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Won't Fix

Votes

0

Found in

2018.3.0a9

2018.4.0f1

2019.1.0a1

2019.1.5f1

2019.2.0a1

2019.3.0a1

Issue ID

1160752

Regression

No

Mesh normals are getting corrupted while editing blend shapes if Blend Shape Normals are set to Import

Asset Importers

-

To reproduce:
1. Open user attached project "TesBorrame.zip"
2. Open "BlendShapes Bug.unity" scene
3. In the hierarchy select Default > Survivor 1 game object
4. In the Inspector in Skinned Mesh Renderer > Blendshapes edit any blend shape and observe the model

Expected: normals are added to the blend shapes correctly without artifacts
Actual: mesh normals become broken the more the blend shapes are changed

Reproduced on:
2018.3.0a9 2018.4.14f1 2018.4.4f1 2019.1.10f1 2019.2.0b9 2019.3.0a7

Notes:
- Unity crashes while opening the project on 2019.3.0a8 - 2019.3.0a9
- Missing prefabs in 2017.4.30f1
- Models are nor visible on 2018.3.0a3 - 2018.3.0a8
- Enabling Legacy Blend Shape Normals or setting Blend Shape Normals to None fixes the issue

  1. Response avatar

    Resolution Note (fix version 2019.3):

    There's an issue with blendshape normals in the FBX SDK which causes those artifacts in some cases. As mentioned earlier, the workaround is to use 'Legacy Blendshape Normals'. Unfortunately there's nothing we can do on our end to fix this.

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