2023-11-06 Grease Pencil Module Meeting

[filedescriptor]

Date/Time: 2023-11-06T15:00:00Z
Link: https://meet.google.com/xxo-tyin-rem
Attendees :

• Antonio Vazquez (Developer)
• Amélie Fondevilla (LFS, Developer)
• Daniel Martinez Lara (Grease Pencil Core team)
• Falk David (Blender developer)
• Matias Mendiola (Grease Pencil core team)
• Samuel Bernou (ADV Studio, Python dev)

Topics

• General updates
• Development updates

Meeting Notes

• General updates since the last meeting
  • The Blender Conference happend from October 26th - 28th.
    • There were many Grease Pencil related talks. Here is a list for some of them (links to YouTube video recordings):
      • Grease Pencil 3: A technical deep-dive
      • Line Art and future Non-photorealistic rendering process discussion
      • Next Lab Grease Pencil VR - the MPX (mouse, pen & xr) workflow vision
      • Grease Pencil scenes for testing tools and algorithms
      • Playing with Grease Pencil: an Adventure in 2.5D
  • There was a Line Art meeting at the Blender HQ (meeting notes link).
  • There was a meeting with some grease pencil developers about the fill bucket tool
    • We talked about the different implementations (current approach is a pixel based flood-fill algorithm, and there is a new geometry based algorithm).
    • We agreed that the fill-bucket should not be a brush, but a tool.
    • There should be a way to call the core implementation from Python.
• Developent updates
  • Multi-frame editing was added (commit).
    • Still needs to be fully tested to make sure it works as expected
  • There were lots of bug fixes

Show all commits

• GPv3: Draw strokes relative to the object origin by Falk David
• Fix: GPv3: Crash when drawing by Falk David
• Fix: GPv3: Crash earsing when using modifier by Falk David
• Fix: GPv3: Erasing when object is not at the origin by Falk David
• Fix: GPv3: Crash when transforming keyframes by Falk David
• GPv3: Menus updates by Matias Mendiola
• Fix #114060: GPv3: Transform crash with multiple object editing by casey bianco-davis
• GPv3: Rename GP_Layer/GP_Group to Layer/Group by Falk David
• GPv3: Rename stroke_color_set to stroke_material_set by Antonio Vazquez
• GPv3: Multi-frame editing by Falk David
• GPv3: Include current frame in multi-frame editing by Falk David

• Community Tasks
  • There is now a #114158: GPv3: Community Tasks: Overview to track all the open community tasks for new contributors
  • 15 or so tasks that are still open
• Falk: Is now working on adding support for material locking.
  • Better to add support for this now rather than later (so we don’t need to adapt all the operators).
• Matias: What is the plan regarding multi-object editing
  • Antonio: Problem is that a grease pencil object has multiple layers, it’s own materials, etc. so it’s unclear how this would work. E.g. how do we show this in the UI to the user?
  • Falk: Thinks it’s going to be a topic for the future (after feature parity for GPv3)
• Matias: How do we improve current Grease Pencil materials to better integrate with actual Mesh/Curves materials shaders?
  • Falk: Yes, this is a bigger topic that we need to think about. The current Grease Pencil render engine probably needs to be redesigned to fit the new data model of Grease Pencil.
• Falk: There is a task that is meant to record all the changes between GPv2 and GPv3: #114419: Documentation: Changes between Grease Pencil v2 and Grease Pencil v3
  • Help with documenting the changes is welcome (anyone can leave a comment on the task)
  • Future PRs that introduce a change will need to update this task as well.

Next Meeting

• Time/Date: 2023-11-21T15:00:00Z
• Link: 2023-11-21 Grease Pencil Module Meeting
• Agenda:
  TODO