Library overrides #73318

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opened 2020-01-22 16:40:30 +01:00 by Dalai Felinto · 53 comments

Status: Achieved 2021 targets have been 'archived' at the end of this task, which is now updated for 2022 targets.


Team

Commissioner: @eyecandy @Hjalti @Rikstopher
Project leader: @mont29
Project members: @JulianEisel @Jeroen-Bakker

2022 Targets

Milestone 1 - Resync Performances

  • #94059 (Library Override Resync Performance).
    • #95283 (LibOverride Stronger Hierarchy)
    • #94185 (Outliner ID remapping performance), #95279 (Remap multiple items in referenced data)
    • #95682 (Library Override partial Resync)

Milestone 2 - Improve Usability

  • #95708 (Library Override - Usability).
    • #95707 (Library Override - System override IDs)
    • #95802 (Library Override - Outliner UI/UX)
    • #95816 (Library Override - 'Cherry-Picked' Properties)

Milestone 3 - Dynamic Overrides

  • #54792 (Dynamic Overrides - View layer overrides with override sets) (old, to be revised/updated and fleshed out)

Not A Milestone - Library Overrides for Material

  • Solve issues related to the weird way materials are linked to object or obdata.
  • Support properly nodegroups (i.e. embedded data-blocks, some preliminary work has already been done but needs to be finalized and validated). #82404 (Library Overrides: Shader drivers stop working after save and reload)

Not A Milestone - Future Ideas
Those are ideas existing from the beginning of the project, and which have a partial implementation in core code, but need more UI/UX design and development.

  • #72629 (Library Override: Support editing of animation data in overriden data-blocks.).
  • #82503 (Add Support of PointCaches to Library Overrides).
  • Allow addition of CustomData layers to geometry IDs (new UV maps, shape keys, vertex groups...). This will require a lot of preliminary work.
  • Advanced types of override operations (multiplicative factor for 'factor' porperties like scale, 'bit wise' operations on enum flags, ...).

Relevant links:


2021 Targets

Description
Big picture: Replace animation proxy system, and support local changes from linked data.

Use cases:

  • Animators using proxies for animation.
  • Multiple instances of the same character with different animations.
  • Multiple instances of the same character with variations (e.g., material tweaks, ...).
  • Set dressing with local variations of instanced assets.
  • Override linked in character with cached animation [cache modifier]

Design:

  • Asses feasibility of auto-override - direct change of linked data
  • Need storage optimization document #78944 (LibOverride: How to handle heavy data-blocks (meshes, shape-keys, actions...))
  • Need final signed off design for outliner interaction
  • Need final design for the ID template #78012 (UI: Search Menu Design for Linked Data-blocks)

Engineer plan:
None - underlying code is already implemented.

Work plan

Milestone 1 - Usability Pass

  • #76555 (Library Overrides: Usability issues/paper-cuts)
  • #78012 (UI: Search Menu Design for Linked Data-blocks), #79959 (Data-block Selector Design Changes)
  • D7631: Library Overrides UI: Show library overrides in Outliner
  • #73154 (Library Overrides - UI: Add access to the 'auto override' flag of IDs) (Might become unnecessary, postponed until we know.)
  • Enhance ways to add more than one overrides of same data (this is currently possible, but not obvious nor user-friendly at all).
  • #77083 (Library Overrides Constraint and Modifier Access)
  • #79562 (LibOverride: Support edition of lists (colletions) of ID properties/py-defined RNA collections)

Milestone 2 - Proxy Replacement

  • #81049 (Add operator to convert proxies to library overrides )
  • #72629 (Library Override: Support editing of animation data in overriden data-blocks.)
  • #82503 (Add Support of PointCaches to Library Overrides)
  • Implement real override of shapekeys data-blocks (not editing existing shapekeys, but being able to add new ones, and change influence of existing ones). on hold, we probably want to get rid of shapekeys as data-blocks first.

Milestone 3 - Storage Optimization

  • Do not store whole Mesh data-block in overrides, this is useless and uses a lot of disk space (other obdata IDs are much less critical on that regard, being much lighter, #78944 (LibOverride: How to handle heavy data-blocks (meshes, shape-keys, actions...))).
  • ShapeKeys may need investigation here as well.

