Expression Random Noise Every N Frame

Autodesk Smoke Tips & Tricks - Expression Random Noise Every N Frame

ref to tip Noise Every N Frame, the expression for generate random noise every N frame is :

noise(floor(frame/5))* 100

replace the '5' with whatever amount (frame) you want the noise to stay the same. '5' here mean generate a random value every 5 frame.

replace the 100, the bigger the number, the bigger the noise.