I am visualizing this as some kind of an effect that you would achieve using a Sequence Editor filter. I’m not sure what one it would be, or if maybe it would have to be a custom one. But basically, a layer consisting of a map, generated (say) with a particle system, would provide input for distorting the underlying portion of the image. The darker the map-area, the more input would be taken from “nearby” pixels. But the bottom line is that this is, to me, an effect that is most easily described in two dimensions… and applied to the graphic after it has been rendered.