Adobe 65008009 - After Effects CS4 Using Manual page 498

Last updated 12/21/2009
• Values above 255 or below 0 are reflected back into the 0-255 range. For example, a value of 258 (255+3)
Wrap Back
is reflected to 252 (255-3), and a value of -3 is reflected to 3. With this setting, Contrast values above 100 increase
complexity and detail.
How randomly the pattern is drawn. Lower values cause more uniform or gridlike cell patterns.
Disperse
Note: If you set the Disperse value above 1.0, set the layer to Best quality to avoid artifacts.
The size of the cells. The default size is 60.
Size
Determines the portion of the fractal shape used to create the pattern.
Offset
Choose Enable Tiling to create a pattern built of repeating tiles. Cells Horizontal and Cells Vertical
Tiling Options
determine how many cells wide and how many cells high each tile is.
Animating this setting results in changes of the pattern over time.
Evolution
Note: Although the Evolution value is set in units called revolutions, it's important to realize that these revolutions are
progressive. The Evolution state continues to progress infinitely at each new value. Use the Cycle Evolution option to
return the Evolution setting to its original state at each revolution.
Evolution Options provide controls that render the effect for one short cycle and then loop it for
Evolution Options
the duration of your clip. Use these controls to pre-render cell pattern elements into loops, and thus speed up
rendering time.
•
Creates a loop that forces the Evolution state to return to its starting point.
Cycle Evolution
•
The number of revolutions of the Evolution setting that the cell pattern cycles through before it repeats. The
Cycle
amount of time between Evolution keyframes determines the timing of the Evolution cycles.
Note: The Cycle control affects only the state of the cell pattern, not geometrics or other controls, so you can get different
results with different Size or Offset settings.
• Specifies a value from which to generate the cell pattern. Animating this property results in flashing
Random Seed
from one cell pattern to another (within the same cell pattern type), which is not usually the result that you want. For
smooth transition of the cell pattern, animate the Evolution property.
Note: Create new cell pattern animations by reusing previously created Evolution cycles and changing only the Random
Seed value. Using a new Random Seed value alters the cell pattern without disturbing the Evolution animation.
Checkerboard effect
The Checkerboard effect creates a checkerboard pattern of rectangles, half of which are transparent.
This effect works with 8-bpc color.
The point of origin of the checkerboard pattern. Moving this point offsets the pattern.
Anchor
How the dimensions of the rectangles are determined:
Size From
•
The dimensions of each rectangle are the dimensions of the rectangle with opposite corners defined
Corner Point
by the Anchor and Corner points.
•
The height and width of a rectangle are equal to the Width value, meaning that the rectangles are
Width Slider
squares.
•
Width & Height Sliders
the Width value.
Thickness of the edge feather within the checkerboard pattern.
Feather
The color of the nontransparent rectangles.
Color
The height of a rectangle is equal to the Height value. The width of a rectangle is equal to
USING AFTER EFFECTS CS4
Effects and animation presets
492