Howard:

email into support and add your comments to this bug that John previously
added to:
*Bug 46311* - Loading Nuke Root LUTs using an index doesn't work correctly
if a custom curve has been added to a script


--
Deke Kincaid
Media & Entertainment OEM Development Manager
The Foundry
Skype: dekekincaid
Tel: (310) 399 4555 - Mobile: (310) 883 4313
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Email: [email protected]

On Mon, Jan 26, 2015 at 9:34 AM, John Coldrick <[email protected]>
wrote:

> I was told by the Foundry that it's been an existing bug for some time.
>  <shrug>
>
> Anyway, glad you got it sorted....
>
> J.C.
>
> On Mon, Jan 26, 2015 at 12:25 PM, Howard Jones <[email protected]>
> wrote:
>
>> 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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