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Old 06-14-2013, 06:10 AM   #1
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Ambient Occulsion pass + Brick texture pass

I have rendered an ambient occulsion pass in Maya 2011 of the screenshot attached. I would like to composite another pass of just the brick walls in the camera view. Is there a way I can render a pass with just the brick visible, and all other components in the scene as an alpha channel so that I can composite it in photoshop?
Thanks in advance!!
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File Type: png Screen Shot 2013-06-13 at 11.03.32 PM.png (83.9 KB, 10 views)
 
Old 06-14-2013, 11:51 AM   #2
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If you are using mental ray, an easy way of doing it is to add those break walls into a contribution pass. This way when it is rendered, it is cut out by it's alpha and you may simply add it to your composite.
 
Old 06-14-2013, 06:11 PM   #3
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Quote:
Originally Posted by SuperHero
If you are using mental ray, an easy way of doing it is to add those break walls into a contribution pass. This way when it is rendered, it is cut out by it's alpha and you may simply add it to your composite.


Thanks Superhero! I was actually reading about this last night wondering if this was the answer. I don't have much experience with the a contribution pass. Any good tutorials you could suggest?
thanks again!
 
Old 06-14-2013, 06:51 PM   #4
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It is in fact really easy creating contribution pass. In your render layer(which contains all the objects), simply select those break walls and right click on the render layer, add them to contribution pass. Preferably render in exr format so you can have both your rendered image and this pass in one place.
 
Old 06-14-2013, 06:51 PM   #5
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