_NBT, a_Tag, a_BlockX, a_BlockY, a_BlockZ);
 		case E_BLOCK_JUKEBOX:       return LoadJukeboxFromNBT     (a_NBT, a_Tag, a_BlockX, a_BlockY, a_BlockZ);
 		case E_BLOCK_LIT_FURNACE:   return LoadFurnaceFromNBT     (a_NBT, a_Tag, a_BlockX, a_BlockY, a_BlockZ, E_BLOCK_LIT_FURNACE, a_BlockMeta);
+		case E_BLOCK_MOB_SPAWNER:   return LoadMobSpawnerFromNBT  (a_NBT, a_Tag, a_BlockX, a_BlockY, a_BlockZ);
 		case E_BLOCK_NOTE_BLOCK:    return LoadNoteBlockFromNBT   (a_NBT, a_Tag, a_BlockX, a_BlockY, a_BlockZ);
 		case E_BLOCK_SIGN_POST:     return LoadSignFromNBT        (a_NBT, a_Tag, a_BlockX, a_BlockY, a_BlockZ, E_BLOCK_SIGN_POST);
 		case E_BLOCK_TRAPPED_CHEST: return LoadChestFromNBT       (a_NBT, a_Tag, a_BlockX, a_BlockY, a_BlockZ, E_BLOCK_TRAPPED_CHEST);
@@ -696,11 +698,28 @@ cBlockEntity * cWSSAnvil::LoadBlockEntityFromNBT(const cParsedNBT & a_NBT, int a
 bool cWSSAnvil::LoadItemFromNBT(cItem & a_Item, const cParsedNBT & a_NBT, int a_TagIdx)
 {
 	int Type = a_NBT.FindChildByName(a_TagIdx, "id");
-	if ((Type < 0) || (a_NBT.GetType(Type) != TAG_Short))
+	if (Type <= 0)
 	{
 		return false;
 	}
-	a_Item.m_ItemType = a_NBT.GetShort(Type);
+
+	if (a_NBT.GetType(Type) == TAG_String)
+	{
+		if (!StringToItem(a_NBT.GetString(Type), a_Item))
+		{
+			// Can't resolve item type
+			return false;
+		}
+	}
+	else if (a_NBT.GetType(Type) == TAG_Short)
+	{
+		a_Item.m_ItemType = a_NBT.GetShort(Type);
+	}
+	else
+	{
+		return false;
+	}
+
 	if (a_Item.m_ItemType < 0)
 	{
 		a_Item.Empty();
@@ -839,7 +858,7 @@ cBlockEntity * cWSSAnvil::LoadBeaconFromNBT(const cParsedNBT & a_NBT, int a_TagI
 		return nullptr;
 	}
 
-	std::auto_ptr<cBeaconEntity> Beacon(new cBeaconEntity(a_BlockX, a_BlockY, a_BlockZ, m_World));
+	std::unique_ptr<cBeaconEntity> Beacon(new cBeaconEntity(a_BlockX, a_BlockY, a_BlockZ, m_World));
 
 	int CurrentLine = a_NBT.FindChildByName(a_TagIdx, "Levels");
 	if (CurrentLine >= 0)
@@ -889,7 +908,7 @@ cBlockEntity * cWSSAnvil::LoadChestFromNBT(const cParsedNBT & a_NBT, int a_TagId
 	{
 		return nullptr;  // Make it an empty chest - the chunk loader will provide an empty cChestEntity for this
 	}
-	std::auto_ptr<cChestEntity> Chest(new cChestEntity(a_BlockX, a_BlockY, a_BlockZ, m_World, a_ChestBlockType));
+	std::unique_ptr<cChestEntity> Chest(new cChestEntity(a_BlockX, a_BlockY, a_BlockZ, m_World, a_ChestBlockType));
 	LoadItemGridFromNBT(Chest->GetContents(), a_NBT, Items);
 	return Chest.release();
 }
@@ -906,7 +925,7 @@ cBlockEntity * cWSSAnvil::LoadCommandBlockFromNBT(const cParsedNBT & a_NBT, int
 		return nullptr;
 	}
 
-	std::auto_ptr<cCommandBlockEntity> CmdBlock(new cCommandBlockEntity(a_BlockX, a_BlockY, a_BlockZ, m_World));
+	std::unique_ptr<cCommandBlockEntity> CmdBlock(new cCommandBlockEntity(a_BlockX, a_BlockY, a_BlockZ, m_World));
 
 	int currentLine = a_NBT.FindChildByName(a_TagIdx, "Command");
 	if (currentLine >= 0)
@@ -948,7 +967,7 @@ cBlockEntity * cWSSAnvil::LoadDispenserFromNBT(const cParsedNBT & a_NBT, int a_T
 	{
 		return nullptr;  // Make it an empty dispenser - the chunk loader will provide an empty cDispenserEntity for this
 	}
-	std::auto_ptr<cDispenserEntity> Dispenser(new cDispenserEntity(a_BlockX, a_BlockY, a_BlockZ, m_World));
+	std::unique_ptr<cDispenserEntity> Dispenser(new cDispenserEntity(a_BlockX, a_BlockY, a_BlockZ, m_World));
 	LoadItemGridFromNBT(Dispenser->GetContents(), a_NBT, Items);
 	return Dispenser.release();
 }
@@ -970,7 +989,7 @@ cBlockEntity * cWSSAnvil::LoadDropperFromNBT(const cParsedNBT & a_NBT, int a_Tag
 	{
 		return nullptr;  // Make it an empty dropper - the chunk loader will provide an empty cDropperEntity for this
 	}
-	std::auto_ptr<cDropperEntity> Dropper(new cDropperEntity(a_BlockX, a_BlockY, a_BlockZ, m_World));
+	std::unique_ptr<cDropperEntity> Dropper(new cDropperEntity(a_BlockX, a_BlockY, a_BlockZ, m_World));
 	LoadItemGridFromNBT(Dropper->GetContents(), a_NBT, Items);
 	return Dropper.release();
 }
@@ -987,7 +1006,7 @@ cBlockEntity * cWSSAnvil::LoadFlowerPotFromNBT(const cParsedNBT & a_NBT, int a_T
 		return nullptr;
 	}
 
-	std::auto_ptr<cFlowerPotEntity> FlowerPot(new cFlowerPotEntity(a_BlockX, a_BlockY, a_BlockZ, m_World));
+	std::unique_ptr<cFlowerPotEntity> FlowerPot(new cFlowerPotEntity(a_BlockX, a_BlockY, a_BlockZ, m_World));
 	short ItemType = 0, ItemData = 0;
 
 	int currentLine = a_NBT.FindChildByName(a_TagIdx, "Item");
@@ -1024,7 +1043,7 @@ cBlockEntity * cWSSAnvil::LoadFurnaceFromNBT(const cParsedNBT & a_NBT, int a_Tag
 		return nullptr;  // Make it an empty furnace - the chunk loader will provide an empty cFurnaceEntity for this
 	}
 	
-	std::auto_ptr<cFurnaceEntity> Furnace(new cFurnaceEntity(a_BlockX, a_BlockY, a_BlockZ, a_BlockType, a_BlockMeta, m_World));
+	std::unique_ptr<cFurnaceEntity> Furnace(new cFurnaceEntity(a_BlockX, a_BlockY, a_BlockZ, a_BlockType, a_BlockMeta, m_World));
 	
 	// Load slots:
 	for (int Child = a_NBT.GetFirstChild(Items); Child != -1; Child = a_NBT.GetNextSibling(Child))
@@ -1068,6 +1087,54 @@ cBlockEntity * cWSSAnvil::LoadFurnaceFromNBT(const cParsedNBT & a_NBT, int a_Tag
 
 
 
