It's still busy and I don't want to shut it down. 91%! =D

However, it's on a spectral atmosphere with AO selected.

I've always, always had a problem with the Poser shader tree. It's horribly slow, I think because it is loading Poser to do part of the rendering.

I really think it's the crazy skin shader. It took almost 12 hours to do 10%, and now it is speeding up again.