This is a lightbox I designed for https://www.thingiverse.com/thing:6249163 (see photo).
There are holes for sinter magnets (5x1mm) - you will need 8 of them. Just be careful to align them all correctly. I used 4 round led lights inside the box and put 4 markers there for easy placement.
I printed it in PLA with 15% infill and no support.
This is just the box - move to the thing linked above for the panel.
LithophaneBox.stl | 185.6KB | |
LithophaneFrame.stl | 97.2KB |