Reflection Alpha passes

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  06 June 2013
Reflection Alpha passes

Greetings CG Society,

I have a quick question, at the moment I am working on a project with VRay and Nuke attempting to figure out how to change colors and redo lighting in post. Those steps are easy and I have successfully gotten all the appropriate passes working, however I can't seem to render out an alpha for reflections. As an example I have rendered a red reflective sphere with some GI lighting, getting some nice bounce light on the floor and all the fine detail needed. In nuke I used the alpha and some other passes to change the sphere to a nice blue color, kinda basic previs type work. Unfortunately the reflection on the ground stayed red. I have followed a couple different tutorials and scoured every check box in VRay to see if i could find a solution. No such luck. The best tutorial I found was for an older version of Max ( but its exactly what we need to do. I hope that someone here on CG has a solution for me :/.

Maya 2013
VRay 2.0 for Maya
Nuke v7.08
  06 June 2013
You don't really need an alpha for a reflection. All you have to do is plus it onto the other passes.
  06 June 2013
Adding the reflections isn't an issue, it's gaining the unique control to change the color of everything together.
  06 June 2013
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