Chip, the original object was created in the free form modeler, then exported as an OBJ; run thru UVM; reimported into RDS. At that point it's a mesh form object. And it imports with one face missing. I'm with you - I don't know the mesh form modeler very well, either, so playing around with the obj in that modeler produced some rather bizarre results. Generalisimo, when you say "a reversed normal" are you referring to the whole obj or just a portion? I know there's a setting in UVMapper to reverse the normals, but I assume that affects the entire object.