July 28, 2020

Host: Michael Dolan

Attendees:

• [X] Mark Boorer (TSC) - Industrial Light & Magic

• [X] Sean Cooper (TSC ACES TAC Rep) - DNEG

• [X] Michael Dolan (TSC Chair) - Epic Games

• [X] Carol Payne (TSC) - Netflix

• [X] Doug Walker (TSC Chief Architect) - Autodesk

• [X] Kevin Wheatley (TSC) - Framestore

• [X] Matthias Scharfenberg - Industrial Light & Magic

• [X] Dennis Adams - Sony

• [X] Thomas Mansencal - Weta Digital

• [X] Troy Sobotka

OCIO Configs Working Group Meeting Notes

• License, copyright choice:

  • Need to decide whether to use OpenColorIO's statement, or make a project-specific copyright ("Contributers to the OpenColorIO-Config-ACES project"). John Mertic suggested reusing OpenColorIO statement unless this project will have its own governance, different from OCIO.

  • Group agrees to use same OpenColorIO governance and statement, operating as a sub-project.

  • TODO: Thomas will update PR #4 with revised statements.

• Feature complete state of BuiltinTransform:

  • Michael: OCIO v2 being feature complete does not include all ACES transforms, correct?

  • Doug: Correct, not needed to have all transform initially. Key thing it to have examples which can be built upon. This is a feature more useful to config authors than application integrators. Anticipated working on this after feature complete.

  • Thomas: Makes sense to have skeleton generated by then. People can then write transforms, and work incrementally.

  • Michael: Really just need to modify output to build config instead of graph.

  • Thomas: Transforms already are there - graph is built on it. Could possibly use graph to generate config.

  • Mark: Been writing CTL parser that can compile and eval CTL differently. Have interpreter, which can live compile and run CTL code.

  • Thomas: There's an ACES central thread on future of CTL, discussing similar points. Would be great to share this work there.

  • Mark: Expression transform can then work with CTL directly, and emit glsl, etc to support different renderers.

• Next steps:

  • Use ACES discovery code to generate skeleton OCIO config. Transforms can be omitted to start, unless just using a ColorSpaceTransform to convert between other color spaces.

  • Skeleton will be used to outline missing BuiltinTransform algorithms needed to complete reference config.

  • Reference config will NOT be ready for SIGGRAPH.

• ASWF contributions?

  • Thomas: If time is issue to contribute, could ASWF provide resources to help complete the work. ACES contracted the creation of the original ACES OCIO config for example.

  • Michael: There was some early discussion following GSoC as to whether the ASWF could hire students or developers for a similar dedicated program, but it hasn't been discussed further. ASWF premier members do commit to providing the equivalent of one full time engineer (FTE) to ASWF project contributions each year, so it's possible we could get some help through that.

  • Thomas: Good to have something formalized.

  • Carol: As we get past launch, we might have more time. We're likely to attract new people to the community. We’re all swamped.