How to get lens flare when use alpha channel?

Hello, there is a metallic object crossing the screen in my scene. That object emits lens flare.
I used Movie Render Queue to obtain the sequence with alpha channel (my intention is to place a background with After Effects).
The problem is that lens flares appear clipped only within the outline of the object.
Is there a way to get a render pass with the lens flares?

Thanks!

Hi, did you solve the problem? :slight_smile: