The dynamic hair requires firefly to look decent. Maybe the image is a bit small, but the P4 render engine looks awful with the hair. Firefly seems to be a bit better with lots of lights in the scene - it actually beat P4 with the 31 light test timewise. I'll see what happens with P4 and dynamic hair and 31 lights as compared to firefly with dynamic hair and 31 lights. (As I'm cooking dinner. It's going to take a while to render!) I can't figure out dynamic cloth off-hand. My first try resulted in Don's shorts falling off. Literally. I'll do a default Vicki and Mike later to see if there's any major difference in time to render. So far, except for dynamic hair, I don't see a positive difference with firefly. Then again, I'm sticking with simple stuff for the tests. I'll get tricky as I get time to play. Right now, I'm just sobbing in joy with the nested subfolders!