diff --git a/src/main/java/biomesoplenty/BiomesOPlenty.java b/src/main/java/biomesoplenty/BiomesOPlenty.java
index d5932c1fe..d32f5c8da 100644
--- a/src/main/java/biomesoplenty/BiomesOPlenty.java
+++ b/src/main/java/biomesoplenty/BiomesOPlenty.java
@@ -23,6 +23,7 @@ import biomesoplenty.common.helpers.CreativeTabsBOP;
 import biomesoplenty.common.integration.TreecapitatorIntegration;
 import biomesoplenty.common.network.PacketPipeline;
 import biomesoplenty.common.utils.BOPModInfo;
+import biomesoplenty.common.world.WorldProviderBopHell;
 import biomesoplenty.common.world.WorldProviderPromised;
 import biomesoplenty.common.world.WorldTypeBOP;
 import biomesoplenty.common.world.decoration.ForcedDecorators;
@@ -89,6 +90,8 @@ public class BiomesOPlenty
         packetPipeline.initalize();
         
         TreecapitatorIntegration.init();
+		DimensionManager.unregisterProviderType(-1);
+		DimensionManager.registerProviderType(-1, WorldProviderBopHell.class, true);
         //DimensionManager.registerProviderType(BOPConfigurationIDs.promisedLandDimID, WorldProviderPromised.class, false);
         //DimensionManager.registerDimension(BOPConfigurationIDs.promisedLandDimID, BOPConfigurationIDs.promisedLandDimID);
     }
diff --git a/src/main/java/biomesoplenty/common/helpers/BiomeCacheBlockHell.java b/src/main/java/biomesoplenty/common/helpers/BiomeCacheBlockHell.java
new file mode 100644
index 000000000..7e2db17f4
--- /dev/null
+++ b/src/main/java/biomesoplenty/common/helpers/BiomeCacheBlockHell.java
@@ -0,0 +1,48 @@
+package biomesoplenty.common.helpers;
+
+import net.minecraft.world.biome.BiomeGenBase;
+
+public class BiomeCacheBlockHell
+{
+	/** An array of chunk temperatures saved by this cache. */
+	public float[] temperatureValues;
+
+	/** An array of chunk rainfall values saved by this cache. */
+	public float[] rainfallValues;
+
+	/** The array of biome types stored in this BiomeCacheBlock. */
+	public BiomeGenBase[] biomes;
+
+	/** The x coordinate of the BiomeCacheBlock. */
+	public int xPosition;
+
+	/** The z coordinate of the BiomeCacheBlock. */
+	public int zPosition;
+
+	/** The last time this BiomeCacheBlock was accessed, in milliseconds. */
+	public long lastAccessTime;
+
+	/** The BiomeCache object that contains this BiomeCacheBlock */
+	final BiomeCacheHell theBiomeCache;
+
+	public BiomeCacheBlockHell(BiomeCacheHell par1BiomeCache, int par2, int par3)
+	{
+		theBiomeCache = par1BiomeCache;
+		temperatureValues = new float[256];
+		rainfallValues = new float[256];
+		biomes = new BiomeGenBase[256];
+		xPosition = par2;
+		zPosition = par3;
+		BiomeCacheHell.getChunkManager(par1BiomeCache).getTemperatures(temperatureValues, par2 << 4, par3 << 4, 16, 16);
+		BiomeCacheHell.getChunkManager(par1BiomeCache).getRainfall(rainfallValues, par2 << 4, par3 << 4, 16, 16);
+		BiomeCacheHell.getChunkManager(par1BiomeCache).getBiomeGenAt(biomes, par2 << 4, par3 << 4, 16, 16, false);
+	}
+
+	/**
+	 * Returns the BiomeGenBase related to the x, z position from the cache block.
+	 */
+	public BiomeGenBase getBiomeGenAt(int par1, int par2)
+	{
+		return biomes[par1 & 15 | (par2 & 15) << 4];
+	}
+}
diff --git a/src/main/java/biomesoplenty/common/helpers/BiomeCacheHell.java b/src/main/java/biomesoplenty/common/helpers/BiomeCacheHell.java
new file mode 100644
index 000000000..8660aa8a0
--- /dev/null
+++ b/src/main/java/biomesoplenty/common/helpers/BiomeCacheHell.java
@@ -0,0 +1,105 @@
+package biomesoplenty.common.helpers;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import net.minecraft.util.LongHashMap;
+import net.minecraft.world.biome.BiomeGenBase;
+import biomesoplenty.common.world.WorldChunkManagerBOPHell;
+import biomesoplenty.common.world.WorldChunkManagerPromised;
+
+public class BiomeCacheHell
+{
+	/** Reference to the WorldChunkManager */
+	private final WorldChunkManagerBOPHell chunkManager;
+
+	/** The last time this BiomeCache was cleaned, in milliseconds. */
+	private long lastCleanupTime = 0L;
+
+	/**
+	 * The map of keys to BiomeCacheBlocks. Keys are based on the chunk x, z coordinates as (x | z << 32).
+	 */
+	private LongHashMap cacheMap = new LongHashMap();
+
+	/** The list of cached BiomeCacheBlocks */
+	@SuppressWarnings("rawtypes")
+	private List cache = new ArrayList();
+
+	public BiomeCacheHell(WorldChunkManagerBOPHell par1WorldChunkManager)
+	{
+		chunkManager = par1WorldChunkManager;
+	}
+
+	/**
+	 * Returns a biome cache block at location specified.
+	 */
+	@SuppressWarnings("unchecked")
+	public BiomeCacheBlockHell getBiomeCacheBlock(int par1, int par2)
+	{
+		par1 >>= 4;
+		par2 >>= 4;
+		long var3 = par1 & 4294967295L | (par2 & 4294967295L) << 32;
+		BiomeCacheBlockHell var5 = (BiomeCacheBlockHell)cacheMap.getValueByKey(var3);
+
+		if (var5 == null)
+		{
+			var5 = new BiomeCacheBlockHell(this, par1, par2);
+			cacheMap.add(var3, var5);
+			cache.add(var5);
+		}
+
+		var5.lastAccessTime = System.currentTimeMillis();
+		return var5;
+	}
+
+	/**
+	 * Returns the BiomeGenBase related to the x, z position from the cache.
+	 */
+	public BiomeGenBase getBiomeGenAt(int par1, int par2)
+	{
+		return this.getBiomeCacheBlock(par1, par2).getBiomeGenAt(par1, par2);
+	}
+
+	/**
+	 * Removes BiomeCacheBlocks from this cache that haven't been accessed in at least 30 seconds.
+	 */
+	public void cleanupCache()
+	{
+		long var1 = System.currentTimeMillis();
+		long var3 = var1 - lastCleanupTime;
+
+		if (var3 > 7500L || var3 < 0L)
+		{
+			lastCleanupTime = var1;
+
+			for (int var5 = 0; var5 < cache.size(); ++var5)
+			{
+				BiomeCacheBlockHell var6 = (BiomeCacheBlockHell)cache.get(var5);
+				long var7 = var1 - var6.lastAccessTime;
+
+				if (var7 > 30000L || var7 < 0L)
+				{
+					cache.remove(var5--);
+					long var9 = var6.xPosition & 4294967295L | (var6.zPosition & 4294967295L) << 32;
+					cacheMap.remove(var9);
+				}
+			}
+		}
+	}
+
+	/**
+	 * Returns the array of cached biome types in the BiomeCacheBlock at the given location.
+	 */
+	public BiomeGenBase[] getCachedBiomes(int par1, int par2)
+	{
+		return this.getBiomeCacheBlock(par1, par2).biomes;
+	}
+
+	/**
+	 * Get the world chunk manager object for a biome list.
