Bug URP very bad shadow flickering only in build mod, none in editor!

Everything was working well, but I just wanted to playtest the game and what I saw was some very bad shadow flickering, but the thing is, everything works fine in the editor.

Here is a video in-editor:
Rake Remastered - Map Singleplayer - Windows, Mac, Linux - Unity 2022.3.6f1 <DX11> (gyazo.com)

Here is a video in-build:
RakeRemasteredDevBuild (gyazo.com)

 

Make sure the builds and editor use the same quality tiers. If you're starting just use 1 tier for simplicity.

If that's done, make sure you are using default shaders like URP Lit to see if it is a shader issue.
If you use custom shaders from amplify, update amplify and the shader.

Maybe try to export the 3D models to a blank project to see if it works there.

Maybe disable URP render features like screen space shadows and screen space ambient occlusion.

Feel free to share the URP asset if you want so I can take a look

 

So I tried everything you said and looks like it might be something with the trees materials or meshes, because changing URP asset settings didn't change anything, but I did notice that it was only happening with the tree shadows. I made a new project and just put the tree models in the project and there I noticed the same shadow problem, but in the editor also. Strangely enough, when I made a build there were still problems with the shadows in the build, but once again no problems in the editor (wtf unity). This problem appeared when I upgraded my project from 2019 LTS to 2022LTS. Will try playing around with the tree prefabs, but don't know if I can do much as they were bought from the unity asset store. EDIT: looks like the alpha cut off of the leaf material is not working on the shadows, that is why tree shadows look 'fatter'. Any idea why that is happening?

 

Looks like there is some problem with Unity 2022LTS, so I will try unity 2023LTS ---> Bug - Shadows alpha clipping doesn't work in build - Unity Forum

 

Hope that works!
Also a bug report might be nice, so it can be fixed

 

Yes, I finally just finished and everything works. After upgrading to 2023 there were many other problems, so I had to downgrade to 2021. It took a lot of time to downgrade, but finallyyyyyyyy everything works perfectly. Thank you very much for trying to help me! As for the bug report it already exists Unity Issue Tracker - Shadows alpha clipping is ignored and shadows rendered without details in Player (unity3d.com), but unity for some reason decided to not fix this very big bug in the 2022 version. Nice one Unity!

 

yeah that one is fully closed, so a new one should be made.
They might have planned a backport which got lost or something