Interior War Bunker

Initially this was just a arnold lighting and rendering project. But as I intended the environment to be a game environment, I decided to place this into Unreal.
I modelled and textured the assets in this scene. I was on a time restraint so could not add any more assets.

I was aiming to create a generals' or war office situated in an underground bunker set in the 1940s with an borderlands or Tell-Tale style, black outlines, hatched shading and/or obvious grunge.
I also used the PBR workflow.
The scene came to 41732 tris and 24161 faces

This will give you an understanding of how I got my arnold compositions. I am learning and if you have any advice and feedback, It would be very much appreciated.