All four of these rotating images were created using software called* Stella 4d: Polyhedron Navigator*. You can buy this program, or try it for free, at this website. Faceting is the inverse function of stellation, and involves connecting the vertices of an already-established polyhedron in new ways, to create different polyhedra from the one with which one started. For each of these, the convex hull is the great rhombcuboctahedron, itself.

# Tag Archives: icosidodecahedron

# A Central Icosidodecahedron, Augmented with Twenty Cuboctahedra, and Twelve More Icosidodecahedra

Above and below, you will find two different coloring-schemes for this particular cluster of polyhedra. I made both of these rotating images using *Stella 4d*, software you can buy, or try for free, right here.

# Tidally Locked Binary Icosidodecahedra

I’ve been trying to figure out for over a year how to make images like the one above, without having holes in the two polyhedra, facing each other. At last, that puzzle of polyhedral manipulation using *Stella 4d* (software available at this website) has been solved: use augmentation followed by faceting, rather than augmentation followed by simply hiding faces.

# Two Polyhedral Compounds: the Icosidodecahedron with the Truncated Cube, and the Rhombic Triacontahedron with the Triakis Octahedron

These two compounds, above and below, are duals. Also, in each of them, one polyhedron with icosidodecahedral symmetry is combined with a second polyhedron with cuboctahedral symmetry to form a compound with pyritohedral symmetry: the symmetry of a standard volleyball.

A program called *Stella 4d* was used to make these compounds, and create these images. It may be purchased, or tried for free, at this website.

# Two Compounds with Pyritohedral Symmetry: the Icosidodecahedron / Truncated Octahedron Compound, and the Rhombic Triacontahedron / Tetrakis Cube Compound

*Stella 4d*, a program you can try here, was used to create these two compounds. Both have pyritohedral symmetry: the symmetry of a standard volleyball. The two compounds are also duals.

# Selections from the Stellation-Series of the Icosidodecahedron

The icosidodecahedron has a long and interesting stellation-series, and you can see the whole thing using *Stella 4d*, the program I used to make the rotating .gifs here. Rather than keep the scale the same in each frame, I set the program to make the polyhedron as large as possible, while still fitting in the image-box. This creates the illusion that the polyhedra below are “breathing.”

The polyhedron above is the 20th stellation of the icosidodecahedron — the one that appeared as the sole image in the last post here, but with completely different colors. The next one shown is the 31st stellation.

The 55th stellation is immediately above, while the next one is the 69th.

The 84th stellation is immediately above, while the next one is the 89th.

The 106th stellation is immediately above, while the next one is the the 110th.

The 135th stellation is immediately above, while the next one, which is chiral, is the 157th.

# Glimpses of the Invisible

Created using *Stella 4d*, available here, by multiple stellations of a black icosidodecahedron, rendered as a rotating figure, against a black background.

# 32 Octagonal Mandalas, Rotating in the Dark

To create the octagonal mandalas, I used *Geometer’s Sketchpad* and *MS-Paint*. I then projected them onto the faces of an all-but invisible icosidodecahedron, and created this rotating .gif image of it, using *Stella 4d: Polyhedron Navigator*, software you can try for free, right here.

# The Greatly Augmented Icosidodecahedron, and Its Dual

If a central polyhedron’s pentagonal and triangular faces are augmented by great dodecahedra and great icosahedra, I refer to it as a “greatly augmented” polyhedron. Here, this has been done with an icosidodecahedron. The same figure appears below, but in “rainbow color” mode.

In the next image, “color by face type,” based on symmetry, was used.

The next image shows the dual of this polyhedral cluster, with face color chosen on the basis of number of sides.

Here is another version of the dual, this one in “rainbow color” mode.

Finally, this image of the dual is colored based on face type.

These six images were made with *Stella 4d*, which may be found here.

# The Pyramid-Excavated Icosidodecahedron, and Its Interesting Dual

To make this, I used the excavation-function of *Stella 4d*, set to remove pyramids with equal edge length from each face of an icosidodecahedron. You can try this program here.

The dual of this polyhedron is shown below.