Thanks, that gets me close at least.
On 29 April 2014 14:46, Randy Little <randyslit...@gmail.com> wrote: > Photoshop is applying gamma to alpha. Nuke I believe does not. Try > selecting just alpha in PS. Apply levels and set gamma to 2.2 > On Apr 29, 2014 9:34 AM, "Florian Einfalt" < > florian.einf...@saddingtonbaynes.com> wrote: > >> Hi Deke, >> thanks for that, did it just now and it doesn't change anything >> unfortunately. >> When does the sRGB LUT get applied actually? >> >> Thanks. >> Flo >> >> >> On 29 April 2014 14:28, Deke Kincaid <d...@thefoundry.co.uk> wrote: >> >>> Nuke needs to unpremultiply the alpha before applying the sRGB lut and >>> the premultiply it again. Did you check the "premultiplied" box in the >>> read node properties next to the lut selection? >>> >>> -deke >>> >>> >>> On Tuesday, April 29, 2014, Florian Einfalt < >>> florian.einf...@saddingtonbaynes.com> wrote: >>> >>>> I have tried to use: >>>> png 8 and 16 bit >>>> exr 16bit float >>>> tiff 8 and 16bit >>>> >>>> Same behavior with all of them. >>>> >>>> >>>> On 29 April 2014 12:20, Martin Constable <jackyoungbl...@me.com> wrote: >>>> >>>> An obvios suggestion maybe, but have you thought about moving your >>>> workflow to tiffs? Or exrs? >>>> >>>> PNGs do not store info as floating point. They use integers instead. >>>> This might be at the root of yr problem. >>>> >>>> >>>> On 29 Apr, 2014, at 6:56 PM, Florian Einfalt < >>>> florian.einf...@saddingtonbaynes.com> wrote: >>>> >>>> > I tried both using 8bit per pixel and 16bit per pixel. No difference >>>> unfortunately. >>>> > >>>> > Flo >>>> > >>>> > >>>> > On 29 April 2014 11:51, Martin Constable <jackyoungbl...@me.com> >>>> wrote: >>>> > Are yr pngs in 24 bit? That might help. >>>> > >>>> > >>>> > >>>> > On 29 Apr, 2014, at 6:45 PM, Florian Einfalt < >>>> florian.einf...@saddingtonbaynes.com> wrote: >>>> > >>>> > > Hello, >>>> > > >>>> > > I am having this problem with PNGs from Nuke that I need to deliver >>>> in a Photoshop psd-file. This specifically concerns the shadow pass of my >>>> comp but generally there is a discrepancy on everything that is not solidly >>>> opaque. >>>> > > >>>> > > My workflow is as follows: >>>> > > - I write my 8-bit PNG out of Nuke using the sRGB colorspace. >>>> > > - When I open the rendered PNG in Photoshop I assign the sRGB color >>>> profile and over a 'transparent' background the shadow looks to have >>>> similar density to the one in Nuke. >>>> > > - When I comp that layer over a white background though, the shadow >>>> is suddenly more dense than in Nuke. Also, there is a much harsher fall-off >>>> in the shadow. >>>> > > >>>> > > Is this because Photoshop treats alpha information differently from >>>> Nuke? >>>> > > >>>> > > I thought I can maybe counteract this by additional grading in Nuke >>>> but even when I grade the alpha gamma to 0.4545 in Nuke and then write the >>>> PNG I get closer but not exactly to the same result. >>>> > > >>>> > > Does anyone have a suggestion? >>>> > > >>>> > > Thanks. >>>> > > >>>> > > Florian >>>> > > >>>> > > -- >>>> > > >>>> > > >>>> > > Florian Einfalt Senior Digital Artist >>>> > > T +44 (0)20 7833 3032 M +44 (0)7808669580 >>>> > > florian.einf...@saddingtonbaynes.com >>>> > > >>>> > > Saddington Baynes Ltd | Studio 3, 21 Wren Street. London WC1X 0HF. >>>> United Kingdom | Map >>>> > > Disclaimer | Printing? Consider the environment. >>>> > > >>>> > > _______________________________________________ >>>> > > Nuke-users mailing list >>>> > > Nuke-users@support.thefoundry.co.uk, >>>> http://forums.thefoundry.co.uk/ >>>> > > http://support.thefoundry.co.uk/cgi-bin/mailman/listinfo/nuke-users >>>> > >>>> > _______________________________________________ >>>> > Nuke-users mailing list >>>> > Nuke-users@support.thefoundry.co.uk, http://forums.thefoundry.co.uk/ >>>> > http://support.thefoundry.co.uk/cgi-bin/mailman/listinfo/nuke-users >>>> > >>>> > >>>> > >>>> > -- >>>> > >>>> > >>>> > Florian Einfalt Senior Digital Artist >>>> > T +44 (0)20 7833 3032 M +44 (0)7808669580 >>>> > florian.einf...