Seamless Loop Wiggle

A wiggle that loops perfectly — essential for MOGRTs, GIFs, and looping backgrounds.

Expression Code

// Seamless Loop Wiggle
// Apply to Position (works on any property)

freq = 2;       // Wiggles per second
amp = 30;       // Wiggle amount
loopTime = 4;   // Loop length in seconds — match your comp or MOGRT duration

seedRandom(index, true);
t = time % loopTime;
w1 = wiggle(freq, amp, 1, 0.5, t);
w2 = wiggle(freq, amp, 1, 0.5, t - loopTime);
linear(t, 0, loopTime, w1, w2);

Apply to Position, Rotation, Scale, or Opacity. Set loopTime to your comp's duration and the wiggle will land back exactly where it started at the loop point — no visible jump. It works by cross-fading between the wiggle sampled now and the same wiggle sampled one loop earlier, so both ends of the loop agree.

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