Go play Barrier on MAME and you will see much better defined vectors, possibly aliased as well - to avoid the stepping seen in Retroarch. And they have a really nice vector glow about them, much nicer than the Halation and Diffusion effects in Retroarch. I believe IF someone could port MAME’s vector HLSL then we would see a similar quality in Retroarch.
hunterk, thanks for the link. Unfortunately, I don’t have the tools to do my own compiling.
satoso, In Photoshop, to create the scratches, smudges, or glare effects, just create a new raster layer with your own Opacity values (60%, 50%, 45% all look good - don’t go too high or you won’t be able to see the emulated image through your overlay) and use the “Screen” effect on that layer to only show scratches, not the background.