+	 */
+	static WorldChunkManagerBOPHell getChunkManager(BiomeCacheHell par0BiomeCache)
+	{
+		return par0BiomeCache.chunkManager;
+	}
+}
diff --git a/src/main/java/biomesoplenty/common/world/ChunkProviderBOPHell.java b/src/main/java/biomesoplenty/common/world/ChunkProviderBOPHell.java
new file mode 100644
index 000000000..ccaf6cddd
--- /dev/null
+++ b/src/main/java/biomesoplenty/common/world/ChunkProviderBOPHell.java
@@ -0,0 +1,659 @@
+package biomesoplenty.common.world;
+
+import static net.minecraftforge.event.terraingen.DecorateBiomeEvent.Decorate.EventType.SHROOM;
+import static net.minecraftforge.event.terraingen.InitMapGenEvent.EventType.NETHER_BRIDGE;
+import static net.minecraftforge.event.terraingen.InitMapGenEvent.EventType.NETHER_CAVE;
+import static net.minecraftforge.event.terraingen.PopulateChunkEvent.Populate.EventType.FIRE;
+import static net.minecraftforge.event.terraingen.PopulateChunkEvent.Populate.EventType.GLOWSTONE;
+import static net.minecraftforge.event.terraingen.PopulateChunkEvent.Populate.EventType.NETHER_LAVA;
+
+import java.util.List;
+import java.util.Random;
+
+import net.minecraft.block.Block;
+import net.minecraft.block.BlockFalling;
+import net.minecraft.block.BlockSand;
+import net.minecraft.entity.EnumCreatureType;
+import net.minecraft.init.Blocks;
+import net.minecraft.util.IProgressUpdate;
+import net.minecraft.world.ChunkPosition;
+import net.minecraft.world.World;
+import net.minecraft.world.biome.BiomeGenBase;
+import net.minecraft.world.chunk.Chunk;
+import net.minecraft.world.chunk.IChunkProvider;
+import net.minecraft.world.gen.MapGenBase;
+import net.minecraft.world.gen.MapGenCavesHell;
+import net.minecraft.world.gen.NoiseGeneratorOctaves;
+import net.minecraft.world.gen.feature.WorldGenFire;
+import net.minecraft.world.gen.feature.WorldGenFlowers;
+import net.minecraft.world.gen.feature.WorldGenGlowStone1;
+import net.minecraft.world.gen.feature.WorldGenGlowStone2;
+import net.minecraft.world.gen.feature.WorldGenHellLava;
+import net.minecraft.world.gen.feature.WorldGenMinable;
+import net.minecraft.world.gen.structure.MapGenNetherBridge;
+import net.minecraftforge.common.MinecraftForge;
+import net.minecraftforge.event.terraingen.ChunkProviderEvent;
+import net.minecraftforge.event.terraingen.DecorateBiomeEvent;
+import net.minecraftforge.event.terraingen.PopulateChunkEvent;
+import net.minecraftforge.event.terraingen.TerrainGen;
+
+public class ChunkProviderBOPHell implements IChunkProvider
+{
+	private Random hellRNG;
+	private NoiseGeneratorOctaves netherNoiseGen1;
+	private NoiseGeneratorOctaves netherNoiseGen2;
+	private NoiseGeneratorOctaves netherNoiseGen3;
+	private NoiseGeneratorOctaves slowsandGravelNoiseGen;
+	private NoiseGeneratorOctaves netherrackExculsivityNoiseGen;
+	public NoiseGeneratorOctaves netherNoiseGen6;
+	public NoiseGeneratorOctaves netherNoiseGen7;
+	private World worldObj;
+	private double[] noiseField;
+	public MapGenNetherBridge genNetherBridge = new MapGenNetherBridge();
+	private double[] slowsandNoise = new double[256];
+	private double[] gravelNoise = new double[256];
+	private BiomeGenBase[] biomesForGeneration;
+	private double[] netherrackExclusivityNoise = new double[256];
+	private MapGenBase netherCaveGenerator = new MapGenCavesHell();
+	double[] noiseData1;
+	double[] noiseData2;
+	double[] noiseData3;
+	double[] noiseData4;
+	double[] noiseData5;
+
+	{
+		genNetherBridge = (MapGenNetherBridge) TerrainGen.getModdedMapGen(genNetherBridge, NETHER_BRIDGE);
+		netherCaveGenerator = TerrainGen.getModdedMapGen(netherCaveGenerator, NETHER_CAVE);
+	}
+
+	public ChunkProviderBOPHell(World par1World, long par2)
+	{
+		worldObj = par1World;
+		hellRNG = new Random(par2);
+		netherNoiseGen1 = new NoiseGeneratorOctaves(hellRNG, 16);
+		netherNoiseGen2 = new NoiseGeneratorOctaves(hellRNG, 16);
+		netherNoiseGen3 = new NoiseGeneratorOctaves(hellRNG, 8);
+		slowsandGravelNoiseGen = new NoiseGeneratorOctaves(hellRNG, 4);
+		netherrackExculsivityNoiseGen = new NoiseGeneratorOctaves(hellRNG, 4);
+		netherNoiseGen6 = new NoiseGeneratorOctaves(hellRNG, 10);
+		netherNoiseGen7 = new NoiseGeneratorOctaves(hellRNG, 16);
+
+		/*NoiseGeneratorOctaves[] noiseGens = {netherNoiseGen1, netherNoiseGen2, netherNoiseGen3, slowsandGravelNoiseGen, netherrackExculsivityNoiseGen, netherNoiseGen6, netherNoiseGen7};
+		noiseGens = TerrainGen.getModdedNoiseGenerators(par1World, hellRNG, noiseGens);
+		netherNoiseGen1 = noiseGens[0];
+		netherNoiseGen2 = noiseGens[1];
+		netherNoiseGen3 = noiseGens[2];
+		slowsandGravelNoiseGen = noiseGens[3];
+		netherrackExculsivityNoiseGen = noiseGens[4];
+		netherNoiseGen6 = noiseGens[5];
+		netherNoiseGen7 = noiseGens[6];*/
+	}
+
+	/**
+	 * Generates the shape of the terrain in the nether.
+	 */
+	 public void generateNetherTerrain(int par1, int par2, Block[] blocks)
+	{
+		byte b0 = 4;
+		byte b1 = 32;
+		int k = b0 + 1;
+		byte b2 = 17;
+		int l = b0 + 1;
+		noiseField = this.initializeNoiseField(noiseField, par1 * b0, 0, par2 * b0, k, b2, l);
+
+		for (int i1 = 0; i1 < b0; ++i1)
+		{
+			for (int j1 = 0; j1 < b0; ++j1)
+			{
+				for (int k1 = 0; k1 < 16; ++k1)
+				{
+					double d0 = 0.125D;
+					double d1 = noiseField[((i1 + 0) * l + j1 + 0) * b2 + k1 + 0];
+					double d2 = noiseField[((i1 + 0) * l + j1 + 1) * b2 + k1 + 0];
+					double d3 = noiseField[((i1 + 1) * l + j1 + 0) * b2 + k1 + 0];
+					double d4 = noiseField[((i1 + 1) * l + j1 + 1) * b2 + k1 + 0];
+					double d5 = (noiseField[((i1 + 0) * l + j1 + 0) * b2 + k1 + 1] - d1) * d0;
+					double d6 = (noiseField[((i1 + 0) * l + j1 + 1) * b2 + k1 + 1] - d2) * d0;
+					double d7 = (noiseField[((i1 + 1) * l + j1 + 0) * b2 + k1 + 1] - d3) * d0;
+					double d8 = (noiseField[((i1 + 1) * l + j1 + 1) * b2 + k1 + 1] - d4) * d0;
+
+					for (int l1 = 0; l1 < 8; ++l1)
+					{
+						double d9 = 0.25D;
+						double d10 = d1;
+						double d11 = d2;
+						double d12 = (d3 - d1) * d9;
+						double d13 = (d4 - d2) * d9;
+
+						for (int i2 = 0; i2 < 4; ++i2)
+						{
+							int j2 = i2 + i1 * 4 << 11 | 0 + j1 * 4 << 7 | k1 * 8 + l1;
+							short short1 = 128;
+							double d14 = 0.25D;
+							double d15 = d10;
+							double d16 = (d11 - d10) * d14;
+
+							for (int k2 = 0; k2 < 4; ++k2)
+							{
+								Block l2 = Blocks.air;
+
+								if (k1 * 8 + l1 < b1)
+								{
+									l2 = Blocks.lava;
+								}
+
+								if (d15 > 0.0D)
+								{
+									l2 = Blocks.netherrack;
+								}
+
+								blocks[j2] = l2;
+								j2 += short1;
+								d15 += d16;
+							}
+
+							d10 += d12;
+							d11 += d13;
+						}
+
+						d1 += d5;
+						d2 += d6;
+						d3 += d7;
+						d4 += d8;
+					}
+				}
+			}
+		}
+	}
+
+	 /**
+	  * name based on ChunkProviderGenerate
+	  */
+	 public void replaceBlocksForBiome(int par1, int par2, Block[] blocks, BiomeGenBase[] par4ArrayOfBiomeGenBase)
+	 {
+		 //ChunkProviderEvent.ReplaceBiomeBlocks event = new ChunkProviderEvent.ReplaceBiomeBlocks(this, par1, par2, par3ArrayOfByte, par4ArrayOfBiomeGenBase);
+		 //MinecraftForge.EVENT_BUS.post(event);
+		 //if (event.getResult() == Result.DENY) return;
+
+		 byte b0 = 32;
+		 double d0 = 0.03125D;
+		 slowsandNoise = slowsandGravelNoiseGen.generateNoiseOctaves(slowsandNoise, par1 * 16, par2 * 16, 0, 16, 16, 1, d0, d0, 1.0D);
+		 gravelNoise = slowsandGravelNoiseGen.generateNoiseOctaves(gravelNoise, par1 * 16, 109, par2 * 16, 16, 1, 16, d0, 1.0D, d0);
+		 netherrackExclusivityNoise = netherrackExculsivityNoiseGen.generateNoiseOctaves(netherrackExclusivityNoise, par1 * 16, par2 * 16, 0, 16, 16, 1, d0 * 2.0D, d0 * 2.0D, d0 * 2.0D);
+
+		 for (int k = 0; k < 16; ++k)
+		 {
+			 for (int l = 0; l < 16; ++l)
+			 {
+				 BiomeGenBase biomegenbase = par4ArrayOfBiomeGenBase[l + k * 16];
+
+				 boolean flag = slowsandNoise[k + l * 16] + hellRNG.nextDouble() * 0.2D > 0.0D;
+				 boolean flag1 = gravelNoise[k + l * 16] + hellRNG.nextDouble() * 0.2D > 0.0D;
+				 int i1 = (int)(netherrackExclusivityNoise[k + l * 16] / 3.0D + 3.0D + hellRNG.nextDouble() * 0.25D);
+				 int j1 = -1;
+				 Block b1 = biomegenbase.topBlock;
+				 Block b2 = biomegenbase.fillerBlock;
+
+				 for (int k1 = 127; k1 >= 0; --k1)
+				 {
+					 int l1 = (l * 16 + k) * 128 + k1;
+
+					 if (k1 < 127 - hellRNG.nextInt(5) && k1 > 0 + hellRNG.nextInt(5))
+					 {
+						 Block b3 = blocks[l1];
+
+						 if (b3 == Blocks.air)
+						 {
+							 j1 = -1;
+						 }
+						 else if (b3 == Blocks.netherrack)
+						 {
+							 if (j1 == -1)
+							 {
+								 if (i1 <= 0)
+								 {
+									 b1 = Blocks.air;
+									 b2 = Blocks.netherrack;
+								 }
+								 else if (k1 >= b0 - 4 && k1 <= b0 + 1)
+								 {
+									 b1 = Blocks.netherrack;
+									 b2 = Blocks.netherrack;
+
+									 if (flag1)
+									 {
+										 b1 = Blocks.gravel;
+									 }
+
+									 if (flag1)
+									 {
+										 b2 = Blocks.netherrack;
+									 }
+
+									 if (flag)
+									 {
+										 b1 = Blocks.soul_sand;
+									 }
+
+									 if (flag)
+									 {
+										 b2 = Blocks.soul_sand;
+									 }
+								 }
+
+								 if (k1 < b0 && b1 == Blocks.air)
+								 {
+									 b1 = Blocks.lava;
+								 }
+
+								 j1 = i1;
+
+								 if (k1 >= b0 - 1)
+								 {
+									 blocks[l1] = b1;
+								 }
+								 else
+								 {
+									 blocks[l1] = b2;
+								 }
+							 }
+							 else if (j1 > 0)
+							 {
+								 --j1;
+								 blocks[l1] = b2;
+							 }
+						 }
+					 }
+					 else
+					 {
+						 blocks[l1] = Blocks.bedrock;
+					 }
+				 }
+			 }
+		 }
+	 }
+
+	 /**
+	  * loads or generates the chunk at the chunk location specified
+	  */
+	 @Override
+	 public Chunk loadChunk(int par1, int par2)
+	 {
+		 return this.provideChunk(par1, par2);
+	 }
+
+	 /**
+	  * Will return back a chunk, if it doesn't exist and its not a MP client it will generates all the blocks for the
+	  * specified chunk from the map seed and chunk seed
+	  */
+	 @Override
+	 public Chunk provideChunk(int par1, int par2)
+	 {
+		 hellRNG.setSeed(par1 * 341873128712L + par2 * 132897987541L);
+		 byte[] abyte = new byte[32768];
+		 Block[] blocks = new Block[32768];
+		 this.generateNetherTerrain(par1, par2, blocks);
+		 biomesForGeneration = worldObj.getWorldChunkManager().loadBlockGeneratorData(biomesForGeneration, par1 * 16, par2 * 16, 16, 16);
+		 this.replaceBlocksForBiome(par1, par2, blocks, biomesForGeneration);
+		 netherCaveGenerator.func_151539_a(this, worldObj, par1, par2, blocks);
+		 genNetherBridge.func_151539_a(this, worldObj, par1, par2, blocks);
+		 Chunk chunk = new Chunk(worldObj, blocks, par1, par2);
+		 BiomeGenBase[] abiomegenbase = worldObj.getWorldChunkManager().loadBlockGeneratorData((BiomeGenBase[])null, par1 * 16, par2 * 16, 16, 16);
+		 byte[] abyte1 = chunk.getBiomeArray();
+
+		 for (int k = 0; k < abyte1.length; ++k)
+		 {
+			 abyte1[k] = (byte)abiomegenbase[k].biomeID;
+		 }
+
+		 chunk.resetRelightChecks();
+		 return chunk;
+	 }
+
+	 /**
+	  * generates a subset of the level's terrain data. Takes 7 arguments: the [empty] noise array, the position, and the
+	  * size.
+	  */
+	 private double[] initializeNoiseField(double[] par1ArrayOfDouble, int par2, int par3, int par4, int par5, int par6, int par7)
+	 {
+		 //ChunkProviderEvent.InitNoiseField event = new ChunkProviderEvent.InitNoiseField(this, par1ArrayOfDouble, par2, par3, par4, par5, par6, par7);
+		 //MinecraftForge.EVENT_BUS.post(event);
+		 //if (event.getResult() == Result.DENY) return event.noisefield;
+		 
+		 if (par1ArrayOfDouble == null)
+		 {
+			 par1ArrayOfDouble = new double[par5 * par6 * par7];
+		 }
+
+		 double d0 = 684.412D;
+		 double d1 = 2053.236D;
+		 noiseData4 = netherNoiseGen6.generateNoiseOctaves(noiseData4, par2, par3, par4, par5, 1, par7, 1.0D, 0.0D, 1.0D);
+		 noiseData5 = netherNoiseGen7.generateNoiseOctaves(noiseData5, par2, par3, par4, par5, 1, par7, 100.0D, 0.0D, 100.0D);
+		 noiseData1 = netherNoiseGen3.generateNoiseOctaves(noiseData1, par2, par3, par4, par5, par6, par7, d0 / 80.0D, d1 / 60.0D, d0 / 80.0D);
+		 noiseData2 = netherNoiseGen1.generateNoiseOctaves(noiseData2, par2, par3, par4, par5, par6, par7, d0, d1, d0);
+		 noiseData3 = netherNoiseGen2.generateNoiseOctaves(noiseData3, par2, par3, par4, par5, par6, par7, d0, d1, d0);
+		 int k1 = 0;
