Game Development Reference
In-Depth Information
Figure 12.69 Taking the Noise
drop down to Grain creates larger
granules of noise.
Once you've selected Grain as the Noise value, you can then
adjust the size of the noise using the Grain Size parameter. The
noise can also be animated, by setting keyframes or using expres-
sions with the Noise Phase property.
The Noise HLS Auto Effect
The Noise HLS Auto effect is identical to the Noise HLS effect,
except that the former autoanimates. If you're looking for TV
static noise, for example, you can apply this effect. And, as soon
as you add any noise by increasing the Hue, Lightness, and/or
Saturation values, the noise will automatically change every
frame. You can control the speed of the noise by adjusting the
Noise Animation parameter.
The Remove Grain Effect
The Remove Grain effect is cut from the same cloth as the pow-
erful Add Grain and Match Grain effects that we looked at ear-
lier in this chapter. The difference is that here it is obviously the
removal of grain. Even though this effect can be time consum-
ing to render, the results are quite impressive. The Remove Grain
effect can be particularly helpful when cleaning up noisy video
footage.
Open the Remove Grain.aep project from the Chapter 12 folder
of the exercise fi les. This project contains the image we saw earlier
in this chapter of some kids standing next to a TV set (Fig. 12.70).
When you zoom in to this image—say, to 100% of this very
large image—we can see a lot of noise. This photo was taken with
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