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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®.
A gizmo is Nukespeak for a macro, a prepackaged group of nodes that have been collapsed into a single node that is then added to the tool tabs like any other Nuke node. But to make a gizmo, you first have to make a group. Here's how to make a group. Let's start by getting our purple face guy from Project Media, Mr. Purple Face, open, type 1 to hook to the viewer node. So we're going to make a group that will apply a series of operations to his face and then turn that group into a gizmo.
So let's pull in some nodes. We'll select the Read node and type T for the transform, G for a grade, B for a blur, and let's say that I want the Gain to always be set at .5. There we go. But I want to export and adjust the Blur node's Size parameter, as well as the Transform node's Scale parameter. So those two controls need to beyond the outside of my group. So first of all, to make a group, we'll select the nodes we want to have as a group, and the keyboard shortcut is Command+G. And they collapse into a group.
Now the first thing you want to do is to rename it, so let's call this MyGizmo. And to view the contents of your group, you have a Group tab over here. If you click on that, you get a Node Graph of all the nodes that make up the group. We'll go back to the regular Node Graph. Next, I want to export my two controls, the Blur Size and the Transform Scale value, so I'll come up here to my Gizmo property panel, right mouse pop-up, and select Manage User Knobs.
Now there are two different things you can do with these user knobs. You can create your own custom sliders and knobs, and then you can hook those into any parameters that you want. Or you can pick existing knobs that are in the nodes you have in your group, which is what we're going to do. So we'll start the Transform node. We'll unfold that. And here's the Transform tab and the Node tab in the Transform node, so we'll unfold the Transform tab and we'll pick the Scale parameter. Say OK, move this over. So here is my scale.
Next, we'll pick from the Blur node, the Blur tab, the Size parameter, and I'm done. I've now got the Scale parameter and the Blur Size parameter exported to the gizmo. I'll set both of these to default by doing a Command+Click on the slider bar. If we stop here, the group will be saved with the Nuke script. Then it will not show up in the tool tabs to be used in other scripts. For the group to become a gizmo, it has to be exported as a gizmo.
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