User Manual

Key Tab
The Key tab is where most keying begins. It is used to select the screen color.
Background Color
This is the color of the blue or green screen, sometimes called the screen color. To create the
key with the Delta Keyer, use the background color Eyedropper to select the screen color from
the image.
Pre-Blur
Applies a blur before generating the Alpha. This can help with certain types of noise, edge
enhancements, and artifacts in the source image.
Gain
Gain increases the influence of the screen color, causing those areas to become more
transparent.
Balance
A color difference keyer, like the Delta Keyer, compares the differences between the dominant
channel determined by the selected background color and the other two channels. Adjusting
balance determines the proportions of the other two channels. A value of 0 uses the minimum
of the other two channels, where a value of 1 uses the maximum. A value of 0.5 uses
half of each.
Chapter – 98 Matte Nodes 2152