Thanks
Turns out it is the template for the show has loaded in the LUTs (created in
Nuke8). Removing these clears the issue.But this has been fine for a number of
years so looks like a nuke9 bug for sure!
Nuke9 is now using this
x > 0.1496582 ? (pow(10.0, (x - 0.385537) / 0.2471896) -0.052272) / 5.555556 :
(x - 0.092809) / 5.367655
Many thanks!!!
Howard
On Monday, 26 January 2015, 16:13, John Coldrick <[email protected]>
wrote:
I'm wondering if you have set any custom LUTs in your setup files? We had an
identical moment of panic when evaluating Nuke 9 and it turns out there's an
outstanding bug(bad behaviour?) which essentially rebuilds the stack of LUTs if
you have a custom one set with an existing name. We had setup slog LUTs in 8
and when we fired up 9, the LUTs are literally offset, so one might be named
Alexa but might be sRGB! Essentially we removed our custom LUTs and it all
went back to normal.
Note this is not cosmetic - it's the real deal and will make your life very
unhappy if you don't address it.
Cheers,
J.C.
On Mon, Jan 26, 2015 at 10:58 AM, Schneider, Abraham <[email protected]> wrote:
Hi
Where do you find/see this? I just rendered the same AlexaLogC file to a
linear EXR by setting the Read node to colorspace 'AlexaV3LogC' in
Nuke8.0v6 and Nuke9.0v4b, and compared them in one of the Nukes. They
are identical.
So you don't mean the actual curves in the LUT part of the project
settings, right?
Abraham
Abraham Schneider
Head of VFX pipeline / VFX Supervisor
Türkenstr. 89, 80799 München /
Phone +49 89 3809-1096
EMail [email protected]
Visit us on Facebook!------ Originalnachricht ------
Von: "Howard Jones" <[email protected]>
An: "Nuke user discussion" <[email protected]>
Gesendet: 26.01.2015 16:28:38
Betreff: [Nuke-users] AlexaLogC
>
>
>Hi
>
>Just looking at AlexaLogC in nuke8 and nuke 9 and the formulas and
>results are hugely different
>
>Nuke8.6 AlexaLogC
>x > 0.1496582 ? (pow(10.0, (x - 0.385537) / 0.2471896) -0.052272) /
>5.555556 : (x - 0.092809) / 5.367655
>
>
>Nuke9 AlexaLogC
>pow(10,(1023*x-1023)/500)
>
>
>Is this correct in Nuke9 now? Has the specifications changed recently
>for this format. Or is this a mistake?
>
>
>Thanks
>
>Howard
>
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