Saturation and Luminosity Maps for Compositing
The next step is saturation, and that's actually a lot harder to see. But the background has a lot more saturation in the foreground. And if we want to match those, we would benefit from something like the black and white adjustment layer. But there's no adjustment layer that just shows us the saturation. But we can trick for photo shop into showing us something like that. So that's what we're gonna do. We gonna create something called a saturation map. So I'm gonna click on this down pointing arrow and click on selective color, and it's gonna give us all these sliders that you see here. The first step is to make sure that absolute is selected and we're gonna adjust the Reds actually gonna just every single one But from reds to Magenta as we're going to go to negative 100 with the blacks and same thing for yellows. The same thing for greens, the same thing for science blues agendas. And for whites, neutrals and blacks were gonna do the opposite. We're gonna add 100% on the blacks Now, ...
this takes a really long time, but you only have to do it once we're gonna sort of pause on the step for a moment, I'm gonna show you another one. Once you've created on adjustment layer like this one that you're gonna use consistently, it's a good idea to save it. It's a preset, so you don't do all this work over and over again so you can just click on the fly out menu and select save selective color preset. I've already done that. So under where it says preset, you'll notice that I have a saturation map so you can just simply create the adjustment layer and then select saturation map. So what does the saturation map actually do? Well, it made everything black and white, which is what we wanted. We wanted a visual representation of saturation. Let me show you how how that actually looks. I'm gonna create a hue and saturation adjustment layer. I'm gonna clip it to the layer below it or to the two layers below it. And if I had just a saturation watch, what happens with the model? If I increase the saturation, she gets brighter. If I disable the selective color adjustment layer, you'll see how much saturation she has. If I d saturate that layer. She's completely black, so the absence of saturation creates black. A lot of saturation creates white in that saturation map, so now we can use that sort of like we use the black and white adjustment layer. So if we can make the image look good in black and white is gonna look better in color. So I'm going on a decrease of saturation and sort of try to match the brightness of this image to match the background. So maybe something, something like that. So if I disabled us the left the color adjustment layer, which in reality it's our saturation map, you will see that the image looks a little more realistic. You see that? You see how that saturation just makes her fit more into the background. And obviously it's a whole lot more that we could do to this to this image to make it more realistic. But in this particular example, those are the two things that I wanted Toe wanted to teach you, using a black and white adjustment layer to create a check layer for luminosity so that you can see what the luminous values are and do something very similar with the selective color adjustment layer to create a saturation map,