Lithophanes were originally bas-relief artworks made of translucent porcelain that let varying amounts of light through depending on thickness. Now they same effect can be created using a 3D printer and applied to anything from Wonder Woman images to personal photos.
Prop Duster Theory aka Miggy Paras uses the photo-to-lithophane converter from 3dp.rocks. He writes: "I demonstrate how I 3D print my lithophanes and printed two lithophanes at the end. I printed Gal Gadot of Wonder Woman and two boys playing with their sandals. Hi Gal :D"
Here's maker RCLifeOn showing a couple of other examples:
• Lithophanes – Photo Light 3D Printing Ft. Wonder Woman Prop Duster Theory