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Fixed in 2021.2.X
Fixed in 2020.3.X
Votes
0
Found in
2019.4.23f1
2020.2.0a9
2020.3
2021.1
2021.2
Issue ID
1330830
Regression
Yes
Unity lightmap UV generation fails with "Uv unwrap failed with no error messages" error when reimporting asset
Reproduction steps:
1. Open attached project "LightmapUVs.zip"
2. Observe Console window, check for errors
3. In Project window, select Assets/3D/Strip_N.fb, right-click and Reimport
4. Observe Console window, check for errors
5. In Lighting window, attempt to bake lightmaps
Expected result: No errors after steps 2 and 4 and you're able to bake lightmaps
Actual result: "Uv unwrap failed with no error message", "Error in uv Unwrapper: Process might have crashed", and "uv-unwrap failed for mesh" errors after steps 2 and 4, unable to bake lightmaps
Reproducible with: 2020.2.0a9, 2020.3.6f1, 2021.1.5f1, 2021.2.0a5
Not reproducible with: 2018.4.34f1, 2019.4.25f1, 2020.2.0a8, 2021.2.0a6, 2021.2.0a15
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Resolution Note (fix version 2021.2):
Fixed in 2021.2.0a6
Resolution Note (fix version 2020.3):
Fixed in: 2020.3.21f1