Here's an image of a wiggle() with 1 octave: It will preserve the overall effect of the wiggle but create additional 'sub-wiggles' that add detail. This is similar to the 'Complexity' of the Fractal Noise effect. The above, for example, will wiggle with a frequency of 1 Hz, an amplitude of 10 but with 3 octaves. You can pull up the graph editor to see the wave form that is created! If you supply a value for the 3rd property in the wiggle you can increase the number of octaves from the default: The first two properties supplied to wiggle (frequency and amplitude) are required for the expression to work, the rest of them are optional. You can use a simple wiggle expression on position to emulate some nice camera shake in after effects very easily.