@Kartman Hello, I cannot find a good scanline reproduction with ADVMame. It does not use shaders, only overlays. Tried to make a few scanline overlays and had no luck. There are video options for scanlines, but I could not find anything that looked as good as shaders do.
Please do not post a support request without first reading and following the advice in https://retropie.org.uk/forum/topic/3/read-this-first