Configure your URP Renderer:
If you don’t have any 3D environment, add a plane at position 0,0,0 and scale it to 100.
Create empty game object in scene hierarchy root
Set its position to center of your scene and rotation to 0,0,0
Add Foliage Surface component
You’ll be prompted in inspector to create new storage - do it
Go to Area tab:
Click Volume Edit Mode
Set its boundaries to envelop your 3D scene
Make sure Volume Raycast Mask is properly configured so it will include only your essential, static 3D environment
Click Update - Resize
Click Bake Heightmap
(optional) To verify heightmap baking process you can enable Preview LOD Plane
Exit edit mode
Go to Layers tab:
Go to Editor tab:
Done - start painting!