User Manual

Inspector
Aux Channel Tab
This tab includes a series of menus where you select a source for the auxiliary channels of the
output image.
Enable Extra Channels
When the Enable Extra Channels checkbox is selected, the Channel Booleans node can output
images with channels beyond the usual RGBA. Once enabled, the remaining controls in the
Aux Channels tab can copy data into the auxiliary channels.
Examples
To copy the Alpha channel of one image to its color channels, set the red, green, and
blue channels to Alpha BG. Set the Operation to Copy.
To copy the Alpha channel from another image, set operation type to Alpha FG.
To replace the existing Alpha channel of an image with the Alpha of another image,
choose “Do Nothing” for To Red, To Green, and To Blue and “Alpha FG” for To Alpha.
Pipe the image containing the Alpha into the foreground input on the Channel Booleans
node. Set Operation: “Copy.” The same operation is available in the Matte
Control node.
To combine any mask into an Alpha channel of an image, choose “Do Nothing” for
To Red, To Green, and To Blue and “Matte” for To Alpha. Pipe the mask into the
foreground input on the Channel Booleans node. Set Operation: “Copy.”
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