> Take a look into the ./hlsl/ folder, there is a sub-folder ./hlsl/artwork_support/. > Copy the containing post.fx and distortion.fx from there into the ./hlsl/ folder and > replace the existing files.
I don't have this sub-folder in my HLSL. I re-downloaded both .167 64-bit and 32-bit from mamedev.org and that sub-folder is not included.