public class GridTrigger : ThreadingExtensionBase
    {
        private TerrainManager terrainManager;
        private ZoneManager zoneManager;
        private GameAreaManager gameAreaManager;

        private bool renderGrid = false;

        public override void OnCreated(IThreading threading)
        {

            terrainManager = Singleton<TerrainManager>.instance;
            zoneManager = Singleton<ZoneManager>.instance;
            gameAreaManager = Singleton<GameAreaManager>.instance;
        }

        public override void OnUpdate(float realTimeDelta, float simulationTimeDelta)
        {

            if (Event.current.alt && Input.GetKeyDown(KeyCode.Z))
            {
                // Turn on zones
                terrainManager.RenderZones = !terrainManager.RenderZones;
                Debug.Log("[RoadAssist] Alt+Z pressed.");
            }

            if (Event.current.alt && Input.GetKeyDown(KeyCode.G))
            {
                Debug.Log("[RoadAssist] Alt+G pressed. Render is " + (!renderGrid ? "on" : "off"));

                renderGrid = !renderGrid;
            }

            if (renderGrid)
            {
                foreach (TerrainPatch patch in terrainManager.m_patches)
                {
                    Render(Singleton<RenderManager>.instance.CurrentCameraInfo, patch);
                }
            }
        }


        private void Render(RenderManager.CameraInfo cameraInfo, TerrainPatch patch)
        {

            if (cameraInfo.Intersect(patch.m_bounds))
            {
                Bounds bounds = patch.m_bounds;
                Material decMaterial = GetPrivateVariable<Material>(patch, "m_decorationMaterial");
                decMaterial.SetVector(Shader.PropertyToID("_DecorationArea"), new Vector4(255,255,255,150));
                decMaterial.SetFloat(Shader.PropertyToID("_DecorationAlpha"), 1.0f);
                GameAreaManager expr_EF_cp_0 = Singleton<GameAreaManager>.instance;
                expr_EF_cp_0.m_drawCallData.m_overlayCalls = expr_EF_cp_0.m_drawCallData.m_overlayCalls + 1;
                Singleton<RenderManager>.instance.OverlayEffect.DrawEffect(cameraInfo, decMaterial, 0, bounds);

            }
        }

        private T GetPrivateVariable<T>(object obj, string fieldName)
        {
            return (T)obj.GetType().GetField(fieldName, BindingFlags.NonPublic | BindingFlags.Instance).GetValue(obj);
        }
    }