Hi - 1) No... renderings really a processor thing; if the MTs not in use, it shouldnt affect the work Poser does at animation time. 2) No... Ive found that this makes no difference. The calculations are made during render time on the visible surface/s. 3) You betcha!!... This is a MAJOR cause of slowwwwww animation times. But, since you cant really do much about this on, say, particular nice hairstyles, youve gotta either sit back and wait or invest in a killer `puter ;-)