Poser 6 renders better in Firefly than Poser 5 if you use Manual settings and get them right. It seems (and no I don't want to start a flame war!) that SR2 causes more problems than it solves whilst SR! for Poser 6 is )relatively) stable. However, whichever version of Poser you have,memory management sucks, even on a machine with 1.5 gig of RAM and 2 gig of virtual memory.