Room Walls

I was in the model repository and i downloaded a .blend of a room.

Before, whenever i wanted to create a room, i made a plane for all the walls and roof. and it got very complicated while editing things INSIDE the room and moving the camera around.

after i downloaded that blend, i didn’t see any planes for walls. all i saw was a floor, stuff insdie the room, and a ceiling. though when it rendered, there were still walls!

and anybody explain to me how to create walls without it stopping me from moving the camera around easily and eding stuff inside the room easily?

The walls may be on another layer

i. am. stupid. :slight_smile: