I was talking about this on cohost and millie also told me about Decker not being able to display the 256 grays which... makes complete sense tbh, as you yourself explained the palette limitation (which I actually know but didn't connect the dots, so I'm a bit embarrassed). Funny enough people liked the result, so I think I'll rename the option and leave it there for them to use and give life to fever dreams.
And the order for the dithered image makes sense now, I'll rewrite its import code and see if I can get it right then. Thanks a lot!
Edit: the dithering improved a lot now!