The moon was used on some of my previous projects (Cat on branch watching moon lithophane - moonlight serenade by Jon | Download free STL model | Printables.com, Owl on branch silhouetted by moon lithophane by Jon | Download free STL model | Printables.com, and Owl in flight silhouetted by moon lithophane by Jon | Download free STL model | Printables.com) but was never published by itself. The lithophane must be printed at 100% infill to get the proper effect.
The author remixed this model.