I think I'll make more of them to find out more about three-dimensional patterns and the effect of using white and black and only one more color in them.
I got the idea when I saw such reliefs, made of manure, which a friend of mine had brought home from a trip to Africa. Since I've never been to Africa I can't do African patterns, but I can try to use "my" patchwork patterns and transform them into such reliefs. I'll try that out! :-)