Attached Link: http://www.kuroyumes-developmentzone.com/cr2_ufilespec.html

Some more info at the link - hope it helps. "I haven't tried V3 yet." You might want to think in terms of seconds per frame, rather than fps... ;) But seriously, mesh density is only one drawback. The Poser meshes are copyright, and you probably wouldn't be able to distribute a game made with them.