I've had many many problems with P5 trying to render an animation... lockups, the computer reboots and the worst one... finally get one done only to find out that Poser corrupted the avi when it was writing it... I have actually uninstalled it for the time being. If I was going to try again I would definitely render a sequence of stills and put it together in a vid editing app. I've gone back to P4 with ProPack. I render most of the time in Cinema so this works better for me anyway... and definitely causes me less grief. Ed