This image demonstrates the kinds of facets Poser can handle. Poser deals with tris and quads fine, but doesn't like polys. It also flakes on degenerate polys of any sort, which occur when a facet, as defined in the obj as being drawn from a given set of vertices, contains two identical vertices. I've left the vertices in the example one slightly seperate, but that's just for demonstration purposes. In reality the two shown would have the exact same co-ordinates and thus form a triangle of four points. Makes poser flip out and render the whole thing black.