Check waves and ripples
To get information about water surface displacement due to waves and ripples, use the GetDeformationBuffer API.
Example
using UnityEngine;
using UnityEngine.Rendering.HighDefinition;
public class WaterDeformationExample : MonoBehaviour
{
    // Reference to the water surface component
    public WaterSurface waterSurface;
    // Material to apply the deformation (waves and ripples) effect
    public Material waterMaterial;
    // Shader property name for deformation texture in the water material
    private readonly string _deformationTextureProperty = "_DeformationTex";
    void Start()
    {
        // Get the deformation buffer for the entire water surface
        Texture deformationBuffer = waterSurface.GetDeformationBuffer();
        if (deformationBuffer != null)
        {
            // Apply the deformation buffer as a texture to the water material
            waterMaterial.SetTexture(_deformationTextureProperty, deformationBuffer);
            Debug.Log("Deformation buffer applied successfully.");
        }
        else
        {
            Debug.LogWarning("Deformation buffer could not be retrieved.");
        }
    }
}