Actually, re bluescale, I think I kind of figured that out: it can be psuedo-controlled, it's based on the number of on pixels in each column. The more in each column, the closer the column gets to black-and-white. When there are ~5 pixels off, it looks like B/W, but only in that column. Nothing fancy, but it might be good for effects and such.
Wut? Serious observation in ridiculous discussion? Okay then, how about replacing Solver with WFRNG?