How to Lego-fy your plots and 3D models

At first glance there seems to be pieces that could be simplified. E.g., in this image http://community.wolfram.com//c/portal/getImageAttachment?fi..., there are 2 1x1 bricks in multiple places (on the top level at the "nearest" corner, for instance) that could be replaced with a 2x1 brick. I wonder what part of the program results in this.

"Lego-fy"?

The author is basically talking about "voxels" [1] for which a ton of research and tooling has been made already, not to mention the ever so popular Minecraft game and its numerous clones.

Since this is HN, here's the obligatory JS library: http://voxeljs.com/

[1]: https://en.wikipedia.org/wiki/Voxel