– Sylvia Wenmackers :  “Millusion”. University of Leuven, Belgium

As far as I know, this is a new illusion involving windmills, so I’ve called it “Millusion”. I experienced it myself while driving in the evening. One turbine seemed to be turning “the wrong way” as compared to the others. By the time I got home, I had figured it out: I had only seen the outlines of the windmills, silhouetted against illuminated clouds behind it. Probably I was looking at the front of most turbines and at the backside of the “wrong” one (or vice versa). Later, I asked scientific illustrator Pieter Torrez to help me animate it, to check this conjecture with a 3D model. It worked!

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