+		 int l1 = 0;
+		 double[] adouble1 = new double[par6];
+		 int i2;
+
+		 for (i2 = 0; i2 < par6; ++i2)
+		 {
+			 adouble1[i2] = Math.cos(i2 * Math.PI * 6.0D / par6) * 2.0D;
+			 double d2 = i2;
+
+			 if (i2 > par6 / 2)
+			 {
+				 d2 = par6 - 1 - i2;
+			 }
+
+			 if (d2 < 4.0D)
+			 {
+				 d2 = 4.0D - d2;
+				 adouble1[i2] -= d2 * d2 * d2 * 10.0D;
+			 }
+		 }
+
+		 for (i2 = 0; i2 < par5; ++i2)
+		 {
+			 for (int j2 = 0; j2 < par7; ++j2)
+			 {
+				 double d3 = (noiseData4[l1] + 256.0D) / 512.0D;
+
+				 if (d3 > 1.0D)
+				 {
+					 d3 = 1.0D;
+				 }
+
+				 double d4 = 0.0D;
+				 double d5 = noiseData5[l1] / 8000.0D;
+
+				 if (d5 < 0.0D)
+				 {
+					 d5 = -d5;
+				 }
+
+				 d5 = d5 * 3.0D - 3.0D;
+
+				 if (d5 < 0.0D)
+				 {
+					 d5 /= 2.0D;
+
+					 if (d5 < -1.0D)
+					 {
+						 d5 = -1.0D;
+					 }
+
+					 d5 /= 1.4D;
+					 d5 /= 2.0D;
+					 d3 = 0.0D;
+				 }
+				 else
+				 {
+					 if (d5 > 1.0D)
+					 {
+						 d5 = 1.0D;
+					 }
+
+					 d5 /= 6.0D;
+				 }
+
+				 d3 += 0.5D;
+				 d5 = d5 * par6 / 16.0D;
+				 ++l1;
+
+				 for (int k2 = 0; k2 < par6; ++k2)
+				 {
+					 double d6 = 0.0D;
+					 double d7 = adouble1[k2];
+					 double d8 = noiseData2[k1] / 512.0D;
+					 double d9 = noiseData3[k1] / 512.0D;
+					 double d10 = (noiseData1[k1] / 10.0D + 1.0D) / 2.0D;
+
+					 if (d10 < 0.0D)
+					 {
+						 d6 = d8;
+					 }
+					 else if (d10 > 1.0D)
+					 {
+						 d6 = d9;
+					 }
+					 else
+					 {
+						 d6 = d8 + (d9 - d8) * d10;
+					 }
+
+					 d6 -= d7;
+					 double d11;
+
+					 if (k2 > par6 - 4)
+					 {
+						 d11 = (k2 - (par6 - 4)) / 3.0F;
+						 d6 = d6 * (1.0D - d11) + -10.0D * d11;
+					 }
+
+					 if (k2 < d4)
+					 {
+						 d11 = (d4 - k2) / 4.0D;
+
+						 if (d11 < 0.0D)
+						 {
+							 d11 = 0.0D;
+						 }
+
+						 if (d11 > 1.0D)
+						 {
+							 d11 = 1.0D;
+						 }
+
+						 d6 = d6 * (1.0D - d11) + -10.0D * d11;
+					 }
+
+					 par1ArrayOfDouble[k1] = d6;
+					 ++k1;
+				 }
+			 }
+		 }
+
+		 return par1ArrayOfDouble;
+	 }
+
+	 /**
+	  * Checks to see if a chunk exists at x, y
+	  */
+	 @Override
+	 public boolean chunkExists(int par1, int par2)
+	 {
+		 return true;
+	 }
+
+	 /**
+	  * Populates chunk with ores etc etc
+	  */
+	 @Override
+	 public void populate(IChunkProvider par1IChunkProvider, int par2, int par3)
+	 {
+		 BlockFalling.field_149832_M = true;
+
+		 MinecraftForge.EVENT_BUS.post(new PopulateChunkEvent.Pre(par1IChunkProvider, worldObj, hellRNG, par2, par3, false));
+
+		 int k = par2 * 16;
+		 int l = par3 * 16;
+		 BiomeGenBase var6 = worldObj.getBiomeGenForCoords(k + 16, l + 16);
+
+		 genNetherBridge.generateStructuresInChunk(worldObj, hellRNG, par2, par3);
+		 int i1;
+		 int j1;
+		 int k1;
+		 int l1;
+
+		 boolean doGen = TerrainGen.populate(par1IChunkProvider, worldObj, hellRNG, par2, par3, false, NETHER_LAVA);
+		 for (i1 = 0; doGen && i1 < 8; ++i1)
+		 {
+			 j1 = k + hellRNG.nextInt(16) + 8;
+			 k1 = hellRNG.nextInt(120) + 4;
+			 l1 = l + hellRNG.nextInt(16) + 8;
+			 (new WorldGenHellLava(Blocks.lava, false)).generate(worldObj, hellRNG, j1, k1, l1);
+		 }
+
+		 i1 = hellRNG.nextInt(hellRNG.nextInt(10) + 1) + 1;
+		 int i2;
+
+		 doGen = TerrainGen.populate(par1IChunkProvider, worldObj, hellRNG, par2, par3, false, FIRE);
+		 for (j1 = 0; doGen && j1 < i1; ++j1)
+		 {
+			 k1 = k + hellRNG.nextInt(16) + 8;
+			 l1 = hellRNG.nextInt(120) + 4;
+			 i2 = l + hellRNG.nextInt(16) + 8;
+			 (new WorldGenFire()).generate(worldObj, hellRNG, k1, l1, i2);
+		 }
+
+		 i1 = hellRNG.nextInt(hellRNG.nextInt(10) + 1);
+
+		 doGen = TerrainGen.populate(par1IChunkProvider, worldObj, hellRNG, par2, par3, false, GLOWSTONE);
+		 for (j1 = 0; doGen && j1 < i1; ++j1)
+		 {
+			 k1 = k + hellRNG.nextInt(16) + 8;
+			 l1 = hellRNG.nextInt(120) + 4;
+			 i2 = l + hellRNG.nextInt(16) + 8;
+			 (new WorldGenGlowStone1()).generate(worldObj, hellRNG, k1, l1, i2);
+		 }
+
+		 for (j1 = 0; doGen && j1 < 10; ++j1)
+		 {
+			 k1 = k + hellRNG.nextInt(16) + 8;
+			 l1 = hellRNG.nextInt(128);
+			 i2 = l + hellRNG.nextInt(16) + 8;
+			 (new WorldGenGlowStone2()).generate(worldObj, hellRNG, k1, l1, i2);
+		 }
+
+		 MinecraftForge.EVENT_BUS.post(new DecorateBiomeEvent.Pre(worldObj, hellRNG, k, l));
+
+		 doGen = TerrainGen.decorate(worldObj, hellRNG, k, l, SHROOM);
+		 if (doGen && hellRNG.nextInt(1) == 0)
+		 {
+			 j1 = k + hellRNG.nextInt(16) + 8;
+			 k1 = hellRNG.nextInt(128);
+			 l1 = l + hellRNG.nextInt(16) + 8;
+			 (new WorldGenFlowers(Blocks.brown_mushroom)).generate(worldObj, hellRNG, j1, k1, l1);
+		 }
+
+		 if (doGen && hellRNG.nextInt(1) == 0)
+		 {
+			 j1 = k + hellRNG.nextInt(16) + 8;
+			 k1 = hellRNG.nextInt(128);
+			 l1 = l + hellRNG.nextInt(16) + 8;
+			 (new WorldGenFlowers(Blocks.red_mushroom)).generate(worldObj, hellRNG, j1, k1, l1);
+		 }
+
+		 WorldGenMinable worldgenminable = new WorldGenMinable(Blocks.quartz_ore, 13, Blocks.netherrack);
+		 int j2;
+
+		 for (k1 = 0; k1 < 16; ++k1)
+		 {
+			 l1 = k + hellRNG.nextInt(16);
+			 i2 = hellRNG.nextInt(108) + 10;
+			 j2 = l + hellRNG.nextInt(16);
+			 worldgenminable.generate(worldObj, hellRNG, l1, i2, j2);
+		 }
+
+		 for (k1 = 0; k1 < 16; ++k1)
+		 {
+			 l1 = k + hellRNG.nextInt(16);
+			 i2 = hellRNG.nextInt(108) + 10;
+			 j2 = l + hellRNG.nextInt(16);
+			 (new WorldGenHellLava(Blocks.flowing_lava, true)).generate(worldObj, hellRNG, l1, i2, j2);
+		 }
+
+		 MinecraftForge.EVENT_BUS.post(new DecorateBiomeEvent.Post(worldObj, hellRNG, k, l));
+
+		 //var6.decorate(worldObj, hellRNG, k, l);
+
+		 MinecraftForge.EVENT_BUS.post(new PopulateChunkEvent.Post(par1IChunkProvider, worldObj, hellRNG, par2, par3, false));
+
+		 BlockFalling.field_149832_M = false;
+	 }
+
+	 /**
+	  * Two modes of operation: if passed true, save all Chunks in one go.  If passed false, save up to two chunks.
+	  * Return true if all chunks have been saved.
+	  */
+	 @Override
+	 public boolean saveChunks(boolean par1, IProgressUpdate par2IProgressUpdate)
+	 {
+		 return true;
+	 }
+
+	 /**
+	  * Unloads chunks that are marked to be unloaded. This is not guaranteed to unload every such chunk.
