@Danpiker I like these very much! Have you explained how you made them anywhere?
@robinhouston Thanks! I'll try and do a little write-up soon.
@Danpiker @robinhouston Ooh, I'd definitely like to see that. I've only worked out how to do a baby version of this kind of thing that's 'flat' (so to speak), where the centres of all the squares are fixed on a square grid.