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Now I'm not quite sure why, but I've always found this shot mildly amusing. Just a bunch of camels walking in the desert, but I looked at it and I thought it'd be really kind of cool if we could have their silhouettes over top of a graphic. So I've created a graphic underneath this video layer and this also happens to be a perfect shot to pull a Luma Key. So let's stop playback for a second, so I can explain what a Luma Key is. If you go to the Library tab, under the Filters section, under Keying, when we select Luma Key, in Motion it's defined by saying Pulls a key based on luminance.
Well, if you don't know what luminance is, that's not a big help. But basically, if you remember from our definitions section, luminance is the brightness of the image and we'll use a Luma Key to key out the brightest parts of this image, which just happened to be the sky and we'll keep the darker parts of the image, the camels and parts of the ground. So let's get started. To apply the Luma Key, just drag it and drop it right on to the canvas. You'll notice the graphic is already starting to appear.
But to make adjustments, let's go to the Inspector under the Filters tab and let's adjust our Luma Key. So the key mode, by default, is Key Out Brighter. Since that's what I wanted to do, that will work beautifully. Under Luminance, we'll leave it for NTSC because that's what this footage is. Let's adjust the Threshold a little bit to darken up this shot. We can also adjust the Tolerance if we bring that down. You can see we can get a little bit more tolerance in the image. Now I can tell this isn't really going to work, so let's turn off the Luma Key for right now and let's intensify the contrast of this image.
If you go up to Add Filter > Color Correction and choose Contrast, now we'll crank this up and let's drag the Luma Key on top of the Contrast to make sure we have the proper filter order. Now let's turn the Luma Key back on and see what we've got. It's getting a little bit closer. Let's adjust the pivot point. There we go. Let's press Play and check out our graphic. It's getting there, but this is still a little bit noisy.
Let's adjust the Contrast a little bit more. Make sure to click directly in the number value slider, so you can drag to a higher value than this actual slider to the left. Now let's go ahead and press Play and, I think, this is a little bit more along the lines, just to what I was looking for. Now as you can see if you just think a little bit outside the box, you can create some pretty interesting graphics, all using the Luma Key.
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