Search Issue Tracker

Fixed in 2020.2.X

Fixed in 2019.4.X, 2020.1.X



Found in





Issue ID




Particle System mesh UV coordinates change when mesh's geometry layout is changed on import

Visual Effects - Legacy


How to reproduce:
1. Open user-submitted project (
2. Open the Main scene
3. Enter Play Mode
4. Select the 'Particles' GameObject
5. In the Inspector window click 'Import with UV16' button on 'Reimport' script and wait a few seconds

Expected result: UV coordinates remain the same for static cube mesh and particle system meshes
Actual result: UV coordinates remain the same for static cube mesh, but not for the particle system meshes

Reproducible with: 2019.3.0a7, 2019.4.8f1, 2020.1.2f1, 2020.2.0a20
Could not test with: 2018.4.26f1, 2019.3.0a6(VertexAttributeDescriptor not implemented)

With earlier versions of Unity, the static cube mesh does not have the correct material, but the particle system meshes do and still change UV coordinates after reimporting

  1. Resolution Note (fix version 2020.2):

    Fixed in 2020.2.0b1

  2. Resolution Note (fix version 2020.1):

    Fixed in 2020.1.5f1

  3. Resolution Note (fix version 2019.4):

    Fixed in 2019.4.10f1

Add comment

Log in to post comment

All about bugs

View bugs we have successfully reproduced, and vote for the bugs you want to see fixed most urgently.