Lithophane of a Moon picture I took using a Zhumell Z12 telescope and Nikon d5300 camera. Three different versions....Flat, Flat with base, and Curved. Flat version can be used within the Lithophane LED frame I have included within my designs and is linked below, just would have to size the lithophane to 5" x 3.75" x .157" (can have it thicker, just would stick out a bit from the frame, but still looks pretty cool). You can see it in the frame in the video below.

LED frame for Lithophane: https://www.thingiverse.com/thing:3621412

To make it darker around the moon, I did spray paint the back of the lithophane black for the places that needed to be black.

White PLA or ABS
100% infill
4-6mm thickness
Shell Thickness: what ever the object thickness is divided by two
Layer thickness: .06 or lower