An extract from my last work...a bridge over a river.All I had was some amatorial photos and some executive of the bridge.I had no reference for the trams (I supposed to use an old version of this vehicle 'cause the location was aged-like).The goal was to simulate the same condition of the over-exposed picture for a reasonable integration.
Modeled in max (except the people..they come from a pay-library), rendered in vray and finished in photoshop CS (also the display at the top of the tram is a text-layer filtered with motion blur in ps).
Here you can find some steps including a wire.
http://www.treddi.com/forum/index.p...e=post&id=11740