Penrose Triangle Illusion

thingiverse

Introducing the revised version of penrose5.stl with rectified rogue vertices! This is a printable 3D model inspired by Oscar Reutersvärd's 1934 Penrose Triangle illusion, which also graced Swedish stamps in the early '80s. The design was entirely crafted from scratch, adhering strictly to Reutersvärd's work, but with some elements inspired by the Hollow-Face illusion. The penrose5.stl boasts several improvements over previous 3D renditions: it's parallax-corrected at a 40cm viewing distance for an accurate representation of Reutersvärd's design; resized to maximize the Makerbot build envelope (99.43 x 99.65mm); features tapered top edges that showcase your printer's capabilities; and comes under a Creative Commons Attribution-NonCommercial-ShareAlike license for non-profit parties to print, enhance, and share. To print, simply follow these instructions: no support is needed. Note that penrose4.stl with better poly orientation and penrose4_braced.stl with bracing for stable positioning during printing are also available. Creating your own Penrose Triangle illusion is a breeze following these steps in your preferred 3D software, accompanied by provided photos. Steps include creating an image plane, setting up a camera, crafting a cube, duplicating it eight times, adjusting for parallax error, and assembling the final surface. It's a great exercise for first-year 3D art/design students!