-
3D tracking matte
Hi, Ive run into a small problem here and I am not really sure there is a solution but I thought maybe you guys could help me. The situation is as follows:
I have 2 layers in 3d space, lets call them A and B. A is constantly orbiting B. Now B is just a simple solid and should only act as a mask, so whenever A moves in front of it, A should be visible, but hidden everytime A moves behind it. Now comes the problem: I dont want B itself to be visible, since its hiding other layers in the background. I cant really rearrange the layers the way I would want because of other 2D layers getting in the way and I would want those to stay 2D if its possible. Setting B as an alpha, or inverted alpha mask simply ignores the 3D space and just hides (or shows) A, regardless of the Z position
So heres the question: Is there a way to make tracking mask work correctly in 3D space or a way to “hide” the B layer to the main view and make it only act as something that hides the layers behind it in Z space?
-
2 Replies
-
Okay I seem to get what I want if I precomp both layers and set layer B to Silhouette Alpha, since this seems to work in 3D space and hierarchy. But I would like to do this without precomping due to parenting, etc…
-
What if you made B a very bright color, and then Chroma Keyed it out? Then A would occlude it when in front, and be hidden by it when behind. Precompose it and place over your background, apply the key to the precomp, and you’d be done.
Reply to this Discussion! Login or Sign Up