looks like it is a matter of materials
do you have any specifications?
not too much. the metal beams can be any of your basic bridge colors (greenish, blueish, grayish, dark orange/red). the only thing that i would like is that the stone towers look like giant stone blocks stacked up, but i might have to actually build the towers up out of individual blocks to have that look.
Josh Nieman made me a rendering the other day and it looked great, but I would still like some more... this way i can possibly pick and pull from different renderings and see/learn the different methods you guys use.