Maybe I shouldn't bother with all the post work on these images.
Maybe instead, I should just stop the render 6.25% of the way through (at the end of the second of the four rendering passes). This leaves the images with the kind of blocky pixellated art that we saw in "high-end" computer games of the late 80s and early 90's.
The general imagery I've been aiming for in The Law has been inspired by punk 'zines, Pink Floyd's "The Wall" and the comic 2000 AD circa early 80's... but if I shifted that to circa 1990, it could turn into something very different.
(I just looked at my screen at roughly this point in the rendering process, and that's what crossed my mind)