How to make the background transparent in a AE comp?
Based on an Illustrator file I have made an animation in AE.
This comp will be plased on topp of a video in AE.

One the first photo you can se the comp on topp of the video.
One the second the Illustrator file. There you can see I have made a semi transparent layer, I want to use as background.
I want to have the background transparant in the ae cop, instead of black. How to?
