From the course: Compositing a Sci-Fi Force Field in NUKE

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Creating the room flash mask

Creating the room flash mask - Nuke Tutorial

From the course: Compositing a Sci-Fi Force Field in NUKE

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Creating the room flash mask

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- Now that we have a mask for the character, we now need a mask for the room so when we flash our lights, we can mask it off to the areas we want. Gonna simply use a roto node in a variety of shapes, but the key is the shapes will also have gradients to them and they'll be different densities so we get more flash in one area than another based on, sort of, a guess as to how the room lighting might be bouncing around. So let's start by pushing in here and let's add a roto node; hook that in here. And let's label this: room flash masks. And I'm gonna float this so that we can see whats going on while we watch our picture. I'm gonna start with this top, right panel up here. So we'll select a Cusped Bezier, push in a little bit, draw my shapes, there and maybe tweak it just a little bit. OK and most importantly, we're going to name it top_right_panel and its opacity is 1. So if we go look at the alpha channel. Ah, here's the deal. We have the alpha channel that came in from the background…

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