- Brecht Van Lommel (Blender)
- Thomas Dinges (Blender)
- Weizhen Huang (interning at Blender)
- Christophe Hery (Meta)
- Brian Savery (AMD)
- Nikita Sirgienko (Intel)
- Michael Jones (Apple)
- Landed in time for Blender 3.4.
- Waiting for OpenPGL 0.4 release to upgrade to new version.
- Thomas will make topic to gather images for release notes.
Many Lights Sampling:
- Brecht and Weizhen plan to work on completing the branch to be ready for master.
- Task was updated to reflect current status, Brecht is adding test files to regressions and benchmarks.
- New PMJ Pattern:
- Some issues found with high sample counts, Nathan looking into solution.
OSL on GPU:
- Patrick did various update, and found a solution that avoids having to build OSL with CUDA/OptiX. Still ideally would go along with changes upstream to avoid having to duplicate code.
- Apple Metal:
- Michael will create a task with design for shader specializations to improve performance, in a way that should not get in the way of users.
- Michael experimented with using multiple devices for the same GPU, and found performance improvements. Brecht suggested to look at using multiple queues instead, since it gives more opportunity to extract coherence in complex scenes if there is a single integrator state array.
- Also a task will be created with proposal for better load balancing for CPU + GPU rendering, which is especially helpful on M1/M2 devices with unified memory. In general multi-device rendering is an important topic to tackle, though Blender developers have not found the time to tackle it yet, any contributions are welcome, be it for CPU + GPU or GPU + GPU.
- AMD HIP:
- ROCm 5.3 was released, Linux users are recommended to upgrade to fix the texture bug.
- Graphics interop still needs to be enabled for HIP.
- Intel OneAPI:
- Brecht will review the direct linking patch again.
- Nikita plans to commit changes to improve ahead-of-time compilation time. These will require more memory usage, will need to keep an eye on the buildbot to ensure it works.
This is a weekly video chat meeting for planning and discussion of Blender rendering development. Any contributor (developer, UI/UX designer, writer, …) working on rendering in Blender is welcome to join and add proposed items to the agenda.
For users and other interested parties, we ask to read the meeting notes instead so that the meeting can remain focused.