Nice work. I think mateo's got a point, the light inside could be of a different colour. Yellowish might be right and just a tint of it, only to make strenghten the impression that they are electric lights not natural. Halogen tube lights give a slightly green colour. There's something odd with the concrete at lower left corner. How about some rubble and garbage to the ground, especially to the corners. Otherwise, splendid work. I like the tiles and the graffiti. -HK