This is the fourth in a series of posts, each of which builds upon the others. The images in the prior three posts were created using Geometer’s Sketchpad and MS-Paint. For this one, I used Stella 4d to project the most recent of these images of each pentagonal face of an icosidodecahedron, and then rendered the triangular faces invisible. (Stella 4d is available for sale, with a free trial download available, at http://www.software3d.com/Stella.php.)
RobertLovesPi.net 
This one’s creepy. If I didn’t know that the pentagons joined at their vertices I would never see it.
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Fortunately, “creepy” is just what I was after! If you search for “icosidodecahedron” here, though, you’ll find many that are much less subtle. In fact, I usually have the vertices and edges shown as spheres and cylinders.
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