The Schonhardt Polyhedron is the simplest example of a non-tetrahedralizable polyhedron. You can make it in OpenSCAD with just two simple lines of code. For more information about this and other meshy/mathy things, check out the Mesh Wisdom Collector on Hacktastic: http://mathgrrl.com/hacktastic... ===== Twitter: twitter.com/mathgrrl Hacktastic blog: www.mathgrrl.com/hacktastic Shapeways geekhaus store: www.shapeways.com/shops/mathgr... This design and all associated pictures and files are licensed under the Creative Commons Attribution Non-Commercial Share Alike license. If you want to use designs, images, or files outside of the terms of this license, please email [email protected] .