No, I’m not using any proxies or pre-renders. The way the project is set up is: there is the main comp which has 7 pre comps which houses all the animation. There is no key frames on the pre comps just on all the nested layers inside each precomp. Like I said earlier, when double clicking on a given layer, opening it in the layer view, the changes made by alt dragging the new layer onto it, shows up. But when viewing it with all the other layers in the timeline no changes are there just the original layers. The same thing happens when applying different color correction effects. I did a simple test with some arbitrary layers, making a simple animation and alt dragging a layer on it. That updated like it should, but for some reason it’s not working on the actual animation I’m working on.