Hm, the known-difference between Vectorfield and OCIOFileTransform appears to be fixed
There was a bug where the Vectorfield was definitely wrong - creating a no-op CSP LUT with CMSTestPattern->GenerateLUT, then applying it with the Vectorfield caused a luminance shift (when it should do nothing) ..but it's fixed as of 6.3v8 The slight difference looks more like interpolation difference On 22/11/13 03:14, Diogo Girondi wrote: > There is a known gain difference between OCIO and Vectorfiled while > working with .csp LUTs. Supposedly OCIO is correct from what I recall. > > This info is somewhere on the OCIO website. > > Here we are trying to keep LUTs in either 3DL or Cube. > > > Cheers, > Diogo > > > On Thu, Nov 21, 2013 at 6:42 AM, John RA Benson <j...@illum-mg.fr > <mailto:j...@illum-mg.fr>> wrote: > > I'm getting a slight difference in the bottom end with > OCIOFileTransform and Vectorfield: > > <vect.jpg> > <ocio.jpg> > <diff.jpg> > > > I will admit, the viewer is boosted quite a bit to see this, and it > is super slight. > > I doubt it really matters, but it's good to be aware there is a > difference if anyone gets tweaked. I'm assuming that using the > OCIOFileTransform would be the preferred method going forward? > > cheers > JRAB > > On 11/21/2013 12:49 AM, John Vanderbeck wrote: >> Viewer is Half-Float. >> >> Changing to OCIFileTransform does fix the issue, so I will go >> forward with that. Thanks! Not too well versed on OCIO so I >> didn't think to try that. >> >> >> >> >> >> >> >> *John Vanderbeck* >> *2D Pipeline TD* >> *T:* +1 604 733 7030 >> >> 1205 Melville Street, Vancouver, B.C, V6E 0A6, Canada. >> primefocusworld.com <http://www.primefocusworld.com> >> >> >> >> On Wed, Nov 20, 2013 at 3:12 PM, Ben Dickson >> <ben.dick...@rsp.com.au <mailto:ben.dick...@rsp.com.au>> wrote: >> >> If you're using a vaguely-recent version of Nuke, you could >> use the >> OCIOFileTransform node instead of the Vectorfield >> >> On 21/11/13 09:05, John Vanderbeck wrote: >> > Hey all, >> > >> > Anyone else run into this? >> > >> > In a standard Nuke script you can bring in a Vectorfield and >> load a .csp >> > LUT file and it works fine. >> > >> > Do the same thing as an automated ViewerProcess though and >> the color is >> > all wrong. Use a .cube file instead and it works. >> > >> > Problem is, while using .cube works, my color guys tell me >> that the >> > .cube file can't handle the proper transforms for what we >> need on this show. >> > >> > >> > >> > >> > *John Vanderbeck* >> > *2D Pipeline TD* >> > *T:* +1 604 733 7030 <tel:%2B1%20604%20733%207030> >> > >> > 1205 Melville Street, Vancouver, B.C, V6E 0A6, Canada. >> > primefocusworld.com <http://primefocusworld.com> >> <http://www.primefocusworld.com> >> > >> > >> > >> > _______________________________________________ >> > Nuke-python mailing list >> > Nuke-python@support.thefoundry.co.uk >> <mailto:Nuke-python@support.thefoundry.co.uk>, >> http://forums.thefoundry.co.uk/ >> > >> http://support.thefoundry.co.uk/cgi-bin/mailman/listinfo/nuke-python >> > >> >> -- >> ben dickson >> 2D TD | ben.dick...@rsp.com.au <mailto:ben.dick...@rsp.com.au> >> rising sun pictures | www.rsp.com.au <http://www.rsp.com.au> >> _______________________________________________ >> Nuke-python mailing list >> Nuke-python@support.thefoundry.co.uk >> <mailto:Nuke-python@support.thefoundry.co.uk>, >> http://forums.thefoundry.co.uk/ >> http://support.thefoundry.co.uk/cgi-bin/mailman/listinfo/nuke-python >> >> >> >> >> _______________________________________________ >> Nuke-python mailing list >> Nuke-python@support.thefoundry.co.uk, http://forums.thefoundry.co.uk/ >> http://support.thefoundry.co.uk/cgi-bin/mailman/listinfo/nuke-python > > > > > _______________________________________________ > Nuke-python mailing list > Nuke-python@support.thefoundry.co.uk, http://forums.thefoundry.co.uk/ > http://support.thefoundry.co.uk/cgi-bin/mailman/listinfo/nuke-python > -- ben dickson 2D TD | ben.dick...@rsp.com.au rising sun pictures | www.rsp.com.au _______________________________________________ Nuke-python mailing list Nuke-python@support.thefoundry.co.uk, http://forums.thefoundry.co.uk/ http://support.thefoundry.co.uk/cgi-bin/mailman/listinfo/nuke-python
