I apologize for bumping this but I am new to the whole HLSL thing, and I've copied and pasted the settings John IV posted. The results are good but I don't like the fish bowl effect. Can someone please tell me how to reduce the fish bowl effect and make it more flat? I tried changing pincushion and curvature to 0.0 and it's still there. Here's what the HLSL part of my MESS/MAME ini file looks like: