If you look at the difference between the noise layer and the wiggle layer you’ll see that wiggle wanders more, where noise keeps returning to the center. The * 500 scales the movement up so that it fills the comp, and to move it to the center I added the layer’s original position to the expression adding the term value. To create interesting movement I slipped the x and y components out of phase (more on that later). The reason why I added 12345 to the time for the y component was that if I’d used noise(time) for both terms, they would have always been the same, meaning the layer would just move along a diagonal line.
noise always returns the same result for the same input, so to get it to change over time, I used time as the input.
This is why I had to call it twice, once for each component of the position vector. Value + * 500Īccording to the Adobe docs, noise can take a number or an array as its one parameter, but it always returns a number between -1 and 1.
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