void OnDisable()
{
DestroyImmediate(m_RainMaterial);
m_RainMaterial = null;
Debug.Assert(Instance == this);
Instance = null;
}
void OnEnable()
{
m_RainMaterial = new Material(rainShader ?? Shader.Find("Hidden/PPRain"));
m_RainMaterial.hideFlags = HideFlags.DontSave;
Debug.Assert(Instance == null);
Instance = this;
}
