Apple Shake 4 Tutorials - Manual (Page 168)

168 Chapter 5 Using Keylight
4 Set screenRange to 0.03.
The edges soften, and the mask is filled in, but some of the hair detail drops off.
5 Return the screenRange value to 0.
You can see that this parameter can be clumsy. The second set of mask opacity controls
are the Gain parameters found in the fineControl subtree. Raise or lower the Gain
parameters to increase or decrease the mask in the shadow, midtone, or highlight
areas.
6 In the Parameters1 tab, click the plus sign (+) next to fineControl to expand the
fineControl subtree.
7 Set the highlightGain subparameter to 0.4.
The noise disappears. (You can turn on the VLUT2 button to see the result.)
Unfortunately, the Viewer reveals that hair detail has been removed. This is bad.
8 To restore the hair detail, set highlightGain back to 0.
Note: To toggle the Viewer between the alpha and color channel views, position the
pointer in the Viewer and press C (for color) or A (for alpha).
highlightGain = 0.4 highlightGain = 0