Penrose triangle pendant (3) (dual extrusion)

Last crawled date: 4 years, 2 months ago

Pendant representing a Penrose triangle (impossible figure). Of course, since it's impossible, it looks like a Penrose triangle only from one point of view. From other points of view the trick becomes evident (curved edges).
Designed for a dual-extrusion printer. Separate STL files are provided for the blue and white color. Some areas are filled in both blue and white STL files; when slicing in Cura, this produces alternating blue and white layers effectively creating an intermediate color, so a three-color object is created on a dual-extrusion printer.
On the back side there are two variable-diameter holes for attaching the rope. Take a thin synthetic rope, put its end into fire and immediately pull on the molten end so that it becomes long and thin. Then insert the end into the hole, drag it through the hole using pliers, tie a knot, cut the extending end and pull the knot back into the hole.
Designed in OpenSCAD. Ad-hoc support structures provided.
See also versions (1) and (2).