This article explains with an example on how a composition can be created in ArtiosCAD so that the composition can be used in Studio applications. The same procedure can be adopted for your structural designs.
We shall create a composition as shown in the screenshot given below.
To do this, you will need:
The CAD file of the box.
The CAD file of the tray.
The try_out_files.zip attached with this article has all the files for you to try out.