Doodles...I only have P5 and I found out the hard way to do all my rendering in the P4 renderer. I think in most cases it gives better results. Could be because alot more things are still done by merchants for P4. The only hair I don't have any problems with is 3Dream, no matter which renderer I use...but still prefer to render in P4 mode with "Ignore Shader Trees" and "No Shadows" checked.