you appear to have a hexaganol line on the grated manhole on the left? (where the metal is missing)was this meant to be?....no I think the lighting is good (Im no expert). Maybe the fog should have motion toward the roof (the pressure inside should be less?) where the hole is?....maybe a tad of bump on the rust...still..pretty damn good mate.
cheers bullet
bullet1968
"A Darkness at Sethanon", a book I aspire to model some of the charcters and scenes