+	  */
+	 @Override
+	 public boolean unloadQueuedChunks()
+	 {
+		 return false;
+	 }
+
+	 /**
+	  * Returns if the IChunkProvider supports saving.
+	  */
+	 @Override
+	 public boolean canSave()
+	 {
+		 return true;
+	 }
+
+	 /**
+	  * Converts the instance data to a readable string.
+	  */
+	 @Override
+	 public String makeString()
+	 {
+		 return "HellRandomLevelSource";
+	 }
+
+	 /**
+	  * Returns a list of creatures of the specified type that can spawn at the given location.
+	  */
+	 @Override
+	 public List getPossibleCreatures(EnumCreatureType par1EnumCreatureType, int par2, int par3, int par4)
+	 {
+		 if (par1EnumCreatureType == EnumCreatureType.monster && genNetherBridge.hasStructureAt(par2, par3, par4))
+			 return genNetherBridge.getSpawnList();
+		 else
+		 {
+			 BiomeGenBase biomegenbase = worldObj.getBiomeGenForCoords(par2, par4);
+			 return biomegenbase == null ? null : biomegenbase.getSpawnableList(par1EnumCreatureType);
+		 }
+	 }
+
+	 /**
+	  * Returns the location of the closest structure of the specified type. If not found returns null.
+	  */
+	 //@Override
+	 //public ChunkPosition findClosestStructure(World par1World, String par2Str, int par3, int par4, int par5)
+	 //{
+	//	 return null;
+	 //}
+
+	 @Override
+	 public int getLoadedChunkCount()
+	 {
+		 return 0;
+	 }
+
+	 @Override
+	 public void recreateStructures(int par1, int par2)
+	 {
+		 genNetherBridge.func_151539_a(this, worldObj, par1, par2, (Block[])null);
+	 }
+
+	@Override
+	public void saveExtraData() 
+	{
+	}
+
+	@Override
+	public ChunkPosition func_147416_a(World par1World, String par2Str, int par3, int par4, int par5) {
+		return null;
+	}
+}
\ No newline at end of file
diff --git a/src/main/java/biomesoplenty/common/world/WorldChunkManagerBOPHell.java b/src/main/java/biomesoplenty/common/world/WorldChunkManagerBOPHell.java
new file mode 100644
index 000000000..6aa985b69
--- /dev/null
+++ b/src/main/java/biomesoplenty/common/world/WorldChunkManagerBOPHell.java
@@ -0,0 +1,281 @@
+package biomesoplenty.common.world;
+
+import java.util.List;
+import java.util.Random;
+
+import biomesoplenty.common.helpers.BiomeCacheHell;
+import biomesoplenty.common.world.layer.hell.BiomeLayerHell;
+import net.minecraft.world.ChunkPosition;
+import net.minecraft.world.World;
+import net.minecraft.world.WorldType;
+import net.minecraft.world.biome.BiomeGenBase;
+import net.minecraft.world.biome.WorldChunkManager;
+import net.minecraft.world.gen.layer.GenLayer;
+import net.minecraft.world.gen.layer.IntCache;
+import cpw.mods.fml.relauncher.Side;
+import cpw.mods.fml.relauncher.SideOnly;
+
+public class WorldChunkManagerBOPHell extends WorldChunkManager
+{
+	private GenLayer genBiomes;
+	private GenLayer biomeIndexLayer;
+	private BiomeCacheHell biomeCache;
+
+	@SuppressWarnings("rawtypes")
+	private List biomesToSpawnIn;
+
+	@SuppressWarnings({ "unchecked", "rawtypes" })
+	protected WorldChunkManagerBOPHell()
+	{
+		biomeCache = new BiomeCacheHell(this);
+	}
+
+	public WorldChunkManagerBOPHell(long par1, WorldType par3WorldType)
+	{
+		this();
+		GenLayer[] var4 = BiomeLayerHell.initializeAllBiomeGenerators(par1, par3WorldType, 1);
+		//var4 = getModdedBiomeGenerators(par3WorldType, par1, var4);
+		genBiomes = var4[0];
+		biomeIndexLayer = var4[1];
+	}
+
+	public WorldChunkManagerBOPHell(World par1World)
+	{
+		this(par1World.getSeed(), par1World.getWorldInfo().getTerrainType());
+	}
+
+	/**
+	 * Gets the list of valid biomes for the player to spawn in.
+	 */
+	@Override
+	@SuppressWarnings("rawtypes")
+	public List getBiomesToSpawnIn()
+	{
+		return biomesToSpawnIn;
+	}
+
+	/**
+	 * Returns the BiomeGenBase related to the x, z position on the world.
+	 */
+	@Override
+	public BiomeGenBase getBiomeGenAt(int par1, int par2)
+	{
+		return biomeCache.getBiomeGenAt(par1, par2);
+	}
+
+	/**
+	 * Returns a list of rainfall values for the specified blocks. Args: listToReuse, x, z, width, length.
+	 */
+	@Override
+	public float[] getRainfall(float[] par1ArrayOfFloat, int par2, int par3, int par4, int par5)
+	{
+		IntCache.resetIntCache();
+
+		if (par1ArrayOfFloat == null || par1ArrayOfFloat.length < par4 * par5)
+		{
+			par1ArrayOfFloat = new float[par4 * par5];
+		}
+
+		int[] var6 = biomeIndexLayer.getInts(par2, par3, par4, par5);
+
+		for (int var7 = 0; var7 < par4 * par5; ++var7)
+		{
+			float var8 = BiomeGenBase.func_150565_n()[var6[var7]].getIntRainfall() / 65536.0F;
+
+			if (var8 > 1.0F)
+			{
+				var8 = 1.0F;
+			}
+
+			par1ArrayOfFloat[var7] = var8;
+		}
+
+		return par1ArrayOfFloat;
+	}
+
+	@Override
+	@SideOnly(Side.CLIENT)
+
+	/**
+	 * Return an adjusted version of a given temperature based on the y height
+	 */
+	public float getTemperatureAtHeight(float par1, int par2)
+	{
+		return par1;
+	}
+
+	/**
+	 * Returns a list of temperatures to use for the specified blocks.  Args: listToReuse, x, y, width, length
+	 */
+	//@Override
+	public float[] getTemperatures(float[] par1ArrayOfFloat, int par2, int par3, int par4, int par5)
+	{
+		IntCache.resetIntCache();
+
+		if (par1ArrayOfFloat == null || par1ArrayOfFloat.length < par4 * par5)
+		{
+			par1ArrayOfFloat = new float[par4 * par5];
+		}
+
+		int[] var6 = biomeIndexLayer.getInts(par2, par3, par4, par5);
+
+		for (int var7 = 0; var7 < par4 * par5; ++var7)
+		{
+			float var8 = BiomeGenBase.func_150565_n()[var6[var7]].temperature / 65536.0F;
+
+			if (var8 > 1.0F)
+			{
+				var8 = 1.0F;
+			}
+
+			par1ArrayOfFloat[var7] = var8;
+		}
+
+		return par1ArrayOfFloat;
+	}
+
+	/**
+	 * Returns an array of biomes for the location input.
