hi,
I like the background of the not all red one. It gave me an idea…yours if ya want it or toss it…it is your creation…
but was thinking it would be really cool if it was a bit further back and more colliseum/cell like and more lost souls could be seen faintly in various cells. That would I think make it seem much grander in scale…you can use depth and fog for such a thing.
Play with various lighting too…you’re almost there…take your time…you are doing great so far!!!