A video tutorial on how to create a lithophane lampshade can be found here: https://www.youtube.com/watch?v=caX-OEEtzTo

The online tool is available at https://lithophanemaker.com/

Give the tool pictures, and this free online tool spits out a lithophane lampshade. The tool allows you to customize the interface between the lamp and the lithophane lampshade, so that the lithophane lampshade you create will fit with a lamp you already have on hand.