If this isn’t already possible, I would advise adding support for it.

This isn’t possible and won’t be possible until 1.14+ as the biome max is hardcoded at 256

JEID alters the map gen system itself to try and make it closer to newer builds of MC.

No changes will be made in RTG to accomodate mods that alter the limitations of registries or that completely break the region/save format.

Issues are not the place for discussion, so locking.