OverInfrared

I would also like to add modded ores and other features to the world not just vanilla.

I have custom biomes that I have created and added to the vanilla world, but I don't want to add them to the default overworld. I want to make my own overworld with its own biomes (i.e. biomes o plenty) so you only get mine. But, there are no resources for the creation of custom world types for 1.16.2 and 1.15.x. Specifically I looked at biomes o plenty's code and seen that they use a class called BiomeGeneratorTypeScreens, this works to an extent but to get it fully working biomes o plenty uses a ton of custom classes to overwrite the whole of vanilla generation when I only want my custom biomes on the current system.