I can't figure out how to add a simple Knoll Factory lense flare over onother layer. I have a layer that contains a Zaxweks animation. I choose new layer, solid. Then add the lense flare. I have used the lens flare before but there is something I can't figure out when this 3D layer is invloved.
I think I figure out the problem. I either didn't have the "3d" icon clicked on the flare layer or blending mode was not set.
The easiest way to add any kind of a lens flare is to place it on a black solid set to Screen or Add blend mode. If you need to line up a lens flair with 3D objects in the scene then you can use an expression to tie the position of the lens flare to the position of a light or other object in the scene.
I could post my solution to that problem here but it's going to do you much more good to read Dan Ebbert's explanation. You'll find it HERE.