To be honest, it doesn't make sense with the stock, and then the city background with lights. It just randomly crosses over. On the right it goes from a brick background to city, and the C4d just clashes in the middle, and if there was supposed to be depth, it'd be better if there was depth between the guy and the brick wall. On the left theres some odd black thing pointing down into the city, I don't know what that is, and the green in the C4D just doesn't go well. Also, in this sig you could take out the border and it'd still look pretty much the same.