Thank you so much!
That's actually a relief.
Do you want me to submit an issue on GitHub?

And you of all persons should never have to apologize :)

Thanks again,

On Wed, Jan 27, 2021, 18:06 Larry Gritz <[email protected]> wrote:

> No, dammit, there's a dumb bug. I will post a fix this morning.
>
> Sorry about that.
>
> -- lg
>
>
> On Jan 27, 2021, at 5:51 AM, Daniel Flehner Heen <[email protected]>
> wrote:
>
> Hi!
>
> I'm attempting to implement the use of ImageBufAlgo.ociolook(), but keep
> getting an error message "3D Luts can only be applied in the forward
> direction. (inverse) specified." even if I provide "inverse=False"
>
> oiio.ImageBufAlgo.ociolook(
>     buf,
>     buf,
>     "Twin",
>     "acescg",
>     "out_rec709",
>     inverse=False,
>     colorconfig=ocio_path,
>     roi=roi
> )
>
> Am I misunderstanding what the inverse argument is used for?
>
> The look definition in the config.ocio file:
>
> - !<Look>
>   name: Twin
>   process_space: ACES - ACES2065-1
>   transform: !<GroupTransform>
>     children:
>       - !<ColorSpaceTransform> {src: ACES - ACES2065-1, dst: AlexaV3LogC}
>       - !<FileTransform> {src: twin_FC5213normal_v4.cube, interpolation: 
> linear}
>       - !<ColorSpaceTransform> {src: Output - Rec.709, dst: ACES - ACES2065-1}
>
>
> If I provide anything in inverse_transform like:
>
> inverse_transform: !<ColorSpaceTransform> {src: Output - Rec.709, dst: ACES - 
> ACES2065-1}
>
> to the config, ImageBufAlgo.ociolook() stops complaining, but only applies
> the transform inversed no matter what the inverse argument in ociolook
> says.
>
> I confirmed this by applying the same look in Nuke and setting it to
> inverse.
>
> So it seems ociolook() only favors inverse for some reason.
> Does anyone else have any experience with this?
>
> oiio2.2.10.0
> ocio1.1.1
>
> --
>
> -Daniel
> _______________________________________________
> Oiio-dev mailing list
> [email protected]
> http://lists.openimageio.org/listinfo.cgi/oiio-dev-openimageio.org
>
>
> --
> Larry Gritz
> [email protected]
>
>
>
>
> _______________________________________________
> Oiio-dev mailing list
> [email protected]
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>
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