Hello Howard Thanks for doublechecking, thats what i found as-well! I think selective colour on relative in photoshop just does something completely different. I'll keep playing around with it and see what i find!
Thanks for your help! All the best Stepan > On 6 Apr 2017, at 19:44, Howard Jones <how...@axis-vfx.com> wrote: > > Hi Stepan > > Had a chance to have a look at the regrading is done like this > > The image is split into its Primaries, secondaries and tertiaries and these > create mattes. > > These mattes are then multiplied by the colour - so from this I would think > that this already is a relative grade as, for example only 50% red is applied > to a 50% matte. > > Cheers > > Howard Jones > Visual Effects Supervisor > m: 07973 265624 | e: how...@axis-vfx.com | w: www.axis-vfx.com > >> On 1 Apr 2017, at 19:30, Howard Jones <how...@axis-vfx.com> wrote: >> >> The main area is quite simple, once the image has been split up into its >> primaries, secondaries and tertiaries, you have a set of mattes which are >> coloured back to the original colour. This is done with an offset from >> memory. This is already multiplied by the matte so it may already be >> relative. Not sure. >> >> If not it may be a case of multiplying a constant by the matte. However I >> think I used to do that and it didn't handle values greater than 1. >> >> Anyway at the moment I haven't worked out how to do this without an >> expression node, which maybe the answer anyway. >> >> Howard >> >>> On 31 Mar 2017, at 5:50 pm, Howard Jones <how...@axis-vfx.com> wrote: >>> >>> Ok >>> Send anything back please and I can update the tool. >>> >>> Howard >>> >>>> On 31 Mar 2017, at 5:34 pm, motion artist <motionarti...@gmail.com> wrote: >>>> >>>> Thanks Howard! I'll experiment and see what I manage to come up with! >>>> >>>> All the best >>>> >>>> Stepan >>>> >>>>> On Thu, Mar 30, 2017 at 5:53 PM, Howard Jones <how...@axis-vfx.com> wrote: >>>>> Found this, I’d have to have a think but don’t wait up for it. >>>>> >>>>> https://www.dpreview.com/forums/post/26485128 >>>>> >>>>>> Relative - Changes the existing amount of cyan, magenta, yellow, or >>>>>> black by its percentage of the total. For example, if you start with a >>>>>> pixel that is 50% magenta and add 10%, 5% is added to the magenta (10% >>>>>> of 50% = 5%) for a total of 55% magenta. (This option cannot adjust pure >>>>>> specular white, which contains no color components.) >>>>>> Absolute - Adjusts the color in absolute values. For example, if you >>>>>> start with a pixel that is 50% magenta and add 10%, the magenta ink is >>>>>> set to a total of 60%. >>>>>> >>>>>> Note: The adjustment is based on how close a color is to one of the >>>>>> options in the Colors menu. For example, 50% magenta is midway between >>>>>> white and pure magenta and receives a proportionate mix of corrections >>>>>> defined for the two colors. >>>>>> >>>>> >>>>> Howard Jones >>>>> Visual Effects Supervisor >>>>> m: 07973 265624 | e: how...@axis-vfx.com | w: www.axis-vfx.com >>>>> >>>>>> On 30 Mar 2017, at 16:54, motion artist <motionarti...@gmail.com> wrote: >>>>>> >>>>>> Hello again >>>>>> >>>>>> So the Secondary Colour works a treat, but I was wondering how to >>>>>> implement the Relative vs Absolute option that the PS selective colour >>>>>> has in Nuke. It doesn't seem like anyone from the photoshop community >>>>>> knows exactly how this works. Has anybody tried reverse engineering that? >>>>>> >>>>>> Appreciate all the help >>>>>> >>>>>> All the best >>>>>> >>>>>> Stepan >>>>>> _______________________________________________ >>>>>> 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 >>>>> >>>>> >>>>> >>>>> >>>>> A X I S V F X >>>>> The Bottle Yard Studios >>>>> Whitchurch Lane >>>>> Bristol BS14 0BH >>>>> >>>>> axis-vfx.com >>>>> >>>>> _______________________________________________ >>>>> 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 > > > > > A X I S V F X > The Bottle Yard Studios > Whitchurch Lane > Bristol BS14 0BH > > axis-vfx.com > _______________________________________________ > 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
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