Lightbox for Lithophane.
Make your lithograph max. 3 mm thick and the dimensions 17.8 mm x 12.8 mm.
Place the litho on the edge of the lightbox and glue the edges to the lightbox on the inside of the lightbox.
See also my other uploads of lightboxes and clocks.
https://makerworld.com/en/u/1835453854
If you want something that is not listed, please send me a message and I will see what I can do.
Greetings Antoine