HX-PGS-AIM-Android/Library/PackageCache/com.unity.render-pipelines..../Samples~/URPPackageSamples/CameraStacking/3D Skybox/Scripts/SkyboxCamera.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.Rendering.Universal;

public class SkyboxCamera : MonoBehaviour
{
    [SerializeField] private Camera m_MainCamera;
    [SerializeField] private float m_SkyboxScale = 1f;

    private Vector3 mainCamStartPos;
    private Vector3 skyboxCamStartPos;

    // Start is called before the first frame update
    void Start()
    {
        if (m_MainCamera == null)
        {
            m_MainCamera = Camera.main;
        }
        mainCamStartPos = m_MainCamera.transform.position;
        skyboxCamStartPos = transform.position;
    }

    // Update is called once per frame
    void Update()
    {
        Vector3 mainCamDeltaPos = m_MainCamera.transform.position - mainCamStartPos;
        transform.position = skyboxCamStartPos + mainCamDeltaPos * m_SkyboxScale;

        transform.rotation = m_MainCamera.transform.rotation;
    }
}