I designed a special way to display important photos about 2 years ago. The pictures are 3D printed and back lit with LEDs, so the negative of the image is printed and the photo shows when the LED is powered on. The base and lid are carved from Oak.
@anthonym Yes, that is the idea. The 1st Lithophanes were created in the 1820s in France. They would carve into Porcelain. I know it can be done on a CNC router as well. I will have to try one on the fiber laser now.
