DoMiNaNt_HuNtEr that wasn't the way to do it. I couldn't find the registry option and then found this software and followed the instructions, it stretches the image but it works fine. Did you read the instructions?
Just copy the .dlls from the MS and 3Dfx folders to your Emperor folder and that's it man. I didn't change the "Config folder/ Running instance" option from dgVoodoo, I got by default: C:\Users\Levi\AppData\Roaming\dgVodoo I didn't tweak any option and didn't do anything else, running on Windows 10