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# Blurring with Source Nodes

Motion blur and anti-aliasing can be set for either the front or matte clip of the media. Motion blur simulates the blur created by fast-moving objects by blurring the motion of the front or matte media.

Similar settings for anti-aliasing and motion blur can be found in the Action Setup menu. You have the option of using the same settings from the Setup menu for source nodes, or you can create specific source node settings.

(a) Anti-Aliasing box(b) Anti-Aliasing Softness field(c) Motion Blur button(d) Samples field(e) Motion Blur Curve

Rendering Settings

Anti-Aliasing Sample box
  Select an anti-aliasing sampling level.

Softness field
  Displays the softness of the anti-aliasing sample. Editable.

Z-Buffer Mode box
  Select an option to determine whether the distance from the camera eye is considered.

  Select: | To:
  --- | ---
  Z-Buffer | Arrange sources according to their distance from the camera eye.
  Z-Buffer Off | Not consider the distance from the camera eye when arranging sources.
  Shadow Mix | To render each shadow in the correct Z order with its corresponding source.

Camera Selector box
  Select the child camera under a parent source node.

Shadow Type Settings

Source Shadow Type box
  Select the type of shadow cast for the source node. This setting is available in the Shadow Cast menu only if the shadow cast node is a child of a source node, and is repeated in the Source menu.

Accumulation Settings

Motion Blur button
  Enable to use a motion blur effect for the selected source node (can only be used if the global Motion Blur is enabled in the Action Setup menu).

Phase field
  Displays the frame that motion blur is based on (before or after the current frame). Editable.

Shutter field
  Displays the duration of motion blur at each frame. Editable.

Samples field
  Displays the quality level of motion blur and the depth of field produced by the number of samples taken at each frame. Editable.

  Increasing the number of samples causes the processing time to increase linearly. 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.

TipYou can animate the Motion Blur button, as well as the Phase, Shutter, and Samples fields in the Channel Editor under the source > motion_blur folder.

Motion Blur Curve
  Displays the sample weight over the scope of the motion blur.

Import from Setup button
  Click to use the anti-aliasing and motion blur values from the Setup menu.

Home button
  Resets the curve viewer to show the whole curve.

Reset button
  Resets the anti-aliasing and motion blur settings to their default values.