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Won't Fix

Planned for 2017.4



Found in


Issue ID




[Particles] non R/W mesh from asset bundle is not rendered in particle system but not detected as unusable



To reproduce:

1. Open the project, attached by the user (
2. Open the "main" scene
3. Use the bundleMesh asset as the mesh in the Particle System on the psr_bundleMesh object
4. Observe that particles are not rendered
5. Use the editorMesh asset instead of the bundleMesh
6. Observe that particles are now rendered

Expected: mesh, loaded from a bundle, is properly used in Particle System

Reproduced in 2017.1.3p3, 2017.2.2p3, 2017.3.1p1, 2017.3.2f1, 2018.1.0a3
Did not reproduce 2018.1.0a4, 2018.1.0f1, 2018.2.0a8

Fixed in 2018.1.0a4

  1. Response avatar

    Resolution Note:

    This bug isn't likely to get fixed, as it's simply not high enough priority.
    The workaround is simple - mark the relevant meshes as Read/Write.

    Unity would like to be able to auto-detect this for you, but it is not trivial in this case.
    Sorry for the inconvenience.

Comments (1)

  1. C7e5a126c31c129d946dd6376a0b7c24?d=mm


    Sep 09, 2019 07:43

    Just happened on my own project.
    Particle system show with no issues on Android / iOS / Editor if they are build in.
    Using asset bundle we get this error;

    No mesh data available for mesh wave_01 on particle system start_aura. Make sure Read/Write Enabled is set in the importer to work on the particle system renderer

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