[BearOso]

I came up with something similar to your idea, a GPU compute PPU for future Snes9x. What they're doing is using legacy fixed-function API to draw quads, then blend a bump map on with the final image. It's weird. We have the tools to do some really cool things with GPUs, but they chose this. I'm more impressed by all the post-processing shaders people have come up with for all the other emulators.