Adding a representation Picture as thumbnail to a non-CAD physical product

We are often integrating and modifying systems of systems of which there is no CAD representation and where the 3D(CAD) view is not required. For this we are creating non-CAD physical products through 3D product Architect or Release Engineer (3DEXPerience object).
How can I create a thumbnail view of the 3DEXPerience object?

Our target is to create a visual product tree - as available through product structure Explorer