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The jagged lines that often occur along the edges of diagonal or curved lines when processing high-frequency
images such as text are the result of aliasing. You can increase or decrease the anti-aliasing sampling level
(up to 64 samples). Higher values yield smoother results at the expense of processing time.
Anti-Aliasing Softness field Displays the softness value of the software anti-aliasing sample. Editable.
Accumulation Settings
Use the Accumulation settings to define motion blur properties.
Global Motion Blur button Enable to use motion blur. Once enabled, specific Action object Motion Blur
buttons can be enabled or disabled. See
About Motion Blur (page 627) for specific examples of creating motion
blurs.
Samples field Displays the quality of motion blur and the depth of field produced by the number of samples
taken at each frame. Editable.
Increasing this value causes the processing time to increase linearly and affects the quality of the depth of
field. The number of motion blur samples is multiplied by the number of anti-aliasing samples. To reduce
the total number of passes made for each frame, reduce the level of anti-aliasing when motion blur is enabled.
Phase field Displays the frame that motion blur is based on (before or after the current frame). Editable.
A value of -100 places the motion blur before while a value of 100 places the motion blur after. A value of
0 is centred, which evenly distributes the motion blur. The default value is 0.
Shutter field Displays the duration of motion blur at each frame (essentially the number of frames that the
shutter is open). Increasing this value does not increase the processing time. Editable
TIP You can animate the Global Motion blur button, as well as the Phase, Shutter, and Samples fields. They can
be found in the Channel Editor under the motion_blur folder.
Motion Blur curve Controls the sample weight over the scope of the motion blur.
Home button Resets the position of the motion blur curve after panning.
Reset button Resets the motion blur curve.
472 | Chapter 15 Compositing in 3D Space with Action