BiomeTweaker allows nearly every aspect of a biome to be changed. Inspired by MineTweaker, this is done by writing scripts that BiomeTweaker will interpret. Information on how to write these scripts and interact with BiomeTweaker can be found on the wiki. The long term goal of this mod is to allow pack creators to bring a whole new level of customization to their mod packs.
I do not guarantee the mod will work with modded biomes (although it should!), and I certainly do not guarantee it will be bug free.
Supported builds will be posted here. You can find experimental builds on my Jenkins server.