This is the background concept art of the corridor for my story that I drew in photoshop.
I decided to make the corridor look abandoned, and derelict, and kind of post apocalyptic. This would visually explain the absence of humans and why wolves roam the corridors and have taken to living there. I was really inspired by the artwork of the animator David firth. He does very post apocalyptic and run down background designs for his animations.
Here’s some examples of his work that I took inspiration from.