+cBlockEntity * cWSSAnvil::LoadMobSpawnerFromNBT(const cParsedNBT & a_NBT, int a_TagIdx, int a_BlockX, int a_BlockY, int a_BlockZ)
+{
+	// Check if the data has a proper type:
+	if (!CheckBlockEntityType(a_NBT, a_TagIdx, "MobSpawner"))
+	{
+		return nullptr;
+	}
+
+	std::unique_ptr<cMobSpawnerEntity> MobSpawner(new cMobSpawnerEntity(a_BlockX, a_BlockY, a_BlockZ, m_World));
+
+	// Load entity (MCServer worlds):
+	int Type = a_NBT.FindChildByName(a_TagIdx, "Entity");
+	if ((Type >= 0) && (a_NBT.GetType(Type) == TAG_Short))
+	{
+		short MonsterType = a_NBT.GetShort(Type);
+		if ((MonsterType >= 50) && (MonsterType <= 120))
+		{
+			MobSpawner->SetEntity(static_cast<eMonsterType>(MonsterType));
+		}
+	}
+	else
+	{
+		// Load entity (vanilla worlds):
+		Type = a_NBT.FindChildByName(a_TagIdx, "EntityId");
+		if ((Type >= 0) && (a_NBT.GetType(Type) == TAG_String))
+		{
+			eMonsterType MonsterType = cMonster::StringToMobType(a_NBT.GetString(Type));
+			if (MonsterType != eMonsterType::mtInvalidType)
+			{
+				MobSpawner->SetEntity(MonsterType);
+			}
+		}
+	}
+
+	// Load delay:
+	int Delay = a_NBT.FindChildByName(a_TagIdx, "Delay");
+	if ((Delay >= 0) && (a_NBT.GetType(Delay) == TAG_Short))
+	{
+		MobSpawner->SetSpawnDelay(a_NBT.GetShort(Delay));
+	}
+
+	return MobSpawner.release();
+}
+
+
+
+
+
 cBlockEntity * cWSSAnvil::LoadHopperFromNBT(const cParsedNBT & a_NBT, int a_TagIdx, int a_BlockX, int a_BlockY, int a_BlockZ)
 {
 	// Check if the data has a proper type:
@@ -1081,7 +1148,7 @@ cBlockEntity * cWSSAnvil::LoadHopperFromNBT(const cParsedNBT & a_NBT, int a_TagI
 	{
 		return nullptr;  // Make it an empty hopper - the chunk loader will provide an empty cHopperEntity for this
 	}
-	std::auto_ptr<cHopperEntity> Hopper(new cHopperEntity(a_BlockX, a_BlockY, a_BlockZ, m_World));
+	std::unique_ptr<cHopperEntity> Hopper(new cHopperEntity(a_BlockX, a_BlockY, a_BlockZ, m_World));
 	LoadItemGridFromNBT(Hopper->GetContents(), a_NBT, Items);
 	return Hopper.release();
 }
@@ -1098,7 +1165,7 @@ cBlockEntity * cWSSAnvil::LoadJukeboxFromNBT(const cParsedNBT & a_NBT, int a_Tag
 		return nullptr;
 	}
 
-	std::auto_ptr<cJukeboxEntity> Jukebox(new cJukeboxEntity(a_BlockX, a_BlockY, a_BlockZ, m_World));
+	std::unique_ptr<cJukeboxEntity> Jukebox(new cJukeboxEntity(a_BlockX, a_BlockY, a_BlockZ, m_World));
 	int Record = a_NBT.FindChildByName(a_TagIdx, "Record");
 	if (Record >= 0)
 	{
@@ -1119,7 +1186,7 @@ cBlockEntity * cWSSAnvil::LoadMobHeadFromNBT(const cParsedNBT & a_NBT, int a_Tag
 		return nullptr;
 	}
 
-	std::auto_ptr<cMobHeadEntity> MobHead(new cMobHeadEntity(a_BlockX, a_BlockY, a_BlockZ, m_World));
+	std::unique_ptr<cMobHeadEntity> MobHead(new cMobHeadEntity(a_BlockX, a_BlockY, a_BlockZ, m_World));
 
 	int currentLine = a_NBT.FindChildByName(a_TagIdx, "SkullType");
 	if (currentLine >= 0)
@@ -1154,7 +1221,7 @@ cBlockEntity * cWSSAnvil::LoadNoteBlockFromNBT(const cParsedNBT & a_NBT, int a_T
 		return nullptr;
 	}
 
-	std::auto_ptr<cNoteEntity> NoteBlock(new cNoteEntity(a_BlockX, a_BlockY, a_BlockZ, m_World));
+	std::unique_ptr<cNoteEntity> NoteBlock(new cNoteEntity(a_BlockX, a_BlockY, a_BlockZ, m_World));
 	int note = a_NBT.FindChildByName(a_TagIdx, "note");
 	if (note >= 0)
 	{
@@ -1175,7 +1242,7 @@ cBlockEntity * cWSSAnvil::LoadSignFromNBT(const cParsedNBT & a_NBT, int a_TagIdx
 		return nullptr;
 	}
 
-	std::auto_ptr<cSignEntity> Sign(new cSignEntity(a_BlockType, a_BlockX, a_BlockY, a_BlockZ, m_World));
+	std::unique_ptr<cSignEntity> Sign(new cSignEntity(a_BlockType, a_BlockX, a_BlockY, a_BlockZ, m_World));
 
 	int currentLine = a_NBT.FindChildByName(a_TagIdx, "Text1");
 	if (currentLine >= 0)
@@ -1428,7 +1495,7 @@ void cWSSAnvil::LoadEntityFromNBT(cEntityList & a_Entities, const cParsedNBT & a
 
 void cWSSAnvil::LoadBoatFromNBT(cEntityList & a_Entities, const cParsedNBT & a_NBT, int a_TagIdx)
 {
-	std::auto_ptr<cBoat> Boat(new cBoat(0, 0, 0));
+	std::unique_ptr<cBoat> Boat(new cBoat(0, 0, 0));
 	if (!LoadEntityBaseFromNBT(*Boat.get(), a_NBT, a_TagIdx))
 	{
 		return;
@@ -1442,7 +1509,7 @@ void cWSSAnvil::LoadBoatFromNBT(cEntityList & a_Entities, const cParsedNBT & a_N
 
 void cWSSAnvil::LoadEnderCrystalFromNBT(cEntityList & a_Entities, const cParsedNBT & a_NBT, int a_TagIdx)
 {
-	std::auto_ptr<cEnderCrystal> EnderCrystal(new cEnderCrystal(0, 0, 0));
+	std::unique_ptr<cEnderCrystal> EnderCrystal(new cEnderCrystal(0, 0, 0));
 	if (!LoadEntityBaseFromNBT(*EnderCrystal.get(), a_NBT, a_TagIdx))
 	{
 		return;
@@ -1459,12 +1526,15 @@ void cWSSAnvil::LoadFallingBlockFromNBT(cEntityList & a_Entities, const cParsedN
 	int TypeIdx = a_NBT.FindChildByName(a_TagIdx, "TileID");
 	int MetaIdx = a_NBT.FindChildByName(a_TagIdx, "Data");
 
-	if ((TypeIdx < 0) || (MetaIdx < 0)) { return; }
+	if ((TypeIdx < 0) || (MetaIdx < 0))
+	{
+		return;
+	}
 
 	int Type = a_NBT.GetInt(TypeIdx);
 	NIBBLETYPE Meta = (NIBBLETYPE)a_NBT.GetByte(MetaIdx);
 
-	std::auto_ptr<cFallingBlock> FallingBlock(new cFallingBlock(Vector3i(0, 0, 0), Type, Meta));
+	std::unique_ptr<cFallingBlock> FallingBlock(new cFallingBlock(Vector3i(0, 0, 0), Type, Meta));
 	if (!LoadEntityBaseFromNBT(*FallingBlock.get(), a_NBT, a_TagIdx))
 	{
 		return;
@@ -1478,7 +1548,7 @@ void cWSSAnvil::LoadFallingBlockFromNBT(cEntityList & a_Entities, const cParsedN
 
 void cWSSAnvil::LoadMinecartRFromNBT(cEntityList & a_Entities, const cParsedNBT & a_NBT, int a_TagIdx)
 {
-	std::auto_ptr<cRideableMinecart> Minecart(new cRideableMinecart(0, 0, 0, cItem(), 1));  // TODO: Load the block and the height
+	std::unique_ptr<cRideableMinecart> Minecart(new cRideableMinecart(0, 0, 0, cItem(), 1));  // TODO: Load the block and the height
 	if (!LoadEntityBaseFromNBT(*Minecart.get(), a_NBT, a_TagIdx))
 	{
 		return;
@@ -1497,7 +1567,7 @@ void cWSSAnvil::LoadMinecartCFromNBT(cEntityList & a_Entities, const cParsedNBT
 	{
 		return;  // Make it an empty chest - the chunk loader will provide an empty cChestEntity for this
 	}
-	std::auto_ptr<cMinecartWithChest> Minecart(new cMinecartWithChest(0, 0, 0));
+	std::unique_ptr<cMinecartWithChest> Minecart(new cMinecartWithChest(0, 0, 0));
 	if (!LoadEntityBaseFromNBT(*Minecart.get(), a_NBT, a_TagIdx))
 	{
 		return;
@@ -1524,7 +1594,7 @@ void cWSSAnvil::LoadMinecartCFromNBT(cEntityList & a_Entities, const cParsedNBT
 
 void cWSSAnvil::LoadMinecartFFromNBT(cEntityList & a_Entities, const cParsedNBT & a_NBT, int a_TagIdx)
 {
-	std::auto_ptr<cMinecartWithFurnace> Minecart(new cMinecartWithFurnace(0, 0, 0));
+	std::unique_ptr<cMinecartWithFurnace> Minecart(new cMinecartWithFurnace(0, 0, 0));
 	if (!LoadEntityBaseFromNBT(*Minecart.get(), a_NBT, a_TagIdx))
 	{
 		return;
@@ -1541,7 +1611,7 @@ void cWSSAnvil::LoadMinecartFFromNBT(cEntityList & a_Entities, const cParsedNBT
 
 void cWSSAnvil::LoadMinecartTFromNBT(cEntityList & a_Entities, const cParsedNBT & a_NBT, int a_TagIdx)
 {
-	std::auto_ptr<cMinecartWithTNT> Minecart(new cMinecartWithTNT(0, 0, 0));
+	std::unique_ptr<cMinecartWithTNT> Minecart(new cMinecartWithTNT(0, 0, 0));
 	if (!LoadEntityBaseFromNBT(*Minecart.get(), a_NBT, a_TagIdx))
 	{
 		return;
@@ -1558,7 +1628,7 @@ void cWSSAnvil::LoadMinecartTFromNBT(cEntityList & a_Entities, const cParsedNBT
 
 void cWSSAnvil::LoadMinecartHFromNBT(cEntityList & a_Entities, const cParsedNBT & a_NBT, int a_TagIdx)
 {
-	std::auto_ptr<cMinecartWithHopper> Minecart(new cMinecartWithHopper(0, 0, 0));
+	std::unique_ptr<cMinecartWithHopper> Minecart(new cMinecartWithHopper(0, 0, 0));
 	if (!LoadEntityBaseFromNBT(*Minecart.get(), a_NBT, a_TagIdx))
 	{
 		return;
@@ -1587,7 +1657,7 @@ void cWSSAnvil::LoadPickupFromNBT(cEntityList & a_Entities, const cParsedNBT & a
 		return;
 	}
 	
-	std::auto_ptr<cPickup> Pickup(new cPickup(0, 0, 0, Item, false));  // Pickup delay doesn't matter, just say false
+	std::unique_ptr<cPickup> Pickup(new cPickup(0, 0, 0, Item, false));  // Pickup delay doesn't matter, just say false
 	if (!LoadEntityBaseFromNBT(*Pickup.get(), a_NBT, a_TagIdx))
 	{
 		return;
@@ -1609,7 +1679,7 @@ void cWSSAnvil::LoadPickupFromNBT(cEntityList & a_Entities, const cParsedNBT & a
 
 void cWSSAnvil::LoadTNTFromNBT(cEntityList & a_Entities, const cParsedNBT & a_NBT, int a_TagIdx)
 {
-	std::auto_ptr<cTNTEntity> TNT(new cTNTEntity(0.0, 0.0, 0.0, 0));
+	std::unique_ptr<cTNTEntity> TNT(new cTNTEntity(0.0, 0.0, 0.0, 0));
 	if (!LoadEntityBaseFromNBT(*TNT.get(), a_NBT, a_TagIdx))
 	{
 		return;
@@ -1631,7 +1701,7 @@ void cWSSAnvil::LoadTNTFromNBT(cEntityList & a_Entities, const cParsedNBT & a_NB
 
 void cWSSAnvil::LoadExpOrbFromNBT(cEntityList & a_Entities, const cParsedNBT & a_NBT, int a_TagIdx)
 {
-	std::auto_ptr<cExpOrb> ExpOrb(new cExpOrb(0.0, 0.0, 0.0, 0));
+	std::unique_ptr<cExpOrb> ExpOrb(new cExpOrb(0.0, 0.0, 0.0, 0));
 	if (!LoadEntityBaseFromNBT(*ExpOrb.get(), a_NBT, a_TagIdx))
 	{
 		return;
@@ -1730,7 +1800,7 @@ void cWSSAnvil::LoadItemFrameFromNBT(cEntityList & a_Entities, const cParsedNBT
 		return;
 	}
 	
-	std::auto_ptr<cItemFrame> ItemFrame(new cItemFrame(BLOCK_FACE_NONE, 0.0, 0.0, 0.0));
+	std::unique_ptr<cItemFrame> ItemFrame(new cItemFrame(BLOCK_FACE_NONE, 0.0, 0.0, 0.0));
 	if (!LoadEntityBaseFromNBT(*ItemFrame.get(), a_NBT, a_TagIdx))
 	{
 		return;
@@ -1755,7 +1825,7 @@ void cWSSAnvil::LoadItemFrameFromNBT(cEntityList & a_Entities, const cParsedNBT
 
 void cWSSAnvil::LoadArrowFromNBT(cEntityList & a_Entities, const cParsedNBT & a_NBT, int a_TagIdx)
 {
-	std::auto_ptr<cArrowEntity> Arrow(new cArrowEntity(nullptr, 0, 0, 0, Vector3d(0, 0, 0)));
+	std::unique_ptr<cArrowEntity> Arrow(new cArrowEntity(nullptr, 0, 0, 0, Vector3d(0, 0, 0)));
 	if (!LoadProjectileBaseFromNBT(*Arrow.get(), a_NBT, a_TagIdx))
 	{
 		return;
@@ -1790,9 +1860,10 @@ void cWSSAnvil::LoadArrowFromNBT(cEntityList & a_Entities, const cParsedNBT & a_
 	int InBlockZIdx = a_NBT.FindChildByName(a_TagIdx, "zTile");
 	if ((InBlockXIdx > 0) && (InBlockYIdx > 0) && (InBlockZIdx > 0))
 	{
-		if (a_NBT.GetType(InBlockXIdx) == a_NBT.GetType(InBlockYIdx) == a_NBT.GetType(InBlockZIdx))
+		eTagType typeX = a_NBT.GetType(InBlockXIdx);
+		if ((typeX == a_NBT.GetType(InBlockYIdx)) &&  (typeX == a_NBT.GetType(InBlockZIdx)))
 		{
-			switch (a_NBT.GetType(InBlockXIdx))
+			switch (typeX)
 			{
 				case TAG_Int:
 				{
@@ -1806,6 +1877,11 @@ void cWSSAnvil::LoadArrowFromNBT(cEntityList & a_Entities, const cParsedNBT & a_
 					Arrow->SetBlockHit(Vector3i((int)a_NBT.GetShort(InBlockXIdx), (int)a_NBT.GetShort(InBlockYIdx), (int)a_NBT.GetShort(InBlockZIdx)));
 					break;
 				}
+				default:
+				{
+					// No hit block, the arrow is still flying?
+					break;
+				}
 			}
 		}
 	}
@@ -1819,7 +1895,7 @@ void cWSSAnvil::LoadArrowFromNBT(cEntityList & a_Entities, const cParsedNBT & a_
 
