Oculus Home Shelf Rebuild

Hello everybody,
I hope I found the right thread for this topic.
I’m trying to recreate something similar to the shelf from Oculus Home from which you can take your 3D objects to then place them virtually in space.
This is probably done with a widget, but I do not understand how to create this three-dimensional effect. So the box including the 3D object in it.
I hope someone can help me.

Thanks in advance.