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:
http://antdiy.blogspot.com.au/2015/11/project-3d-printed-lithophanes.html
Body.SLDPRT | 677.5KB | |
Body.STL | 181.7KB | |
LED_holder.SLDPRT | 396.5KB | |
LED_holder.STL | 43.9KB | |
Top.SLDPRT | 249.5KB | |
Top.STL | 47.8KB |