This model is one of only four polyhedra where every face is a rectangle, and
each fits into the solid the same way, that is, it's isohedral.
Can you spot the rectangular faces? Each one has three triangular parts
Can you imagine the other three such polyhedra?
The polyhedron is easily created in Great Stella/Stella4D as a faceted
rhombic dodecahedron. Opposite faces of the
rhombic dodecahedron are aligned, so we can replace each pair of opposite
faces with four rectangles connecting edges between the two.