+	 */
+	@Override
+	public BiomeGenBase[] getBiomesForGeneration(BiomeGenBase[] par1ArrayOfBiomeGenBase, int par2, int par3, int par4, int par5)
+	{
+		IntCache.resetIntCache();
+
+		if (par1ArrayOfBiomeGenBase == null || par1ArrayOfBiomeGenBase.length < par4 * par5)
+		{
+			par1ArrayOfBiomeGenBase = new BiomeGenBase[par4 * par5];
+		}
+
+		int[] var6 = genBiomes.getInts(par2, par3, par4, par5);
+
+		for (int var7 = 0; var7 < par4 * par5; ++var7)
+		{
+			par1ArrayOfBiomeGenBase[var7] = BiomeGenBase.func_150565_n()[var6[var7]];
+		}
+
+		return par1ArrayOfBiomeGenBase;
+	}
+
+	/**
+	 * Returns biomes to use for the blocks and loads the other data like temperature and humidity onto the
+	 * WorldChunkManager Args: oldBiomeList, x, z, width, depth
+	 */
+	@Override
+	public BiomeGenBase[] loadBlockGeneratorData(BiomeGenBase[] par1ArrayOfBiomeGenBase, int par2, int par3, int par4, int par5)
+	{
+		return this.getBiomeGenAt(par1ArrayOfBiomeGenBase, par2, par3, par4, par5, true);
+	}
+
+	/**
+	 * Return a list of biomes for the specified blocks. Args: listToReuse, x, y, width, length, cacheFlag (if false,
+	 * don't check biomeCache to avoid infinite loop in BiomeCacheBlock)
+	 */
+	@Override
+	public BiomeGenBase[] getBiomeGenAt(BiomeGenBase[] par1ArrayOfBiomeGenBase, int par2, int par3, int par4, int par5, boolean par6)
+	{
+		IntCache.resetIntCache();
+
+		if (par1ArrayOfBiomeGenBase == null || par1ArrayOfBiomeGenBase.length < par4 * par5)
+		{
+			par1ArrayOfBiomeGenBase = new BiomeGenBase[par4 * par5];
+		}
+
+		if (par6 && par4 == 16 && par5 == 16 && (par2 & 15) == 0 && (par3 & 15) == 0)
+		{
+			BiomeGenBase[] var9 = biomeCache.getCachedBiomes(par2, par3);
+			System.arraycopy(var9, 0, par1ArrayOfBiomeGenBase, 0, par4 * par5);
+			return par1ArrayOfBiomeGenBase;
+		}
+		else
+		{
+			int[] var7 = biomeIndexLayer.getInts(par2, par3, par4, par5);
+
+			for (int var8 = 0; var8 < par4 * par5; ++var8)
+			{
+				par1ArrayOfBiomeGenBase[var8] = BiomeGenBase.func_150565_n()[var7[var8]];
+			}
+
+			return par1ArrayOfBiomeGenBase;
+		}
+	}
+
+	/**
+	 * checks given Chunk's Biomes against List of allowed ones
+	 */
+	@Override
+	@SuppressWarnings("rawtypes")
+	public boolean areBiomesViable(int par1, int par2, int par3, List par4List)
+	{
+		IntCache.resetIntCache();
+		int var5 = par1 - par3 >> 2;
+			int var6 = par2 - par3 >> 2;
+		int var7 = par1 + par3 >> 2;
+		int var8 = par2 + par3 >> 2;
+		int var9 = var7 - var5 + 1;
+		int var10 = var8 - var6 + 1;
+		int[] var11 = genBiomes.getInts(var5, var6, var9, var10);
+
+		for (int var12 = 0; var12 < var9 * var10; ++var12)
+		{
+			BiomeGenBase var13 = BiomeGenBase.func_150565_n()[var11[var12]];
+
+			if (!par4List.contains(var13))
+				return false;
+		}
+
+		return true;
+	}
+
+	/**
+	 * Finds a valid position within a range, that is in one of the listed biomes. Searches {par1,par2} +-par3 blocks.
+	 * Strongly favors positive y positions.
+	 */
+	@Override
+	@SuppressWarnings("rawtypes")
+	//TODO: findBiomePosition
+	public ChunkPosition func_150795_a(int par1, int par2, int par3, List par4List, Random par5Random)
+	{
+		IntCache.resetIntCache();
+		int var6 = par1 - par3 >> 2;
+		int var7 = par2 - par3 >> 2;
+		int var8 = par1 + par3 >> 2;
+		int var9 = par2 + par3 >> 2;
+		int var10 = var8 - var6 + 1;
+		int var11 = var9 - var7 + 1;
+		int[] var12 = genBiomes.getInts(var6, var7, var10, var11);
+		ChunkPosition var13 = null;
+		int var14 = 0;
+
+		for (int var15 = 0; var15 < var10 * var11; ++var15)
+		{
+			int var16 = var6 + var15 % var10 << 2;
+			int var17 = var7 + var15 / var10 << 2;
+			BiomeGenBase var18 = BiomeGenBase.func_150565_n()[var12[var15]];
+
+			if (par4List.contains(var18) && (var13 == null || par5Random.nextInt(var14 + 1) == 0))
+			{
+				var13 = new ChunkPosition(var16, 0, var17);
+				++var14;
+			}
+		}
+
+		return var13;
+	}
+
+	/**
+	 * Calls the WorldChunkManager's biomeCache.cleanupCache()
+	 */
+	@Override
+	public void cleanupCache()
+	{
+		biomeCache.cleanupCache();
+	}
+
+	//public GenLayer[] getModdedBiomeGenerators(WorldType worldType, long seed, GenLayer[] original)
+	//{
+	//    WorldTypeEvent.InitBiomeGens event = new WorldTypeEvent.InitBiomeGens(worldType, seed, original);
+	//    MinecraftForge.TERRAIN_GEN_BUS.post(event);
+	//    return event.newBiomeGens;
+	//}
+}
\ No newline at end of file
diff --git a/src/main/java/biomesoplenty/common/world/WorldProviderBopHell.java b/src/main/java/biomesoplenty/common/world/WorldProviderBopHell.java
new file mode 100644
index 000000000..1d2762a92
--- /dev/null
+++ b/src/main/java/biomesoplenty/common/world/WorldProviderBopHell.java
@@ -0,0 +1,38 @@
+package biomesoplenty.common.world;
+
+import net.minecraft.world.WorldProviderHell;
+import net.minecraft.world.chunk.IChunkProvider;
+import cpw.mods.fml.common.Loader;
+
+public class WorldProviderBopHell extends WorldProviderHell
+{
+    @Override
+	public void registerWorldChunkManager()
+    {
+		this.worldChunkMgr = new WorldChunkManagerBOPHell(worldObj);
+        this.isHellWorld = true;
+        this.hasNoSky = true;
+        this.dimensionId = -1;
+    }
+
+	@Override
+	public IChunkProvider createChunkGenerator()
+	{
+		/*
+		if (Loader.isModLoaded("Natura"))
+		{
+			try 
+			{
+				return new ChunkProviderBOPNaturaHell(this.worldObj, this.worldObj.getSeed());
+			}
+			catch (Exception e) 
+			{
+				System.out.println("[BiomesOPlenty] There was an error while integrating Natura with Biomes O' Plenty!");
+				e.printStackTrace(System.err);
+			}
+		}
+		*/
+		
+		return new ChunkProviderBOPHell(this.worldObj, this.worldObj.getSeed());
+	}
+}
\ No newline at end of file
diff --git a/src/main/java/biomesoplenty/common/world/layer/hell/BiomeLayerHell.java b/src/main/java/biomesoplenty/common/world/layer/hell/BiomeLayerHell.java
new file mode 100644
index 000000000..7b5c84781
--- /dev/null
+++ b/src/main/java/biomesoplenty/common/world/layer/hell/BiomeLayerHell.java
@@ -0,0 +1,43 @@
+package biomesoplenty.common.world.layer.hell;
+
+import net.minecraft.world.WorldType;
+import net.minecraft.world.gen.layer.GenLayer;
+import net.minecraftforge.common.MinecraftForge;
+import net.minecraftforge.event.terraingen.WorldTypeEvent;
+
+public abstract class BiomeLayerHell extends GenLayer
+{
+	public static GenLayer[] initializeAllBiomeGenerators(long seed, WorldType worldtype, int dim)
+	{
+		int biomesize = 3;
+		if(dim == 1)
+		{
+			biomesize = 2;
+		}
+
+		//Hell and promised biome gen
+		BiomeLayerHell obj = new BiomeLayerHellCreate(1L, false);
+		obj = new BiomeLayerHellFuzzyZoom(2000L, (obj));
+		for(int i = 1; i < 3; i++) { obj = new BiomeLayerHellZoom(2000L + i, (obj)); }
