This feels like a logic problem, but maybe it’s more complex.
I am rotoing out an actor from the background as she walks in and the camera tracks her. The goal is to make the BG rotate behind her as she continues to walk in normally (the BG will settle when she stops walking), to indicate impending difficulty. Pretty normal.
As I work on the shot, I expect to refine the roto (a lot) as I experiment with the effects on the BG.
My issue is I only want to have one instance of the track that gets referenced in the effect. So, here’s the logic problem:
In After Effects, I assume I need one layer with just the actor and rotoed out and a second layer with just the background rotating (one layer is a normal matte, second layer is inverted).
It seems that I should precomp the Mocha layer and reference it twice, but each reference is to the same track, right? So, I’m confused how to only have one track using Mocha but keep them separate so I can have the effects on one layer, the actor rotoed out on the other layer but only have one track from Mocha (that I can keep refining independently of the effects I’m apply on the AE layer).
Ugh, I don’t think I’ve described this very well. I can do screen shots if that helps.
Or maybe someone can go, Oh, yeah, I know what you’re trying to do! (I hope.)