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Tallon

Object Buffer/Alpha Matte/Object Id

Hello!

 

I have been searching online for a solution to creating an image plane to create an alpha matte. What I would like to do is get all the objects from my scene and have a separate black and white alpha matte for each object. I would like to be able to take the image into photoshop/after effects and be able to manipulate all the objects in my scene separately.

 

I have followed the video below but this becomes quite the process once I have many objects in my scene. 

Ideally what I want is when I make an animation sequence that either the exr has layers with all the alpha mask or when I hit render it renders both my image and the alpha's as separate sequences. 

 

I also tried using this technique 

http://houdinitricks.com/matte-objects-houdini/

but when I activate the matte option it still renders the rest of my scene normally with only my object appearing in black. I just want a black and white alpha matte. 

   

 

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