We just got back from a vacation to Texas. One of the fun things we did there was visiting Inner Space Cavern in Georgetown, where I took these pictures.

# A Dodecahedron, Encased By Stars

I made this using *Stella 4d*, which you can try for free right here.

# Two Polyhedra Derived From an Enneagonal Prism

# A Three-Part Polyhedral Compound Derived From an Enneagonal Prism

I made this using *Stella 4d*, which you can try for free at this website.

# Two Star-Prisms

Both of these prisms have 28-pointed stars as bases. I made them using *Stella 4d: Polyhedron Navigator*, which you can try for free right here.

# A Ring of Fourteen Heptagonal Prisms

I made this using *Stella 4d*, which is available here.

## A Tessellation Featuring Regular Heptagons, Regular Hexagons, and Many Irregular Polygons

### Image

If you’d like to see a larger version, simply click on the image.

# The Twenty Triangles of an Icosidodecahedron

I made this with *Stella 4d*, which you can try for free here.

# An Icosidodecahedron Variant

I made this using *Stela 4d*, which you can try for free here.

# Three Views of a Modified Great Rhombicosidodecahedron

To make these using *Stella 4d* (available here), I started with the great rhombicosidodecahedron, then used the “morph duals by expansion” function on it — twice. Here’s the result, shown with coloring done by face type.

The next one has faces colored by number of sides.

Finally, here’s one shown in rainbow color mode.