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3. Basic operations
3-4. Key
This operation combines the background image with another image. The key definition can be adjusted, and an
edge can be added to the combined image.
Also available as materials besides KEY for combining with the background image are PinP (picture in picture)
and DSK (downstream key). The figure below shows their priorities.
<Key, PinP and DSK priorities>
KEY
PinP
DSK
Background image
How key combinations work is shown in the figure below.
<How key composition works>
HS450
HS450
Background
Key source
Key fill
Output image
Invert