ID 150856 - Clipped values occur when exporting a Matchgrade LUT and using it in an OCIOFileTransform soft effect.

Problem summary:
Clipped values occur when exporting a Matchgrade LUT and using it in an OCIOFileTransform soft effect.

Customer reported version:
Nuke11.3v3

Customer reported platform:
CentOS7

Steps to reproduce

1) Launch Nuke and create a MatchGrade node.

2) Read in 2 source files and attach them to the MatchGrade node.

3) Set a reference frame key, then execute the Analyze Reference Frames button.

4) Create a LUT output file and execute Write.

5) Open Nuke Studio and import the footage.

6) Right-click the clip on the timeline on select Effects > LUT

7) Choose the file saved from step 4.

8) View the LUT on the timeline versus that in Nuke.

Expected behavior:
The MatchGrade LUT would appear the same in Studio/Hiero as it did in Nuke.

Actual behavior:
The OCIOFileTransform appears with clipped values. The Vectorfield and OCIOFileTransform nodes do not support extrapolation.

Workaround:
Working in a log colorspace seems to correct the issue.

Reproduced by Support in:
Nuke Studio/Hiero 11.3v4 - Windows 10, CentOS 7, macOS 10.13

Nuke Studio/Hiero 11.3v1 - Windows 10

Nuke Studio/Hiero 11.2v1 - Windows 10

Nuke Studio/Hiero 11.1v1 - Windows 10

Nuke Studio/Hiero 11.0v1 - Windows 10

Nuke Studio/Hiero 10.5v1 - Windows 10

Nuke Studio/Hiero 10.0v1 - Windows 10

Nuke Studio/Hiero 9.0v1 - Windows 10, CentOS 7, macOS 10.13

Earliest version tested:
Nuke Studio/Hiero 9.0v1 - This issue appears to be in all versions of the product