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Using Help | Contents
5 Select the Black eyedropper, and then click inside the matte thumbnail on the lightest
area of black to specify transparent regions. The transparency values in the thumbnail and
Composition window are adjusted.
6 Select the White eyedropper, and then click inside the matte thumbnail on the darkest
area of white to specify opaque regions. The opaque values in the thumbnail and the
Composition window are adjusted.
To produce the best possible key, make the black and white areas as different as you
can so that the image retains as many shades of gray as possible.
7 Select a matching accuracy from the Color Matching Accuracy menu. Choose Faster
unless you are using a screen that is not a primary color, such as orange. For those screens,
choose More Accurate, which increases rendering time but produces better results.
8 If you need to further adjust transparency values, repeat steps 5 and 6 for one or both of
the partial mattes. Click the Partial Matte B button or the Partial Matte A button to select a
partial matte, and then repeat the steps.
9 Adjust transparency values for each partial matte and for the final matte by dragging
one or more of the following slider bars in the Matte Controls section:
Black slider bars adjust the transparency levels of each matte. You can adjust the same
•
levels using the Black eyedropper.
White slider bars adjust the opaque levels of each matte. You can adjust the same levels
•
using the White eyedropper.
Gamma slider bars control how closely the transparency values follow a linear
•
progression. At a value of 1 (the default), the progression is linear. Other values produce
nonlinear progressions for particular adjustments or visual effects.
10 When adjusting individual mattes, you can choose the following views from the View
menu to compare the mattes with and without adjustments:
Choose Uncorrected to view a matte without adjustments made by the slider bars in
•
step 9.
Choose Corrected to view a matte with all adjustments made by the slider bars in step
•
9.
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