british science festival: 40 years of star wars
TRANSCRIPT
Compositing
• Compositing is combining separate visual elements into a single image.– This is usually to create the illusion that all the
elements are part of the same scene
Star Wars - Empire Strikes Back (1978)
Multiple Exposures
+ =• Two images are exposed on to
the same piece of film
• Equivalent to adding images together
• Can be done in camera Yankee Doodle Dandy (1942)
Bipack
x =• Light is shone through pieces of film packed
together in a post-production process
• Equivalent to multiplying images together.
The Travelling Matte and Keying
• Required to mask moving shapes
• Commonly produced using chromo keying
The Thief of Bagdad (1940)
Keying with Film
xBlue Filter Film
=Exposed onto high contrast
black and white film to desaturate
A negative of the mattecan also be produced