I recently generated a world for an smp with vanilla biomes, and after discovering the Abnormals biome mods I wanted to add them, but to my dismay upon adding them the core disrupts the vanilla biome placement so there are chunk borders on specific conflict zones like forests becoming extreme hills, but no conflict in places like oceans or if a vanilla desert would have became a lush one.

The only reason I am making an issue about this behavior is because I wanted to inquire about how difficult it would be for there to be an overwrite to make the Abnormals biomes only insert in the vanilla method of biomes and temperature rather than using your spawning methods. I apologize if this is an outlandish request but I honestly think if the fix or feature was not terribly complicated it would be a good feature for the Abnormals suite.

Cheers, and thank you for your time.

The issue pops up all over the place in Minecraft from a variety of sources.

I'm not sure what you mean by generating biomes with vanilla methods and temperatures?
Anyways, this issue will usually occur whenever biomes are added or removed. There isn't really a way to 100% fix it.

Alright, I forgot that adding any biomes still does that. Do you have any idea how to make it so that the new biomes from environmental would not spawn in the world? I wonder if that would work