the scene is really great, very good work!
i like it a lot but, some critique, before you spend a pretty much cpu time with final
rendering... the fluorescent lights on the ceiling, they are too simple, you should make
some sort of protection to them, some wire or .. i don't know the words, sorry, but i think
you understand, than again with lights, inside the holder, there should be something
reflective, metal mirror, light like this would be useless in reality.. (add some bloom on final
render

). i see wet on the floor, but only on some parts (the isolated squares), add some
weak bump and try to make "wet" a bit squares around too. btw, more bumpmaps
everywhere, sometimes looks clean but the texture is not, or it looks too clean to be true.
a last finish one thought.. on the clock i read 11:55 and i guess am

, the sum in the
topmost position, but the light from outside does not look like, yeah, maybe it is cloudy,
maybe it is surrounded by high buildings, but would be nice to have a bit direct sunlight on
the stairs, just from artistic reasons, but this is not so easy to achieve with exit portals.
only if you model some extension above the stairs with portal on top and with some pieces
of mesh which will modulate the light.. ahh, one more thing, i really like the reflection of
stairs in train window..
that's all
PS: apologize my bad english