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Nuke 5 Essential Training was created and produced by Steve Wright. We are honored to host his material in the lynda.com Online Training Library®.
Nuke 5 Essential Training is designed for digital artists already familiar with compositing visual effects using programs like Adobe After Effects or Shake. This course provides a solid foundation in operating Nuke, using the core functions of keying, motion tracking, and color correcting, as well as Nuke’s key strength, 3D compositing. Tour the Nuke user interface, its unique color management system, and overviews of HDR images, masking, keyframe animation, and 2D and 3D motion blur. Exercise files accompany the course.
If your green screen has a very uniform backing color, then you may not need to use the IBK Color node. That's what the Color Pick mode in the IBKGizmo was designed for. Let's take a look. It's designed for a situation like this, where you have a green screen or a blue screen that has a very uniform backing. In the situation, you don't need to use the IBK Color node to create a clean plate. We can plug this plate directly into the IBKGizmo and dial it in. We will put the Gizmo up in the Property Bin.
And first thing we'll do is check the Screen Type and set it for Pick or Color Pick. Now, the color here is going to be the color of the backing screen and we are going to pick that by turning on the Eyedropper. If I try to pick the backing color off the output of the IBKGizmo node, you see Nuke goes insane as it toggles between the black and the green and black and the green. This is another situation where two viewers will help. So, we will come down here to the original green screen, add a viewer, come up to our pane and split it horizontally, and I am going to the move the IBKGizmo to the right.
On the left is the original green screen. Now, I can pick off the original green screen, like this, and the IBKGizmo node does not go insane. Checking the Alpha Channel, I can now cruise around, sampling different areas, looking for the sweet spot. So, let's say I am happy with that. I will go back to the RGB mode. Now, I will set my viewer to look at the finished composite. You're now ready to go into the IBK Gizmo and dial it in for the best look.
In our next video, we're going to take a look at a series of classic workflow tips like how to color correct when you're working with the IBKGizmo and how to transform the background.
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