NARRATOR: Finally, what about the sphere? So, faces? Well, just the one. Edges? Zero. Vertices? None. Oh dear! Oh well. The spheres are disappointed and one is angry. 3D shapes have faces (sides ...

[DaveMakesStuff] demonstrates a great technique for 3D printing a sphere; a troublesome shape ... Vase (or spiral) mode prints an object using a single, unbroken line of extruded filament.