If the mask work is not too complicated to quickly do again in mocha, then you could do all the masks with linked masks there, and via the Mocha plugin get the animated mask paths to copy to the masks on the original layers?
but 2 antialiased edges right next to eachother will still not get you a 100% tight edge, 50% alpha + 50% alpha does not equal 100% alpha. But then you maybe could use the Add Alpha blendmodes to get better merge of the masks.
This is a case where it actually would be useful to have the option to render masks an un-anti-aliased (guess that is called aliased :-P) to get 100% pixel perfect merge of mask alphas.
I dont know if it can be used for your case, but maybe a bit of rethinking of the setup and you could do the keying on 1 layer but using the masks as Effect Masks instead?
Robert
Thx Mike, Having a stencil from them for my RGB doesn’t solve my Alpha channel problem.
Let me explain it in another way:
I am creating different mattes with semi transparent areas in the overlapping and that causes a problem because the create multiplication of the alpha information
The ideal way to fix this is if the mask could be perfectly adjacent to one another the same way a mask on “add” and its duplicate on “subtract” work. Only that I have more than 2 masks.
Could you add a further copy of the original footage on top of all your keyed layers and enable ' preserve underlying transparency' ?
