I'm 3d printing backstage passes using lithophanes. This is a laminate holder I designed for them, a kind of a light box. I built it around the Adafruit Feather 32u4 Bluefruit LE and a 4x8 NeoPixel FeatherWing with a 3.7V 1200mAh Li-Po I built the box in Fusion with cutouts for lithophanes. I made lithos in photoshop using the cutout dimensions. I imported all the files into Cura and constructed the box. I'm pretty happy with it. It debuts this weekend in Davis, CA.