prints and monoprints
Leonardo da Vinci said
A way of enhancing and arousing the mind to various inventions:
I shall not refrain from including among these precepts a new device for the imagination, which, although it may seem rather trivial and almost ludicrous, is nevertheless extremely useful in arousing the mind to various inventions. And this is, if you look at any walls spotted with stains, or with stones of various patterns, if you have to invent some setting, you may be able to see therein a resemblance to various landscapes, graced with mountains, rivers, rocks, trees, plains, great valleys and hills in varied arrangement; or, again, you may see various battles and figures in action; or strange faces and costumes, and an endless variety of things which you can distill into well drawn forms. And what happens with regard to such walls and variegated stones is just as with the sound of bells, in whose jangle you may find any name or word you choose to imagine.