All this is how Substance Designer has been very widely used to create textures more efficiently that look as real as possible or look as unreal as possible.

Discover the exciting new features in Adobe's Substance 3D Designer v15, including a powerful 3D render engine, improved format support, and enhanced usability for artists.

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.