 void cWSSAnvil::LoadSplashPotionFromNBT(cEntityList & a_Entities, const cParsedNBT & a_NBT, int a_TagIdx)
 {
-	std::auto_ptr<cSplashPotionEntity> SplashPotion(new cSplashPotionEntity(nullptr, 0, 0, 0, Vector3d(0, 0, 0), cItem()));
+	std::unique_ptr<cSplashPotionEntity> SplashPotion(new cSplashPotionEntity(nullptr, 0, 0, 0, Vector3d(0, 0, 0), cItem()));
 	if (!LoadProjectileBaseFromNBT(*SplashPotion.get(), a_NBT, a_TagIdx))
 	{
 		return;
@@ -1843,7 +1919,7 @@ void cWSSAnvil::LoadSplashPotionFromNBT(cEntityList & a_Entities, const cParsedN
 
 void cWSSAnvil::LoadSnowballFromNBT(cEntityList & a_Entities, const cParsedNBT & a_NBT, int a_TagIdx)
 {
-	std::auto_ptr<cThrownSnowballEntity> Snowball(new cThrownSnowballEntity(nullptr, 0, 0, 0, Vector3d(0, 0, 0)));
+	std::unique_ptr<cThrownSnowballEntity> Snowball(new cThrownSnowballEntity(nullptr, 0, 0, 0, Vector3d(0, 0, 0)));
 	if (!LoadProjectileBaseFromNBT(*Snowball.get(), a_NBT, a_TagIdx))
 	{
 		return;
@@ -1859,7 +1935,7 @@ void cWSSAnvil::LoadSnowballFromNBT(cEntityList & a_Entities, const cParsedNBT &
 
 void cWSSAnvil::LoadEggFromNBT(cEntityList & a_Entities, const cParsedNBT & a_NBT, int a_TagIdx)
 {
-	std::auto_ptr<cThrownEggEntity> Egg(new cThrownEggEntity(nullptr, 0, 0, 0, Vector3d(0, 0, 0)));
+	std::unique_ptr<cThrownEggEntity> Egg(new cThrownEggEntity(nullptr, 0, 0, 0, Vector3d(0, 0, 0)));
 	if (!LoadProjectileBaseFromNBT(*Egg.get(), a_NBT, a_TagIdx))
 	{
 		return;
@@ -1875,7 +1951,7 @@ void cWSSAnvil::LoadEggFromNBT(cEntityList & a_Entities, const cParsedNBT & a_NB
 
 void cWSSAnvil::LoadFireballFromNBT(cEntityList & a_Entities, const cParsedNBT & a_NBT, int a_TagIdx)
 {
-	std::auto_ptr<cGhastFireballEntity> Fireball(new cGhastFireballEntity(nullptr, 0, 0, 0, Vector3d(0, 0, 0)));
+	std::unique_ptr<cGhastFireballEntity> Fireball(new cGhastFireballEntity(nullptr, 0, 0, 0, Vector3d(0, 0, 0)));
 	if (!LoadProjectileBaseFromNBT(*Fireball.get(), a_NBT, a_TagIdx))
 	{
 		return;
@@ -1891,7 +1967,7 @@ void cWSSAnvil::LoadFireballFromNBT(cEntityList & a_Entities, const cParsedNBT &
 
 void cWSSAnvil::LoadFireChargeFromNBT(cEntityList & a_Entities, const cParsedNBT & a_NBT, int a_TagIdx)
 {
-	std::auto_ptr<cFireChargeEntity> FireCharge(new cFireChargeEntity(nullptr, 0, 0, 0, Vector3d(0, 0, 0)));
+	std::unique_ptr<cFireChargeEntity> FireCharge(new cFireChargeEntity(nullptr, 0, 0, 0, Vector3d(0, 0, 0)));
 	if (!LoadProjectileBaseFromNBT(*FireCharge.get(), a_NBT, a_TagIdx))
 	{
 		return;
@@ -1907,7 +1983,7 @@ void cWSSAnvil::LoadFireChargeFromNBT(cEntityList & a_Entities, const cParsedNBT
 
 void cWSSAnvil::LoadThrownEnderpearlFromNBT(cEntityList & a_Entities, const cParsedNBT & a_NBT, int a_TagIdx)
 {
-	std::auto_ptr<cThrownEnderPearlEntity> Enderpearl(new cThrownEnderPearlEntity(nullptr, 0, 0, 0, Vector3d(0, 0, 0)));
+	std::unique_ptr<cThrownEnderPearlEntity> Enderpearl(new cThrownEnderPearlEntity(nullptr, 0, 0, 0, Vector3d(0, 0, 0)));
 	if (!LoadProjectileBaseFromNBT(*Enderpearl.get(), a_NBT, a_TagIdx))
 	{
 		return;
@@ -1923,7 +1999,7 @@ void cWSSAnvil::LoadThrownEnderpearlFromNBT(cEntityList & a_Entities, const cPar
 
 void cWSSAnvil::LoadBatFromNBT(cEntityList & a_Entities, const cParsedNBT & a_NBT, int a_TagIdx)
 {
-	std::auto_ptr<cBat> Monster(new cBat());
+	std::unique_ptr<cBat> Monster(new cBat());
 	if (!LoadEntityBaseFromNBT(*Monster.get(), a_NBT, a_TagIdx))
 	{
 		return;
@@ -1943,7 +2019,7 @@ void cWSSAnvil::LoadBatFromNBT(cEntityList & a_Entities, const cParsedNBT & a_NB
 
 void cWSSAnvil::LoadBlazeFromNBT(cEntityList & a_Entities, const cParsedNBT & a_NBT, int a_TagIdx)
 {
-	std::auto_ptr<cBlaze> Monster(new cBlaze());
+	std::unique_ptr<cBlaze> Monster(new cBlaze());
 	if (!LoadEntityBaseFromNBT(*Monster.get(), a_NBT, a_TagIdx))
 	{
 		return;
@@ -1963,7 +2039,7 @@ void cWSSAnvil::LoadBlazeFromNBT(cEntityList & a_Entities, const cParsedNBT & a_
 
 void cWSSAnvil::LoadCaveSpiderFromNBT(cEntityList & a_Entities, const cParsedNBT & a_NBT, int a_TagIdx)
 {
-	std::auto_ptr<cCaveSpider> Monster(new cCaveSpider());
+	std::unique_ptr<cCaveSpider> Monster(new cCaveSpider());
 	if (!LoadEntityBaseFromNBT(*Monster.get(), a_NBT, a_TagIdx))
 	{
 		return;
@@ -1983,7 +2059,7 @@ void cWSSAnvil::LoadCaveSpiderFromNBT(cEntityList & a_Entities, const cParsedNBT
 
 void cWSSAnvil::LoadChickenFromNBT(cEntityList & a_Entities, const cParsedNBT & a_NBT, int a_TagIdx)
 {
-	std::auto_ptr<cChicken> Monster(new cChicken());
+	std::unique_ptr<cChicken> Monster(new cChicken());
 	if (!LoadEntityBaseFromNBT(*Monster.get(), a_NBT, a_TagIdx))
 	{
 		return;
@@ -2003,7 +2079,7 @@ void cWSSAnvil::LoadChickenFromNBT(cEntityList & a_Entities, const cParsedNBT &
 
 void cWSSAnvil::LoadCowFromNBT(cEntityList & a_Entities, const cParsedNBT & a_NBT, int a_TagIdx)
 {
-	std::auto_ptr<cCow> Monster(new cCow());
+	std::unique_ptr<cCow> Monster(new cCow());
 	if (!LoadEntityBaseFromNBT(*Monster.get(), a_NBT, a_TagIdx))
 	{
 		return;
@@ -2023,7 +2099,7 @@ void cWSSAnvil::LoadCowFromNBT(cEntityList & a_Entities, const cParsedNBT & a_NB
 
 void cWSSAnvil::LoadCreeperFromNBT(cEntityList & a_Entities, const cParsedNBT & a_NBT, int a_TagIdx)
 {
-	std::auto_ptr<cCreeper> Monster(new cCreeper());
+	std::unique_ptr<cCreeper> Monster(new cCreeper());
 	if (!LoadEntityBaseFromNBT(*Monster.get(), a_NBT, a_TagIdx))
 	{
 		return;
@@ -2043,7 +2119,7 @@ void cWSSAnvil::LoadCreeperFromNBT(cEntityList & a_Entities, const cParsedNBT &
 
