That’s what my program’s called anyway. It’s strange I don’t remember seeing this done anywhere, considering it’s a pretty obvious thing to do to photos.
I didn’t realize for a little while that what I had was squared rectangles! (which I’ve been studying off and on for a few years, thanks initially to Stuart Anderson’s squaring site) I’d never seen coloured rectangle-squarings, I guess. Well, not done for art’s sake, not of photos etc.

The program has a sensitivity setting, so all pixels closer in colour than a certain amount are put in the same square. These are 3 done with settings of 80, 50, 30: (I would put the program here but it’s written in cython – somewhere between python and C – and embarrassingly amateurish – I’m very new to cython.)

80

50

30