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Fixed in 2021.1.X

Fixed in 2018.4.X, 2019.4.X, 2020.2.X



Found in




Issue ID




Seam stitching causes a hard crash with Progressive CPU/GPU and any mesh contains NaN values

Progressive Lightmapper


How to reproduce:
1. Open the attached project named "Case_1263058"
2. Open the Test Scene
3. Click Window -> Rendering -> Lighting Settings -> Generate Lighting

Expected result: The Lightmap is baked without any issues
Actual result: Editor crashes while baking the Scene's lighting

Reproducible with: 2018.4.25f1, 2019.4.4f1, 2020.1.0b16, 2020.2.0a18

1. Does not reproduce when Enlighten is used
2. Graphics APIs tested: D3D11, D3D12, Vulkan, OpenGLCore

Workaround: disable GI contribution or seam stiching for meshes with non-finite values in the UV channels.

  1. Resolution Note (fix version 2021.1):

    Fixed in - 2021.1.0a7. The Editor will now throw error messages regarding the use of meshes with NaN values and the light baking process will freeze to prevent a crash.

  2. Resolution Note (fix version 2020.2):

    Fixed in - 2020.2.1f1

  3. Resolution Note (fix version 2019.4):

    Fixed in - 2019.4.24f1

  4. Resolution Note (fix version 2018.4):

    Fixed in - 2018.4.35f1

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