13, Apr 2006 21:39
From Gary Berendsen
The following procedure provides a basic overview of how to create a seamless loop using the Fractal Noise effect.
To create a seamless Loop:
1. Select a layer in the Timeline window, and choose Effect > Render > Fractal Noise.
2. Set two keyframes for Evolution.
3. Adjust the time between keyframes and the number of Evolution revolutions until you are satisfied with the animation of the noise.
4. Select Cycle Evolution.
5. Set a value for Cycle. (The evolution completes the number of revolutions you specify for Cycle in the amount of 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.)
6. Initially, the last frame of a cycle is identical to the first frame. To create a seamless loop, skip the last frame by 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.
8. Move the current-time indicator back one frame.
9. Trim the layer's Out point at this frame.
10. Prerender this layer, and import it into your project.
11. Select the file in the Project window, and choose File > Interpret Footage. Then set Loop to the number of loops required for the duration of the layer in the project.