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To create a seamless loop using Fractal Noise
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Select a layer in the Timeline panel, and choose Effect > Noise & Grain > Fractal Noise.
Set two keyframes for Evolution.
2
Adjust the time between keyframes and the number of Evolution revolutions until you are satisfied with the
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animation of the noise.
Select Cycle Evolution.
4
Set a value for Cycle. (The evolution completes the number of revolutions you specify for Cycle in the amount of
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time determined by the distance between Evolution keyframes. Determine the Cycle value by considering how much
of this cycle you need to render before it repeats. The length of the project and use of the cell pattern created
determine this. Choose the shortest length appropriate for your project to save rendering time.)
Initially, the last frame of a cycle is identical to the first frame. To create a seamless loop, skip the last frame by
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setting the Out point of the layer one frame before the last frame of the cycle.
7
Move the current-time indicator to the point on the timeline where the cycle completes. For example, if the Cycle
is set to 2, locate the frame on the timeline where the Evolution value is 2.
Note: If you set keyframes for other Fractal Noise controls, return them to their initial settings where the cycle begins to
repeat in the timeline or the controls don't loop.
Move the current-time indicator back one frame.
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9
Trim the layer's Out point at this frame.
Prerender this layer, and import it into your project.
10
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Select the file in the Project panel, and choose File > Interpret Footage. Then set Loop to the number of loops
required for the duration of the layer in the project.
Match Grain effect
This effect works with 8-bpc and 16-bpc color.
Original (left), and with effect applied (right)
See also
"To match noise or grain between images" on page 361
"Working with added or matched grain" on page 363
Median effect
The Median effect replaces each pixel with the median pixel value of neighboring pixels within a given radius. At low
values, this effect is useful for reducing some types of noise. At higher values, this effect gives a layer a painterly effect.
This effect is the same at both Draft and Best quality. Use Radius to specify how many pixels to examine for the
Median effect. For instance, when Radius is set to 1, the Median is performed on the eight neighboring pixels that
are within one pixel of the center pixel.
ADOBE AFTER EFFECTS 7.0
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