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Fixed in Unity 2019.2



Found in


Issue ID




SkinnedMeshRender with blend shapes gives "Thread group size must be above zero" error when GPU skinning is enabled

Graphics - General



Priority: 2Necessary for shipping a final release


Severity: 3Secondary functionality broken

Reproduction steps:
1. Open the attached project named "Case_1121794"
2. Try to move the "ExampleScene" object in the Sample scene
3. Observe the console

Expected result: No error messages are thrown
Actual result: Error messages are thrown

Reproducible with: 2018.3.9f1, 2019.1.0a8, 2019.2.0a7, 2019.2.0a8
Not reproducible with: 2019.1.0a9, 2019.1.0b7, 2019.2.0a6
Could not test with: 2017.4

Could not test with 2017.4 due to overhauled prefabs
With 2019.2.0a7 and above no more pink textures are shown, however, the error messages remain
The bug is caused by one of the 'o' objects located in the prefab(Snapshot_1121794_V1)

Comments (1)

  1. 104e7a27c612efac575ba55db7ae50cf?d=mm


    May 12, 2019 23:35

    This issue doesn't occur in 2017.4; it only began when we upgraded to 2018.4. It's a massive issue for us as disabling GPU skinning drops our frame rate from 60 fps to 35 fps in some scenes.

    Does anyone know roughly how long it will take for this to be back-ported to 2018.4?

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