I can't say I have any suggestions for this. Granted, though I work in poser, i put all my images in mixed medium. I think all but one are in mixed medium, because i just use poser for a baseline, then hand paint everything else with a wacom tablet & pen. Heh, didn't want to offend any poser purists i guess :: I've been in the top twenty twice in mixed medium, and i was thrilled (shocked even). So I cant say there's bias in the top twenties of other catagories, as I am not exactly well known nor do I know a lot of peeps on renderosity myself. However, I do regularly check all the top twenties in many catagories "except" poser. This is just my own preference, many of the poser works are very good, but after the umpteenth viewing of Koz Longhair in a "new" render, its sort of tedious.. so I avoid that particular listing.