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OCIO File Transform [OCF]
The OCIO File Transform node
OCIO File Transform Node Introduction
Fusion supports the Open Color IO color management workflow by way of three OCIO nodes.
– The OCIO CDL Transform node allows you to create, save, load,
and apply a Color Decision List (CDL) grade.
– The OCIO Color Space allows sophisticated color space conversions,
based on an OCIO config file.
– 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,” though 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.
The functionality of the OCIO File Transform node is also available as a View LUT node from the
View LUT menu.
Inputs
The OCIO File Transform node includes two inputs: one for the main image and the other for an effect
mask to limit the area where the color space conversion is applied.
– Input: This orange input is the only required connection. It connects a 2D image for the LUT.
– 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 applied LUT to only those pixels within the mask. An effect mask is applied to
the tool after it is processed.
Basic Node Setup
The OCIO File Transform node is often applied after a Gamut node converts the Loader to linear color
in Fusion Studio.
An OCIO File Transform node applied to a Loader node
after a Gamut node conversion to linear color space
Chapter 94Color Nodes 1846
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