Exploring some ways to create the illusion of an impossible triangle. Impossible triangle (helix): http://shpws.me/TggA https://www.printables.com/model/292131-impossible-triangle-helix tato_713's "Penrose triangle like figure" https://www.printables.com/model/157441-penrose-triangle-like-figure Impossible triangle (tilted planes): http://shpws.me/TggB https://www.printables.com/model/292132-impossible-triangle-tilted-planes