public override void Render()
        {
            PreRender();

            var showGrid    = (bool)Modifiers["showGrid"];
            var showTerrain = (bool)Modifiers["showTerrain"];

            skyBox.render();
            if (showTerrain)
            {
                terreno.render();
            }
            grilla.render(Frustum, showGrid);

            PostRender();
        }
        public override void Render()
        {
            PreRender();

            var showGrid = showGridModifier.Value;
            var showTerrain = showTerrainModifier.Value;

            skyBox.Render();
            if (showTerrain)
            {
                terreno.Render();
            }
            grilla.render(Frustum, showGrid);

            PostRender();
        }