UnityEditor.LightmapEditorSettings.GetTerrainSystemResolution C# (CSharp) Method

        internal static extern bool GetTerrainSystemResolution(Terrain terrain, out int width, out int height, out int numChunksInX, out int numChunksInY);
        [MethodImpl(MethodImplOptions.InternalCall)]

        void ShowRealtimeLMGUI(Terrain terrain)
        {
            EditorGUI.indentLevel += 1;

            Hash128 inputSystemHash;

            if (terrain != null && LightmapEditorSettings.GetInputSystemHash(terrain.GetInstanceID(), out inputSystemHash))
            {
                ShowRealtimeLightmapPreview(inputSystemHash);
            }

            // Resolution of the system.
            int width, height;
            int numChunksInX, numChunksInY;

            if (LightmapEditorSettings.GetTerrainSystemResolution(terrain, out width, out height, out numChunksInX, out numChunksInY))
            {
                var str = width.ToString() + "x" + height.ToString();
                if (numChunksInX > 1 || numChunksInY > 1)
                {
                    str += string.Format(" ({0}x{1} chunks)", numChunksInX, numChunksInY);
                }
                EditorGUILayout.LabelField(Styles.RealtimeLMResolution, GUIContent.Temp(str));
            }

            EditorGUI.indentLevel -= 1;
        }