Kokichi Sugihara’s “Ambiguous Cylinder Illusion” is a finalist for the 2016 Best Illusion of the Year Contest.
You can find Kokichi’s research on these ambiguous shapes here. There’s a German explanation article here. And a 3D printed version and explanation video here.
Read more: http://twistedsifter.com/videos/ambiguous-objects-that-change-shape-in-a-mirror/