My only complaint is there transition between the upper right and upper left panel, especially at the "crossroad" of the four panels.
And some of my stuff:
concrete type 1 (original ME texture on the right, my completely-from-scratch custom one on left)

Ingame, the black marble tiles are my custom ones too:

concrete type 2 (original on the left, custom on the right, will be redone since I accidently made it on 512x512

)

ceiling tile type 1 (my most recent addition as of yesterday. original on the right, custom on the left)
