Thingiverse has already seen several variations of the “GEB cube” a cube designed to cast a shadow of the letters G, E, or B depending upon the direction of light passing through it. SashimiTabernacleChoir’s QR code version is decidedly more ambitious. As SashimiTabernacleChoir points out, you would probably need highly focused light1 or possibly a light source from very far away. Either way, this is one object I would love to see printed!
It might be possible to make a version of idea where it had just a flat QR code panel for the bottom and two adjacent sides. This would allow almost any light source to serve.2 Another cool variation would be to design the three sides so they could be snapped together – and print all three flat on the print bed at the same time.
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