“Shuffle” usually refers to a feature used to reorder channels. In Nuke, the Shuffle node allows you to control how pixel information is assigned to different channels. The channels include Red (R), Green (G), Blue (B), and Transparency (A)

When you are done rendering your model using maya, it will help you to export many different layers such as ID layer, Shadow layer, Metal layer and so on. Then import them into NUKE and use the shuffle node to separate them for tweaking, which is handy because you don’t need to re-render them, saving a lot of time.

When I adjust the “point” node in nuke, it’s like a light source, when I move it to a different position, the light of the object will be affected.

First, adjust the rgb channel in the “shuffle” and add a mask to show the local color.I’m not too sure about this part, but I’ll do it in the “garage” project and learn how to adjust the local color.