From the course: Nuke Essential Training (2014)

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Compositing multipass CGI

Compositing multipass CGI - Nuke Tutorial

From the course: Nuke Essential Training (2014)

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Compositing multipass CGI

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Now that we have a firm grasp of both Nuke channels and the merge node, we can work them together to see how a multi-pass CG element, with several lighting passes would be composited. We'll be using our familiar multi-pass head, and recall, that it has a reflection pass, a specular pass, and of course the diffuse pass is in the RGBA layer. We also have a masks layer. And in here, I have a grunge pass. This puts noise and dirt on the picture. The ambient occlusion, and these are all one channel images. And here, I have the shadow pass again. One channel images. All right, so let's put all of this together. We'll start by selecting our read node and I'm going to add a merge node by using the keyboard shortcut, so I'll type M on the keyboard. And as you know now, the merge node hooks the A side up to whatever node is currently selected. So I need to take the diffuse lighting pass, which is in the RGBA layer, and add it to the reflection pass. Now, the RGBA layer with the diffuse is right…

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