Oooh - sorry - i see - misunderstood thanks for pointing out
Interesting ill check that ACES one out... :) Neil Scholes +44(0) 7977 456 197 www.uvfilms.co.uk On 31 Aug 2012, at 15:02, Schneider, Abraham wrote: > 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 > _______________________________________________ Nuke-users mailing list [email protected], http://forums.thefoundry.co.uk/ http://support.thefoundry.co.uk/cgi-bin/mailman/listinfo/nuke-users
