Meshes getting triangularized in transit by packages (i,e, all the polygons are divided into triangles, adding much to bulk and spoiling the appearance) is a persistent nuisance. Thus I have put in the Poser Fun Stuff a Windows application DETRIANG which tries to un-triangularize an .OBJ mesh. It joins any two triangular faces to make a 4-sided face if: They are consecutive in listing order. They share 2 corners but not all 3. Their texture map addresses at the shared corners (if any) match. They are not more than 5deg away from co-planar. They are in the same (material) area and group. It also has an option to safe more storage space by removing the "vn" (= surface-normal) information.