It could be a old bug - this template had had the LUTs automagically inserted - 
and it looks like 9 has a new order of LUTs.
On 26 Jan 2015, at 17:34, 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
> 
> 
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>   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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