Three Different Compounds of the Octahedron and the First Stellation of the Rhombic Dodecahedron

These compounds differ in the relative sizes of their components. I made all three using Stella 4d, which you can try for free right here.

Three Two-Part Compounds Similar to Kepler’s “Stella Octangula”

I made these using Stella 4d: Polyhedron Navigator. You can give this software a try, right here, for free.

Two Six-Part Polyhedral Compounds

I stumbled across this compound the other day, while playing around with Stella 4d: Polyhedron Navigator (available here).

At first, I thought this was a compound of six tetrahedra, but careful examination reveals that the tetrahedra are missing parts along the middle of some of their edges. I looked up the canonical compound of six tetrahedra in Stella‘s library, and here it is. As you can see, it’s quite similar — but it does have those “missing” pieces added.