ADOBE AFTER EFFECTS 7.0
User Guide
274
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.
11
Before closing the Effect Controls panel, select Final Output from the View menu. Final Output must be selected
for After Effects to render the transparency.
To remove traces of reflected key color from the image, apply Spill Suppressor using Better for Color Accuracy. If the
image still has a lot of color, apply the Simple Choker or Matte Choker effect.
See also
“Color Difference Key effect (Pro only)” on page 463
“Matte Choker effect (Pro only)” on page 466
“Simple Choker effect (Pro only)” on page 467
To key out a single color with the Color Key effect
1
Select the layer.
2
Choose Effect > Keying > Color Key.
3
In the Effect Controls panel, specify a key color in one of two ways:
•
Click the Key Color swatch to open the Color dialog box and specify a color.
•
Click the eyedropper, and then click a color on the screen.
4
Drag the Color Tolerance slider to specify the range of color to key out. Lower values key out a smaller range of
colors near the key color. Higher values key out a wider range of color.
5
Drag the Edge Thin slider to adjust the width of the keyed area’s border. Positive values enlarge the mask,
increasing the transparent area. Negative values shrink the mask, decreasing the transparent area.
6
Drag the Edge Feather slider to specify the softness of the edge. Higher values create a softer edge but take longer
to render.
See also
“Color Key effect” on page 463
Summary of Contents for AFTER EFFECTS 7.0
Page 1: ...Chapter 1 User Guide...
