try 8xAA and 16xAF... you're gonna love it

some real crits:
-have a look at your fllor texture on the 2nd shot, it's too repetitive.
-your textures are awesome, sometimes they don't stitch together seamlessly.
-the cables are no problem in my eyes.
-the hard shadow looks sometimes weird, esp. at the barrels in the 1st shot.
-really nice illumination in the last shot
-1st shot looks best
-the pipes in shot2 have no connection to the ceiling, looks unnatural
-what's that particle thingy in shot 3? shot1, the sparks are cool, but what's shot3?

in general: nice shader and lighting work, very atmospheric. 2nd and 4th lack detail. bit blocky architecture.