By dissecting another AE comp, I stumbled upon a very obvious answer. Being new at this, I was working back instead of forward. By going to the layer in the pre-comp and using this expression: comp("Comp").layer("Layer").effect("Slider Control")("Slider") I wa...

Can you manipulate layers in one comp from another. I am trying to: A: To rotate columns using a slider expression that are nested twice because of an effect I used that required this. B: I am also using 3d obj's through 3d Invigirator, and wish to control/parent the camera in the other comp with th...