|
In the day (1972) this was a blue screen effect called Chromakey. Green came later. It is a "keyhole" process. The talent camera...all of them...sees the band against blue. The side shots show no blue. The video switcher removes the blue and inserts the background with adjustments to make the blue trigger the sensitivity of the switcher to the shade and lighting of the blue. The whole production was done in the effect as you never see the blue screen though you can see the edges of the filled in screen on a few shots. It was 60's/70's video trickery until better digital effects came along.
__________________
“Once you eliminate the impossible...whatever remains, no matter how improbable, must be the truth." Sherlock Holmes.
Last edited by Dave A; 05-07-2019 at 09:40 AM.
Reason: typo
|