George Hart made STL files for 3d projections of a number of 4d objects[0]. Some 3d printers include them as example prints One place I know even used Hart's 3d

George Hart made STL files for 3d projections of a number of 4d objects[0]. Some 3d printers include them as example prints One place I know even used Hart's 3d projection of 120 cell as a standard test print. It has a bunch of thin complicated features that machines have trouble with. One could tell immediately if something was wrong with the machine if the thin pieces were deformed or came out too brittle that normal handling broke them. [0]http://www.georgehart.com/rp/rp.html http://www.georgehart.com/rp/rp.html [1]http://www.georgehart.com/rp/120-cell-george-hart.stl http://www.georgehart.com/rp/120-cell-george-hart.stl