Adobe AFTER EFFECTS CS3 PROFESSIONAL User Manual page 399

How input values are combined:
Add Mode
• Adds the values of the two attributes for each pixel. Values above 100% are wrapped around the cycle again.
Wrap
For example, a sum of 125% wraps around to 25%.
• Adds the values of the two attributes for each pixel. Values above 100% are clipped to 100%.
Clamp
• Averages the values of the two attributes for each pixel. Because the average of two values that are each
Average
in the range 0% to 100% is never over 100%, wrapping and clamping by this operation are never necessary. Average
is therefore the safest option for predictable output.
• Screens the second layer over the original layer; the brighter areas in the second layer brighten the first
Screen
layer, and the darker areas in the second layer are discarded. Screen mode is especially useful for compositing fire,
lens flares, and other lighting effects.
The point on the Output Cycle wheel at which the mapping of the input colors begins. A positive value
Phase Shift
moves the starting point clockwise around the Output Cycle wheel.
Animate Phase Shift to cycle colors around the wheel.
Output Cycle controls
Presets for the Output Cycle. The top palettes are designed for quick color correction and
Use Preset Palette
adjustment tasks. The bottom choices offer a variety of built-in color palettes for creative results.
Customize the output color palette by altering the colors and locations of the triangles on the Output
Output Cycle
Cycle wheel. The triangles specify the location on the color wheel where a specific color occurs. The color between
triangles is smoothly interpolated, unless Interpolate Palette is deselected. Each Output Cycle can have 1-64
triangles.
• To change a triangle's location, drag the triangle. Shift-drag to snap the triangle to 45-degree increments.
• To add a triangle, click in or near the wheel, and select a color from the color picker.
• 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.
Note: When you animate the Output Cycle, a triangle's position and color 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
Cycle Repetitions
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
Interpolate Palette
colors are posterized.
Modify controls
Modify controls specify which color attributes are modified by the Colorama effect. 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.
Modify
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