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So let's get started by adding some nodes to the Node Graph,
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and where do we find these nodes?
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Well, the first place is this toolbar on the left,
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each one of these buttons is a category,
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and if we click on the category, a list of nodes that are available will pop up,
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and I can just select the node that I need,
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and it will add it to the Node Graph down here.
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Now I'm going to delete that, and with the Node Graph selected,
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I'm going to hit the Tab button,
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and a list of all available nodes inside NUKE will pop up here,
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and I can just type the name of the node that I want,
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and select it, and it will drop a node down here too.
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I'm going to delete that one,
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and a third place you can find these nodes is by just
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right-clicking down here in the Node Graph.
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All of these categories are the same categories
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that you see in the toolbar panel, but they're just written out for you.
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So I can go to Filter, and I can select the Blur node again,
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and it will drop the Blur node down here into the Node Graph.
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Now one of the nice things that NUKE does for us is if
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we're down here in the Node Graph, and we hit the Tab button,
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it will auto-populate with the last node we dropped down into our comp,
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in this case, a Blur node.
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And if I just hit Return on the keyboard,
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it will add one of those nodes to the comp,
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and if I hit Tab again, and hit Return again,
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it will add a third Blur node to the comp.
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Now something to note here is that it did not connect the Blur1 to the Blur2,
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but it did connect the Blur3 to the Blur2.
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So, if we have nothing selected down here in our Node Graph,
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and I hit the Tab button, and I drop a node in here,
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it will come into the Node Graph unconnected to anything.
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But, if I have a node selected and I hit the Tab button,
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and I add a node to the graph, it will automatically connect the node for us.
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Another thing to take into consideration when you're working with the
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nodes is if you have one of these nodes selected and you right-click
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to bring up the menu of all of the nodes,
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and you select a node, like a ColorCorrect node here,
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it will drop the new node in your comp tree right
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after the node that you had selected.
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So let's say I want to put a Grade node in between
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this ColorCorrect and this Blur.
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I would select the ColorCorrect node by left-mouse button clicking,
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and then right-mouse button clicking,
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and then I would find the Grade node in the Color Menu,
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and it would drop it in right after the node that I had selected.
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Now let's go ahead and delete all these nodes,
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I'm going to left-mouse button click and just
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marquee drag around everything here, and then I'm going to hit the Delete button.
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Now I deleted that viewer on purpose,
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because that's something that happens to beginners a lot,
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and you'll notice that the Viewer went away up here in the Viewer panel,
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and that's not a big deal, all we have to do is go back down into the Node Graph,
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select it, and hit one on our keyboard, and it'll bring our Viewer back.
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Now let's start working with our first image.
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To bring an image into NUKE, you need to use a Read node.
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So with the Node Graph selected, I'm going to hit the Tab button,
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and the Read node pops up here at the top because
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it knows we use that node a lot.
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So I'm going to click on it, and it brings me to a file browser.
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Now I'm just going to select the image that I want to use,
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in this case, the CGEarth.
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jpg image, click the Open button,
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and it will drop a Read node with that file associated down into our Node Graph.
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And you're thinking to yourself, well, where is the graphic?
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Where is the image that we just brought in,
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the Viewer's blank,
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and that's because the Viewer node over here isn't connected to this image yet,
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and we can do that just by dragging this arrow over to this
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node and releasing the left-mouse button,
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and it's connecting the Viewer now.
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So, now we see what is in this node up here in the Viewer.
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Another way to do this is I'm just going to disconnect this Viewer by clicking,
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left-mouse button clicking on this arrow,
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and by releasing, which disconnects the Viewer.
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I'm going to select the node that I want to see,
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and hit one on the keyboard,
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and that's going to make the view of that node available up here.
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Now let's perform our first operation with the Blur node.
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So I'm going to go back down here,
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I'm going to left-mouse button click to select my image,
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I'm going to hit the Tab button, and I'm going to type Blur into this box,
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and select Blur from the menu, and it brought a Blur node in,
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and that Blur node is connected to our Read node,
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and it's even connected the Viewer to our Blur node.
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So,
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what we're seeing up in the Viewer panel right now is
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actually the Blur and its effect on our image,
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but you're saying to yourself, it's not blurry.
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Well that's because the property of this Blur node by default is set to 0.
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You'll see the 0 over here in the Properties panel,
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and if I just take the slider, and raise that value up high,
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you'll notice that the image gets quite blurry,
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and that's exactly what we're looking for.
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Congratulations, you've put together your first comp tree.
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