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Author Steve Wright explores the new features found in the 3D digital compositor Nuke 6. The course introduces the RotoPaint node for drawing and painting effects, the Keylight keyer for creating mattes and composites, and the SplineWarp node for warping images. The course also explains how to merge keys, animate with keyframes, and create image-based blurs. Exercise files accompany the course.
Nuke 6 New Features was created and produced by Steve Wright. We are honored to host his material in the lynda.com Online Training Library®.
Let's see how Keylight handles holdout mattes and garbage mattes. We will set the green screen down here and the background over there, so we can see our connections a little better. For a holdout matte, we use the Inside Mask. I have prepared something right here. To give you an idea what it looks like, I will hook the Viewer up to it, okay, all right. Let's go back to Keylight. Now let's pull the key, quick and dirty, and I will turn off the Eyedropper, clear the box and we will take a look at the Screen Matte I have.
Okay, I have some serious transparency problems here that I want to cure with a holdout matte. So I have connected the In Mask to use as the holdout matte. I will 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 it None. So I am using no component on the Input Mask. If I say Alpha, it's going to use the alpha channel.
I could say Alpha Inverted, or I could choose the Luminance of the Input Mask or the Inverted Luminance, but we will stick with Alpha. So this is the Screen Matte, which is the key created by Keylight and now if I say show me the Combined Matte, I am going to see the screen the Screen Matte and Inside Mask together. Now let's take a look at a garbage matte. We use the Outside Mask, or the OutMask to do a garbage matte. Hook that up here. I will hook the viewer directly up to my OutMask so you can see what I have drawn here.
Put the viewer back to Keylight and we will go up to the View and once again say now show me the Outside Mask and again nothing, and for the same reason, I have to set the Outside Mask component first. So I am going to select Alpha. Now Keylight wants white in the garbage matte area, so I need to really select Inverted Alpha. Now the Combined Matte is going to show me the Screen Matte plus the Inside plus the Outside Mask altogether in one combined matte.
And now we will go to the Screen Gain and simply dial in for a nice clean matte and switch the View to Composite.
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