I imported into Poser 9 an OBJ file of a woman on a bed. I want to drape a primitive over her. I have been able to drape a primitive over a table that was part of a runtime and it draped perfectly. When I choose the object that the clothified surface should drape over, in the collission frame, I cannot specify the OBJ object. What am I doing wrong or cannot one use an OBJ as the object for the surface to drape over?

Thanks