Quote:
Originally Posted by Ducimus
I'm inclined to think that is a masterpiece of special effects and movie editing with a blue screen or something.
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I don't think so, it actually would not be cheaper and significantly more work-intensive if they did so. Even if they closed the Bay Bridge for a few minutes for the heli shot you see at the beginning. In the cable car part, around 2:30 you can see how they worked: they have shut down just a little part of California Street, while the traffic goes on normal up the street.
If you would shoot all this stuff in a blue/green screen you would still need the background images of deserted streets (=road blocks) or some very extensive editing out of all unwanted features from non-static backgrounds.