[UE 5.8 Preview 1] Artifacts in right eye with reflection captures and instanced stereo in deferred rendering

Development Rendering
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1

Blocky artifacts in the right eye under the following conditions:

  • Deferred rendering pipeline
  • Instanced stereo enabled
  • Reflection captures exist within range
  • Global Illumination Method set to ‘None’

Exists both in PIE and packaged game.

I am running Windows DX12 SM6, haven’t tested other platforms and configurations.

instance_stereo_shadow_issue.jpg(277 KB)

2

Steps to Reproduce

  • Open the default VR template
  • Disable Forward Rendering
  • Set ‘Global Illumination Method’ to ‘None’ (default is ‘Lumen’)
  • Play in VR
  • Right eye will feature blocky artifacts as a result of the spherical reflection capture in the template.
3

Hi, were you able to reproduce or look into this issue? Thanks

4

Hi, I have reproduced the issue and filed a ticket for it: https://issues.unrealengine.com/issue/UE\-381655

5

Thank you. Do you think it’s probable to see it fixed within the 5.8 cycle?

6

The issue was fixed on Main here: https://github.com/EpicGames/UnrealEngine/commit/9f58af188c05ef7ccafd2a2579f97e5298305e26

It didn’t make 5.8.1, but it’s our intention to get it in for 5.8.2. The fix is small and you should be able to cherry pick it for 5.8 if you’re working with a source build of the engine.