User Manual

Table Of Contents
Clipping Mode
This option determines how edges are handled when performing domain-of-definition
rendering. This is profoundly important for nodes like Blur, which may require samples from
portions of the image outside the current domain.
Frame: The default option is Frame, which automatically sets the node’s domain of
definition to use the full frame of the image, effectively ignoring the current domain
of definition. If the upstream DoD is smaller than the frame, the remaining area in the
frame is treated as black/transparent.
Domain: Setting this option to Domain respects the upstream domain of definition
when applying the node’s effect. This can have adverse clipping effects in situations
where the node employs a large filter.
None: Setting this option to None does not perform any source image clipping at all.
This means that any data required to process the node’s effect that would normally be
outside the upstream DoD is treated as black/transparent.
Blend
The Blend slider determines the percentage of the affected image that is mixed with original
image. It blends in more of the original image as the value gets closer to 0.
This control is a cloned instance of the Blend slider in the Common Controls tab. Changes
made to this control are simultaneously made to the one in the common controls.
Examples
Following is a comparison of Blur filters visualized as “cross-sections” of a filtered edge. As you
can see, Box creates a linear ramp, while Bartlett creates a somewhat smoother ramp. Multi-box
and Gaussian are indistinguishable unless you zoom in really close on the slopes. They both
leqd to even smoother ramps, but as mentioned above, Gaussian overshoots slightly and may
lead to negative values if used on floating-point images.
Common Controls
Settings Tab
The Settings tab in the Inspector is also duplicated in other Blur nodes. These common controls
are described in detail at the end of this chapter in “The Common Controls” section.
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