Hi,

 

I may have missed something, but I can't seem to find a way to get all the biomes registered to spawn with the BiomeManager. I'm trying to make mobs spawn in all biomes in the overworld, including modded ones (for BOP compatibility). Is there a simple way to do this?

Try BiomeGenBase.biomeList (it's an array)

You can always use BiomeDictionary, It's BOP supportive as well.

EntityRegistry.addSpawn(Entity.class, 1, 1, 1, EnumCreatureType.MONSTER, BiomeDictionary.getBiomesForType(Type.TYPE));