Sometimes the best way to figure out how something works is to make a model of it. 3D-modeling software makes it possible to do the job in silico, and sometimes that’s enough. But to really get inside ...

The underlying structure of this tan cut and folded paper model might be seen as two triangular pyramids with a common base, facing opposite directions. Around the apexes of both of these pyramids are ...

Adding textures is a great way to experiment with giving 3D prints a different look, and [PandaN] shows off a method of adding a wood grain effect in a way that’s easy to play around with. It involves ...