Tracer effect

I have been trying on and off for a couple of months to figure out how to duplicate a movie clip in motion on the main stage to achive a clean fade out behind the clip.

I have made a crappy effect duplicating a tween and offsetting it but it takes to long to reproduce and it doesn’t look as great as I would like it to.

Here is a link to the crappy version of the effect I’m attempting to achieve.

click to the crappieness

Forgive the corny-ness of the site, I was on a brushed steel kick