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Some artificial edge appearing around a true-alphaed layer in compositing

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Mostafa Talebi
Some artificial edge appearing around a true-alphaed layer in compositing
on Sep 21, 2011 at 6:25:59 pm

hello

I have made these simple renders in autodesk Maya 2012 (Mental Ray)and saved them in png format. all the alpha and masking rules are observed during the compositing phase, and everything looks fine BUT!!!!! there is (as marked) a black edge around the spheres. WHY?
also there is no blurring applied to layer's alpha.

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THANKS


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ben g unguren
Re: Some artificial edge appearing around a true-alphaed layer in compositing
on Sep 21, 2011 at 6:30:49 pm

Sounds like you need to change the alpha type from straight to premultiplied, or vice versa....

Ben Unguren
Motion Graphics & Editing
http://www.mostlydocumentary.com


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Mostafa Talebi
Re: Some artificial edge appearing around a true-alphaed layer in compositing
on Sep 21, 2011 at 6:38:42 pm

thank you much.........

the name is too familiar, where I can set the setting for premultiplied alpha?


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ben g unguren
Re: Some artificial edge appearing around a true-alphaed layer in compositing
on Sep 21, 2011 at 10:38:06 pm

Select your footage in the project window, right click, choose "Interpret Footage-->Main..." (hotkey cmd+opt+G) then change your alpha type and see if it fixes it.

Ben Unguren
Motion Graphics & Editing
http://www.mostlydocumentary.com


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