heya; is there an rsr for the bag that might be messing you up? guess not if it is a prop... :/ also, just a technie note: don't make the button a separate group, unless you need to pose it as well. make it g bag/usemtl button. the only thing i can think of at this point is, edit the obj, maybe change everything to all caps (or mixed case), save a new obj, make a new phi and try it again :/ you might also check for any weirdness like extra spaces after the group names ("g bag "?). that shouldnt bother it, but who knows??