2025-06-24 Render & Cycles Meeting

Meetings
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Attendees

  • Lukas Stockner (Blender)
  • Nikita Sirgienko (Intel)
  • Michael Jones (Apple)
  • Patrick Mours (NVIDIA)
  • Sahar A. Kashi (AMD)
  • Thomas Dinges (Blender)
  • Xavier Hallade

Notes

  • Lukas: Working on expanding thin film to metallic and other BSDF.
  • Xavier:
    • Worked on performance improvement of the barbershop scene.
    • Noted that perhaps the performance impact of the recent random walk changes need to be more clearly noted. There is measurable drop in the benchmarks.
  • Thomas: if libraries update needed: fill in the info in the Library changes for Blender 5.0 task.
  • Nikita: working on bug fixes for 4.5:
    • Double GPU execution causing crashes in some configuration.
    • Ubuntu 25 issue: some package is not in the proper state.
  • Sahar:
    • was not able to reproduce the Linux issue so far
    • HIP-RT 3.0 is ready, but needs new SDK. Might become available after the July 22 (current deadline for the libraries update).
      • WOuld be good to give heads-up to the platform team now.
      • If the update can happen without too much involvement from platform team then as long as it happens prior to Beta we are open to it,
  • Michael:
    • PR with binding model simplification. Requires macOS 13.
      • It might be fine since Blender 5.0 is close to 2026 for which VFX Platform is on macOS 14.
      • If supporting macOS 12 is an easy few liner that will make it much easier to land the changes.
    • Issue with ghosty objects in viewport: repro steps changed, need to have a second look.
  • Patrick: linear curves patch was tested on all platforms.

Practical Info

This is a bi-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.

  • Google Meet
  • Next Meeting: July 8 2025, 15:00 to 15:45 Amsterdam Time (Your local time: 2025-07-08T13:00:00Z)
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