An array of Rhombic Dodecahedra with zones of different lengths. Rhombic Dodecahedra are zonohedra, each set of parallel edges can be varied independently, or modulated. In this array of cells, various lengths are used, and symmetry of the whole is maintained. Two cells of different composition are shown apart from the array, “pulled out” from their locations.

An extended array of RD cells, modulated zonally.

A concave modulation of an array of RD cells, with overall Octahedral symmetry.

A zonal progression in a BCC lattice, where lengths in successive zones are increased by a factor of √2. This is done in tetrahedral symmetry.