Something's wrong with your facets - I think your normals are hinky. Run it through UVmapper, which has a number of tools to fix degenerate factes, flipped normals, etc. Also, poser doesn't like triangular facets, if you have any in there. But uh .... I'm not a modeler :) So you might want to get more opinions than mine BTW very cool beastie - would be fun to texture :)