I read that lithophane artists uses jewelers wax , light box and carving tools to produce their originals. Than it goes to porcelain pouring and heat step.
I saw a Picture where artists carving a large thin block of wax and it is so exciting. The image in front of lightbox was wonderful. If we dichromate a transparent piece of large gelatin and expose negative on it , would final reliefed gelatin be similar effect in front of light box. I dont have any idea about the transparency of gelatin and necessarity of its whether pigmented or not and depth of the relief.