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
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