Custom PPSSPP shaders

[LunaMoo]

You'll have to look around the code yourself.
You can check this this just to get the idea that you could do much more in PPSSPP than you might be expecting, the thing is some people get's excited very easily seeing a big difference even if the end result looks like poo and doesn't fit the game at all and when everyone calms down they see the poo as poo and stop caring.

PPSSPP is open source through and over time from something very basic like hardcoded FXAA it grew to easily THE most advanced post process shader system out of any emulator out there despite most people not caring since with post process effects less means more for most people out there. PPSSPP even includes custom CWCheat types which can activate shader effects based on values from game's memory, apply different effects when FMV's are running, menu-tweakable shader variables and other features that does not exist in any other emulator post process effects support all while keeping those shaders translated automatically between supported backends.
So yeah try your best implementing what you need without breaking what exists - pull requests are welcome.