I added some point lights that form a letter. Then I added an optical flare (AE plugin FX) with source type "track lights" to get light dots from the light layers.
This works fine and looks as follows:
optical flare layer FX light layer1 (point) light layer2 (point) light layerN (point)
Now I of course want to create several letters. Therefore I group the light layers each in a composition that represents a letter. Of course I do not want to dublicate the optical flare layer into all my compositions, but move it out and just have one flare layer that is FX for all lights:
[optical flare layer FX] [light composition A] [light composition B] [light composition C]
Problem: As soon as I move the optical layer out of the light compositions, the FX is not applied anymore to the lights that are contained inside the multiple compositions.
Why? How can I let the light layers of my compositions "shine through" to the parent layer, and apply the flare FX there with only one single FX layer?