This is my problem:
I extracted the steve skin from my own 1.10.2 minecraft files, but it seems like it doesnt work. Do ModelBipeds have custom UV's, and if they do, can I somehow customise them? Thanks in advance.
I had the same problem and it took me forever to figure it out. You have to delete the bottom part of the skin texture. Don't crop it, just delete the bottom so it looks like this: