Can anyone tell me how to parent transform data between two different comps? Specifically, I have a 3D cube created and saved as a PSD. In AE, I have a comp with an animated camera. I would like to parent the parent controller in the PSD comp to the camera in the original AE comp. The end result I am looking for is to have the 3D cube rotate and translate in synch with the original camera such that it appears that the cube is part of the original scene. Thanks.
You can open the timeline of the PSD comp side by side with the main comp and use expressions to link a camera that you create in the cube (PSD) comp with the camera in the main comp. This way the perspective of the cube will change as you move the main camera.