Part of a <a href="https://en.wikipedia.org/wiki/bitruncated_cubic_honeycomb" class="extiw" title="en:bitruncated cubic honeycomb">bitruncated cubic honeycomb</a> - a space filling tesselation of <a href="https://en.wikipedia.org/wiki/truncated_octahedron" class="extiw" title="en:truncated octahedron">truncated octahedra</a>.
Tom Ruen
<span class="int-own-work" lang="en">Own work</span>