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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®.
You can add holdout and garbage mattes to Keylight as well as crop the green screen. You can play along too by getting these two images out of the Keylight media folder. The Crop feature in Keylight is mainly used when you have a situation like this where the green screen doesn't fill the entire frame. So let's take a look at how it's used. With this selected, we will go to the Keyer tab, add the Keylight mode and it hooks into the Source input and hookup the background input.
Now unfold the Crops menu and here we set the Left, Right, Top and Bottom margins of the crop, the color of the crop and how are we going to do the crop. I will start by setting the Edge Colour to a bright red. That will make it easier to follow. I move the Left slider here to define the left edge of the crop, and the Right slider to move the right edge of the crop and of course we have a Bottom and Top slider. The idea is to set the Edge Colour to match the color of the green screen and we can do that by turning on the Eyedropper and doing the Alt+Command+Click and that of course will flood-fill the colored edges with the same color you pick off the green screen.
You can also open the color picker and dial in any color that you want. So we will close that, and now let's pull a key. We will select the Screen Colour eyedropper, we will do Shift+Alt+Command to drag a color sample box and put that into the screen color. I will turn off the Eyedropper and close the color sample box. At the moment, the method used for the horizontal crop or the X Method is Colour.
Let's switch over to looking at our Screen Matte to see the results. I can choose one of four methods for the horizontal crop right here. The default is Colour. If I do Repeat, that means it's going to take the edge pixels along the crop and just repeat them all the way to the edge of the frame. If I choose Reflect, it draws a line down the edge and does a mirror image. If I choose Wrap, this edge is really been picked up from this corner over here, the whole image was being picked up and copied over here.
Same thing on the other side. You can also set the Y Method for any one of four techniques you want. In the next video, we will take a look at holdout mattes and garbage mattes.
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