RDS eliminates materials (usemtl ___) You can change it to g before you open the model and convert it back after, either in a TE or with UVM. But straight out of RDS and into Poser, you get one texture = preview. You want a nightmare? use the bottom option on open. RDS converts the usemtl to g for you, a different one for each instance, so a two or more materials alternate, each instance is a different group. It does keep the mapping, but if you mess arround with naming groups very much, it might reverse normals on some of them - very difficult to repair.