Short answer: PP. I own P4, PP, P5 and P6. (Heck, I might still have the P2 and P3 disks around somewhere.) For a lot of what I want to do, PP is the way to go. I mostly use Poser to simulate line art - heavy postworking in PS so neat stuff like HDRI isn't useful for me. The toon render doesn't do what I need, either. I'm going to start playing with P6 and for certain types of renders I may go that route, but at least for now, PP is still better because it's quicker to render. P4 is a dog and I wish CL had used PP as their "new" Poser Artist program. .bum files are horrible! P5 has a lot of stuff I don't use and is slower to use than PP. The P6 lighting interests me (point lights - happy dance!) but until I play with render options and look at speed issues, it won't be my primary render engine. Cheers!