UnityCACAO-HDRP17/com.unity.render-pipelines.high-definition/Documentation~/clouds.md

Clouds

The High Definition Render Pipeline (HDRP) includes two cloud solutions that you can use in your Unity project. You can also create custom cloud effects.

Page	Description
Understand clouds	Understand the different ways you can create clouds in HDRP.
Create realistic clouds (volumetric clouds)	Use a Volumetric Clouds Volume Override to create interactable clouds that can render shadows, and receive fog and volumetric light.
Create simple clouds (Cloud Layer)	Use a Cloud Layer Volume Override to create a simple representation of clouds using a 2D texture rendered on top of the sky.
Create custom cloud effects	Create your own custom clouds with their own properties and shaders, while still keeping the clouds consistent with HDRP's lighting pipeline.