Well, I settled on the mix - I wound up rendering in Firefly to avoid the over-exposure of the arm and just kind of layering a P4 render engine version over it to get some of the other details the way I wanted them to look.

http://www.renderosity.com/mod/gallery/index.php?image_id=1547067&member

That's what it finally looks like - I just wish I didn't have to render the thing twice in two different render engines to get what I want. Seems kind of redundant, and overall I'm just NOT very impressed with the Firefly render engine at all.

~ Seliah