+		obj = BiomeLayerHellZoom.func_75915_a(1000L, ((obj)), 0);
+		obj = new BiomeLayerHellBiomes(200L, ((obj)));
+		obj = BiomeLayerHellZoom.func_75915_a(1000L, ((obj)), 2);
+		for(int j = 0; j < biomesize; j++) { obj = new BiomeLayerHellZoom(1000L + j, (obj)); }
+		BiomeLayerHellVoronoiZoom genlayervoronoizoom = new BiomeLayerHellVoronoiZoom(10L, ((obj)));
+		(obj).initWorldGenSeed(seed);
+		genlayervoronoizoom.initWorldGenSeed(seed);
+		return (new GenLayer[] { obj, genlayervoronoizoom });
+	}
+
+	public BiomeLayerHell(long seed)
+	{
+	    super(seed);
+	}
+
+	public static byte getModdedBiomeSize(WorldType worldType, byte original)
+	{
+		WorldTypeEvent.BiomeSize event = new WorldTypeEvent.BiomeSize(worldType, original);
+		MinecraftForge.TERRAIN_GEN_BUS.post(event);
+		return event.newSize;
+	}
+}
\ No newline at end of file
diff --git a/src/main/java/biomesoplenty/common/world/layer/hell/BiomeLayerHellBiomes.java b/src/main/java/biomesoplenty/common/world/layer/hell/BiomeLayerHellBiomes.java
new file mode 100644
index 000000000..fd75846f6
--- /dev/null
+++ b/src/main/java/biomesoplenty/common/world/layer/hell/BiomeLayerHellBiomes.java
@@ -0,0 +1,49 @@
+package biomesoplenty.common.world.layer.hell;
+
+import java.util.ArrayList;
+
+import net.minecraft.world.WorldType;
+import net.minecraft.world.biome.BiomeGenBase;
+import net.minecraft.world.gen.layer.IntCache;
+import biomesoplenty.api.BOPBiomeHelper;
+
+public class BiomeLayerHellBiomes extends BiomeLayerHell
+{
+	private int dimension = 0; 
+	
+	private static ArrayList<BiomeGenBase> netherBiomes = new ArrayList<BiomeGenBase>();
+	
+    public BiomeLayerHellBiomes(long par1, BiomeLayerHell par3GenLayer)
+    {
+        super(par1);
+		parent = par3GenLayer;
+
+		//NETHER BIOMES
+		
+		//add biomes to netherBiomes array here
+
+		if (netherBiomes.size() == 0)
+		{
+			netherBiomes.add(BiomeGenBase.hell);
+		}
+	} 
+
+    @Override
+	public int[] getInts(int par1, int par2, int par3, int par4)
+    {
+        int[] var5 = this.parent.getInts(par1, par2, par3, par4);
+        int[] var6 = IntCache.getIntCache(par3 * par4);
+
+        for (int var7 = 0; var7 < par4; ++var7)
+        {
+            for (int var8 = 0; var8 < par3; ++var8)
+            {
+                this.initChunkSeed((long)(var8 + par1), (long)(var7 + par2));
+                int var9 = var5[var8 + var7 * par3];
+				
+				var6[var8 + var7 * par3] = netherBiomes.get(this.nextInt(netherBiomes.size())).biomeID;
+            }
+        }
+        return var6;
+    }
+}
\ No newline at end of file
diff --git a/src/main/java/biomesoplenty/common/world/layer/hell/BiomeLayerHellCreate.java b/src/main/java/biomesoplenty/common/world/layer/hell/BiomeLayerHellCreate.java
new file mode 100644
index 000000000..63a3d5412
--- /dev/null
+++ b/src/main/java/biomesoplenty/common/world/layer/hell/BiomeLayerHellCreate.java
@@ -0,0 +1,28 @@
+package biomesoplenty.common.world.layer.hell;
+
+import net.minecraft.world.gen.layer.IntCache;
+
+public class BiomeLayerHellCreate extends BiomeLayerHell
+{
+	public BiomeLayerHellCreate(long par1, boolean o)
+	{
+		super(par1);
+	}
+
+	@Override
+	public int[] getInts(int par1, int par2, int par3, int par4)
+	{
+		int[] var5 = IntCache.getIntCache(par3 * par4);
+
+		for (int var6 = 0; var6 < par4; ++var6)
+		{
+			for (int var7 = 0; var7 < par3; ++var7)
+			{
+				this.initChunkSeed(par1 + var7, par2 + var6);
+				var5[var7 + var6 * par3] = 1;
+			}
+		}
+
+		return var5;
+	}
+}
\ No newline at end of file
diff --git a/src/main/java/biomesoplenty/common/world/layer/hell/BiomeLayerHellFuzzyZoom.java b/src/main/java/biomesoplenty/common/world/layer/hell/BiomeLayerHellFuzzyZoom.java
new file mode 100644
index 000000000..397b739c5
--- /dev/null
+++ b/src/main/java/biomesoplenty/common/world/layer/hell/BiomeLayerHellFuzzyZoom.java
@@ -0,0 +1,76 @@
+package biomesoplenty.common.world.layer.hell;
+
+import net.minecraft.world.gen.layer.IntCache;
+
+public class BiomeLayerHellFuzzyZoom extends BiomeLayerHell
+{
+	public BiomeLayerHellFuzzyZoom(long par1, BiomeLayerHell par3GenLayer)
+	{
+		super(par1);
+		super.parent = par3GenLayer;
+	}
+
+	/**
+	 * Returns a list of integer values generated by this layer. These may be interpreted as temperatures, rainfall
+	 * amounts, or biomeList[] indices based on the particular GenLayer subclass.
+	 */
+	@Override
+	public int[] getInts(int par1, int par2, int par3, int par4)
+	{
+		int i1 = par1 >> 1;
+		int j1 = par2 >> 1;
+		int k1 = (par3 >> 1) + 3;
+		int l1 = (par4 >> 1) + 3;
+		int[] aint = parent.getInts(i1, j1, k1, l1);
+		int[] aint1 = IntCache.getIntCache(k1 * 2 * l1 * 2);
+		int i2 = k1 << 1;
+		int j2;
+
+		for (int k2 = 0; k2 < l1 - 1; ++k2)
+		{
+			j2 = k2 << 1;
+			int l2 = j2 * i2;
+			int i3 = aint[0 + (k2 + 0) * k1];
+			int j3 = aint[0 + (k2 + 1) * k1];
+
+			for (int k3 = 0; k3 < k1 - 1; ++k3)
+			{
+				this.initChunkSeed(k3 + i1 << 1, k2 + j1 << 1);
+				int l3 = aint[k3 + 1 + (k2 + 0) * k1];
+				int i4 = aint[k3 + 1 + (k2 + 1) * k1];
+				aint1[l2] = i3;
+				aint1[l2++ + i2] = this.choose(i3, j3);
+				aint1[l2] = this.choose(i3, l3);
+				aint1[l2++ + i2] = this.choose(i3, l3, j3, i4);
+				i3 = l3;
+				j3 = i4;
+			}
+		}
+
+		int[] aint2 = IntCache.getIntCache(par3 * par4);
+
+		for (j2 = 0; j2 < par4; ++j2)
+		{
+			System.arraycopy(aint1, (j2 + (par2 & 1)) * (k1 << 1) + (par1 & 1), aint2, j2 * par3, par3);
+		}
+
+		return aint2;
+	}
+
+	/**
+	 * randomly choose between the two args
+	 */
+	protected int choose(int par1, int par2)
+	{
+		return this.nextInt(2) == 0 ? par1 : par2;
+	}
+
+	/**
+	 * randomly choose between the four args
+	 */
+	protected int choose(int par1, int par2, int par3, int par4)
+	{
+		int i1 = this.nextInt(4);
+		return i1 == 0 ? par1 : (i1 == 1 ? par2 : (i1 == 2 ? par3 : par4));
+	}
+}
\ No newline at end of file
diff --git a/src/main/java/biomesoplenty/common/world/layer/hell/BiomeLayerHellVoronoiZoom.java b/src/main/java/biomesoplenty/common/world/layer/hell/BiomeLayerHellVoronoiZoom.java
new file mode 100644
index 000000000..0c50e0b21
--- /dev/null
+++ b/src/main/java/biomesoplenty/common/world/layer/hell/BiomeLayerHellVoronoiZoom.java
@@ -0,0 +1,101 @@
+package biomesoplenty.common.world.layer.hell;
+
+import net.minecraft.world.gen.layer.IntCache;
+
+public class BiomeLayerHellVoronoiZoom extends BiomeLayerHell
+{
+	public BiomeLayerHellVoronoiZoom(long par1, BiomeLayerHell par3GenLayer)
+	{
+		super(par1);
+		super.parent = par3GenLayer;
+	}
+
+	/**
+	 * Returns a list of integer values generated by this layer. These may be interpreted as temperatures, rainfall
+	 * amounts, or biomeList[] indices based on the particular GenLayer subclass.
