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In this clip, we're going to take a look at despill with the huecorrect tool.
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The huecorrect offers a great alternative or serves as an
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addition to other despill tools and workflows.
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It can help select an isolated set of color values
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and suppress them or saturate them.
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So let's take a look at our script.
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So here's a script, and before we get into huecorrect,
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let's take a look at how it works with opposites on the color wheel.
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So here I have my image, and I'm going to do a box over here and add a gray tool.
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And in the gray tool I'm going to go under the gamma,
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and I'm going to select this little color wheel,
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so that's going to be control, alt, and left mouse button click,
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it brings up this great little pop-up.
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Now on the color wheel, here is our green,
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and opposite of the color wheel is magenta.
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Any colors that are opposite on the color wheel cancel each other.
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Now this, keep in mind, is not 100% green,
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as we know, so it won't be exactly 100% in the magenta over here,
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it will be just opposite of whatever this color is.
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So we take a look at that.
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It's going to turn it so that it's a brownish color.
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So it does start to remove some of that green.
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Now let's take a look at what that looks like in a blue screen example.
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So we know that the magenta will cancel out the green.
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So what about the blue?
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So here is our blue screen image,
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and we're going to also go into the color wheel of the gray tool,
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so here we're going to go, so in the gamma,
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and click, and opposite of the blue is going to be yellow.
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So that's also going to cancel out the blue.
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So let's take a look at that.
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Here we go.
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And it also turns it a brownish color.
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So opposites on the color wheel do cancel each other out,
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and we're going to take a look at one last thing.
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So control, alt, click one more time, and that is TMI.
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TMI stands for temperature, magenta, and intensity.
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Here we have cool and warm, magenta and green.
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So it's a really great way to suppress a color or at least to cancel it.
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And another thing to keep in mind is what they do on set.
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So sometimes what they do on set is if they're working on a green screen,
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that they use magenta gels on the light,
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and that's to cancel out some of the spill.
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And of course on blue screen, you would consider yellow.
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Now, that isn't necessarily always the case,
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but it is an alternative if you're having any issues.
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So now that we have the basics of how to cancel out a color,
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let's take a look at the huecorrect.
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So over back to our script, and back to our blue screen image,
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and we're going to use a default huecorrect tool.
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So in the huecorrect tool, we are going to sample the bluescreen,
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so control, shift, drag, and select blue suppression.
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Now where this horizontal line meets the vertical one,
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that's where our color is that we sampled,
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so let's take a look at that tool right now,
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and we're going to pull it down,
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and you can see that it starts to get rid of the blue screen,
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which is really great, however, same issue that we had before,
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this fussy little edge in here is not addressed.
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Now if we start to pull this wider, it starts to affect our other colors.
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So here we'll put really, really wide.
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Not doing a huge change, however, if we pull these narrower,
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look what happens, we start to really crunch those colors,
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and it starts to artifact quite badly, actually.
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So we don't want to make this too narrow,
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just like we don't want to make it too wide.
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Too narrow means too narrow of a range,
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too wide means we start to affect other colors.
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And the other thing to keep in mind is also we don't want to put this too low,
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so keep it within reason.
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Try to keep it within this initial grid if possible.
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So now let's take a look at what that looks like with an expression.
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So here's our expression, not much different than the huecorrect,
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slight modification, and we're going to take a huecorrect tool,
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but this time we're going to sample where this fussy spill is.
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So control, shift, drag, again, keep in mind where this is overlapping here,
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so instead, I'm going to actually go into the blue and select where they overlap,
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and match the two of them together.
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Now if I take a look at this and I increase the blue, I am saturating it.
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To cancel the blue, pull it down, and it's starting to look pretty good actually,
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overall.
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Now if I pull it down too far, then I start to ruin my image.
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So don't pull it too far, let's just dial that back.
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So where was it before?
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It was here.
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And here it is again.
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So not 100% perfect, it definitely needs a little bit more massaging,
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we'll take a look at that in the new clips following this one,
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but it's already looking a lot better than it was before.
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We're not changing too much of this image,
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which is great as well, just ever so slightly to get rid of some of that blue,
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and again, we'll refine it with a couple of extra steps,
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just to get these final last edges.
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So now that we have reviewed the blue screen,
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let's take a look at what it looks like with a green screen.
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So one more time, so here's our green screen.
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We have done a huecorrect, so let's just huecorrect this here,
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and despill the green screen, so close to our character,
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select that green, pull down that green.
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So let's take a look what that looks like here.
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Despill, that's the brown that we're looking for,
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close to her hair, however, let's see what happens if we pull this too far.
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So again,
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similar to that expression node in the last clip where
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it starts to change our character, let's take a look at this,
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so this is what we were talking about with pushing this tool too far.
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So we've pushed it way too far, it starts to change her skin tones.
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Only push color correction as far as you need to,
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especially with despill,
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so that we retain as much of the original color as possible.
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So one more step, so let's take a look at that expression,
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little bit of a huecorrect, ever so slight,
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mostly affecting these edges on the side here.
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So here is it before, take a look at it between here and here,
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and after, and again just enough to really fine tune it for final output.
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So now that we have reviewed how to use the huecorrect,
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in addition to our expression node,
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we're going to take a look at how to use the spill matte
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to take this despill through to final.
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