it's a good question! I guess I can spend up to half the prep time playing about with lighting and getting the shadows "right" (as right as I ever get them! - perhaps the resaon is that lighting in general can be so damn hard, no matter waht software you render in! It looks really strange when you see a figure brightly lit but casting no shadows - looks like they're floating for one thing. The only time you could genuinely get away with this is for a pin-up I reckon