How do you ad a wall or ceiling in 3D view?

[Yards]

My venue is 2 floors and a balcony with some small rooms. How do you ad a ceiling or walls to the 3D view and have the light hit them?

One of the main issues at hand is that I have several lights on top of each other on different floors. So the end result is the lower lights combines with the upper light. In reality the lower light would hit a ceiling and should never mix with the upper light.

Thanks

[support]

3DView is not really made to manage two different floors.
Not sure there is a solution.
Please send your lightshow ; we will take a look.

[BuBulle]

A process to manage several view for the same universe would be helpful.
I will try with copies of 3D view files, if this works I will post a reply.