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Playdo
Joined: 02 Mar 2011
Posts: 2
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 Posted: Wed Mar 02, 2011 3:58 pm Post subject: Blend mode - removing halo around edge of alpha?? |
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This is a complicated question so I'm hoping there are some real 'Gurus' here.
I have a final image of my image to which I want to apply an alpha as a mask of an adjustment layer.
The image and the alpha have come out of 3ds Max. The problem is that there is a halo around the edge of the mask. This is caused due to transparency at the border of the alpha. I don't know how to get around this.
I was told that there may be a way to do it by dividing the alpha. I see that Photoshop CS5 has a divide blend mode. I don't have CS5. Does anyone know if this solves this issue? Or any other solutions
I've attached the render passes that I'm working with and below is an image of the problem once the alpha is applied and the hue/saturation is altered.
http://www.fileswap.com/dl/LQmX9s/Passes.zip.html
http://s919.photobucket.com/albums/ad34/elaihphotography/?action=view¤t=Example-CloseupObjectIDHalo.jpg |
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thehermit
Joined: 05 Mar 2003
Posts: 3987
Location: Cheltenham, UK
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| Posted: Wed Mar 02, 2011 4:11 pm Post subject: |
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Use the defringe facility or contract your selection. Layer>Matting>Defringe in case you were wondering.
_________________
If life serves you lemons, make lemonade! |
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Playdo
Joined: 02 Mar 2011
Posts: 2
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| Posted: Wed Mar 02, 2011 5:12 pm Post subject: |
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No. That's not going to work for this. A contraction of 1 pixel is too much and defringing won't fix it. Attempt it on the attached files to see for yourself if you like. |
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