Lithophane Box

Lithophanes :
Choose 4 picture files with high contrast. Make them square and black and white. Boost contrast if needed.
Go to http://3dp.rocks/lithophane/
Download image files
Set image to positive, border to 2mm, thickness to 3mm, max size to 100x100mm
Refresh and download .stl files
Generate .gcode files for lithophanes from your favorite slicer / PLA : 0.100, solid (100% infill) / no support required
Print in white (or very clear sepia for vintage effect)

Box
Download .stl files
Generate .gcode files from your favorite slicer / 4 edges (horizontally printed) + 1 top + 1 bottom / 0.150, 40% honey comb infill / no support required
Print in black PLA

Light
I used a white 12v 60mm LED ring from ebay.com
with a transformer (https://addison-electronique.com/transformateur-classe-2.html)