Advice on my scene: dark lit room

I plan to put the following scene as a main menu background for a personal project of mine.
I haven’t added the particle effects and god rays just yet as they would steal the eye from my question: lighting and composition.
The floor is pretty much done, but the walls are not nearly good enough. Any advice on camera placement and light rig? The goal is to be gloomy here.
EDIT: note that the floor is rendered separately from the walls.
the first image is how I placed my lights.

the second is the current image: I plan to blur the walls but I’m unsure of the blur amount

the last is the sharp bg:

all the help appreciated.

Have you tried using AO?

No extra lighting needed, and it will stop your blacker sections being drowned out in the darkness :slight_smile: