Strong banding with OCIO in RV (known OCIO issue)

Tobias Pfeiffer

September 15, 2017 08:21

None

Hi,

there is an open Issue #394 for OCIO on GitHub that causes strong banding and color differences in OCIO via the GPU path (vs. CPU). This is discussed here:

https://github.com/imageworks/OpenColorIO/issues/394

and here:

https://groups.google.com/forum/#!topic/ocio-dev/hcI5Fxc04Ko

Would it be feasible to go the CPU path for RV or at least have the option to do so? Would realtime playback still be possible or is the CPU path to slow for that?

This issue is not happening with all configs or LUTs and could not be eliminated totally by adjusting the allocation vars in the config.

As you can see in the screenshot, this is a dealbreaker (in case it's happening). I'm aware of the fact that it is by no means your fault, but having a "fix" until this is solved on the OCIO side would be very helpful.

What do you think?

Regards,

Tobias

Jon Morley September 15, 2017 13:47 Official comment

Hi Tobias,

Unfortunately at the moment all OCIO evaluation (as with all RV shader evaluation) is done on the GPU. At this time there is no plan to change that. We will keep you posted if anything changes.

Thanks,
Jon

Tobias Pfeiffer September 15, 2017 15:07

Hi Jon,

thank you for the info even though it's not helping.

Best,

Strong banding with OCIO in RV (known OCIO issue)

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