Dynamic Occlusion Flickering in Unity 2020.3.1f1 LTS. How to fix?

Questions & Answers
1

Hello!

When I upgraded my project from Unity 2019.4.16f1 to 2020.3.1f1 LTS, dynamic occlusion no longer functions properly. I am using URP and it is a VR project. When I look in certain directions, some meshes flicker or disappear. If I turn off dynamic occlusion on an individual mesh, then that mesh no longer flickers so I know the issue is related to dynamic occlusion. I don’t consider turning off dynamic occlusion to be a “fix” - I need it for performance reasons.

Video: Unity 2020.3.1f1 Dynamic Occlusion Flickering - YouTube

This issue did not occur in Unity 2019, and began as a direct result of upgrading the project to 2020.3.1f1 LTS. Re-baking occlusion in the scene does not help at all.

How can this issue be fixed?

2

I was able to fix it by lowering the camera far clip plane distance. It was set to 100,000 and I lowered it to 10,000 which fixed the issue.

More detail here: https://forum.unity.com/threads/dynamic-occlusion-flickering-in-unity-2020-3-1f1-lts.1083230/