i am trying to figure out a way to be able to show just one layer from a pre-composed comp. for example lets say there are 5 different hand pictures (with alphas) in a precomp, i seek a method to change the hand picture from pic 3 to pic 5 without entering the pre-comp, changing opacities constantly.
One way is to set up (within the pre-comp) the opacity to and from, then in the main comp, adjust the time remapping. For instance, in the pre-comp, frame 1 is photo 1; frame 2, photo 2, etc. Then in the main comp, with time remapping applied, just call on the associated keyframe desired.