Game Development Reference
The Hue/Saturation Effect
The Hue/Saturation effect is one of the most useful and
intuitive effects in this chapter. The Hue/Saturation effect is
a favorite in After Effects like it is in Photoshop. And, unlike
other Photoshop transports (such as Channel Mixer and Color
Balance), Hue/Saturation in After Effects works very much like
it does in Photoshop. It's a great effect for universally shifting all
colors, or for globally changing the saturation of an entire image.
You can also use it to colorize an image, which turns the image
grayscale and then adds a color tint. Finally, you can also use it
to choose which color groups to adjust independently. So, if you
wanted to desaturate only yellow tones, you could with the Hue/
For demonstrating this effect, I'm going to use the colorful
Artbeats video clip, KS103.mov that you'll fi nd in the Artbeats
folder in the Media folder of the exercise fi les. Import it and add
it to a composition. Add the Hue/Saturation effect to this clip
(Fig. 6.76 ).
Figure 6.76 The KS103.mov clip
before any adjustments.
First, let's look at how Hue/Saturation deals with global
changes, or in other words, changes that affect the entire image.
If we adjust the Master Hue property, it will cycle all colors in the
image around the color wheel. This usually creates a psychedelic
effect that I still haven't found a practical use for. This hue param-
eter will prove to be very useful a little later, though, so don't
judge this topic by its proverbial cover (Fig. 6.77).