This is a shot of a mech w/ a ground poly only.  BG is sperical map made from refgen, skygen, and demscape. I used an array of 8 lites w/ overcaster sun and ambient in the scene w/ no spinning sun simply because I didn't want a soft shadow. Render time was 4.5 minutes / enhanced low/ motion blur 50%. 720x486. Here's an AVI   Contact: Jack Daniel JD@jackydaniel.com