Penrose Triangle Illusion

cults3d

!! New version penrose5.stl with a couple of wayward vertices fixed !!\n\nThis is a 3D-printable model of the Penrose Triangle illusion, based solely on Oscar Reutersvärd's original 1934 design, a painting by Swedish artist that also appeared on Swedish postage stamps in the early 1980s.\n\nI created this 3D design entirely from scratch using the process outlined in the "Instructions" section. This work is based solely on Oscar Reutersvärd's iconic design, with some elements inspired by the timeless Hollow-Face illusion.\n\nThis model contains a number of notable improvements over previous 3D representations:\n\n1) It is parallax-corrected for a viewing distance of 40cm, so it will look exactly like Oscar Reutersvärd's original design, with cubes lining up on all three sides simultaneously. This is a significant visual improvement over previous versions, which only lined up on two sides simultaneously.\n\n2) It has been resized (to 99.43 x 99.65mm) to make maximum use of the Makerbot build envelope.\n\n3) The top edges are now tapered for optimal printing results, with sharper edges achieved by using better printers.\n\n4) I hold the copyright to this 3D design and hereby distribute it under the "Attribution/Non-Commercial/Share-Alike" licence for all non-profit parties to print, improve and share.