 void cWSSAnvil::LoadEnderDragonFromNBT(cEntityList & a_Entities, const cParsedNBT & a_NBT, int a_TagIdx)
 {
-	std::auto_ptr<cEnderDragon> Monster(new cEnderDragon());
+	std::unique_ptr<cEnderDragon> Monster(new cEnderDragon());
 	if (!LoadEntityBaseFromNBT(*Monster.get(), a_NBT, a_TagIdx))
 	{
 		return;
@@ -2063,7 +2139,7 @@ void cWSSAnvil::LoadEnderDragonFromNBT(cEntityList & a_Entities, const cParsedNB
 
 void cWSSAnvil::LoadEndermanFromNBT(cEntityList & a_Entities, const cParsedNBT & a_NBT, int a_TagIdx)
 {
-	std::auto_ptr<cEnderman> Monster(new cEnderman());
+	std::unique_ptr<cEnderman> Monster(new cEnderman());
 	if (!LoadEntityBaseFromNBT(*Monster.get(), a_NBT, a_TagIdx))
 	{
 		return;
@@ -2083,7 +2159,7 @@ void cWSSAnvil::LoadEndermanFromNBT(cEntityList & a_Entities, const cParsedNBT &
 
 void cWSSAnvil::LoadGhastFromNBT(cEntityList & a_Entities, const cParsedNBT & a_NBT, int a_TagIdx)
 {
-	std::auto_ptr<cGhast> Monster(new cGhast());
+	std::unique_ptr<cGhast> Monster(new cGhast());
 	if (!LoadEntityBaseFromNBT(*Monster.get(), a_NBT, a_TagIdx))
 	{
 		return;
@@ -2103,7 +2179,7 @@ void cWSSAnvil::LoadGhastFromNBT(cEntityList & a_Entities, const cParsedNBT & a_
 
 void cWSSAnvil::LoadGiantFromNBT(cEntityList & a_Entities, const cParsedNBT & a_NBT, int a_TagIdx)
 {
-	std::auto_ptr<cGiant> Monster(new cGiant());
+	std::unique_ptr<cGiant> Monster(new cGiant());
 	if (!LoadEntityBaseFromNBT(*Monster.get(), a_NBT, a_TagIdx))
 	{
 		return;
@@ -2123,17 +2199,19 @@ void cWSSAnvil::LoadGiantFromNBT(cEntityList & a_Entities, const cParsedNBT & a_
 
 void cWSSAnvil::LoadHorseFromNBT(cEntityList & a_Entities, const cParsedNBT & a_NBT, int a_TagIdx)
 {
-	int TypeIdx = a_NBT.FindChildByName(a_TagIdx, "Type");
+	int TypeIdx  = a_NBT.FindChildByName(a_TagIdx, "Type");
 	int ColorIdx = a_NBT.FindChildByName(a_TagIdx, "Color");
 	int StyleIdx = a_NBT.FindChildByName(a_TagIdx, "Style");
-
-	if ((TypeIdx < 0) || (ColorIdx < 0) || (StyleIdx < 0)) { return; }
+	if ((TypeIdx < 0) || (ColorIdx < 0) || (StyleIdx < 0))
+	{
+		return;
+	}
 
 	int Type = a_NBT.GetInt(TypeIdx);
 	int Color = a_NBT.GetInt(ColorIdx);
 	int Style = a_NBT.GetInt(StyleIdx);
 
-	std::auto_ptr<cHorse> Monster(new cHorse(Type, Color, Style, 1));
+	std::unique_ptr<cHorse> Monster(new cHorse(Type, Color, Style, 1));
 
 	if (!LoadEntityBaseFromNBT(*Monster.get(), a_NBT, a_TagIdx))
 	{
@@ -2154,7 +2232,7 @@ void cWSSAnvil::LoadHorseFromNBT(cEntityList & a_Entities, const cParsedNBT & a_
 
 void cWSSAnvil::LoadIronGolemFromNBT(cEntityList & a_Entities, const cParsedNBT & a_NBT, int a_TagIdx)
 {
-	std::auto_ptr<cIronGolem> Monster(new cIronGolem());
+	std::unique_ptr<cIronGolem> Monster(new cIronGolem());
 	if (!LoadEntityBaseFromNBT(*Monster.get(), a_NBT, a_TagIdx))
 	{
 		return;
@@ -2183,7 +2261,7 @@ void cWSSAnvil::LoadMagmaCubeFromNBT(cEntityList & a_Entities, const cParsedNBT
 
 	int Size = a_NBT.GetInt(SizeIdx);
 
-	std::auto_ptr<cMagmaCube> Monster(new cMagmaCube(Size));
+	std::unique_ptr<cMagmaCube> Monster(new cMagmaCube(Size));
 	if (!LoadEntityBaseFromNBT(*Monster.get(), a_NBT, a_TagIdx))
 	{
 		return;
@@ -2203,7 +2281,7 @@ void cWSSAnvil::LoadMagmaCubeFromNBT(cEntityList & a_Entities, const cParsedNBT
 
 void cWSSAnvil::LoadMooshroomFromNBT(cEntityList & a_Entities, const cParsedNBT & a_NBT, int a_TagIdx)
 {
-	std::auto_ptr<cMooshroom> Monster(new cMooshroom());
+	std::unique_ptr<cMooshroom> Monster(new cMooshroom());
 	if (!LoadEntityBaseFromNBT(*Monster.get(), a_NBT, a_TagIdx))
 	{
 		return;
@@ -2223,7 +2301,7 @@ void cWSSAnvil::LoadMooshroomFromNBT(cEntityList & a_Entities, const cParsedNBT
 
 void cWSSAnvil::LoadOcelotFromNBT(cEntityList & a_Entities, const cParsedNBT & a_NBT, int a_TagIdx)
 {
-	std::auto_ptr<cOcelot> Monster(new cOcelot());
+	std::unique_ptr<cOcelot> Monster(new cOcelot());
 	if (!LoadEntityBaseFromNBT(*Monster.get(), a_NBT, a_TagIdx))
 	{
 		return;
@@ -2243,7 +2321,7 @@ void cWSSAnvil::LoadOcelotFromNBT(cEntityList & a_Entities, const cParsedNBT & a
 
 void cWSSAnvil::LoadPigFromNBT(cEntityList & a_Entities, const cParsedNBT & a_NBT, int a_TagIdx)
 {
-	std::auto_ptr<cPig> Monster(new cPig());
+	std::unique_ptr<cPig> Monster(new cPig());
 	if (!LoadEntityBaseFromNBT(*Monster.get(), a_NBT, a_TagIdx))
 	{
 		return;
@@ -2270,7 +2348,7 @@ void cWSSAnvil::LoadSheepFromNBT(cEntityList & a_Entities, const cParsedNBT & a_
 		Color = (int)a_NBT.GetByte(ColorIdx);
 	}
 
-	std::auto_ptr<cSheep> Monster(new cSheep(Color));
+	std::unique_ptr<cSheep> Monster(new cSheep(Color));
 	if (!LoadEntityBaseFromNBT(*Monster.get(), a_NBT, a_TagIdx))
 	{
 		return;
@@ -2296,7 +2374,7 @@ void cWSSAnvil::LoadSheepFromNBT(cEntityList & a_Entities, const cParsedNBT & a_
 
 void cWSSAnvil::LoadSilverfishFromNBT(cEntityList & a_Entities, const cParsedNBT & a_NBT, int a_TagIdx)
 {
-	std::auto_ptr<cSilverfish> Monster(new cSilverfish());
+	std::unique_ptr<cSilverfish> Monster(new cSilverfish());
 	if (!LoadEntityBaseFromNBT(*Monster.get(), a_NBT, a_TagIdx))
 	{
 		return;
@@ -2317,12 +2395,14 @@ void cWSSAnvil::LoadSilverfishFromNBT(cEntityList & a_Entities, const cParsedNBT
 void cWSSAnvil::LoadSkeletonFromNBT(cEntityList & a_Entities, const cParsedNBT & a_NBT, int a_TagIdx)
 {
 	int TypeIdx = a_NBT.FindChildByName(a_TagIdx, "SkeletonType");
-
-	if (TypeIdx < 0) { return; }
+	if (TypeIdx < 0)
+	{
+		return;
+	}
 
 	bool Type = ((a_NBT.GetByte(TypeIdx) == 1) ? true : false);
 
