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Moving image with alpha from one window in photoshop to another

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mYthprod
Moving image with alpha from one window in photoshop to another
on Mar 24, 2006 at 8:24:51 pm

I've rendered out a cloud I've made in Maya to the iff format with alpha. It comes into Photoshop with an alpha "channel" but the background is black. How do I drag this cloud layer to another photoshop comp and have just the cloud show up with nothing behind it? I can go into the channels tab, cntrl-click on the alpha channel and then copy and paste into new photoshop comp, but there's black where it's pre-multiplied. I'm trying to fix it so only the cloud shows up and no blackness. I tried rendering with premultiply checked off in maya but my alpha goes away when I do that. If it has to be premultiplied to do what I want, how do I tell maya to premultiply against blue instead of black? Or do I do that step in photoshop?

Confused.



- mYthprod
(John David Hutton)

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isotrope
Re: Moving image with alpha from one window in photoshop to another
on Mar 24, 2006 at 8:46:30 pm

Hi John,
this may not be the best solution, but have you tried either "choking the selection" or having the Clouds layer blend mode set to "Screen"?
As for dragging it, you could make the Cloud into a Layer if it's a Background, then use the ctrl-click method to get your selection, then apply a Layer Mask on your Layer, then drag that Layer into your composite.
I hope some of this can help.
Cheers,
iso


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Richard Harrington
Re: Moving image with alpha from one window in photoshop to another
on Mar 26, 2006 at 3:07:41 am

CMD Click on channel icon to laod a selection

Switch to layers and double click backgroudn to make it a layer

then click add layer mask button


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