A super simple design I threw together in a rush for my wife as a present together with a lithopane. I do believe the stand was modelled while the lithopane was being printed so it is not parameterized. But I do always try to include the CAD-file to enable further tampering. 

Suitable lithopane dimensions (in mm):

Print settings I used

• Layer height: 0.15
• Infill: 10%
• Supports: None