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Now, that you have used Roto Brush to create yourself a nice matte for your shot, what you are going to do with it? Well, there is a few obvious things. One is background replacement. Say you wanted to set him in different room. You need to do two things. One, you need to do something such as Roto Brush to separate this foreground from your background. And two, you'll need to track that background shot and apply that same tracking to your new background, so that it has the same motion as the old background and all the parallax and perspective works. That's with some traditional rotoscoping type of application.
But additionally, you can get very creative. Once you have separated the foreground from the background, you can do things with it. In this case, I have my separated foreground. I have done a little bit of color correction on him to make him a little bit yellow skinned than red skinned. I've taken a duplication of my Roto Brush layer and I've added the layer style Outer Glow to it, so that he's got a nice, glow coming from around him. I've taken another copy of the background and just turned it into a black-and-white image and played with its levels a little bit, to go ahead and put a colored version of him over a black-and-white background.
Now, we are all familiar with movies and commercials where, say, the actors are in color or blank-and-white while the background is different. You need to put a magical glow around someone. This is all good stuff that you can use Roto Brush for. But you can also think of Roto Brush as being much more specialized and much more localized in what you do. Let me turn these other guys off for now. I am going to turn off these black-and-white effects. Let's say that our director says you know, "he looks just a little too old." "He has a few too many of wrinkles on his face, particularly around the eyes." "Could you go in and just smooth out his skin a little bit?" Normally, this would require a lot of hand masking to create what some people called power windows, based on some color correction suits, to create a mask just for his face, but that's a perfect example of using Roto Brush.
Let's center him up here. I'll select my Roto Brush tool and just go ahead and start creating Roto Brush mattes for his face very quickly here. And maybe I do want to pick his hair around his ear. And a little bit more into this area. A pretty quick Roto Brush matte and it automatically tracks from frame to frame. Once I have that, I'll turn off my propagation boundary, I can apply other effects. Now, we've got a few different Blur tools.
In addition to normal Fast Blur, etcetera, we have do have things like Smart Blur that keeps the sharp area sharp and blurs just the wrinkly areas like his face. Again, I probably want to back off away from that level. It's a little bit around that direction. And I'd finish of this composite by feathering the edge and enabling Refine Matte. So, you can use Roto Brush to create these really quick mattes to go ahead and selectively alter parts of the image. Of course, the other thing you can do is just use it to create silhouettes. Another fun effect you see is in some commercials, movies, etcetera is just have silhouettes of people moving in the background.
Well, rather than having a hand mask real footage or try to animate masks to make them look like people, choose some footage, quickly do a Roto Brush on them, create a black-and-white image, generous feathers, smooth edges. You have got a nice silhouette. So don't think of Roto Brush just as "I hated root in the first place." "Why do I want a tool to do more roto?" Think of it as, "all of these tasks where I just wished I could get a quick matte, now I can do them and now I can just take these ideas and run with them."
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