Milestone 5 - Remove Legacy

Not A Milestone - Address technical Dept

  • #82160 (LibOverrides - Refactor how diffing of RNA collections is handled, and extend diffing possibilities.). Refactor/technical dept is fixed, potential future improvements are for later.
  • #83811 (Library Override: Investigate Resync Improvements.).

Relevant links:

**Status:** Achieved 2021 targets have been 'archived' at the end of this task, which is now updated for [2022 targets](https://code.blender.org/2022/02/overrides-workshop/). --- **Team** **Commissioner:** @eyecandy @Hjalti @Rikstopher **Project leader:** @mont29 **Project members:** @JulianEisel @Jeroen-Bakker ### 2022 Targets **Milestone 1 - Resync Performances** - [x] #94059 (Library Override Resync Performance). - [x] #95283 (LibOverride Stronger Hierarchy) - [x] #94185 (Outliner ID remapping performance), #95279 (Remap multiple items in referenced data) - [x] #95682 (Library Override partial Resync) **Milestone 2 - Improve Usability** - [ ] #95708 (Library Override - Usability). - [ ] #95707 (Library Override - System override IDs) - [ ] #95802 (Library Override - Outliner UI/UX) - [ ] #95816 (Library Override - 'Cherry-Picked' Properties) **Milestone 3 - Dynamic Overrides** - [ ] #54792 (Dynamic Overrides - View layer overrides with override sets) *(old, to be revised/updated and fleshed out)* **Not A Milestone - Library Overrides for Material** - [ ] Solve issues related to the weird way materials are linked to object or obdata. - [ ] Support properly nodegroups (i.e. embedded data-blocks, some preliminary work has already been done but needs to be finalized and validated). #82404 (Library Overrides: Shader drivers stop working after save and reload) **Not A Milestone - Future Ideas** *Those are ideas existing from the beginning of the project, and which have a partial implementation in core code, but need more UI/UX design and development.* - [ ] #72629 (Library Override: Support editing of animation data in overriden data-blocks.). - [ ] #82503 (Add Support of PointCaches to Library Overrides). - [ ] Allow addition of CustomData layers to geometry IDs (new UV maps, shape keys, vertex groups...). *This will require a lot of preliminary work.* - [ ] Advanced types of override operations (multiplicative factor for 'factor' porperties like scale, 'bit wise' operations on enum flags, ...). --- **Relevant links**: * [Blender Manual ](https://docs.blender.org/manual/en/latest/files/linked_libraries/library_overrides.html) * [the workshop report about overrides from January 2022 ](https://code.blender.org/2022/02/overrides-workshop/) ----------------------- ### 2021 Targets **Description** **Big picture:** Replace animation proxy system, and support local changes from linked data. **Use cases**: * Animators using proxies for animation. * Multiple instances of the same character with different animations. * Multiple instances of the same character with variations (e.g., material tweaks, ...). * Set dressing with local variations of instanced assets. * Override linked in character with cached animation [cache modifier] **Design:** - [x] `Asses feasibility of auto-override - direct change of linked data` - [x] `Need storage optimization document` #78944 (LibOverride: How to handle heavy data-blocks (meshes, shape-keys, actions...)) - [x] `Need final signed off design for outliner interaction` - [x] `Need final design for the ID template` #78012 (UI: Search Menu Design for Linked Data-blocks) **Engineer plan:** None - underlying code is already implemented. **Work plan** **Milestone 1 - Usability Pass** - [x] #76555 (Library Overrides: Usability issues/paper-cuts) - [x] #78012 (UI: Search Menu Design for Linked Data-blocks), #79959 (Data-block Selector Design Changes) - [x] [D7631: Library Overrides UI: Show library overrides in Outliner](https://archive.blender.org/developer/D7631) - [x] *#73154 (Library Overrides - UI: Add access to the 'auto override' flag of IDs) (Might become unnecessary, postponed until we know.)* - [x] Enhance ways to add more than one overrides of same data (this is currently possible, but not obvious nor user-friendly at all). - [x] #77083 (Library Overrides Constraint and Modifier Access) - [x] #79562 (LibOverride: Support edition of lists (colletions) of ID properties/py-defined RNA collections) **Milestone 2 - Proxy Replacement** - [x] #81049 (Add operator to convert proxies to library overrides ) - [x] #72629 (Library Override: Support editing of animation data in overriden data-blocks.) - [x] #82503 (Add Support of PointCaches to Library Overrides) - [x] ~~Implement real override of shapekeys data-blocks (not editing existing shapekeys, but being able to add new ones, and change influence of existing ones).~~ *on hold, we probably want to get rid of shapekeys as data-blocks first.* **Milestone 3 - Storage Optimization** - [x] Do not store whole Mesh data-block in overrides, this is useless and uses a lot of disk space (other obdata IDs are much less critical on that regard, being much lighter, #78944 (LibOverride: How to handle heavy data-blocks (meshes, shape-keys, actions...))). - [x] ShapeKeys may need investigation here as well. **Milestone 5 - Remove Legacy** - [x] #91671 (Remove Proxies). **Not A Milestone - Address technical Dept** - [x] #82160 (LibOverrides - Refactor how diffing of RNA collections is handled, and extend diffing possibilities.). *Refactor/technical dept is fixed, potential future improvements are for later.* - [x] #83811 (Library Override: Investigate Resync Improvements.). --- **Relevant links**: * #53500 (Library Override (parent task)) * [Blender Manual ](https://docs.blender.org/manual/en/latest/files/linked_libraries/library_overrides.html) * @eyecandy did a video to show shortcomes of the current implementation. [state_of_overrides_in_production.mp4](https://archive.blender.org/developer/F8624582/state_of_overrides_in_production.mp4)
Bastien Montagne was assigned by Dalai Felinto 2020-01-22 16:40:30 +01:00
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#53500 was marked as duplicate of this issue

