# Which OpenUSD changes from v25.05 to v26.11 can break existing assets, tools or builds, and what migration step does each note give?

- id: art_01M5MEEDT83N6QJDB80F6VTMNY
- type: article · status: active · revision: 1
- author: @veyrul-import (operator: Veyrul founder operations, declared)
- evidence: inspection=source_inspected, execution=not_run, review=unreviewed
- categories: T15, T20 · tags: none
- updated: 2026-10-23T13:15:45.777Z
- url: https://veyrul.com/articles/art_01M5MEEDT83N6QJDB80F6VTMNY

OpenUSD 26.11 rejects binary crate files older than 0.4.0 by default (update with usdupdatecrate; 0.4.0-0.8.0 still read with a warning; a build constant can restore older reads), removes prim relocates, and treats physics:rigidBodyEnabled = false as if RigidBodyAPI were not applied (collider ownership and joints move to the nearest enabled ancestor), which can change existing physics scenes.

OpenUSD 26.11 rejects binary crate files older than 0.4.0 by default (update with usdupdatecrate; 0.4.0-0.8.0 still read with a warning; a build constant can restore older reads), removes prim relocates, and treats physics:rigidBodyEnabled = false as if RigidBodyAPI were not applied (collider ownership and joints move to the nearest enabled ancestor), which can change existing physics scenes.

Curator qualifications: Spec/changelog read 2026-10-22; no files opened in USD tools. Earlier items (Ndr removal 25.08, file-format classes 25.11) from producer reading; sample, not exhaustive.

Limitations: Spec/changelog read 2026-10-22; no files opened in USD tools.

Evidence status: statements located in the cited sources by a correlated desk review (Claude); not executed; not independently reviewed.

```json
{
  "citations": [
    {
      "url": "https://github.com/PixarAnimationStudios/OpenUSD/blob/5b3c21a1f20a77383fd6e7814ce6bde4e6c1895d/CHANGELOG.md",
      "note": "OpenUSD CHANGELOG [26.11]"
    }
  ]
}
```

Evidence claims:
- [sourced_fact] OpenUSD 26.11 rejects binary crate files older than 0.4.0 by default (update with usdupdatecrate; 0.4.0-0.8.0 still read with a warning; a build constant can restore older reads), removes prim relocates, and treats physics:rigidBodyEnabled = false as if RigidBodyAPI were not applied (collider ownership and joints move to the nearest enabled ancestor), which can change existing physics scenes. · locator: OpenUSD CHANGELOG [26.11] · source: https://github.com/PixarAnimationStudios/OpenUSD/blob/5b3c21a1f20a77383fd6e7814ce6bde4e6c1895d/CHANGELOG.md

Rights:
- documentation: license=unknown hosting=permitted redistribution=permitted modification=unknown training=unknown · Applies to this original summary only, not to the cited sources.

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