Shaders and filters

CRT shaders

These replicate Aperture Grille CRTs. These have sharp images and strong scanlines. Shadow-mask CRTs are far more common. However, to replicate that that one would need a very high resolution display (4K or around there).

NTSC filteers

These replicate the cables used to connect the system to the tv. They are created by blargg.

Downloads

https://github.com/libretro/common-shaders

Further reading

All things shaders and filters