AE CS6 on an HP 820z, Wn 7
This surprises me:
I am moving ahead just one frame and you can see from the timeline that the first image below: Layer "Bonnie full field shot" is above the precomposed layer "Bonnie 3D no lettering." In this first image, the cursor is one frame before the the last layer. And yet when I move the cursor just one frame ahead, with many frames of the upper layer left to go at 100% opacity, I might add, the upper layer "Bonnie full field shot" disappears as if it were "under" the lower one. Is there a way I can make the upper layer maintain it's visual primacy until I fade it?
Now one more frame, even though there is still more of the layer above it, the upper one disappears.
3D layers operate based on ther 3D coordinates, not layer stacking order. If you want a layer to appear behind another, you have to actualyl move it behind.
You can cheat this sometimes by sticking an adjustment layer right under the layer you want to be shown, regardless of its 3d position.
Thank you, thank you for all your thoughtful comments. Both layers were 3D and I found a thread somewhere that mentioned that in 3D space, layers may act differently because of their "order" in 3D space. I adjusted the upper layer back on the z plane one pixel and it fixed the problem. A very useful heuristic that goes beyond my question is found here: