What was the workflow for the background plates? Did you break the photos apart and actually build a 3d room for the basement scene? Were the city ground plates laying flat on the z plain or were they directly behind you blue screen footage? Did you light the plates in AE?
Would you please post a frame or two (in full resolution) of the original untreated footage?
It would be very interesting to see the blue-screen shot as it looked before keying.