Thanks for the contribution. That looks as good as what I was doing and for only a fraction of the vid mem.

I actually did something like this a couple years ago. I can't remember why I didn't go with it. I think it was pixelated poorly, so I abandoned it. The U and V are deprecated, so I'll have to convert this over to the shifting material, although I see you already have that in your todo. I can't find it in the template folders(it used to be in effects), but I probably wouldn't know what to do with it anyway.