ptex is bound to the vertex ID of the object... so every object needs its own ptex file... if you change the vertex order the ptex file is gone... i would say that is not working for games...
Disclaimer: I'm just a curious beginner, don't crucify me if my question seems dumb. Don't PTex's adjacency tables eliminate seams entirely? I don't quite understand the part about padding, I was under the impression that PTex had NO PADDING and only stored the necessary texels because it doesn't need to blend pixels based…