Here's a super clever art installation by artist Markus Raetz. As the two paper chandeliers spin, the light source from behind mimics a ghost head turning its head from side to side. The paper is specifically cut to create the illusion of motion from the invisible head.
"Digital painted Creatures and stuff based on my own childhood drawings. I designed these creatures at the age of 4 and now reincarnated them with digital painting" - kiddie arts serie. Walvis. Vlieg. Auto. Slak. Arend. Euromast. Vlinder. Kever.