Nicolaudie Architectural Forum

I searched in different forums, but I did not find an answer: Is there a possibility to make 3D objects solid, so no beams can get through them? It´s irritating, when all beams that should stay inside the stage, are shining through the walls as if they were thin air, and interfere with other lights outside the stage.
Is there any way to stop this?

Unfortunately not, this would take too much CPU time to render.