Someone in the chip design lab at ETH Zurich (IIS) wrote a script to get metal deposited during the chip fabrication process, without causing short-circuits. The script would take images and convert them into the metal deposition pattern. There's a whole catalogue of them. I think I made the world's smallest drawing of a negiri sushi on my own chip tsukiji:
http://asic.ethz.ch/2018/Tsukiji.html