Shaders that simulate the look of various non-handheld systems?

[GemaH]

I know there are a few shaders that simulate the screen/colors of handheld consoles. But are there any shaders that simulate the color palettes of the ZX Spectrum/C64/CGA/EGA/Genesis dithered look, etc?

[hunterk]

There’s the “gendither” shader that does genesis jailbar dithering, and I believe you can modify the artifact colors shader to convert everything to 1-bit black-and-white vertical lines, but that’s about it.