There must be a way to determine which UV to use since Poser is able to, but I guess it is too difficult to make the plugin fully compatible with Poser?
Poser has the raw geometry in memory, so Firefly can make some assumptions. However when PoserPython provides that information (to a plugin like the OctaneRender for Poser) it makes some assumptions that the mesh has been constructed correctly.
I don't know anything about UV coordinates and vertices. Would you mind giving me a short description of what is wrong with the figure so I can send it to the creator?
I had a further dig around with the mesh, and without spending a lot of time on it, I think there is just 1 polygon causing the issue. There is a polygon in the toe which only has 2 vertices (and probably has 3 UV's) - so that is triggering the mismatch.
It's very rare for a figure to have a problem like this. I'm not aware of any other figures available on the market which have a mesh issue like this. The only issue I can remember is Apollo Max had his feet bones facing the wrong way.
Paul