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Fixed in 5.4.2



Found in


Issue ID




[ParticleSystem] Increasing Playback Time makes Editor freeze and finally get "System out of memory" error



Reproduction steps(Gif attached):
1. Open "New Unity Project 28" Unity project.
2. Open "1" scene.
3. Expand "ParticleSystem_OutOfMemory_Test" game object in the hierarchy.
4. Select "fx_flamethrower_y" game object.
5. Click "Simulate"
6. In the Inspector, Particle System component, check "Limit Velocity over Lifetime" checkbox.
- Notice that changes applies immediately.
7. Uncheck this checkbox.
8. Increase "Playback Time" by 200, then repeat step 6, 7 and 8.
- It will take more and more time for changes to apply, eventually crashing the editor(Pic attached).

Regression introduced in:
* 5.4

Comments (2)

  1. Diet-Chugg

    Nov 13, 2016 03:07

    ALBINOSTOICAUG - having same problem as you also on 32 go machine

  2. AlbinoStoic

    Aug 30, 2016 20:55

    My issue was wrongfully closed as duplicate, and differs as follows:

    Steps to reproduce:

    - Create a NEW Unity Project (3D)
    - Add "Standard Assets -> Particles"
    - Create a "Particle System"
    - Add Sub-Emitter (+)
    - "Out of memory" crash after 1-5 seconds (on a 32GB system)

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