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I've reset the GridWarp node for the next subject. The GridWarp itself can be edited to add gridlines where you need them and remove gridlines where you don't need them. The entire GridWarp can also be resized to only affect one small part of the image. Let's see how it works. If I want to insert a gridline, I come up to the Insert tool right here. Notice how the grid is turned white. And now I can move in here and wherever I place it, this is going to insert a gridline horizontally.
And since I'm still using the tool, I can move over and add another gridline vertically. And I'm still using the tool, so I could add another one over here. When I'm done, I have to go back to the Selection tool. I can also delete lines. I pick the line Delete tool, come over here, and click on this one to delete it, and that one to delete it, and go back to the Selection tool. To see how we might use that, let's set the GridWarp node back to default.
Let's say I wanted grid control points right on his eyes. Well, these control points are off a little bit. So I'll go to the Gridline Insert, insert a line right here where the eyes are, and then a vertical one right there and another vertical one right here. Then I'll go to the Gridline Remove tool, take away the old ones here, the old one there, and the old one over there, and then go back to the Selection tool and now I've got GridWarps exactly where I need them.
Again, cursor in the viewer, type O to turn off the Overlay. And to see the effect come and go, just disable and enable the GridWarp node itself. I'll re-enable the GridWarp node and restore the overlays. Sometimes you'd like to apply a GridWarp to just one small part of the picture, so to do that, we'll use the Boundary tool. I'm going to reset this back to default and push into the ear here, and here is the Boundary tool. I don't exactly agree with this name, because what this really does is it draws a brand-new local GridWarp, not just a boundary.
Push it a little bit more. So as you can see, the main GridWarp has been replaced by this local GridWarp. And now we can adjust just this part of the picture without affecting any other part. There I've applied a warp to this ear. I'll deselect, I'll turn off the overlay, and I'll toggle with disable on and off for the GridWarp node. So for we've been using a static grid, but there are many times when you'll want to animate the GridWarp, so let's take a look at that next.
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