I am working on a mod somewhat like LexManos's YUNoMakeGoodMap. I want it to make the default overworld spawn generation have the same island type thing as in the End, but I want it to spawn like the normal Overworld, where it has dirt, stone, and ores. I have been looking around for a little bit now, and found this class in the source code for the ChunkProviderEnd class:

 

    public void populate(IChunkProvider p_73153_1_, int p_73153_2_, int p_73153_3_)
    {
        BlockFalling.fallInstantly = true;

        MinecraftForge.EVENT_BUS.post(new PopulateChunkEvent.Pre(p_73153_1_, endWorld, endWorld.rand, p_73153_2_, p_73153_3_, false));

        int k = p_73153_2_ * 16;
        int l = p_73153_3_ * 16;
        BiomeGenBase biomegenbase = this.endWorld.getBiomeGenForCoords(k + 16, l + 16);
        biomegenbase.decorate(this.endWorld, this.endWorld.rand, k, l);

        MinecraftForge.EVENT_BUS.post(new PopulateChunkEvent.Post(p_73153_1_, endWorld, endWorld.rand, p_73153_2_, p_73153_3_, false));

        BlockFalling.fallInstantly = false;
    }

I know this is for the spawning of the End island, but I want the code like in the ChunkProviderGenerate#provideChunk function, where it gives you to code of the actual generation. This is also a big deal, because the ender dragon is spawning, and I definitely do not want that. Thank you for your time!

Its now that easy, the island generation is done by the EndBiomDecorator, so if you replace the generator of the default Bioms with this one it will maybe work. To prevent the EnderDragon from spawning just use some events (LivingJoinWorld)

Its now that easy, the island generation is done by the EndBiomDecorator, so if you replace the generator of the default Bioms with this one it will maybe work. To prevent the EnderDragon from spawning just use some events (LivingJoinWorld)

What exactly would I need to change, and where? I have tried to extend both my world provider, and chunk provider to the surface ones. This is my new ChunkProviderGenerate#populate override:

    public void populate(IChunkProvider provider, int x, int z){
        int k = x * 16;
        int l = z * 16;
        BiomeGenBase biomegenbase = this.worldObj.getBiomeGenForCoords(k + 16, l + 16);
        biomegenbase.decorate(this.worldObj, this.worldObj.rand, k, l);
        super.populate(provider, x, z);
    }