Game Development Reference
In-Depth Information
are actually shape layers using HDR color
(super white), which is now possible in After
Effects CS4.
In the Effects and Presets panel, when
browsing through effects, the little number
next to the plugin icon for each effect indi-
cates the highest bit depth that the effect can
process (Fig. 21.6).
When you use an 8-bit effect in an HDR
project, the natural looking light effects are
lost because the color of the layer is squished
back to 8 bits. The same is true for 16-bit proj-
ects. Realistic light behavior is only possible
in 32 bits. So, when we apply an 8-bit effect
such as CC Radial Fast Blur, for example, the
power of the color is lost. This is because the
color in the HDR layer was created by using
super white values; values that were whiter
than white. When the super white values are
all smashed to 8-bit values, it all becomes the
same value of white (Fig. 21.7).
The HDR Compander allows us to use
8-bit effects—such as CC Radial Fast Blur—
and keep the color in 32-bit colors. But here's
Figure 21.6 The numbers next to
each effect indicate the bit depth,
which determines the number of
colors the effect can recognize.
Figure 21.7 After applying
an 8-bit effect, we lose our
32-bit color.
the deal. You need to apply one instance of the HDR Compander
effect before the 8-bit effect(s), and another instance of the HDR
Compander effect after the 8-bit effect(s). Think of it like an HDR
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