+	 */
+	@Override
+	public int[] getInts(int par1, int par2, int par3, int par4)
+	{
+		par1 -= 2;
+		par2 -= 2;
+		byte b0 = 2;
+		int i1 = 1 << b0;
+		int j1 = par1 >> b0;
+		int k1 = par2 >> b0;
+		int l1 = (par3 >> b0) + 3;
+		int i2 = (par4 >> b0) + 3;
+		int[] aint = parent.getInts(j1, k1, l1, i2);
+		int j2 = l1 << b0;
+		int k2 = i2 << b0;
+		int[] aint1 = IntCache.getIntCache(j2 * k2);
+		int l2;
+
+		for (int i3 = 0; i3 < i2 - 1; ++i3)
+		{
+			l2 = aint[0 + (i3 + 0) * l1];
+			int j3 = aint[0 + (i3 + 1) * l1];
+
+			for (int k3 = 0; k3 < l1 - 1; ++k3)
+			{
+				double d0 = i1 * 0.9D;
+				this.initChunkSeed(k3 + j1 << b0, i3 + k1 << b0);
+				double d1 = (this.nextInt(1024) / 1024.0D - 0.5D) * d0;
+				double d2 = (this.nextInt(1024) / 1024.0D - 0.5D) * d0;
+				this.initChunkSeed(k3 + j1 + 1 << b0, i3 + k1 << b0);
+				double d3 = (this.nextInt(1024) / 1024.0D - 0.5D) * d0 + i1;
+				double d4 = (this.nextInt(1024) / 1024.0D - 0.5D) * d0;
+				this.initChunkSeed(k3 + j1 << b0, i3 + k1 + 1 << b0);
+				double d5 = (this.nextInt(1024) / 1024.0D - 0.5D) * d0;
+				double d6 = (this.nextInt(1024) / 1024.0D - 0.5D) * d0 + i1;
+				this.initChunkSeed(k3 + j1 + 1 << b0, i3 + k1 + 1 << b0);
+				double d7 = (this.nextInt(1024) / 1024.0D - 0.5D) * d0 + i1;
+				double d8 = (this.nextInt(1024) / 1024.0D - 0.5D) * d0 + i1;
+				int l3 = aint[k3 + 1 + (i3 + 0) * l1];
+				int i4 = aint[k3 + 1 + (i3 + 1) * l1];
+
+				for (int j4 = 0; j4 < i1; ++j4)
+				{
+					int k4 = ((i3 << b0) + j4) * j2 + (k3 << b0);
+
+					for (int l4 = 0; l4 < i1; ++l4)
+					{
+						double d9 = (j4 - d2) * (j4 - d2) + (l4 - d1) * (l4 - d1);
+						double d10 = (j4 - d4) * (j4 - d4) + (l4 - d3) * (l4 - d3);
+						double d11 = (j4 - d6) * (j4 - d6) + (l4 - d5) * (l4 - d5);
+						double d12 = (j4 - d8) * (j4 - d8) + (l4 - d7) * (l4 - d7);
+
+						if (d9 < d10 && d9 < d11 && d9 < d12)
+						{
+							aint1[k4++] = l2;
+						}
+						else if (d10 < d9 && d10 < d11 && d10 < d12)
+						{
+							aint1[k4++] = l3;
+						}
+						else if (d11 < d9 && d11 < d10 && d11 < d12)
+						{
+							aint1[k4++] = j3;
+						}
+						else
+						{
+							aint1[k4++] = i4;
+						}
+					}
+				}
+
+				l2 = l3;
+				j3 = i4;
+			}
+		}
+
+		int[] aint2 = IntCache.getIntCache(par3 * par4);
+
+		for (l2 = 0; l2 < par4; ++l2)
+		{
+			System.arraycopy(aint1, (l2 + (par2 & i1 - 1)) * (l1 << b0) + (par1 & i1 - 1), aint2, l2 * par3, par3);
+		}
+
+		return aint2;
+	}
+}
\ No newline at end of file
diff --git a/src/main/java/biomesoplenty/common/world/layer/hell/BiomeLayerHellZoom.java b/src/main/java/biomesoplenty/common/world/layer/hell/BiomeLayerHellZoom.java
new file mode 100644
index 000000000..92b989101
--- /dev/null
+++ b/src/main/java/biomesoplenty/common/world/layer/hell/BiomeLayerHellZoom.java
@@ -0,0 +1,119 @@
+package biomesoplenty.common.world.layer.hell;
+
+import net.minecraft.world.gen.layer.IntCache;
+
+public class BiomeLayerHellZoom extends BiomeLayerHell
+{
+	public BiomeLayerHellZoom(long par1, BiomeLayerHell par3GenLayer)
+	{
+		super(par1);
+		super.parent = par3GenLayer;
+	}
+
+	@Override
+	public int[] getInts(int par1, int par2, int par3, int par4)
+	{
+		int i1 = par1 >> 1;
+		int j1 = par2 >> 1;
+		int k1 = (par3 >> 1) + 3;
+		int l1 = (par4 >> 1) + 3;
+		int[] aint = parent.getInts(i1, j1, k1, l1);
+		int[] aint1 = IntCache.getIntCache(k1 * 2 * l1 * 2);
+		int i2 = k1 << 1;
+		int j2;
+
+		for (int k2 = 0; k2 < l1 - 1; ++k2)
+		{
+			j2 = k2 << 1;
+			int l2 = j2 * i2;
+			int i3 = aint[0 + (k2 + 0) * k1];
+			int j3 = aint[0 + (k2 + 1) * k1];
+
+			for (int k3 = 0; k3 < k1 - 1; ++k3)
+			{
+				this.initChunkSeed(k3 + i1 << 1, k2 + j1 << 1);
+				int l3 = aint[k3 + 1 + (k2 + 0) * k1];
+				int i4 = aint[k3 + 1 + (k2 + 1) * k1];
+				aint1[l2] = i3;
+				aint1[l2++ + i2] = this.choose(i3, j3);
+				aint1[l2] = this.choose(i3, l3);
+				aint1[l2++ + i2] = this.modeOrRandom(i3, l3, j3, i4);
+				i3 = l3;
+				j3 = i4;
+			}
+		}
+
+		int[] aint2 = IntCache.getIntCache(par3 * par4);
+
+		for (j2 = 0; j2 < par4; ++j2)
+		{
+			System.arraycopy(aint1, (j2 + (par2 & 1)) * (k1 << 1) + (par1 & 1), aint2, j2 * par3, par3);
+		}
+
+		return aint2;
+	}
+
+	/**
+	 * Chooses one of the two inputs randomly.
+	 */
+	 protected int choose(int par1, int par2)
+	{
+		return this.nextInt(2) == 0 ? par1 : par2;
+	}
+
+	/**
+	 * returns the mode (most frequently occuring number) or a random number from the 4 integers provided
+	 */
+	 protected int modeOrRandom(int par1, int par2, int par3, int par4)
+	 {
+		 if (par2 == par3 && par3 == par4)
+			 return par2;
+		 else if (par1 == par2 && par1 == par3)
+			 return par1;
+		 else if (par1 == par2 && par1 == par4)
+			 return par1;
+		 else if (par1 == par3 && par1 == par4)
+			 return par1;
+		 else if (par1 == par2 && par3 != par4)
+			 return par1;
+		 else if (par1 == par3 && par2 != par4)
+			 return par1;
+		 else if (par1 == par4 && par2 != par3)
+			 return par1;
+		 else if (par2 == par1 && par3 != par4)
+			 return par2;
+		 else if (par2 == par3 && par1 != par4)
+			 return par2;
+		 else if (par2 == par4 && par1 != par3)
+			 return par2;
+		 else if (par3 == par1 && par2 != par4)
+			 return par3;
+		 else if (par3 == par2 && par1 != par4)
+			 return par3;
+		 else if (par3 == par4 && par1 != par2)
+			 return par3;
+		 else if (par4 == par1 && par2 != par3)
+			 return par3;
+		 else if (par4 == par2 && par1 != par3)
+			 return par3;
+		 else if (par4 == par3 && par1 != par2)
+			 return par3;
+		 else
+		 {
+			 int i1 = this.nextInt(4);
+			 return i1 == 0 ? par1 : (i1 == 1 ? par2 : (i1 == 2 ? par3 : par4));
+		 }
+	 }
+
+	 public static BiomeLayerHell func_75915_a(long par0, BiomeLayerHell par2GenLayer, int par3)
+	 {
+		 Object object = par2GenLayer;
+
+		 for (int k = 0; k < par3; ++k)
+		 {
+			 object = new BiomeLayerHellZoom(par0 + k, (BiomeLayerHell)object);
+		 }
+
+		 return (BiomeLayerHell)object;
+	 }
+}
\ No newline at end of file