Three Dollar Quill

I thought I was going to be able to throw together dithering pipelines easily, and I guess I can, they just don't really work.

The Bayer dithering is artifacting heavily, in ways I didn't expect, and the Riemersma dithering (which I could be doing just completely wrong) is hitting exponential blowup.

I would like to be able to figure out what I did wrong there, but I don't have the time to ponder it tonight.

Good night.