Hi, these are fully customizable and parametric case and frame files. They are meant to be used for 2D art, Lithophanes or even photos and postcards. The customization is apllied within Fusion360, where all parameters are variables. I've used the standing case and the frame for QR Codes and 2D Art pieces as shown on the pictures. I tried to name all parameters so they are almost self explanatory, but I will add a list of them with explanations below. Tinker around with the parameters until you like what you see.

The difference between the case and the frame is, the case is supposed to stand upright without any elements for wall mounting. The frame is meant to be hung on a wall with two screws/ nails or even just with double sided tape.

Feel free to leave me some feedback or suggestions in the comments and please let me see your prints.

Parameter:

ImageWidth / ImageHeight: The actual width and height of yor 2D piece
ImageDepth: The thickness of your 2D piece in z direction
FrameWall: The Thickness of the walls
Step - The step the 2D piece is placed on within the frame/case
Hole : Diameter of the screw/ nail holes
Tolerance: Adds a given tolerance to ImageWidth and ImageHeight to make the 2D piece fit easily into the frame
FrameDepth: The Thickness/ Height of your frame in z-direction 

Frame only:

MountingLen: length of the crossbar with the screwholes
MountingThick: extrusion thickness of the crossbar 

Case only:

BackWall: Thickness of the backwall

Links

How to use parametric design in Fusion https://www.youtube.com/watch?v=3GQHaYdmULs&t=663s