The direct links to the stl files in github let you rotate it around and get some idea of how they actually work [1][2]. This is absolutely mind-blowing! [1]

The direct links to the stl files in github let you rotate it around and get some idea of how they actually work [1][2]. This is absolutely mind-blowing! [1] https://github.com/Matsemann/impossible-objects/blob/master/3dfiles/arrow/filledarrow_whole.stl https://github.com/Matsemann/impossible-objects/blob/master/... [2] https://github.com/Matsemann/impossible-objects/blob/master/3dfiles/circlesquare/circleinnersquare_2x2.stl https://github.com/Matsemann/impossible-objects/blob/master/...