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Isolate, opacity using a mask

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Adam Roestenburg
Isolate, opacity using a mask
on Feb 3, 2010 at 6:31:12 am

Hi there,

I have 3 layers. A topo layaer, an alpha layer of the orange blob and the color pass of the blob.

I am trying to localize opacity changes to the topo layer so the orange blob shows through the surface slightly so it seems underground.

I rendered an aplha layer of the blob , hoping to be able to figure out the ensuing puzzle.

any ideas

It may seem a bit noob, but I'ma a semi-noob noob.



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Michael Szalapski
Re: Isolate, opacity using a mask
on Feb 3, 2010 at 6:43:03 am

Is there a reason you can't put masks on the topo layer and have the orange blob below that?

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Adam Roestenburg
Re: Isolate, opacity using a mask
on Feb 4, 2010 at 3:08:48 am

yeah thats what I'm trying,

but I need the mask to be the same shape as the blob, eg use the alpha pass as a mask?


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Ben Heusner Brownlee
Re: Isolate, opacity using a mask
on Feb 4, 2010 at 6:55:19 am

Why not use the alpha either as a Track Matte or Channel > Set Matte on your blob layer?

Cheers,
Ben

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Adam Roestenburg
Re: Isolate, opacity using a mask
on Feb 4, 2010 at 8:51:37 am

Cheers,

I've played with track mattes before, just took some "jiggery pokery" as my employer says when ever I mention technicalities.

ta for the input.

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