Oh, I see, you're using Animation Shop, I misunderstood then. I see now how you used it and it makes perfect sense there.

I used to have a program that applied that effect automatically, I'm not sure if it was part of Cool3D or something else but I don't know where the program is anymore. It was espescially nice for using in things you wanted to look like movie logos. I've always liked that animated backlight effect.