Hello, I made Momo and Appa keychains I've made them using lithophane sight named 3DP rocks then I cut the model placed the background, and printed it.
In order to print it in two colors you can have either a multicolor printer or a single color printer as I have and use the command “M600” in order to make a manual filament swap, you can resume the printing and print with a different color, I tried making several versions with white background and black outline and the other way around as you can see in the pictures.
when I printed those files I scaled down the Z size of each model so they both are at the same height when the change between the background and the outline happens.
YardenSZ
