Adobe After Effects - Manual (Page 623)

Note:
Cycle Repetitions
Interpolate Palette
Modify
Modify Alpha
Note:
Change Empty Pixels
Matching Color
Matching Tolerance
Matching Softness
Matching Mode
Mask Layer
To duplicate a triangle, Ctrl-drag (Windows) or Command-drag (Mac OS) the triangle.
To delete a triangle, drag it away from the wheel.
To change the opacity, select a triangle on the color wheel and then drag the attached triangle above the opacity slider. Make sure that
Modify Alpha is selected if you want the opacity information to affect your output.
When you animate the Output Cycle, the position and color of a triangle are interpolated between keyframes. For best results, make sure
that all keyframes have the same number of Output Cycle triangles.
How many iterations of the Output Cycle the input color range is mapped to. The default value of 1 maps the input range to
one iteration of the Output Cycle, from input black at the top of the Output Cycle wheel, clockwise to input white at the top of the Output Cycle
wheel. A value of 2 maps the input range to two iterations of the Output Cycle. Use this option to create a simple palette and repeat it many times
throughout a gradient.
Colors between triangles are interpolated smoothly. When this option is deselected, output colors are posterized.
Modify controls
Modify controls specify which color attributes the Colorama effect modifies. For subtle refinement of images, choose the same color attribute for
Input Phase and Modify. For example, choose Hue from both menus to simply adjust Hue.
The color attribute to modify.
Modifies alpha channel values.
If you apply Colorama to a layer with an alpha channel, and the Output Cycle doesn’t contain alpha information, the anti-aliased edges of
the layer may appear pixelated. To smooth the edges, deselect Modify Alpha. If Modify Alpha is selected and the Output Cycle contains alpha
information, the output is affected even if you’ve selected None from the Modify menu. Using this method, you can adjust the levels of only the
alpha channel without also changing the RGB information.
The influence of the Colorama effect extends to transparent pixels. (This setting works only if Modify Alpha is selected.)
Pixel Selection, Masking, and other controls
These controls determine which pixels the effect affects. For the Matching controls for Pixel Selection to work, Matching Mode must be set to
anything other than Off.
The center of the range of colors of pixels that the Colorama effect modifies. To select a specific color in the image using the
eyedropper, turn off the Colorama effect temporarily by clicking its Effect switch in the Effect Controls panel.
How far a color can be from Matching Color and still be affected by the Colorama effect. When Matching Tolerance is 0, the
Colorama effect only affects the exact color selected for Matching Color. When Matching Tolerance is 1, all colors are matched; this value
essentially turns off Matching Mode.
How smoothly the matched pixels blend into the rest of the image. For example, if you have an image of a person wearing a
red shirt and blue pants, and you want to change the color of the pants from blue to red, subtly adjust Matching Softness to spread the matching
from the blue in the pants into the shadows of the pants folds. If you adjust it too high, the matching spreads to the blue of the sky; if you adjust it
even higher, the matching spreads to the red shirt.
What color attributes are compared to determine matching. In general, use RGB for high-contrast graphics and Chroma for
photographic images.
The layer to use as a matte. Masking Mode specifies what attribute of the Mask Layer is used to define the matte. The matte
determines which pixels of the layer to which the effect is applied are affected by the effect.
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