A look at some of the optical illusions available for 3D printing (and maybe a couple of free energy perpetual motion machines).
3D Files:
Anamorphic Cube: https://www.thingiverse.com/thing:188...
Rightward Pointing Arrow: https://www.thingiverse.com/thing:288...
Head in a Block: https://www.thingiverse.com/thing:256...
Ambiguous Cylinder: https://www.myminifactory.com/object/...
Straight Pole Curved Hole: https://www.myminifactory.com/object/...
Impossible Staircase: https://grabcad.com/library/impossibl...
Impossible Cuboids: https://www.thingiverse.com/thing:237...
Penrose Triangle Illusion: https://www.thingiverse.com/thing:6513
Penrose Triangle 2: https://grabcad.com/library/penrose-t...
Money Maker: https://www.thingiverse.com/thing:286...
Pinwheel: https://www.thingiverse.com/thing:705095
Perpetual Motion 1: https://www.thingiverse.com/thing:283...
Perpetual Motion 2: https://www.thingiverse.com/thing:63543
All parts printed in AIO Robotics PLA (affiliate link): https://amzn.to/2uiYy13
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