FUSION · NODE REFERENCE
OCIOFileTransform
External LUT/CDL, CCC ID and interpolation
OCIOFileTransform applies a transform from an external file. Unlike choosing two spaces in OCIOColorSpace, the LUT/CDL itself is the main contract: which RGB state it accepts and which state it returns.
OCIOFileTransform
Overview
What OCIOFileTransform does
OCIOFileTransform applies a transform from an external file. Unlike choosing two spaces in OCIOColorSpace, the LUT/CDL itself is the main contract: which RGB state it accepts and which state it returns.
LUT File selects the file; CCC ID selects a correction within a collection when the format has multiple records. A single .cc correction and a .ccc collection are different cases. The filename is not the shot identifier inside the collection.
Interpolation affects sampling of tabulated LUTs. The capture offers Nearest, Linear, Tetra and Best. Changing interpolation does not create a new look for a mathematical CDL; applicability depends on the reader and LUT dimensionality. Inspect the result and your build’s messages.
Reverse operates only where an inverse is available. Clipping, quantization or mapping different colors to the same value cannot be undone into the original. Account for the screen view separately so that the LUT is not repeated during viewing.
When to use it
Apply an external look or technical LUT to an agreed input.
Select a shot’s CDL from a CCC collection.
Test 3D LUT interpolation and inverse limits.
OCIOFileTransform in context
Screenshots referenced by this article. Open an image to inspect it at full size.
Example for OCIOFileTransform.
Original imageExample for OCIOFileTransform.
Original image