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Postponed means that the issue was either a feature request or something that requires major refactoring on our side. Since that makes the issue not actionable in the close future we choose to close it as Postponed and add it on our internal roadmaps and technical debt pages instead.
Postponed
Votes
0
Found in
2017.4.0f1
2018.2.15f1
2018.3.3f1
2019.1.0a14
2019.2.0a1
Issue ID
1101009
Regression
No
Some models have missing submeshes when imported as .obj
Reproduction steps:
1. Open attached project ("SubMeshBug")
2. In the Project window, select "Ray Dagger" asset
-- In Inspector window, notice that there is only one Remapped Material
3. In the Project window, select "Ray DaggerBlend" asset
-- In Inspector window, notice that there are two Remapped Materials
Expected: Imported .obj has the two submeshes
Actual: Imported .obj has only one submesh
Reproduced with: 2017.4.18f1, 2018.3.3f1, 2019.1.0a14, 2019.2.0a1
Note:
- Another model (Avenger) in the project with same topology structure and UV mapping does not exhibit the issue
Comments (3)
-
CyberFox01
Mar 25, 2021 03:16
Encountered this issue on Unity 2019.3.1f1
However the problem was not spaces in path, but instead Chinese characters. -
jesusluvsyooh
Oct 13, 2019 12:40
Happens with .obj too, i removed the spaces from all files names (texture, gamesobjects, .obj and materials) and now my submeshes and materials don't vanish.
Latest LTS 2017, 2019
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Resolution Note:
The issue is in the FBX SDK.
It looks like the FBX SDK cannot resolve the .mtl path if it contains a space, replacing 'mtllib Ray Dagger.mtl' by 'mtllib Ray_Dagger.mtl' and updating the .mtl file name accordingly fixes the issue.