User Manual

Pre-Divide/Post-Multiply
Selecting this checkbox causes the image’s pixel values to be divided by the Alpha values prior
to the color correction, and then re-multiplied by the Alpha value after the correction. This helps
when color correcting images that include a premultiplied Alpha channel.
Settings Tab
The Settings tab in the Inspector is also duplicated in other Color nodes. These common
controls are described in detail at the end of this chapter in “The Common Controls” section.
OCIO CDL Transform [OCD]
The OCIOCDLTransform node
OCIO CDL Transform Node Introduction
Fusion supports the Open Color IO color management workflow by way of three OCIO nodes.
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The OCIO CDL Transform node allows you to create, save, load, and apply a Color
Decision List (CDL) grade.
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The OCIO Color Space allows sophisticated color space conversions, based on an
OCIO config file.
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The OCIO File Transform allows you to load and apply a variety of Lookup tables
(LUTs).
Generally, the OCIO color pipeline is composed from a set of color transformations defined by
OCIO-specific config files, commonly named with a “.ocio” extension. These config files allow
you to share color settings within or between facilities. The path to the config file to be used is
normally specified by a user-created environment variable called “OCIO,” although some tools
allow overriding this. If no other *.ocio config files are located, the DefaultConfig.ocio file in
Fusion’s LUTs directory is used.
For in-depth documentation of the format’s internals, please refer to the official pages on
opencolorio.org.
Inputs
The OCIO CDL Transform node includes two inputs: one for the main image and the other for
an effect mask to limit the area where the CDL is applied.
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Input: This orange input is the only required connection. It connects a 2D image
output for the CDL grade.
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Effect Mask: The optional blue effect mask input accepts a mask shape created
by polylines, basic primitive shapes, paint strokes, or bitmaps from other tools.
Connecting a mask to this input limits the CDL grade to only those pixels within the
mask. An effect mask is applied to the tool after it is processed.
Chapter – 85 Color Nodes 1889