Creating a New Polyhedron from the Snub Dodecahedron

Shown below are the snub dodecahedron and its dual, the pentagonal hexecontahedron.

Seeking a way to make a “new” polyhedron (one never seen before), I augmented each face of the orange dual, above, with prisms. These prisms have a height equal to twice the average edge length of their bases.

Augmented Penta Hexeconta

Next, I used the software I use to manipulate polyhedra (Stella 4d, available here) to create the convex hull of this augmented pentagonal hexecontahedron.

starball before ttmfr expanded pentagonal hexacontahedron

Finally, I used Stella’s “try to make faces regular” function, and obtained this result, which I liked enough to stop here. There’s no way for me to know with certainty that this polyhedron has never been seen before, of course, but that didn’t stop me from having fun making it.

Unnamed starball.gif

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The Cubic Rhombicosidodecahedroid


I call the polyhedron above the cubic rhombicosidodecahedroid because it combines a cube’s six squares (shown in green) with the overall appearance of a rhombicosidodecahedron. For comparison, the latter two polyhedra are shown below.

I made these rotating images using Stella 4d: Polyhedron Navigator. This program may be tried for free at

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A Tessellation Featuring Rings of Pentagons


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A Four-Color Flag

a four-color flag

There. Now, if I ever start an independent country, I’ll at least have a new flag ready.

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A Zonohedron with 7802 Faces

7802 faces.gif

Zonohedra with surprisingly large numbers of faces are easy to make with Stella 4d: Polyhedron Navigator. This program is sold at, where there is also a free trial download offered.

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An Expanded Version of the Snub Cube

prism-expanded snub cube convex hull after TTMFR

To make this polyhedron, I started with a snub cube. Next, I augmented all triangular faces of it with prisms, then took the convex hull of the result. Finally, I used Stella 4d‘s “try to make faces regular” function on the convex hull.

Stella 4d: Polyhedron Navigator has a free trial download available here.

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A Twisted Expansion of the Truncated Octahedron

twisted truncated octahedron reflection one

I made this variant of the truncated octahedron using Stella 4d: Polyhedron Navigator. You may try this program for free at

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