Game Development Reference
settings are fi ne). Then increase the amount of black and white in
this result using Levels. Finally, top it all off with the Glow effect
and a Color Balance effect with lowered blue values (Fig. 12.61).
Figure 12.61 The galactic results
using the Noise effect.
The Noise effect is often neglected because the results aren't
very compelling when the effect is used by itself. But when used
in conjunction with other effects, Noise becomes a valuable tool
because of its fl exibility and impressive rendering speed.
The Noise Alpha Effect
The Noise Alpha effect is yet another noise effect feature, but
it allows you to add noise that adjusts the alpha channel. This is
great for adding wear and tear to objects.
Open the Noise Alpha.aep project from the Chapter 12 folder
in the exercise fi les. This contains the familiar ghost that I created
in Illustrator, against a red solid background. The ugly contrast is
intentional, so that the Noise Alpha effect results are more con-
spicuous (Fig. 12.62 ).
Apply the Noise Alpha effect to the Ghost Body layer. You might
notice that the Fast Blur effect has been applied to this layer as
well. Just ignore that for now. With the Noise Alpha effect, noth-
ing happens until we bump up the Amount value. I'm going to
start with a value of 50%. I'm also going to zoom in to 200%, so the
results are more apparent in the following screenshots (Fig. 12.63).
A t fi rst glance, this effect might appear to only add noise.
Actually, it's creating holes in the layer's alpha channel, showing
through to the red solid beneath.