ah that's a very cool idea actually. bayer and the b&w masks could be run in a shader, too. except floyd steinberg variants. another useful inspiration could be "8bit photo lab", but I'm sure you're aware of that one ;)
Totally agree, having dither options would be really useful. Dither styles can change the whole feel of an image or game. I’ve been experimenting with this myself and built a small free web tool to test different dither effects quickly — sharing in case it’s useful: Dither Image Online
