abSIRD is a Quake II modification that renders visually as a "magic eye" image ... amazing!
I still haven't downloaded it, but I certainly plan on trying it out. seeing the magic eye images has always been relatively easy for me so I don't think I'd have a problem playing the game. it would be freakin amazing if this could be expanded on so that you can actually have real textures instead of the fuzz that's currently used.