Shaders are visual filters that let you add all kinds of crazy stuff over your in-game graphics. Widescreen Mode Hack – This will result in some visual glitches on the outer borders of your screen but should look good in most games.PGXP Vertex Cache and Perspective Correct Texturing – Turn these on.Memory + CPU does look good in some games but can break others. Set it to “memory only” for the least visual glitches.
PGXP Operation Mode – Turn this on to take advantage of some of the benefits of RetroArch PS1 emulation.Wireframe/full VRAM – Leave these alone.