From the course: Photoshop Masking and Compositing: Fundamentals
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Mixing a custom "fourth" channel - Photoshop Tutorial
From the course: Photoshop Masking and Compositing: Fundamentals
Mixing a custom "fourth" channel
I've gone ahead and saved out those last two versions of the image. So we now have Grayscale bird.psd and Single-channel grayscale.jpg. Now the reason I went with the native PSD format for the grayscale image is because I needed to retain those layers as well as that mask. So the great thing about native PSD is it allows you to save just about everything you can do inside Photoshop and I say just about, because there is no saving history. However, with the Single-channel grayscale image, I have just one Channel, there are no masks and I have a single Background. So I might as well invoke the JPEG compression, because that ends up delivering a smaller file for you. And speaking of file size it's important to note that just as with layers channels take up space on disk. So bare in mind each channel is another grayscale variation on the image. If you start with three channels in the case of an RGB image and go down one Grayscale channel, why then the new file is going to take-up at most…
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Contents
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The Masks and Channels panels4m 48s
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How color channels work7m 7s
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(Locked)
Viewing channels in color3m 24s
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How RGB works4m 12s
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Single-channel grayscale5m 12s
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Mixing a custom "fourth" channel5m 15s
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The other three-channel mode: Lab5m 45s
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A practical application of Lab4m 55s
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The final color mode: CMYK7m 6s
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Introducing the Multichannel mode5m 56s
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Creating a unique multichannel effect5m 18s
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The channel is the origin of masking1m 54s
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