Adobe AFTER EFFECTS CS3 PROFESSIONAL User Manual page 547

AFTER EFFECTS CS3 541
User Guide
Compares the extreme highlight of the source color space to that of the destination color
Relative Colorimetric
space and shifts all colors accordingly. Out-of-gamut colors are shifted to the closest reproducible color in the desti-
nation color space. This rendering intent preserves more of the original colors in an image than Perceptual. This
rendering intent is used by default throughout After Effects.
Leaves colors that fall inside the destination gamut unchanged. Out-of-gamut colors are
Absolute Colorimetric
clipped. No scaling of colors to the destination white point is performed. This intent aims to maintain color accuracy
at the expense of preserving relationships between colors.
See also
"Color management" on page 240
Grow Bounds effect
The Grow Bounds effect increases the layer size for the effect that directly follows it. This effect is most useful with
layers that have Collapse Transformations/Continuously Rasterize enabled, because they render using a buffer that's
the size of the composition. For example, if you apply Drop Shadow to a text layer that's partially out of the compo-
sition frame, the shadow will be clipped because only the portion of the text that's in the composition frame will cast
a shadow. Applying the Grow Bounds effect before the Drop Shadow effect prevents the shadow from being cut off.
The number of pixels you specify increases the height and width of the layer's buffer.
Note: You should not need to use this effect when working with effects that work with 32-bpc color, because these effects
have been updated to automatically compensate for layer size.
This effect works with 8-bpc, 16-bpc, and 32-bpc color.
Original (top left); the Wave Warp effect is constrained by dimensions of layer (bottom left); Grow Bounds effect fixes problem (bottom right).
HDR Compander effect
The HDR Compander (compressor/expander) effect gives you a way to work with tools that don't support high–
dynamic range color—such as 8-bpc and 16-bpc effects—without sacrificing the high dynamic range of footage.
The HDR Compander effect works by first compressing the highlight values in the HDR image so that they fall
within the range of an 8-bpc or 16-bpc image, and then expanding the values back to the 32-bpc range.
Apply the HDR Compander effect to a layer once before working with low-dynamic-range tools and effects. Then,
when you're finished, use the HDR Compander effect to expand the dynamic range back to 32 bpc.