500Mgz is the min for P5, though I've been running on a Celeron 400 for a couple weeks now. It's really not so much the processor as fussy time. Basic stuff comes "Pre-Fab." If you're content with them things are sometimes easyer. A few hundred is good for P5, or it will be by the next sale I bet. The Firefly renderer is what comes with P5. In and of itself it is not a shabby peice of technology. ALOT depends on the time you've invested "Illuminating" a scene with native light tools, as well as other elements in any 3D scene wich effect final renders i.e. texture, bump, and/or transparency maps, and base color. Allhough not many render engines come with "Styleizing plugins..."