User guide
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Control (UI) Default Value Function
displayWindow Background The frame size to output in the event that the fg and bg inputs
are different sizes:
• Background - output the frame size of the bg input.
• Foreground - output the frame size of the fg input.
• Union - output a combination of the bg and fg inputs' frame
sizes.
• Intersection - output an intersection of the bg and fg inputs'
frame sizes. This restricts the output to the area where the
two frame sizes overlap.
clampAlpha enabled When enabled, the output alpha channel is clamped to the 0-1
range. Color channels (RGB) are not affected.
ImageUnpremultiply
This node divides the RGB channels by the alphaChannel when an image is connected to the alpha input.
Otherwise, a is read from the input leaving the alpha channel unchanged.
Also see ImagePremultiply on page240.
Control (UI) Default Value Function
R enabled When enabled, affect the red channel of the image.
G enabled When enabled, affect the green channel of the image.
B enabled When enabled, affect the blue channel of the image.
A enabled When enabled, affect the alpha channel of the image.
mix 1 Dissolves between the original image at 0 and the full
unpremultiplication effect at 1.
Mask
4 NODES I-K | IMAGEUNPREMULTIPLY