State:New|TargetRelease:No Target|icon_bug|icon_nuke|database:public|Resolution:Fixed|BugID:138535|
Problem summary
The .vf LUT doesn't match when written out and read back into Vectorfield.
Customer reported version
Nuke11.1v1
Customer reported platform
macOS 10.12.1 Sierra
Steps to reproduce:
1. Add a CMSTestPattern node with a small size (e.g. 5) to make the effect obvious;
2. Add a GenerateLUT node and write a null LUT (nothing between CMSTestPattern and GenerateLUT) in .vf format;
3. Add a Vectorfield node with the generated LUT.
4. Toggle the viewer between the original CMS pattern and the one processed through the "null" LUT.
Workaround:
There is no current workaround at this time.
Reproduced by Support in:
Nuke 11.3v1 - Windows 10, CentOS 7, macOS 10.13 High
Nuke 11.2v1 - Windows 10
Nuke 11.1v1 - Windows 10
Nuke 11.0v1 - Windows 10
Nuke 10.5v1 - Windows 10
Nuke 10.0v1 - Windows 10
Nuke 9.0v1 - Windows 10
Nuke 8.0v1 - Windows 10, CentOS 7, macOS 10.13 High Sierra
Earliest version tested:
Nuke 8.0v1 - This issue appears to be in all versions of the product
Expected behavior:
The Generated LUT should match the original transform.
Actual behavior:
All color values are multiplied by n/(n-1) compared to the result of the original transform as n1.
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