Disabling biomes in A20?

[Mskitten87]

Is there a guide to disabling Biomes for A20 since it's changed and no Map tool currently out. looking to disable all my biomes but  pine forest/snow ones. and not seeing anything updated on how to do it for A20 Via XML's

 

[khzmusik]

I don't know about XML, but the video in this thread shows you how to do it by editing the biomes.png file: