This is a 200mm square HueForge color lithophane with 4 colors. It's designed to be back lit, and there are several light box designs that will work for this. I tried to make the design such that it looks good both with the intended back light, as well as when front lit with the light off. The model includes a 3mm thick border for ease of use/installation in a light box. This can be printed with an AMS by adding filament changes, or without an AMS by adding pauses to manually swap the filament.

Print settings:

• 0.16mm base layer
• 0.08mm layer height
• 100% infill
• Ironing on all top layers - 25% flow rate
• 5mm brim
• Aux fan off

The filament brands and colors used, as well as the layers at which to add the filament changes or pauses are as follows:

• Start with Overture matte white
• At layer #5 (0.48mm) change to Elegoo matte ice blue
• At layer #9 (0.8mm) change to Overture matte purple
• At layer #15 (1.28mm) change to Overture matte navy blue

If you don't have these specific colors but want to try to get something close, the TD values I used are:

• Overture matte white: 3.7
• Elegoo matte ice blue: 3.0
• Overture matte purple: 0.9
• Overture matte navy blue: 0.2

If you print this please share your photos of the finished print!

The light box design was based on the cheap salt rock lamp bases, and I can share that design too if there's enough interest.