Improve lighting and walls This is a render (with Cycles) of a building entrance hall.
First, I need a cement walls painted white. How can I do it using only nodes?
For lighting I'm using two point lights on the roof and one emission node inside the elevator. How can I improve de lighting of the scene to achieve photorealism?
For the cement you could overlap 2 (or more) levels of noise, one very thin for the cement texture, and one much bigger for some holes. Also maybe try a bit of glossiness with a Layer Weight as factor. Iit would give something like that:

It can also be more subtle: