If you have ever tried to export a Poser figure to 3ds, you may have noticed a warping of the UV texture mapping at the boundaries between the front and back portions of the map. This is due to the fact that polygons in OBJ files treat UV coords and vertices independently. 3ds files treat them as one of the same. e.g. A face in an OBJ file f v/vt v/vt v/vt where v => x, y, z vt => u, v notice that v may be different than vt. in a 3ds file we have f = v v v where v => x, y, z, u, v The bottom line is that for a 3ds file there is only one UV point for one vertex. When Poser exports an OBJ that has faces where v is not equal to vt, then it drops one of the UV coordinates, distorting the texture mapping