Adobe 12040118 - After Effects Standard Tutorial page 386

Effects CS5 or earlier using the Lens Blur effect retains that effect when opened in After Effects CS5.5 and later. However, you cannot directly
apply the Lens Blur effect in After Effects CS5.5 or later.
Channel Blur effect
The Channel Blur effect individually blurs the red, green, blue, or alpha channels of a layer.
Note: If you have noise or artifacts primarily in one color channel—such as MPEG compression artifacts in the blue channel of DV footage—use
Channel Blur to clean up the noise in that channel, leaving the other channels sharp.
This effect works with 8-bpc, 16-bpc, and 32-bpc color.
Compound Blur effect
The Compound Blur effect blurs pixels in the effect layer based on the luminance values of a control layer, also known as a blur layer or blurring
map. By default, bright values in the blur layer correspond to more blurring of the effect layer, while dark values correspond to less blurring; select
Invert Blur for light values to correspond to less blurring.
This effect is useful for simulating smudges and fingerprints, or changes in visibility caused by atmospheric conditions such as smoke or heat,
especially with animated blur layers such as those generated with the Turbulent Noise effect.
This effect works with 8-bpc, 16-bpc, and 32-bpc color.
Original (upper-left), blur layer (lower-left), and result (lower-right)
Maximum Blur The maximum amount, in pixels, that any part of the affected layer can be blurred.
Stretch Map To Fit Stretches the control layer to the dimensions of the layer to which it is applied; otherwise, the control layer is centered on the
effect layer.
Steve Holmes provides a video tutorial on the
Directional Blur effect
The Directional Blur effect gives a layer the illusion of motion.
Andrew Kramer provides a video tutorial on his
gun slide look as if it is moving quickly.
This effect works with 8-bpc, 16-bpc, and 32-bpc color.
Original (left), and with effect applied (right)
Direction The direction of the blur. The blur is applied equally on either side of the center of a pixel; therefore, a setting of 180° and a setting of 0°
produce the same results.
Fast Blur effect
Artbeats website that demonstrates the use of the Compound Blur effect.
Video Copilot website in which he demonstrates the use of the Directional Blur effect to make a
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