I've always been curious why the OCIOFileTransform doesn't support support
.spi1d files. It would be very useful in some cases. Anyone know?



-------------------------------
Simon Björk
Compositor/TD

+46 (0)70-2859503
www.bjorkvisuals.com

2016-08-16 12:45 GMT+02:00 Kevin Wheatley <kevin.wheat...@framestore.com>:

> On 16 August 2016 at 11:06, Erik Johansson <erik.johans...@fido.se> wrote:
> > So now I am sitting here wondering why I can't get this to work.
> >
> > Am I correct in that GenerateLUT can't generate a stand alone 1d lut but
> > purely can create a 1d lut combined with a 3d lut?
> >
> > Cause whatever I do the output .cube LUT is a 3d lut and can not be used
> > inverse in OCIOFileTransform
> >
> > TLDR; How do I make a 1d .cube lut in nuke?
>
> feed a ramp through your colour transforms and then use a sampler node
> to capture it. you can then export is as ascii and manually turn it
> into a LUT format the OCIOFileTransform reads, or if you are happy
> with spi1d files, the OCIO code base contains python code to do it for
> you, see here for more ideas:
>
> http://community.thefoundry.co.uk/discussion/topic.aspx?f=189&t=100012
>
> https://github.com/imageworks/OpenColorIO-Configs/blob/
> master/nuke-default/make.py
>
> Kevin
>
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