I agree with ANP. The set might needs a bit more detail, because it took me a while to understand whether that was a wall or a road (and I'm still not sure): if that's a wall, some pillars or something on the roof could help. I mean, anything would help, actually. And also something on the street like a basket, dirt or just a bit of rubbish might add a bit of realism (I have no idea how much work is needed to make all that in Blender, I'm just suggesting what I think might help, and without knowing the context of the scene).
Also, in the other image, I'm not really a fan of the color choice (blue next to a yellow-ish white), but probably it's just the light. And I also think the chamber might need a sink and a toilet (again, I don't know the context of the scene, but I guess he's in some kind of prision, and usually that stuff is in every cell...just saying).
However, the camera in both frames is well placed.