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 <[email protected]> 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 < > [email protected]> 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 <[email protected]> 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 < >> [email protected]> wrote: >> >> > I tried both using 8bit per pixel and 16bit per pixel. No difference >> unfortunately. >> > >> > Flo >> > >> > >> > On 29 April 2014 11:51, Martin Constable <[email protected]> wrote: >> > Are yr pngs in 24 bit? That might help. >> > >> > >> > >> > On 29 Apr, 2014, at 6:45 PM, Florian Einfalt < >> [email protected]> 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 >> > > [email protected] >> > > >> > > Saddington Baynes Ltd | Studio 3, 21 Wren Street. London WC1X 0HF. >> United Kingdom | Map >> > > Disclaimer | Printing? Consider the environment. >> > > >> > > _______________________________________________ >> > > 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 >> > >> > >> > >> > -- >> > >> > >> > Florian Einfalt Senior Digital Artist >> > T +44 (0)20 7833 3032 M +44 (0)7808669580 >> > [email protected] >> > >> > 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 >> [email protected] >> [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: [email protected] > > > _______________________________________________ > Nuke-users mailing list > [email protected], 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 [email protected] [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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