DayNightCycleManager.Update C# (CSharp) Method

    void Update()
    {
        // Rotate the sun and the moon.
        float timeProgress = realToInGameTime(Time.deltaTime);
        if ((dayTime += timeProgress) >= 24)
            dayTime = 0;
        transform.Rotate(0, 0, hoursToDegrees(timeProgress));

        // Diminue l'intensité du soleil la nuit
        float coef = -Mathf.Cos(dayTime/24f * 2*Mathf.PI);
        coef = Mathf.Sign(coef)*Mathf.Pow(Mathf.Sign(coef)*coef, 0.25f);
        coef = coef/2 + 0.5f; // To range [0, 1]
        sun.intensity = sunMaxIntensity * coef;
    }