heyas; did you check for degenerate facets? looks like that might be it, from here. or maybe.... check your mesh for overlapping vertices. is the mesh double-sided? that might cause this kind of thing, as well. try making the mesh one-sided. if it has a thickness (rather than back-to-back polygons), try making it thicker. poser is trying to weld too many points together, and gets messed up.