Understanding Premult and Unpremult in NUKE

Premult and Unpremult in NUKE are nodes that can sometimes be overlooked. This is because the effects of using them or the lack of using them may not seem to be too apparent until you get up close or make drastic changes. In this tutorial, we'll learn just how important they are and why the math behind pre-multiplication fails with a poor color correction workflow.  

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Background image: “Ardhasaig with Clisham, Isle of Lewis” provided by Chris Combe. Download at Flickr

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