Hm, if you've got 'vd10' in your OCIO node, you can't be using the ACES config, because vd10 does not exist in the aces config. 'vd10' exists in the 'spi-vfx' config, but that doesn't use the ACES colorspace. For ACES you have to use the iff config or the aces config from www.opencolorio.org.
> Taking an sRGB and converting to linear is a just an inverted gamma thing > right? sRGB is a little bit more than gamma, but yes, it's something like this. But then your'e images are in a linear colorspace which has the same RGB chromaticities than sRGB, but ACES has different chromaticities. So Nuke 'linear' is not the same as ACES linear, at least to my understanding. Abraham Am 31.08.2012 um 16:01 schrieb Neil Scholes: > Really? Im not sure i follow sorry. > > Taking an sRGB and converting to linear is a just an inverted gamma thing > right? > > once in linear you can do whatever you want - and then finally view it as > filmsRGB is you so require... > > > ive got 2 instances of nuke running - one in standard nuke sRGB lut and the > other with an ACES set up - and there is no difference goign from sRGB to > linear and back again. > > > in the aces set up i have an OCIO colorspace node with input set to vd10, > output to linear - bringing me to linear space - then another OCIO colorspace > node : input linear out put vd10 - taking me back to sRGB > > > i have noticed that Log toLin in aces is brighter - i prefer actually. > > > > > > > Neil Scholes > > +44(0) 7977 456 197 > www.uvfilms.co.uk > > > > > > > On 31 Aug 2012, at 14:26, Schneider, Abraham wrote: > >> Hm, but in this way, you're not working in ACES colorspace at all!, because >> the standard colorspace node transforms from sRGB to Nuke linear, which has >> different chromaticities and maybe whitepoint than the ACES colorspace? But >> how do you combine this sRGB-to-Nuke-linear footage with ACES encoded other >> footage? >> >> Abraham >> >> >> Am 31.08.2012 um 15:28 schrieb Neil Scholes: >> >>> Thats what i do - reading in sRGB sequence as linear >>> >>> plonk down a standard colorspace node setting input to sRGB output to Linear >>> >>> do any comp work / grading >>> >>> put down a final colorspace node setting input to Linear - output to sRGB >>> >>> set the display LUT to RAW(sRGB) - >>> >>> (or use a OCIO display node with input color space set to srgb8, display >>> device sRGB and view transform Raw. >>> >>> >>> >>> >>> Neil Scholes >>> >>> +44(0) 7977 456 197 >>> www.uvfilms.co.uk >>> >>> >>> >>> >>> >>> >>> On 31 Aug 2012, at 13:47, Schneider, Abraham wrote: >>> >>>> And an additional question: >>>> >>>> is there a way to go from the old style Nuke linear colorspace to the ACES >>>> colorspace? Both linear of course, but at least the RGB chromaticities are >>>> different, whitepoint as well? >>>> >>>> Of course, it would only be possible to go from Nuke linear to ACES >>>> without a loss, not the other way around because of the different gammut. >>>> >>>> Thanks, Abraham >>>> >>>> >>>> >>>> Am 31.08.2012 um 11:13 schrieb Schneider, Abraham: >>>> >>>>> Hi there! >>>>> >>>>> I just played around with the OCIO nodes/modes in Nuke 6.3v8. I also had >>>>> a look at the ACES workflow/config from the opencolorIO.org website. I've >>>>> added this 'aces' config to Nuke by adding the config.ocio as the custom >>>>> config. >>>>> >>>>> Seems to work fine so far. But there is one thing in this whole >>>>> setup/config that I doesn't really get: how do I use sRGB/rec709/video >>>>> footage (stills and/or movies) in a ACES environment? Normally I'd assume >>>>> to switch the Read node to raw and/or linear (because the Read doesn't >>>>> support OCIO yet), add a OCIOColorSpace, set IN to something like >>>>> sRGB/rec709/etc. and the OUT to aces, to convert the image to the ACES >>>>> colorspace. But there is no IN setting for sRGB/rech709/etc.! I can >>>>> convert ARRI logC, analog film scans (cineon coded), sLog, etc., but not >>>>> 'video' or other display referred encoded material (neither in the iff >>>>> config coming by default with Nuke nor in the aces config from >>>>> opencolorio.org). So how am I supposed to use still images, video stock >>>>> footage, etc. in an ACES workflow in Nuke? >>>>> >>>>> Only way I tried it at the moment was to switch the Read to "sRGB" (or >>>>> rec709 or gamma 2.2 etc.), add a normal Colorspace after the read that >>>>> converts from linear to AlexaV3LogC and add a OCIOColorSpace with IN = >>>>> 'logc' and OUT = 'aces'. Seems to work, but doesn't seem to be a clever >>>>> way. >>>>> >>>>> Do I miss something or is this just not supported at the moment in this >>>>> ACES config/workflow? Using the 'spi-vfx' config in comparison, there is >>>>> the option to set the IN to 'vd8' or 'vd10' or something like that. But >>>>> 'spi-vfx' is not using the ACES colorspace, right? >>>>> >>>>> Abraham >>>>> >>>>> >>>>> Abraham Schneider >>>>> Head of VFX pipeline / VFX Supervisor >>>>> >>>>> >>>>> ARRI Film & TV Services GmbH >>>>> Tuerkenstr. 89 >>>>> D-80799 Muenchen / Germany >>>>> >>>>> Phone +49 89 3809-1269 >>>>> >>>>> EMail [email protected] >>>>> www.arri.de/filmtv >>>>> ________________________________ >>>>> >>>>> >>>>> ARRI Film & TV Services GmbH >>>>> Sitz: München Registergericht: Amtsgericht München >>>>> Handelsregisternummer: HRB 69396 >>>>> Geschäftsführer: Franz Kraus, Dr. Martin Prillmann, Josef Reidinger >>>>> _______________________________________________ >>>>> Nuke-users mailing list >>>>> [email protected], http://forums.thefoundry.co.uk/ >>>>> http://support.thefoundry.co.uk/cgi-bin/mailman/listinfo/nuke-users >>>> >>>> _______________________________________________ >>>> Nuke-users mailing list >>>> [email protected], http://forums.thefoundry.co.uk/ >>>> http://support.thefoundry.co.uk/cgi-bin/mailman/listinfo/nuke-users >>>> >>> >>> _______________________________________________ >>> Nuke-users mailing list >>> [email protected], http://forums.thefoundry.co.uk/ >>> http://support.thefoundry.co.uk/cgi-bin/mailman/listinfo/nuke-users >> >> _______________________________________________ >> Nuke-users mailing list >> [email protected], http://forums.thefoundry.co.uk/ >> http://support.thefoundry.co.uk/cgi-bin/mailman/listinfo/nuke-users >> > > _______________________________________________ > Nuke-users mailing list > [email protected], http://forums.thefoundry.co.uk/ > http://support.thefoundry.co.uk/cgi-bin/mailman/listinfo/nuke-users _______________________________________________ Nuke-users mailing list [email protected], http://forums.thefoundry.co.uk/ http://support.thefoundry.co.uk/cgi-bin/mailman/listinfo/nuke-users
