Apple Shake 4 - Manual (Page 711)

Chapter 24 Keying 711
In Primatte, you assign color to one of four zones by clicking one of the eight large
operator buttons, then scrubbing for a color in the Viewer. These four zones are
arranged around a center point in 3D color space, with each zone situated like a layer of
an onion. The following diagram shows the operator/zone assignments. Note that the
“decolor all” button scales the entire 3D space, and shifts all color either toward or away
from the foreground. Therefore, it does not involve picking a color, only moving a slider.
Parameters
This node displays the following controls in the Parameters tab:
clipMode
Sets the resolution to that of either the foreground (0) or the background (1).
output
You are not obliged to use Primatte for your composite, especially when you need to
make transformations to the foreground object after the matte is pulled. Pull the matte
on the full-resolution image prior to any scaling. The output setting determines what is
changed by Primatte:
• alpha only: Only the matte is affected.
• on black: The foreground image and the matte are changed.
• comp: If there is a second input image, this composites that background in.