-	std::auto_ptr<cSkeleton> Monster(new cSkeleton(Type));
+	std::unique_ptr<cSkeleton> Monster(new cSkeleton(Type));
 	if (!LoadEntityBaseFromNBT(*Monster.get(), a_NBT, a_TagIdx))
 	{
 		return;
@@ -2351,7 +2431,7 @@ void cWSSAnvil::LoadSlimeFromNBT(cEntityList & a_Entities, const cParsedNBT & a_
 
 	int Size = a_NBT.GetInt(SizeIdx);
 
-	std::auto_ptr<cSlime> Monster(new cSlime(Size));
+	std::unique_ptr<cSlime> Monster(new cSlime(Size));
 	if (!LoadEntityBaseFromNBT(*Monster.get(), a_NBT, a_TagIdx))
 	{
 		return;
@@ -2371,7 +2451,7 @@ void cWSSAnvil::LoadSlimeFromNBT(cEntityList & a_Entities, const cParsedNBT & a_
 
 void cWSSAnvil::LoadSnowGolemFromNBT(cEntityList & a_Entities, const cParsedNBT & a_NBT, int a_TagIdx)
 {
-	std::auto_ptr<cSnowGolem> Monster(new cSnowGolem());
+	std::unique_ptr<cSnowGolem> Monster(new cSnowGolem());
 	if (!LoadEntityBaseFromNBT(*Monster.get(), a_NBT, a_TagIdx))
 	{
 		return;
@@ -2391,7 +2471,7 @@ void cWSSAnvil::LoadSnowGolemFromNBT(cEntityList & a_Entities, const cParsedNBT
 
 void cWSSAnvil::LoadSpiderFromNBT(cEntityList & a_Entities, const cParsedNBT & a_NBT, int a_TagIdx)
 {
-	std::auto_ptr<cSpider> Monster(new cSpider());
+	std::unique_ptr<cSpider> Monster(new cSpider());
 	if (!LoadEntityBaseFromNBT(*Monster.get(), a_NBT, a_TagIdx))
 	{
 		return;
@@ -2411,7 +2491,7 @@ void cWSSAnvil::LoadSpiderFromNBT(cEntityList & a_Entities, const cParsedNBT & a
 
 void cWSSAnvil::LoadSquidFromNBT(cEntityList & a_Entities, const cParsedNBT & a_NBT, int a_TagIdx)
 {
-	std::auto_ptr<cSquid> Monster(new cSquid());
+	std::unique_ptr<cSquid> Monster(new cSquid());
 	if (!LoadEntityBaseFromNBT(*Monster.get(), a_NBT, a_TagIdx))
 	{
 		return;
@@ -2432,12 +2512,14 @@ void cWSSAnvil::LoadSquidFromNBT(cEntityList & a_Entities, const cParsedNBT & a_
 void cWSSAnvil::LoadVillagerFromNBT(cEntityList & a_Entities, const cParsedNBT & a_NBT, int a_TagIdx)
 {
 	int TypeIdx = a_NBT.FindChildByName(a_TagIdx, "Profession");
-
-	if (TypeIdx < 0) { return; }
+	if (TypeIdx < 0)
+	{
+		return;
+	}
 
 	int Type = a_NBT.GetInt(TypeIdx);
 
-	std::auto_ptr<cVillager> Monster(new cVillager(cVillager::eVillagerType(Type)));
+	std::unique_ptr<cVillager> Monster(new cVillager(cVillager::eVillagerType(Type)));
 	if (!LoadEntityBaseFromNBT(*Monster.get(), a_NBT, a_TagIdx))
 	{
 		return;
@@ -2457,7 +2539,7 @@ void cWSSAnvil::LoadVillagerFromNBT(cEntityList & a_Entities, const cParsedNBT &
 
 void cWSSAnvil::LoadWitchFromNBT(cEntityList & a_Entities, const cParsedNBT & a_NBT, int a_TagIdx)
 {
-	std::auto_ptr<cWitch> Monster(new cWitch());
+	std::unique_ptr<cWitch> Monster(new cWitch());
 	if (!LoadEntityBaseFromNBT(*Monster.get(), a_NBT, a_TagIdx))
 	{
 		return;
@@ -2477,7 +2559,7 @@ void cWSSAnvil::LoadWitchFromNBT(cEntityList & a_Entities, const cParsedNBT & a_
 
 void cWSSAnvil::LoadWitherFromNBT(cEntityList & a_Entities, const cParsedNBT & a_NBT, int a_TagIdx)
 {
-	std::auto_ptr<cWither> Monster(new cWither());
+	std::unique_ptr<cWither> Monster(new cWither());
 	if (!LoadEntityBaseFromNBT(*Monster.get(), a_NBT, a_TagIdx))
 	{
 		return;
@@ -2503,7 +2585,7 @@ void cWSSAnvil::LoadWitherFromNBT(cEntityList & a_Entities, const cParsedNBT & a
 
 void cWSSAnvil::LoadWolfFromNBT(cEntityList & a_Entities, const cParsedNBT & a_NBT, int a_TagIdx)
 {
-	std::auto_ptr<cWolf> Monster(new cWolf());
+	std::unique_ptr<cWolf> Monster(new cWolf());
 	if (!LoadEntityBaseFromNBT(*Monster.get(), a_NBT, a_TagIdx))
 	{
 		return;
@@ -2557,12 +2639,14 @@ void cWSSAnvil::LoadWolfFromNBT(cEntityList & a_Entities, const cParsedNBT & a_N
 void cWSSAnvil::LoadZombieFromNBT(cEntityList & a_Entities, const cParsedNBT & a_NBT, int a_TagIdx)
 {
 	int IsVillagerIdx = a_NBT.FindChildByName(a_TagIdx, "IsVillager");
-
-	if (IsVillagerIdx < 0) { return; }
+	if (IsVillagerIdx < 0)
+	{
+		return;
+	}
 
 	bool IsVillagerZombie = ((a_NBT.GetByte(IsVillagerIdx) == 1) ? true : false);
 
-	std::auto_ptr<cZombie> Monster(new cZombie(IsVillagerZombie));
+	std::unique_ptr<cZombie> Monster(new cZombie(IsVillagerZombie));
 	if (!LoadEntityBaseFromNBT(*Monster.get(), a_NBT, a_TagIdx))
 	{
 		return;
@@ -2582,7 +2666,7 @@ void cWSSAnvil::LoadZombieFromNBT(cEntityList & a_Entities, const cParsedNBT & a
 
 void cWSSAnvil::LoadPigZombieFromNBT(cEntityList & a_Entities, const cParsedNBT & a_NBT, int a_TagIdx)
 {
-	std::auto_ptr<cZombiePigman> Monster(new cZombiePigman());
+	std::unique_ptr<cZombiePigman> Monster(new cZombiePigman());
 	if (!LoadEntityBaseFromNBT(*Monster.get(), a_NBT, a_TagIdx))
 	{
 		return;
@@ -2839,6 +2923,8 @@ cWSSAnvil::cMCAFile::cMCAFile(const AString & a_FileName, int a_RegionX, int a_R
 
