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I render a scene in Multilayer EXR sequence (Cycles). After I've combined the passes together everything is OK, but there the foam is missing. I've checked all the passes, and I don't see pass with foam.

Combined pass:

enter image description here

Composite:

enter image description here

Math: ((DiffuseDir + DiffuseInd) * DiffuseCol) + ((GlossDir + GlossInd) * GlossCol) + ((TransDir + TransInd) * TransCol)

Ocean shader:

enter image description here

How can I get the foam for final composite?

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    $\begingroup$ How did you create the foam? If you used an emission shader, it would be in the emit pass (for example). $\endgroup$ – JtheNinja May 11 '15 at 17:38
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    $\begingroup$ @JtheNinja I'm not sure in what pass must be foam. I check the foam, in the ocean modifer settings, so I created a layer of foam. Then I used this layer using a node "attribute", while working with the ocean shader. $\endgroup$ – Rumata May 11 '15 at 19:18
  • $\begingroup$ @MaximVelichkin What shader(s) did you plug the attribute node into? $\endgroup$ – gandalf3 May 11 '15 at 19:23
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    $\begingroup$ How about creating a material for the foam only, instead of integrating it with the water and creating a single complex material (Maybe even use the foam attribute to make a material that is all transparent but the foam... to keep the compositing simple). Make a render layer with the water material and everyting else and a second layer with the foam. Take both in Nuke and work your magic. $\endgroup$ – user1853 May 12 '15 at 7:53
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    $\begingroup$ Can you post a reduced blend file with just the ocean mesh? Also, can you remove any unnecessary nodes (There's a whole group top right that is not connected to any shader node, adding extra confusion to the node tree). If you're sure the foam material is on a layer that is contributing to the Combined pass, then it has to do with the Emission or Environment passes which you are currently not combining in your compositing process. $\endgroup$ – Todd McIntosh May 19 '15 at 2:31

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