[David Barrow]

That’s a good suggestion, only the apparent direction of the flow would go one way and then the other. I was trying to make a loop that looked like water flowing in a certain direction. If the X or Y value goes up toward a central keyframe and then back down toward the ending keyframe, the direction will reverse. I was looking for a way to keyframe a constant movement in on direction that repeats.

Does whatever equation the distortion is based on never repeat? I guess it is some kind of fractal, but some of the other fractal-based effects (like fractal noise) can repeat.