Octorox said:They did lie outright although it is a bit different than simple bluescreening because it is a live conversation and the did have like 30 cameras pointed at her. I believe its called a "tomogram" when a 3d image is composited in a scene live. They could change camera angles and whatnot and she would still be in the right place.
That part of the technology is actually pretty cool. The processing power required to combine images from 30 video cameras and coordinate that with the roving camera angles in the studio, all in realtime, must be pretty hefty.