There is one pre-comp with one camera in it. I put it into different compositions which have cameras too. I need send info about current active cam from main comp (like pos, point of interest, etc) to camera in pre-comp. These main compositions are different and I don't know how much of it. In this case I can't use an expression on my precomp-cam including name of parent comp (like comp("MainComp").activeCamera) because there are many main compositions.
What can I do?