Adobe AFTER EFFECTS CS3 PROFESSIONAL User Manual page 524

Original (left), and with effect applied (right)
Roughen Edges effect
The Roughen Edges effect makes an alpha channel rough and can add color to simulate rust and other kinds of
corrosion. This effect gives rasterized text or graphics a naturally rough look, like that of old typewriter text.
This effect works with 8-bpc color.
Original (left), and with effect applied (right)
What kind of roughening to use.
Edge Type
The color to apply to the edge for Rusty Color or Roughen Color, or to the fill for Photocopy Color.
Edge Color
How far, in pixels, the effect extends inward from the edge of the alpha channel.
Border
Low values create softer edges. High values create sharper edges.
Edge Sharpness
The amount of roughening.
Fractal Influence
The scale of the fractal used to calculate the roughness.
Scale
The width or height of the fractal used to calculate the roughness.
Stretch Width or Height
Determines the portion of the fractal shape that is used to create the roughness.
Offset (Turbulence)
Determines the level of detail in the roughness.
Complexity
Note: Increasing complexity results in longer rendering times. Reduce the Scale value rather than increasing Complexity
to achieve similar results.
Animating this setting results in changes of the roughness 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 layer. Use these controls to prerender your roughen elements into loops, and thus speed up
rendering time. Use the following controls to create a smooth, progressive, nonrepeating loop:
•
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 fractal cycles through before it repeats. The
Cycle
timing of the Evolution cycles is determined by the amount of time between Evolution keyframes.
AFTER EFFECTS CS3 518
User Guide