Post Processing blurs image using VR

Graphics Post-Processing
1

Hi,
I’m using Unity 2019.2 with Unity’s Post Processing 2.0. All is updated.
Using HTC Vive pro, with SteamVR.
When I turn on post processing, and there is not any effect turned on in it, or along side it
(I mean that Antialiasing is off, and all post processing volumes are off)
the image becomes a bit blurry.
( ** It’s hard to see in the attached screenshots, but if you look closely you can see the blurriness.)

Like there’s an automatic bloom (or other) effect that effects the image.
I would expect that turning on/off the post processing on the camera wouldn’t make any effect on the image, if no effects are active.

Am I doing something wrong?
Is there a way to fix this?
Thanks,
Dan

4921532--476852--withoutPost.jpg
4921532--476852--withoutPost.jpg1080×228 44.5 KB
4921532--476855--WithPost.jpg
4921532--476855--WithPost.jpg1082×222 42.6 KB

2

Same here.
Looks like the only options we have is to switch to LWRP, or revert back to 2018.x.

Neither of these is an option for us, so just not using Unity’s Post Processing, instead going with Amplify Bloom + Amplify Color, but the lack of AA is a deal breaker - either need to use forward rendering with MSAA or embrace those jaggies :frowning:

3

This fixed the blurriness for me:
https://github.com/Unity-Technologies/PostProcessing/issues/844

1 Like
4

Hello, how can I apply that workaround to the script from the package manager?

5

For those who will face this problem with Post Processing package version 2.3.0, the solution from the https://github.com/Unity-Technologies/PostProcessing/issues/844 worked for me.

Unfortunately Issues was disabled for that GitHub repository but luckily cached version was saved:
http://webcache.googleusercontent.com/search?q=cache:https%3A%2F%2Fgithub.com%2FUnity-Technologies%2FPostProcessing%2Fissues%2F844

Here is a solution copy-pasted from the cached page with my additions in case it will fade away too:

  1. Close Unity.
  2. Copy-paste Post Processing folder from the Library\PackageCache\com.unity.postprocessing@2.3 to the Assets folder.
  3. Remove Library\PackageCache\com.unity.postprocessing@2.3 folder.
  4. Remove line “com.unity.postprocessing”: “2.3.0”, from Packages/manifest.json
  5. Open file Assets\PostProcessing\Runtime\PostProcessLayer.cs
  6. Replace this line (line 627 in my case)
context.GetScreenSpaceTemporaryRT(m_LegacyCmdBuffer, tempRt, 0, sourceFormat, RenderTextureReadWrite.sRGB);

with lines

if (!context.stereoActive)
   context.GetScreenSpaceTemporaryRT(m_LegacyCmdBuffer, tempRt, 0, sourceFormat, RenderTextureReadWrite.sRGB);
else
   context.GetScreenSpaceTemporaryRT(m_LegacyCmdBuffer, tempRt, 0, sourceFormat, RenderTextureReadWrite.sRGB, FilterMode.Bilinear, context.width*2, context.height);
  1. Save changes and open project.

This fixed problem for me with such prerequisites:

  • Unity 2019.4.0f1
  • Legacy forward render
  • SteamVR with Single Pass stereo rendering mode
2 Likes
6

Unfortunately, this did not fix it for me… I tried all of the other methods found in other places to no avail either. Every time I get this bug, the only option to fix it is to completely restart the project from scratch (create a brand new project and reimport all of my assets, hoping nothing broke in the process) This really needs to be addressed soon, because that’s a bug that existed since forever

7

I know what is the problem! Probabilly you have 2 cameras with the same post processing in the scene, all of you need it’s just disable the post process of one camera