Adobe After Effects CS3 - Manual (Page 430)

AFTER EFFECTS CS3
User Guide
425
• Wrap Back Values above 255 or below 0 are reflected back into the 0-255 range. For example, a value of 258
(255+3) 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.
Disperse How randomly the pattern is drawn. Lower values cause more uniform or gridlike cell patterns.
Note: If you set the Disperse value above 1.0, set the layer to Best quality to avoid artifacts.
Size The size of the cells. The default size is 60.
Offset Determines the portion of the fractal shape used to create the pattern.
Tiling Options Choose Enable Tiling to create a pattern built of repeating tiles. Cells Horizontal and Cells Vertical
determine how many cells wide and how many cells high each tile is.
Evolution Animating this setting results in changes of the pattern over time.
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 Evolution Options provide controls that render the effect for one short cycle and then loop it for
the duration of your clip. Use these controls to prerender cell pattern elements into loops, and thus speed up
rendering time.
• Cycle Evolution Creates a loop that forces the Evolution state to return to its starting point.
• Cycle The number of revolutions of the Evolution setting that the cell pattern cycles through before it repeats. The
timing of the Evolution cycles is determined by the amount of time between Evolution keyframes.
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.
• Random Seed Specifies a value from which to generate the cell pattern. Animating this property results in flashing
from one cell pattern to another within the same cell pattern type. For smooth transition of the cell pattern, use the
Evolution control.
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.
Anchor The point of origin of the checkerboard pattern. Moving this point offsets the pattern.
Size From How the dimensions of the rectangles are determined:
• Corner Point Each rectangle’s dimensions are those of the rectangle with opposite corners defined by the Anchor
and Corner points.
• Width Slider A rectangle’s height and width are equal to the Width value, meaning that the rectangles are squares.
• Width & Height Sliders A rectangle’s height is equal to the Height value. A rectangle’s width is equal to the Width
value.
Feather Thickness of the edge feather within the checkerboard pattern.
Color The color of the nontransparent rectangles.