I love illusions, even from 2011 (Penrose Triangles) Source: http://www.thingiverse.com/thing:6513

Erich_HaHaOh (Erich HaHaOh) March 7, 2015, 4:50pm 1

I love illusions, even from 2011 (Penrose Triangles)
Source: http://www.thingiverse.com/thing:6513

Erich_HaHaOh (Erich HaHaOh) March 7, 2015, 5:04pm 2

See also: http://im-possible.info/english/library/index.html
Look for figure 8 !
Another gimmick: http://www.michaelbach.de/ot/index.html

Melvin_luna (Melvin luna) March 8, 2015, 3:26am 3

Cool

Erich_HaHaOh (Erich HaHaOh) March 20, 2015, 7:38am 4

Try to catch the energy field