A new video from shows off a nice combo that has a real visual impact: ambiguous shapes that look different depending on what angle they are viewed at, combined with an unusual filament that enhances the effect greatly. As you can see in the image above that shows off just such an object in front of a mirror, the results are pretty striking. Japanese mathematician and artist figured out the math behind such objects, of which his ambiguous cylinder illusion is probably the most well-known. That inspired to create his own strange objects, which he showcases happily. What is a natural complement to an object that looks different based on the direction from which it is viewed? A filament whose color depends on what direction it is viewed, of course! The filament in question is MatterHackers Quantum dual-color PLA, and this unusual filament is split right down the middle in two different colors, resulting in a printed object whose exact color depends entirely on the viewing angle, and the object geometry. The resulting objects look especially striking when demonstrated with the help of a mirror, because as the object turns and changes, so does the color change as well. 3D printing has certainly opened up a new doors when it comes to brain-bending optical effects, like this hypnotic Moiré pattern, and perhaps dual-color filament can enhance those as well.

Read the full article at Hackaday