I've never had an ATI card, but I think it wouldn't have any trouble Just to be clear -- there's a difference between fancy front-scattering that'll put a lot of pressure on most systems, and some straight-forward back-scattering that'll look great for obvious things like foliage and light coming through the back of peoples' ears.

The back-scattering side can be done effectively with very little extra effort, while good-looking front-scattering requires a lot more shadow samples to be taken (although scattering on both sides would benefit from the extra samples).

Jibb