It’s ok - I have now (re)found the issue 

There is a gamma2.4 which isn’t in the list - which has come from having a 
nuke8 template in nuke9.

I wish they would sort this bug/feature out.

H

> On 13 Nov 2015, at 11:14, Howard Jones <[email protected]> wrote:
> 
> Hi 
> 
> Further to this - this is the difference I have between AlexaLogC in nuke 8 
> (left) AlexaLogC in nuke9 (right).
> The image is really flat and the curve is very different. Can anyone confirm 
> deny the righthand curve.
> 
> I’m suspecting the curves are out of sync ala the LUT bug.
> 
> Nuke Support please see below thread.
> 
> Thanks
> H
> 
> <Screen Shot 2015-11-13 at 11.07.21.png>
> 
>> On 26 Oct 2015, at 20:09, Deke Kincaid <[email protected] 
>> <mailto:[email protected]>> wrote:
>> 
>> I was incorrect about the matrices change.  What you are seeing may just be 
>> the bug which Bruno mentioned.  I am not sure.  It is probably best to talk 
>> to support if you are seeing a major differences.
>> 
>> Joseph Goldstone from Arri was having trouble getting on the mailing list 
>> but he asked me to post this to the list:
>> There would have been a change of matrices with the introduction of SUP 3.0 
>> around December of 2010 or January of 2011. That was when Log C V3 was 
>> introduced.
>> And then with the introduction of the ALEXA Studio, with its optional 
>> slide-into-place internal ND, there was a new matrix set introduced, but the 
>> old matrices still applied when you didn’t have the ND slid into place. 
>> (There was no optics supplier on earth who could give us perfect spectral 
>> flatness given how thin the ND has to be—the optical path is compressed on 
>> the Studio because of the mechanical mirror shutter that supports the 
>> optical viewfinder. So we shipped new matrices. That was in December of 2011.
>> The response of the ALEXA 65 sensor is slightly different than that of the 
>> smaller more traditional 35mm sensors, so we introduced new matrices to 
>> support it in the SDK that went out this summer (summer of 2015).
>> But if you go out and shoot POA [Plain Old ARRIRAW] today, i.e. not a Studio 
>> and not an ALEXA65, you are applying the same matrices now that you were in 
>> January of 2011. We’ve improved our debayering algorithms since then, but we 
>> provide all the old ones, at least, all the ones since the introduction of 
>> the ALEXA predecessor, the D-21, which predates my starting at ARRI in 
>> January of 2011. We revere stability — three fully backwards-compatible 
>> matrix updates in 4.5 years
>> 
>> 
>> 
>> 
>> On Mon, Oct 26, 2015 at 8:42 AM, Deke Kincaid <[email protected] 
>> <mailto:[email protected]>> wrote:
>> I don’t know.  You would have to ask the folks at Arri.
>> 
>> On Fri, Oct 23, 2015 at 3:40 PM, Howard Jones <[email protected] 
>> <mailto:[email protected]>> wrote:
>> Thanks Deke
>> 
>> It's a very different sdk then. Any idea why such a big change?
>> 
>> Howard
>> 
>> On 23 Oct 2015, at 10:38 p.m., Deke Kincaid <[email protected] 
>> <mailto:[email protected]>> wrote:
>> 
>>> Ari will often change and refine their color matrices between sdk versions. 
>>>  So even though people make fun of Red's endless color versions(RedGammaX 
>>> and Red/DragonColorX), at-least you can always get to an older version when 
>>> they change theirs.  Hiero 1.9 has the same SDK as Nuke 8.  You would need 
>>> Hiero 9.x to get the same SDK as Nuke 9.x.
>>> 
>>> On Fri, Oct 23, 2015 at 12:18 PM, Howard Jones <[email protected] 
>>> <mailto:[email protected]>> wrote:
>>> I’ve been looking at raw alexa files converted to linear in nuke8 and 
>>> nuke9. Nuke9 seems screwed or is it a feature (doesn’t match Hiero 1.9v1)!!
>>> 
>>> Howard_______________________________________________
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>>> <http://support.thefoundry.co.uk/cgi-bin/mailman/listinfo/nuke-users>
>>> 
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