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Mutiple 3d mattes for a 3d layer?

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Pippo BaudoMutiple 3d mattes for a 3d layer?
by on Dec 29, 2013 at 9:35:17 pm

Hi there,

I'll try to be quick :)

I have 3d tracked a video take and I am compositing 3d content inside of it.

I have a COMP that needs to be "Alpha-inverted"/matted from 2 different layers:

here's a screenshot with details, because I think an image is worth a thousend words :) <--- image

In summary: I need the "ground-circles" animated comp to be "masked"/matted by 2 other ones (the tree and the light pole) in order to give the scene a realistic look.

I understand this can be done with node-based software, but is there any way this could be done in AE?

Thank you very much for your attention



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John CuevasRe: Mutiple 3d mattes for a 3d layer?
by on Dec 29, 2013 at 9:58:56 pm
Last Edited By John Cuevas on Dec 29, 2013 at 9:59:16 pm

Precomp the matte layer, so they are one layer

Johnny Cuevas, Editor

"I have not failed 700 times. I have succeeded in proving that those 700 ways will not work. When I have eliminated the ways that will not work, I will find the way that will work."
---THOMAS EDISON on inventing the light bulb.

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Brendon MurphyRe: Mutiple 3d mattes for a 3d layer?
by on Dec 29, 2013 at 11:03:32 pm

I usually precompose the mattes, and then enable the "collapse transformations" switch so that the 3d placement is preserved in the main comp. Use the precomp as your track matte.


Brendon Murphy

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Giacomo BompanRe: Mutiple 3d mattes for a 3d layer?
by on Dec 30, 2013 at 12:32:26 am

Tx guys for the replies!

I managed to get it sorted, thanks a lot John!

What I was missing is to precomp also the camera AND the null objects and eveything is now working properly :)

brendon, I didn't think of the collpase transformation, it sound very smart, I'll give it a try ;)

Thanks very much guys!!

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