Harley Quinn
THE VISUAL EFFECT IS POSSIBLE EVEN WITHOUT LED OR ADDITIONAL LIGHTS AT THE REAR.
With LEDs, it is more clearly accentuated
I created the image with certain plays of light to enhance the lithophane objects.It prints with any FDM, low speed, four perimeters and 100% infll.
layer height 0.12
It can be printed with PLA with light colors.
If you use the colored ones, you will have different effects.