Circle Heart Optical Illusion
thingiverse
Rotate the object 180 degrees, and you'll see two hearts transform into two rings or place it in front of a mirror for an even more striking effect. The best results are achieved when viewing from a 30-degree angle downwards to the object. Inspired by Kokichi Sugihara's circle/square illusion, this mind-bending trick has been analyzed by Professor Dave Richeson and shared with us by landisbs. To see it in action, check out this video: https://youtu.be/Wv8Hu0mdb4Y
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