That's an interesting thought, and well worth looking at, but my first thought is that I believe that Poser splits the mesh polygons and vertices into seperate body part meshes (with possible vertex duplication) according to the body part specific groups. Part of the reason for this specific partitioning (if it exists) may well be precisely to avoid any conflicts in poly membership to multiple body part groups. In this case, I would expect that either: Poser just takes the first group label and ignores any other labels, at least for this part of the processing, therefore it's "first come first serve" scenario and the poly only becomes part of one body part. or Poser duplicates the face in each of the new body part objects that it encounters an association with. Still, it would be interesting to see what results you come up with. Bill