Actually doble checking the best hook is onChunkGenerating. Then you can inject your biome into the generator pipeline, replacing the default biome generator.
Also rereading the post, changing the biome on its own is not enough, as it will only change things like mob spawning. You will also need to trigger chunk regeneration as well. This could be an expensive plugin with the current API.
Also rereading the post, changing the biome on its own is not enough, as it will only change things like mob spawning. You will also need to trigger chunk regeneration as well. This could be an expensive plugin with the current API.