Voronoi Remix to 3D

Honestly, I'm not sure if this constitutes a remix or a new design. I'm calling it a remix because there's no way I could have done this without the original code to follow. I tried to make minimal modifications to its structure so you could see the progression from 2D to 3D. I think it's really cool that OpenSCAD operators like minkowski() and intersection_for() work for 2D and 3D, so that was possible.

This is a 3D extension of the approach of generating 2-dimensional Voronoi diagrams. The