Join Steve Wright for an in-depth discussion in this video Exploring the new Primatte 5 features, part of Nuke 7 New Features.
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Primatte 5 introduces four powerful new tools that speed up the keying process and improve results by providing new tools to solve old problems. Let's check this out. We'll start over here with the Auto-Compute; by the way, all these images are in the Tutorial assets folder. We'll open up our Primatte Node and the first feature we'll look at is the Auto-Compute. This is a brand-new algorithm that is very effective; you can get a great key very quickly.
First, I'm going to increase the size of our Viewer area so that we can see more pictures. Here we go! Then click the Auto-Compute button and there's our Alpha Channel. Wow! It automatically selects the background color and does a cleanup on the foreground and the background. Note that the Operation has already been set up for Clean Foreground Noise, so it's done all three of these for you automatically. You can now move directly to Keying Refinements and Spill Suppression. We're back to RGB, let's take a look at the new smart select background color feature, hook this up, open up the New Primatte.
This new feature is actually the first operation in the Operation stack. To show you how effective this is, I'm actually going to use the original Simple Select BG Color operation and compare. So we'll select that, come up to our picture, select a region of green screen pixels to set the background color, and then we'll look at the alpha channel, look at that, all the transparency. Now, I'm going to now switch to the Smart Select BG Color tool and I'm going to carefully select exactly the same area, bang, look at that, the foreground is much more solid.
That's because the new Smart Select Background Color algorithm actually uses a histogram analysis for separating the foreground from the background and it also performs a little clean foreground noise operation internally. In fact, all I have to do now is set the Clean Background Noise, couple of strokes here and there, and we're ready to go to launch. Next up; the new Adjust Lighting feature. This is very cool! How many difficult keys have you tried to solve because the backing region is unevenly lit? Here we have hotspots over here on the site and darker spots over here.
Well, the Adjust Lighting feature actually corrects the green screen backing to give it a much more uniform lighting. Let's see how that works. First, we'll select Auto-Compute and then we'll turn on the Adjust Lighting and now let's switch to the Alpha Channel to take a look. I'm going to toggle the Adjust Lighting on and off and you can see where it's actually cleared out a lot of the haze in the background. The thing I love about this is it doesn't disturb the edges of your key, there's no degradation, there's no dilatory erode, beautiful, re-home that, go back to RGB.
Now along with the Adjust Lighting feature there's two new Output Mode options. First the Adjust Lighting Foreground, this shows you the green screen after it's been affected. In fact, watch what happens when I toggle Adjust Lighting on and off, okay, this is the original; this is the corrected, original, corrected. Now there is another feature in the output, the Adjust Lighting Background. What this is doing is it actually building a clean plate, and it's using that clean plate in order to help pull the key.
This allows you to dial in the clean plate if you whish. We can open up Adjust Lighting, the Threshold Slider as you move it to the right, brings more of the foreground into the clean plate. The Adjust Lighting algorithm actually divides the picture up into a grid, so if we increase the grid size, we get more fine detail in the grid, okay, so we'll put those back to default, close that up and return to our lovely composite. Next is my personal new favorite the New Hybrid Matte feature.
Let's open up that Primatte, close this, look up the Viewer, check this out. The Hybrid Matte feature actually creates a core matte inside of the Primatte Node, you may never have to use additional keyers again to create your composites, now that you could do it all in Primatte. First, we'll select the Auto-Compute, we'll go to the Alpha Channel and we can see we have all this transparency in here. The Hybrid Matte feature is especially useful when the foreground colors are similar to the backing color, like somebody shoots blue jeans on a blue screen, like who would ever do that, right? Watch what happens as I toggle the Hybrid Render feature on and off, you see, it's adding in the core matte that's created internally in Primatte.
Now we can see this core matte, come down to the Output Mode, pop-up Hybrid Core, there's your core matte and now we can adjust that Hybrid Matte, you can dial in the erode or adjust the blur radius, I'll put those back to default. You can also see the Hybrid Edge. What this really is is your original key. So hybrid edge will show you the original key, hybrid core will show you the core matte, and then go back to composite, you'll see the two together.
And you can actually just toggle that node on and off to see the effect of it, outstanding! Primatte 5's powerful new tools and smarter algorithms promise faster and higher quality keys with less cleanup work, and the awesome new hybrid render feature, virtually eliminates the need to use multiple keying nodes to create your core mattes.
This course was created and produced by Steve Wright. We are honored to host this content in our library.
- Working with stereo in the RotoPaint node
- Keyframe tracking
- Exploring Primatte Keyer
- Setting up and using Motion Blur
- Adding depth of field with ZDefocus
- Animating warps and morphs
- Measuring and viewing deep data
- Retiming a shot with optical flow
- Tracking and point generation in the PointCloudGenerator
- Creating separate cameras and points with the Camera Tracker
- Setting up displacements
- Modeling more complex geometry with the ModelBuilder node
- Casting semitransparent shadows
- Relighting renders