I am trying to create a very basic rain effect for an animation - have tried playing around with the CC Rainfall effect in After Effects CC 2014. The comp runs for 3 seconds, and all is running smoothly until at random points the effect seems to change direction spontaneously, slows down and then goes back into the original settings I have programmed. Any ideas why this would happen? I have not keyframed any values, so something is glitching. Perhaps this isn't the best method of generating 2D rainfall, has anyone come across this before?