Error: unity hdrp fog not working

What's Causing This Error

Several factors could be causing the High Definition Render Pipeline (HDRP) fog to not work in Unity. Here are some common causes:

1. Incorrect HDRP Asset Configuration: The HDRP asset may not have fog enabled, or its parameters might not be set up correctly.
2. Shader Graph Issues: If you're using custom Shader Graph shaders, they might not be compatible with HDRP's fog implementation.
3. Volume Settings Misconfiguration: Fog is controlled by a volume component in HDRP, and if the volume isn't set up properly or doesn't encompass the camera, fog won't appear.
4. Scene View vs Game View: Sometimes fog appears in the Scene view but not in the Game view, which can be caused by different settings or overrides between the two views.
5. Graphics API Compatibility: There could be compatibility issues with the Graphics API you are using. For example, certain features might not work as expected on DirectX 11 versus DirectX 12.
6. Quality Settings: Low-quality settings may disable certain effects, including fog, to improve performance.

Solution - Here's How To Resolve It

To resolve the issue of HDRP fog not appearing in your Unity project, follow these steps:

1. Verify HDRP Asset Settings: Go to the HDRP default settings and make sure that fog is enabled. Adjust the fog parameters according to your needs.
2. Check Volume Components: Ensure that your scene has a Global Volume with a Fog override added to it. Also, make sure that the Camera is within the bounds of any local Volumes that have fog enabled.
3. Review Shader Compatibility: If custom shaders are being used, review them for compatibility with HDRP's fog functionalities or switch to HDRP-compatible shaders.
4. Compare Scene and Game Views: Look for any discrepancies in settings between the Scene and Game views. Ensure that any volume profiles affecting fog are consistent across both.
5. Graphics API Settings: Check the graphics API settings under Edit > Project Settings > Graphics. Try switching to a different API to see if the issue persists.
6. Adjust Quality Settings: Go to Edit > Project Settings > Quality and increase the quality level to ensure fog isn't being culled due to performance optimizations.

If none of these solutions work, consider consulting the Unity forums or checking for updates that might address the issue in case it's a known bug in the version of Unity you're using.