 bool cWSSAnvil::cMCAFile::OpenFile(bool a_IsForReading)
 {
+	bool writeOutNeeded = false;
+	
 	if (m_File.IsOpen())
 	{
 		// Already open
@@ -2864,11 +2950,26 @@ bool cWSSAnvil::cMCAFile::OpenFile(bool a_IsForReading)
 	if (m_File.Read(m_Header, sizeof(m_Header)) != sizeof(m_Header))
 	{
 		// Cannot read the header - perhaps the file has just been created?
-		// Try writing a nullptr header (both chunk offsets and timestamps):
+		// Try writing a nullptr header for chunk offsets:
 		memset(m_Header, 0, sizeof(m_Header));
+		writeOutNeeded = true;
+	}
+
+	// Load the TimeStamps:
+	if (m_File.Read(m_TimeStamps, sizeof(m_TimeStamps)) != sizeof(m_TimeStamps))
+	{
+		// Cannot read the time stamps - perhaps the file has just been created?
+		// Try writing a nullptr header for timestamps:
+		memset(m_TimeStamps, 0, sizeof(m_TimeStamps));
+		writeOutNeeded = true;
+	}
+	
+	if (writeOutNeeded)
+	{
+		m_File.Seek(0);
 		if (
-			(m_File.Write(m_Header, sizeof(m_Header)) != sizeof(m_Header)) ||  // Real header - chunk offsets
-			(m_File.Write(m_Header, sizeof(m_Header)) != sizeof(m_Header))     // Bogus data for the chunk timestamps
+			(m_File.Write(m_Header, sizeof(m_Header)) != sizeof(m_Header)) ||           // Write chunk offsets
+			(m_File.Write(m_TimeStamps, sizeof(m_TimeStamps)) != sizeof(m_TimeStamps))  // Write chunk timestamps
 		)
 		{
 			LOGWARNING("Cannot process MCA header in file \"%s\", chunks in that file will be lost", m_FileName.c_str());
@@ -2999,7 +3100,13 @@ bool cWSSAnvil::cMCAFile::SetChunkData(const cChunkCoords & a_Chunk, const AStri
 		);
 		return false;
 	}
+	
+	// Store the header info in the table
 	m_Header[LocalX + 32 * LocalZ] = htonl((ChunkSector << 8) | ChunkSize);
+
+	// Set the modification time
+	m_TimeStamps[LocalX + 32 * LocalZ] =  htonl(static_cast<u_long>(time(nullptr)));
+
 	if (m_File.Seek(0) < 0)
 	{
 		LOGWARNING("Cannot save chunk [%d, %d], seeking in file \"%s\" failed", a_Chunk.m_ChunkX, a_Chunk.m_ChunkZ, GetFileName().c_str());
@@ -3010,6 +3117,11 @@ bool cWSSAnvil::cMCAFile::SetChunkData(const cChunkCoords & a_Chunk, const AStri
 		LOGWARNING("Cannot save chunk [%d, %d], writing header to file \"%s\" failed", a_Chunk.m_ChunkX, a_Chunk.m_ChunkZ, GetFileName().c_str());
 		return false;
 	}
+	if (m_File.Write(m_TimeStamps, sizeof(m_TimeStamps)) != sizeof(m_TimeStamps))
+	{
+		LOGWARNING("Cannot save chunk [%d, %d], writing timestamps to file \"%s\" failed", a_Chunk.m_ChunkX, a_Chunk.m_ChunkZ, GetFileName().c_str());
+		return false;
+	}
 	
 	return true;
 }
diff --git a/src/WorldStorage/WSSAnvil.h b/src/WorldStorage/WSSAnvil.h
index 9c579a617..974ba932e 100644..100755
--- a/src/WorldStorage/WSSAnvil.h
+++ b/src/WorldStorage/WSSAnvil.h
@@ -80,7 +80,8 @@ protected:
 		// First 1024 entries are chunk locations - the 3 + 1 byte sector-offset and sector-count
 		unsigned m_Header[MCA_MAX_CHUNKS];
 		
-		// Chunk timestamps, following the chunk headers, are unused by MCS
+		// Chunk timestamps, following the chunk headers
+		unsigned m_TimeStamps[MCA_MAX_CHUNKS];
 		
 		/// Finds a free location large enough to hold a_Data. Gets a hint of the chunk coords, places the data there if it fits. Returns the sector number.
 		unsigned FindFreeLocation(int a_LocalX, int a_LocalZ, const AString & a_Data);
@@ -148,6 +149,7 @@ protected:
 	cBlockEntity * LoadDropperFromNBT     (const cParsedNBT & a_NBT, int a_TagIdx, int a_BlockX, int a_BlockY, int a_BlockZ);
 	cBlockEntity * LoadFlowerPotFromNBT   (const cParsedNBT & a_NBT, int a_TagIdx, int a_BlockX, int a_BlockY, int a_BlockZ);
 	cBlockEntity * LoadFurnaceFromNBT     (const cParsedNBT & a_NBT, int a_TagIdx, int a_BlockX, int a_BlockY, int a_BlockZ, BLOCKTYPE a_BlockType, NIBBLETYPE a_BlockMeta);
+	cBlockEntity * LoadMobSpawnerFromNBT  (const cParsedNBT & a_NBT, int a_TagIdx, int a_BlockX, int a_BlockY, int a_BlockZ);
 	cBlockEntity * LoadHopperFromNBT      (const cParsedNBT & a_NBT, int a_TagIdx, int a_BlockX, int a_BlockY, int a_BlockZ);
 	cBlockEntity * LoadJukeboxFromNBT     (const cParsedNBT & a_NBT, int a_TagIdx, int a_BlockX, int a_BlockY, int a_BlockZ);
 	cBlockEntity * LoadMobHeadFromNBT     (const cParsedNBT & a_NBT, int a_TagIdx, int a_BlockX, int a_BlockY, int a_BlockZ);
diff --git a/src/WorldStorage/WorldStorage.cpp b/src/WorldStorage/WorldStorage.cpp
index 31318ee67..c7a295175 100644
--- a/src/WorldStorage/WorldStorage.cpp
+++ b/src/WorldStorage/WorldStorage.cpp
@@ -140,11 +140,11 @@ size_t cWorldStorage::GetSaveQueueLength(void)
 
 
 
-void cWorldStorage::QueueLoadChunk(int a_ChunkX, int a_ChunkZ)
+void cWorldStorage::QueueLoadChunk(int a_ChunkX, int a_ChunkZ, cChunkCoordCallback * a_Callback)
 {
 	ASSERT(m_World->IsChunkQueued(a_ChunkX, a_ChunkZ));
 
-	m_LoadQueue.EnqueueItem(cChunkCoords(a_ChunkX, a_ChunkZ));
+	m_LoadQueue.EnqueueItem(cChunkCoordsWithCallback(a_ChunkX, a_ChunkZ, a_Callback));
 	m_Event.Set();
 }
 
@@ -152,11 +152,11 @@ void cWorldStorage::QueueLoadChunk(int a_ChunkX, int a_ChunkZ)
 
 
 
-void cWorldStorage::QueueSaveChunk(int a_ChunkX, int a_ChunkZ)
+void cWorldStorage::QueueSaveChunk(int a_ChunkX, int a_ChunkZ, cChunkCoordCallback * a_Callback)
 {
 	ASSERT(m_World->IsChunkValid(a_ChunkX, a_ChunkZ));
 
-	m_SaveQueue.EnqueueItemIfNotPresent(cChunkCoords(a_ChunkX, a_ChunkZ));
+	m_SaveQueue.EnqueueItem(cChunkCoordsWithCallback(a_ChunkX, a_ChunkZ, a_Callback));
 	m_Event.Set();
 }
 
@@ -166,7 +166,11 @@ void cWorldStorage::QueueSaveChunk(int a_ChunkX, int a_ChunkZ)
 
 void cWorldStorage::UnqueueLoad(int a_ChunkX, int a_ChunkZ)
 {
-	m_LoadQueue.Remove(cChunkCoords(a_ChunkX, a_ChunkZ));
+	m_LoadQueue.RemoveIf([=](cChunkCoordsWithCallback & a_Item)
+		{
+			return (a_Item.m_ChunkX == a_ChunkX) && (a_Item.m_ChunkZ == a_ChunkZ);
+		}
+	);
 }
 
 
@@ -175,7 +179,11 @@ void cWorldStorage::UnqueueLoad(int a_ChunkX, int a_ChunkZ)
 
 void cWorldStorage::UnqueueSave(const cChunkCoords & a_Chunk)
 {
-	m_SaveQueue.Remove(a_Chunk);
+	m_SaveQueue.RemoveIf([=](cChunkCoordsWithCallback & a_Item)
+		{
+			return (a_Item.m_ChunkX == a_Chunk.m_ChunkX) && (a_Item.m_ChunkZ == a_Chunk.m_ChunkZ);
+		}
+	);
 }
 
