I am pretty sure I have tried changing every setting just to see if it would improve anything.... It didnt.
I normally use the Lithophane creator from 3dp.rocks but I wanted to rule out any issue with the .STL itself so I also created a Lithophane from lithophanemaker.com and continued to have the same results.
I also removed the side stands to see how it would slice with no other objects, it still removed the bottom
I can pull normal prints that I have printed before (non Lithophanes) and run them through S3D with the exact same settings with no probems at all, that lead me to believe that it was an issue with the .STL. But I can run the exact same .STL file through PrusaSlicer with no issues.
S3D works particularly well with my XMax so its driving me nuts that I cannot figure out whats wrong.
Thank you for any help
S3D Version 4.1.2