Godel Escher Bach QR Code shadow cube

The shadow of this cube in different directions gives QR codes pointing to the Wikipedia articles for Kurt Godel, M.C. Escher, and J.S. Bach respectively. Also a pretty challenging print test. Note that QR codes cannot be read in mirror image, so only 3 of the 6 possible cube orientations cast a readable shadow.

via Godel Escher Bach QR Code shadow cube by SashimiTabernacleChoir – Thingiverse.