Fri, 24 May 2013 10:14:08 GMT Ponoko - Items by trompe tagged with impossible http://assets.ponoko.com/showroom/trompe/6356 The "impossible" tribar, also known as the Penrose triangle. This fantastic optical illusion has now been made possible through 3D printing. We have further enhanced the illusion by breaking it into cubes and added the dots of a die. Watch the video: http://youtu.be/1HAqORTBSV0 A truly three-dimensional object, only made possible with a very special design trick. Please be aware that unlike other attempts to create a Penrose triangle, this model does not have any hidden openings nor hidden twists. The model is 7.5" (19 cm) high and will come with a matching stand.<br></br><img alt="I3_showroom_image" src="http://static2.ponoko.com/design_images/images/32108/ca1d0a0f-948f-636d-c10b-d799cd5728ff/i3_showroom_image.jpg?1314893367" /> Mon, 05 Sep 2011 14:56:54 GMT http://assets.ponoko.com/showroom/trompe/6356?time=Mon+Sep+05+14%3A32%3A05+UTC+2011 trompe