Then you get a whole lot of overdraw and intense fill rate usage. OR we could do a refract shader on the whole thing and make it actually look like ice. Then it would be insanely slow for everyone! Well, everyone who has pixel shader support. Unless they have like a GeForce 7800 GTX Pro eXXtrEEME on a giant dual-core machine or some such. And probably then, too.

We'll take the overdraw then :)