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Fixed in 2018.3

Fixed in 2019.1



Found in





Issue ID




[VR] Particle Systems cause "task.rasterData.indexBuffer == NULL" error and lead to graphical glitches



Steps to reproduce:
1. Create a new project
2. Enable VR
3. Create a particle system
4. Enter playmode and put it in your HMDs view
5. If error doesn't show, repeat Stop / Play of playmode again. (when doing this i can repro it with the MockHMD)

Result: "task.rasterData.indexBuffer == NULL" error in the console and potential graphical glitches

Reproduced on 2018.3.0b8, 2018.3.0b10, 2019.1.0a9
Not reproduced on 2018.2.16f1, 2018.3.0a1, 2018.3.0b7
Regression introduced in 2018.3.0b8

- Is known to also cause memory leaks

  1. Response avatar

    Resolution Note (fix version 2018.3):

    The fix has now landed in our various release versions. 2019.2.0a4, 2019.1.0b2 (available approx 1st February), 2018.3.5f1 (available approx 6th February). Thank you for your patience.

Comments (142)

  1. 3747c31b3b679fbfaf1d157286bfa431?d=mm


    Jan 27, 2019 21:52

    The reason there's no mention of this bug in patch notes is because the bug hasn't been fixed yet, it's not that hard of a concept to understand. A dev replied 2 days ago saying they were testing a possible fix and would update us once ready.

  2. 85f86a16c477dca3280a348adaf8d591?d=mm


    Jan 27, 2019 20:36

    2018.3.3 was released two days ago, no mention of this bug in the release notes... This issue has by far the most votes (by a factor of x4), I wonder what process is in place that prioritizes other issues. Dear technical director, please pay attention to your users.

  3. 22b8a0e4907a3bf944ed142796d106de?d=mm


    Jan 27, 2019 20:36

    I was just about to finish upgrading my project when I discovered this bug with the Particle Systems. I can confirm that this bug is present in Unity 2018.3.0f2 as it is listed as an official build, in Unity Hub, but not listed as one of the test builds being used to reproduce and track this problem. I'm working on a VR project using SteamVR. Originally I was using Unity 2017.4.1f1 but was forced to upgrade to keep up with SteamVR 2.0. Unfortunately, Unity 2018.3.0f2 is the only build that works correctly with it. I make heavy use of Particle Systems, so I hate to find this out just now. If I had known, I would've waited before upgrading.

  4. E567259fc57a48aaffae92dd2ae60eed?d=mm


    Jan 27, 2019 08:12

    Any update?!!

  5. E567259fc57a48aaffae92dd2ae60eed?d=mm


    Jan 27, 2019 08:11

    Hi Unity, when you could release a new version to kill this Bug?
    Even if let us first normal use let the game to the player experience, the game died, our team died, this must not be what you want to see!

  6. E567259fc57a48aaffae92dd2ae60eed?d=mm


    Jan 27, 2019 00:41

    Unity always crash,windows always crash,the build game always crash!!!!

  7. F7d97e9d519ed220fff5e1671a264a7c?d=mm


    Jan 26, 2019 14:39

    over 3 month since bug was reported and still not fixed in latest release... Did unity hired managers from bethesda? this is critical bug what the heck you guys were doing for 3 months?

  8. 05147b725ef2c442f9a00630036fddd2?d=mm


    Jan 26, 2019 13:54

    Thank you for the work.

    I decided to upgrade my unity version 2 weeks ago. I was using 2.17 and it was working well. This bug stopped my game cold. I was going nuts restoring old versions and piecing my game back together.

    Thanks again.

  9. 52d039d5d5d7f28dbed71c033e247774?d=mm


    Jan 26, 2019 13:36

    The fact that this is taking so long the Fix! is probably because it's a more fundamental bug then it sounds, this bug is a show stopper for developers, and quite frankly embarrassing to have in the first place. Is the fix you have working, please keep us updated. What do you mean by which version it will land in?? so you can't fix for all versions?

  10. 6238000e7287865590cd725aa1be71da?d=mm


    Jan 26, 2019 01:54

    Would be great to get an official confirmation that you guys saw the comments indicating this bug does not only affect VR projects.

    Would be a tragedy to fix it for VR and somehow not for the other cases =)

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