Could be the angle, but I don't like how the floor looks in the first shot- the texture looks off with the environment. Overall the use of red in the screenshots seems somewhat off- what purpose was there, for the builders of whatever construction this map is set in (I can't tell what it's supposed to be) to paint red stripes down the halls.
I like the second two shots- a lot- though it looks a little bit gloomier than it feels like it should.