So here is a box that can hold five of 110mm x 110mm x 3mm lithophanes. I've also added the SolidWorks files just in case you want to edit the models. Also the LED holder is designed to fit a 1W heat-sink
For a breakdown of how to make the lithophanes along with lighting them up with an RGB LED see muh blog here:
https://www.antalife.com/2015/11/project-3d-printed-lithophanes.html
The author marked this model as their own original creation. Imported from Thingiverse.