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 the look of old typewriter
text.
This effect works with 8-bpc color.
Original (left), and with effect applied (right)
- Edge Type
- What kind of roughening to use.
- Edge Color
- The color to apply to the edge for Rusty Color or Roughen
Color, or to the fill for Photocopy Color.
- Border
- How far, in pixels, the effect extends inward from the edge
of the alpha channel.
- Edge Sharpness
- Low values create softer edges. High values create sharper edges.
- Fractal Influence
- The amount of roughening.
- Scale
- The scale of the fractal used to calculate the roughness.
- Stretch Width or Height
- The width or height of the fractal used to calculate the roughness.
- Offset (Turbulence)
- Determines the portion of the fractal shape that is used
to create the roughness.
- Complexity
- Determines the level of detail in the roughness.
Note: Increasing
complexity results in longer rendering times. Reduce the Scale value rather
than increasing Complexity to achieve similar results.
- Evolution
- Animating this setting results in changes of the roughness
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 layer.
Use these controls to pre-render your roughen elements into loops,
and thus speed up rendering time. Use the following controls to
create a smooth, progressive, nonrepeating loop:
- 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
fractal cycles through before it repeats. The amount of time between
Evolution keyframes determines the timing of the Evolution cycles.
Note: The
Cycle control affects only the state of the fractal, 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 roughness texture. Animating
this property results in flashing from one set of fractal shapes
to another within the same fractal type. For smooth transition of
the roughness, use the Evolution control.
Note: Create new roughness
animations by reusing previously created Evolution cycles and changing
only the Random Seed value. Using a new Random Seed value alters
the noise pattern without disturbing the Evolution animation.
