In regard to plugins and filters: is there an echo filter or plugin? What I am thinking of is one that will ripple around a mask or pretermined shape. I know this can be done with layers, masking, and so on, but how about a ripple where you can control the intitial central shape, and the frequency and intensity of the waves? If so what is it called? If not, might it be constructed? Thanks Adam , for starting this discussion, I've learned an enormous amount in the past few days.