Unless you're Poser figure is transparent or something I'd forget about it. As long as your render settings are right it won't cause significant slowdown. The main culprits, apart from a slow machine (!) for slowing down renders are:- soft lights, multiple light sources, transparency, render size, reflection, volumetrics, volume materials, render settings(!!!!) The scene I just posted took 4 hrs, rendered on SuperFine-4 with 150 lights. If I'd included volumetrics, it would have been 40hrs. I've I'd rendered on SuperFine-256 it would have taken 3 days, and this with volumetrics about 5 days. Add 2000x2000 and it would have taken over a month. On standard AA it takes 35 minutes! So you see, it's difficult to guess without loads more info.! Why not render pass 1 to the screen and let Bryce give you an estimate. It's sometimes wrong, but not always, and it might give you an idea. Of course, a 2000x2000 piece is 8.3 times bigger than an 800x600 pic and will take roughly the same multiple more time. Do you really need it this big?