If you want to know how the script works and how I printed the lithophane here is a link to the tutorial: https://youtu.be/PNcGNqMUl5I
EDIT: I changed the link.
@Jakab_Gipsz Thanks for the tips I appreciate it. I aware of the online lithophane of 3DP Rocks but what’s the fun in using that. I wanted to do a curved lithophane in OpenSCAD which is more of a challenge.