Add, Subtract, Offset, and Scale


show more Add, Subtract, Offset, and Scale provides you with in-depth training on Design. Taught by Deke McClelland as part of the Photoshop CS5 One-on-One: Mastery show less
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Add, Subtract, Offset, and Scale

In this exercise, I'm going to explain how the Add and Subtract Blend modes work, since they're so useful where masking is concerned. And how you can modify their behavior using the Offset and Scale values. I'm still working away inside Hair in flight.tif. I've gone ahead and chosen the Calculations command, set the first channel to Blue, the second channel to Red, and Inverted both of them, and then set the Blend mode to Add. The Add blend mode does what it says it does. It adds the luminance levels of one channel to the luminance levels of the other. And as you might imagine, that means the luminance levels get quite a bit brighter.

Now because we've inverted both the channels at this point, they're quite bright where the hair is concerned, for example. So the hair is gone from very dark to very bright now. And when you add the hair, this bright hair from one channel to the bright hair from the other channel, it goes beyond white. It's clipping like crazy. So th...

Add, Subtract, Offset, and Scale
Video duration: 5m 54s 20h 1m Advanced

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Add, Subtract, Offset, and Scale provides you with in-depth training on Design. Taught by Deke McClelland as part of the Photoshop CS5 One-on-One: Mastery

Subjects:
Design Photography
Software:
Photoshop
Author:
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