campfire/Assets/Scripts/GameOverVR.cs

using UnityEngine;
using UnityEngine.Rendering.PostProcessing;
using UnityEngine.SceneManagement;

public class GameOverVR : MonoBehaviour {
    public PostProcessVolume DarknessVolume;
    public GameState GameState;

    private void Update() {
        DarknessVolume.weight = Mathf.Lerp(DarknessVolume.weight, GameState.Current == State.GameOver ? 1 : 0, 0.5f * Time.deltaTime);
        if (DarknessVolume.weight >= 0.9) {
            SceneManager.LoadScene("Scenes/VRGameOverScene");
        }
    }
}