
I looked all through the effects and asked a few other people, but I can't seem to find an effect that can replicate "exposure".
Basically, I have a circle (a note from a video game, think a spinoff of DDR) that's bright. The note is going up the screen, and as it goes up, I want it to leave a blurry after-trail of itself, similar to when you leave the exposure open on a camera and light trails are created.
I've tried a bunch of things, does anyone know if there's a technique or effect specific to doing this?