@saddingtonbaynes.com >>>> > >>>> > Saddington Baynes Ltd | Studio 3, 21 Wren Street. London WC1X 0HF. >>>> United Kingdom | Map >>>> > Disclaimer | Printing? Co >>>> >>>> >>>> >>>> Florian Einfalt Senior Digital Artist >>>> T +44 (0)20 7833 3032 M +44 (0)7808669580 >>>> florian.einf...@saddingtonbaynes.com >>>> [image: Saddington & Baynes] <http://www.saddingtonbaynes.com/> >>>> Saddington Baynes Ltd | Studio 3, 21 Wren Street. London WC1X 0HF. >>>> United Kingdom | Map <http://signature.saddingtonbaynes.com/map.php> >>>> Disclaimer <http://signature.saddingtonbaynes.com/disclaimer.php> | >>>> Printing? Consider the environment. >>>> [image: Twitter] <http://www.twitter.com/saddbaynes> [image: >>>> Facebook]<http://www.facebook.com/SaddingtonBaynes> >>>> [image: linkedin] <http://www.linkedin.com/company/saddington-baynes> >>>> [image: >>>> pinterest] <http://pinterest.com/saddbaynes/> [image: >>>> vimeo]<http://vimeo.com/saddingtonbaynes> >>>> [image: behance] <http://www.behance.net/saddington_baynes> [image: >>>> instagram] <http://instagram.com/saddingtonbaynes> >>>> >>> >>> >>> -- >>> -- >>> Deke Kincaid >>> Creative Specialist >>> The Foundry >>> Skype: dekekincaid >>> Tel: (310) 399 4555 - Mobile: (310) 883 4313 >>> Web: www.thefoundry.co.uk >>> Email: d...@thefoundry.co.uk >>> >>> >>> _______________________________________________ >>> Nuke-users mailing list >>> Nuke-users@support.thefoundry.co.uk, http://forums.thefoundry.co.uk/ >>> http://support.thefoundry.co.uk/cgi-bin/mailman/listinfo/nuke-users >>> >> >> >> >> -- >> >> >> Florian Einfalt Senior Digital Artist >> T +44 (0)20 7833 3032 M +44 (0)7808669580 >> florian.einf...@saddingtonbaynes.com >> [image: Saddington & Baynes] <http://www.saddingtonbaynes.com/> >> Saddington Baynes Ltd | Studio 3, 21 Wren Street. London WC1X 0HF. >> United Kingdom | Map <http://signature.saddingtonbaynes.com/map.php> >> Disclaimer <http://signature.saddingtonbaynes.com/disclaimer.php> | >> Printing? Consider the environment. >> [image: Twitter] <http://www.twitter.com/saddbaynes> [image: >> Facebook]<http://www.facebook.com/SaddingtonBaynes> >> [image: linkedin] <http://www.linkedin.com/company/saddington-baynes> >> [image: >> pinterest] <http://pinterest.com/saddbaynes/> [image: >> vimeo]<http://vimeo.com/saddingtonbaynes> >> [image: behance] <http://www.behance.net/saddington_baynes> [image: >> instagram] <http://instagram.com/saddingtonbaynes> >> >> _______________________________________________ >> Nuke-users mailing list >> Nuke-users@support.thefoundry.co.uk, http://forums.thefoundry.co.uk/ >> http://support.thefoundry.co.uk/cgi-bin/mailman/listinfo/nuke-users >> > > _______________________________________________ > Nuke-users mailing list > Nuke-users@support.thefoundry.co.uk, http://forums.thefoundry.co.uk/ > http://support.thefoundry.co.uk/cgi-bin/mailman/listinfo/nuke-users > -- Florian Einfalt Senior Digital Artist T +44 (0)20 7833 3032 M +44 (0)7808669580 florian.einf...@saddingtonbaynes.com [image: Saddington & Baynes] <http://www.saddingtonbaynes.com/> Saddington Baynes Ltd | Studio 3, 21 Wren Street. London WC1X 0HF. United Kingdom | Map <http://signature.saddingtonbaynes.com/map.php> Disclaimer <http://signature.saddingtonbaynes.com/disclaimer.php> | Printing? Consider the environment. [image: Twitter] <http://www.twitter.com/saddbaynes> [image: Facebook]<http://www.facebook.com/SaddingtonBaynes> [image: linkedin] <http://www.linkedin.com/company/saddington-baynes> [image: pinterest] <http://pinterest.com/saddbaynes/> [image: vimeo]<http://vimeo.com/saddingtonbaynes> [image: behance] <http://www.behance.net/saddington_baynes> [image: instagram] <http://instagram.com/saddingtonbaynes>
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