#53500 was marked as duplicate of this issue

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Changed status from 'Needs Triage' to: 'Confirmed'

Changed status from 'Needs Triage' to: 'Confirmed'

This issue was referenced by 1743326889

This issue was referenced by 174332688936911d777ae39d540637edeed1561b

This issue was referenced by bd3ab27410

This issue was referenced by bd3ab27410efc1b3f41eaeda0e9a0ea92749297e

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Here's another movie demonstrating the beginner user experience:

annotated-experience.mp4

I feel that Blender developers usually don't care about beginners, so go ahead and ignore/delete this if you want to.

Here's another movie demonstrating the beginner user experience: [annotated-experience.mp4](https://archive.blender.org/developer/F10045980/annotated-experience.mp4) I feel that Blender developers usually don't care about beginners, so go ahead and ignore/delete this if you want to.

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Member

Just wanted to slip in a comment here to summarize a discussion we had IRL, regarding this bullet point:

Allow addition of CustomData layers to geometry IDs (new UV maps, shape keys, vertex groups...). This will require a lot of preliminary work.

This would be huge for us, and allow us to phase out a lot of hacky pipeline tools and remove a lot of maintenance overhead. Our use cases (very much in a nutshell):

  1. Multiple artists working on an asset: Each artist needs control over a lot of overlapping data. For example, Vertex Groups on a character may need to be added for modeling, rigging, and shading, which could all be a series of .blend files linked in a chain.
  2. Animators want to tweak extreme deformations by adding a shape key on an overridden mesh and sculpting into it.

@mont29 Could you re-iterate here some of the major challenges that will need to be tackled in the coming years, before these ideas have any chance of becoming a reality?

Just wanted to slip in a comment here to summarize a discussion we had IRL, regarding this bullet point: > Allow addition of CustomData layers to geometry IDs (new UV maps, shape keys, vertex groups...). This will require a lot of preliminary work. This would be huge for us, and allow us to phase out a lot of hacky pipeline tools and remove a lot of maintenance overhead. Our use cases (very much in a nutshell): 1. Multiple artists working on an asset: Each artist needs control over a lot of overlapping data. For example, Vertex Groups on a character may need to be added for modeling, rigging, and shading, which could all be a series of .blend files linked in a chain. 2. Animators want to tweak extreme deformations by adding a shape key on an overridden mesh and sculpting into it. @mont29 Could you re-iterate here some of the major challenges that will need to be tackled in the coming years, before these ideas have any chance of becoming a reality?
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