Lithophane Frame
thingiverse
Check out this video at youtu.be/vYLtlG359LE - I had to leave the lithophane itself behind because of copyright laws.
Download Model from thingiverse
With this file you will be able to print Lithophane Frame with your 3D printer. Click on the button and save the file on your computer to work, edit or customize your design. You can also find more 3D designs for printers on Lithophane Frame.