 
@@ -244,14 +252,23 @@ void cWorldStorage::Execute(void)
 
 bool cWorldStorage::LoadOneChunk(void)
 {
-	cChunkCoords ToLoad(0, 0);
+	// Dequeue an item, bail out if there's none left:
+	cChunkCoordsWithCallback ToLoad(0, 0, nullptr);
 	bool ShouldLoad = m_LoadQueue.TryDequeueItem(ToLoad);
+	if (!ShouldLoad)
+	{
+		return false;
+	}
 
-	if (ShouldLoad)
+	// Load the chunk:
+	bool res = LoadChunk(ToLoad.m_ChunkX, ToLoad.m_ChunkZ);
+
+	// Call the callback, if specified:
+	if (ToLoad.m_Callback != nullptr)
 	{
-		return LoadChunk(ToLoad.m_ChunkX, ToLoad.m_ChunkZ);
+		ToLoad.m_Callback->Call(ToLoad.m_ChunkX, ToLoad.m_ChunkZ);
 	}
-	return false;
+	return res;
 }
 
 
@@ -260,17 +277,30 @@ bool cWorldStorage::LoadOneChunk(void)
 
 bool cWorldStorage::SaveOneChunk(void)
 {
-	cChunkCoords ToSave(0, 0);
+	// Dequeue one chunk to save:
+	cChunkCoordsWithCallback ToSave(0, 0, nullptr);
 	bool ShouldSave = m_SaveQueue.TryDequeueItem(ToSave);
-	if (ShouldSave && m_World->IsChunkValid(ToSave.m_ChunkX, ToSave.m_ChunkZ))
+	if (!ShouldSave)
+	{
+		return false;
+	}
+	
+	// Save the chunk, if it's valid:
+	if (m_World->IsChunkValid(ToSave.m_ChunkX, ToSave.m_ChunkZ))
 	{
 		m_World->MarkChunkSaving(ToSave.m_ChunkX, ToSave.m_ChunkZ);
-		if (m_SaveSchema->SaveChunk(ToSave))
+		if (m_SaveSchema->SaveChunk(cChunkCoords(ToSave.m_ChunkX, ToSave.m_ChunkZ)))
 		{
 			m_World->MarkChunkSaved(ToSave.m_ChunkX, ToSave.m_ChunkZ);
 		}
 	}
-	return ShouldSave;
+
+	// Call the callback, if specified:
+	if (ToSave.m_Callback != nullptr)
+	{
+		ToSave.m_Callback->Call(ToSave.m_ChunkX, ToSave.m_ChunkZ);
+	}
+	return true;
 }
 
 
diff --git a/src/WorldStorage/WorldStorage.h b/src/WorldStorage/WorldStorage.h
index fc7e9f84c..e9ba2a8e2 100644
--- a/src/WorldStorage/WorldStorage.h
+++ b/src/WorldStorage/WorldStorage.h
@@ -25,7 +25,7 @@
 // fwd:
 class cWorld;
 
-typedef cQueue<cChunkCoords> cChunkCoordsQueue;
+typedef cQueue<cChunkCoordsWithCallback> cChunkCoordsQueue;
 
 
 
@@ -64,8 +64,8 @@ public:
 	cWorldStorage(void);
 	~cWorldStorage();
 	
-	void QueueLoadChunk(int a_ChunkX, int a_ChunkZ);
-	void QueueSaveChunk(int a_ChunkX, int a_ChunkZ);
+	void QueueLoadChunk(int a_ChunkX, int a_ChunkZ, cChunkCoordCallback * a_Callback = nullptr);
+	void QueueSaveChunk(int a_ChunkX, int a_ChunkZ, cChunkCoordCallback * a_Callback = nullptr);
 	
 	void UnqueueLoad(int a_ChunkX, int a_ChunkZ);
 	void UnqueueSave(const cChunkCoords & a_Chunk);
diff --git a/src/XMLParser.h b/src/XMLParser.h
index 5b53e55cf..ea341bce6 100644
--- a/src/XMLParser.h
+++ b/src/XMLParser.h
@@ -105,11 +105,11 @@ public:
 		Destroy ();
 
 		// If the encoding or seperator are empty, then nullptr
-		if (pszEncoding != nullptr && pszEncoding [0] == 0)
+		if ((pszEncoding != nullptr) && (pszEncoding[0] == 0))
 		{
 			pszEncoding = nullptr;
 		}
-		if (pszSep != nullptr && pszSep [0] == 0)
+		if ((pszSep != nullptr) && (pszSep[0] == 0))
 		{
 			pszSep = nullptr;
 		}
@@ -147,7 +147,7 @@ public:
 	bool Parse (const char *pszBuffer, int nLength, bool fIsFinal = true)
 	{
 		assert (m_p != nullptr);
-		return XML_Parse (m_p, pszBuffer, nLength, fIsFinal) != 0;
+		return (XML_Parse (m_p, pszBuffer, nLength, fIsFinal) != 0);
 	}
 
 	// @cmember Parse internal buffer
@@ -254,7 +254,9 @@ protected:
 			XML_SetDefaultHandlerExpand (m_p, fEnable ? DefaultHandler : nullptr);
 		}
 		else
+		{
 			XML_SetDefaultHandler (m_p, fEnable ? DefaultHandler : nullptr);
+		}
 	}
 	
 	// @cmember Enable/Disable external entity ref handler
@@ -402,11 +404,17 @@ public:
 	{
 		XML_expat_version v = XML_ExpatVersionInfo ();
 		if (pnMajor)
+		{
 			*pnMajor = v .major;
+		}
 		if (pnMinor)
+		{
 			*pnMinor = v .minor;
+		}
 		if (pnMicro)
+		{
 			*pnMicro = v .micro;
+		}
 	}
 
 	// @cmember Get last error string
diff --git a/src/main.cpp b/src/main.cpp
index 463c54c28..d4adc1ed9 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -61,6 +61,7 @@ void NonCtrlHandler(int a_Signal)
 			std::signal(SIGSEGV, SIG_DFL);
 			LOGERROR("  D:    | MCServer has encountered an error and needs to close");
 			LOGERROR("Details | SIGSEGV: Segmentation fault");
+			PrintStackTrace();
 			abort();
 		}
 		case SIGABRT:
@@ -71,6 +72,7 @@ void NonCtrlHandler(int a_Signal)
 			std::signal(a_Signal, SIG_DFL);
 			LOGERROR("  D:    | MCServer has encountered an error and needs to close");
 			LOGERROR("Details | SIGABRT: Server self-terminated due to an internal fault");
+			PrintStackTrace();
 			abort();
 		}
 		case SIGINT:
@@ -137,6 +139,9 @@ LONG WINAPI LastChanceExceptionFilter(__in struct _EXCEPTION_POINTERS * a_Except
 	g_WriteMiniDump(GetCurrentProcess(), GetCurrentProcessId(), dumpFile, g_DumpFlags, (a_ExceptionInfo) ? &ExcInformation : nullptr, nullptr, nullptr);
 	CloseHandle(dumpFile);
 
+	// Print the stack trace for the basic debugging:
+	PrintStackTrace();
+
 	// Revert to old stack:
 	_asm
 	{
@@ -158,9 +163,9 @@ BOOL CtrlHandler(DWORD fdwCtrlType)
 	cRoot::m_TerminateEventRaised = true;
 	LOGD("Terminate event raised from the Windows CtrlHandler");
 
-	if (fdwCtrlType == CTRL_CLOSE_EVENT)  // Console window closed via 'x' button, Windows will try to close immediately, therefore...
+	while (!g_ServerTerminated)
 	{
-		while (!g_ServerTerminated) { cSleep::MilliSleep(100); }  // Delay as much as possible to try to get the server to shut down cleanly
+		std::this_thread::sleep_for(std::chrono::milliseconds(50));  // Delay as much as possible to try to get the server to shut down cleanly
 	}
 
 	return TRUE;
@@ -182,7 +187,7 @@ int main( int argc, char **argv)
 	#if defined(_MSC_VER) && defined(_DEBUG) && defined(ENABLE_LEAK_FINDER)
 	InitLeakFinder();
 	#endif
-	
+
 	// Magic code to produce dump-files on Windows if the server crashes:
 	#if defined(_WIN32) && !defined(_WIN64) && defined(_MSC_VER)
 	HINSTANCE hDbgHelp = LoadLibrary("DBGHELP.DLL");