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Fixed in 2.3.0

Fixed in 2.2.3



Found in [Package]





Issue ID




[XR][Post Processing] Bloom and Vignette Effects are rendered twice for each eye when using Multi Pass Stereo Rendering Mode

Package: PostProcessing


How to reproduce:
1. Open case1152584 repro project
2. Open Scenes/SampleScene Scene
3. In the Hierarchy select the PostProcessVolume and Enable Bloom or Vignette effect
4. Enter the Play Mode

Expected result: The effect is being rendered once for each eye
Actual result: The effect is being rendered twice for each eye

Reproducible with: 2019.1.0a11, 2019.1.2f1, 2019.2.0b1, 2019.3.0a2
Not Reproducible with: 2018.3.14f1, 2018.4.0f1

Note1: It seems that the Post-Processing version does not change anything. Tested on 2.1.0 and 2.1.6.
Note2: Could not reproduce on 2019.1.0a1 - 2019.1.0a10 due to compiler errors

  1. Resolution Note (fix version 2.3.0):

    Verified fix in,

    Version: 2020.1.0a20.2541
    Revision: trunk 019325219793
    Built: Thu, 16 Jan 2020 04:57:18 GMT

  2. Resolution Note (fix version 2.2.3):

    Verified fix with

    Version 2019.3.0f6 (27ab2135bccf)
    Wed, 22 Jan 2020 05:13:15 GMT
    Branch: 2019.3/staging

Comments (11)

  1. unitydreamer29

    Jan 19, 2021 17:09

    Below comment refers to issue still present on Quest 2 w/Link. The Rift S is working fine.

  2. unitydreamer29

    Jan 18, 2021 17:46

    Vignette still rendering twice in 2019.4.14 with PostProcessing 2.3.0 and 3.0.1.

  3. nicholasdiiorio95

    Nov 20, 2019 20:25

    unity_VaYl193jfKW3NQ Wow thanks! You saved my day!

  4. unity_VaYl193jfKW3NQ

    Aug 28, 2019 13:55

    Hi, I found a workaround for the VR multi-pass rendering.

    I hope this bug will be fixed formally.

  5. ethan_unity569

    Aug 27, 2019 02:08

    Any update on how to do this? I just tried to unzip their tgz file on the install of Unity, edit the file, zip the folder back up, send the tgz to some website that converts zip to tgz, and replaced that in my local install. I also edited my local which each time I did that would previously have Unity default back to the installer version. This did not work for me. Any other tips?

  6. ethan_unity569

    Aug 27, 2019 01:34

    Hey Strom_Art I been unable to get your fix to work. Any possibility of giving a quick description on how to make this edit? I found the local file but every time I edit it (bloom appears to break when I edit it if Unity is up) and on relaunch, it will come back still broken. Have a lot of emissive objects and a demo on Wed. and hoping to find a solution.

    Currently editing the Bloom.shader in my repo\Library\PackageCache\com.unity.postprocessing@2.1.7\PostProcessing\Shaders\Builtins

    Any idea how to access the core shader and edit it so each input doesn't get a new edit?

  7. AndyKorth

    Aug 21, 2019 16:29

    I have reproduced this issue on Unity 2019.2.1f1, using the Postprocessing version [2.1.7], which is dated 2019-06-12.

    As there been any progress on this issue? Between this and other postprocessing issues, we've had to disable post processing in our VR project for several months now.

    Is postprocessing for vr effectively abandoned for the standard render pipeline? Should we be expecting to migrate to the LWRP for postprocessing support in VR? Any guidance would be appreciated, thank you!

  8. saschka

    Aug 06, 2019 18:29

    I'm still seeing it on the Oculus Quest.
    Sadly the _MainTex_TexelSize.xy fix didn't make any difference for me.

    Are there any updates on this or has anyone found a workaround?


  9. Strom_Art

    Jul 25, 2019 11:35

    Hi there! We've been having the same issue here with the bloom where it's been split down the middle of each eye. We managed to solve it by going into Bloom.shader manually by changing every instance of this (about 6 lines):




    We assume it's 'UnityStereoAdjustedTexelSize' that's causing the offset that messes up the post processing, but that seems to have sorted it out for us and it hasn't broken so far. We're going to try it out on the vignette shader and see if that helps with anything.

  10. KospY

    Jun 14, 2019 07:55

    Any news about this issue?

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