From the course: Nuke New Features Consolidated

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Keylight: Holdout mattes and garbage mattes

Keylight: Holdout mattes and garbage mattes - Nuke Tutorial

From the course: Nuke New Features Consolidated

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Keylight: Holdout mattes and garbage mattes

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- [Instructor] Let's see how Keylight handles holdout mattes and garbage mattes. We'll set the green screen down here and the background over there so we can see our connection a little better. For a holdout matte, we use the inside mask. I've prepared something right here to give you an idea of what it looks like. I'll hook the viewer up to it, okay, alright. Let's go back to Keylight. Now let's pull the key, quick and dirty, and I'll turn off the eyedropper, clear the box, and we'll take a look at the screen that I have. Okay, I have some serious transparency problems here that I want to cure with a holdout matte. So I've connected the in mask to use as the holdout matte. I'll go up to the view and say show me the inside mask. Nothing. The reason is I have to first tell Keylight which component of the input mask to use and the default is none so I'm using no component from the input mask. If I say alpha, it's going to use the alpha channel. I could say alpha inverted or I could…

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