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Max Blur Field Displays the maximum total horizontal and vertical blur amount to clamp the value and
avoid unnecessary rendering. The cumulative effect of the high blur amount (Basic tab), and gamma and
gain correction applied to the Depth map (Depth tab) may result in very large values, which greatly increases
the rendering time. Editable.
Slopes field Displays the gamma value. Applies a gamma curve to the Z-depth map before it is used. Editable.
Depth-O-Gram Settings
Use the Depth-O-Gram settings to refine focus values.
Depth blur effects control the amount of blur based on a depth of field matte. Depth blur settings are
displayed in the Depth-O-Gram tab.
A depth of field map (Z-depth map) can be connected to the node. Black portions of the map are in focus.
White portions display the highest level of blur. Note that a Z-depth map imported from another application
may use the opposite convention and may need to be inverted.
Focus Plane field Displays the distance of your focus point, which is the point at which there is no blur on
the image. Editable.
Focus Offset field Displays the distance between the focus plane and the near offset represented as a
percentage of the total offset range. Select 50% to make the near and far offsets equidistant from the focus
point. Editable.
Focus Range field Displays the distance the near and far offset. Editble.
Frame option box Select how you want to frame the histogram.
Zoom field Displays a vertical zoom value for the histogram to display. You can zoom horizontally by
pressing Ctrl+spacebar and dragging left or right in the histogram. To pan horizontally, click spacebar and
drag left or right in the histogram.Editable.
Z Plot button Click to activate the pick cursor. Use to select a pixel in the image to display its depth.
Z Plot Colour pot Displays the colour that indicates the plane on which the plotted value is located.
Modifying Depth of Field Gesturally
Depth blur effects can be modified gesturally by dragging the focus, near offset, and far offset planes in the
graphic representation of the depth of field. As you drag these elements, the planes are also displayed in the
Result view as a preview of the areas that will be in focus. Use the depth control fields to change the gamma
and gain, and to change the focus range while keeping the focus plane constant. These parameters are
updated in the depth of field display automatically.
1088 | Chapter 23 Effects and Tools Reference