--- a/volume_io/Testing/test_graphics.c
+++ b/volume_io/Testing/test_graphics.c
@@ -1,38 +1,81 @@
 
 #include  <def_graphics.h>
 
+#define  LIGHT_INDEX  0
+
 main()
 {
-    Status         status;
-    window_struct  *window;
-    lines_struct   lines;
-    Point          point;
-    Status         initialize_lines();
-    Status         begin_adding_points_to_line();
-    Status         add_point_to_line();
-    Status         delete_lines();
+    Status            status;
+    window_struct     *window;
+    lines_struct      lines;
+    polygons_struct   polygons;
+    static Surfprop   spr = { 0.4, 0.5, 0.5, 40.0, 1.0 };
+    Point             point;
+    Vector            normal, light_direction;
+    Status            initialize_lines();
+    Status            begin_adding_points_to_line();
+    Status            add_point_to_line();
+    Status            delete_lines();
+    Status            initialize_polygons();
+    Status            begin_adding_points_to_polygon();
+    Status            add_point_to_polygon();
+    Status            delete_polygons();
 
     status = G_create_window( "Test Window", -1, -1, -1, -1, &window );
 
     G_set_view_type( window, MODEL_VIEW );
 
-    status = initialize_lines( &lines, make_Colour(255,255,128) );
+    /* ------------ define line to be drawn  ------------- */
+
+    status = initialize_lines( &lines, make_Colour(255,255,0) );
 
     status = begin_adding_points_to_line( &lines );
 
-    fill_Point( point, -0.2, -0.2, 0.0 );
+    fill_Point( point, -0.2, -0.32, 0.0 );
+    status = add_point_to_line( &lines, &point );
+
+    fill_Point( point, 0.2, -0.32, 0.0 );
     status = add_point_to_line( &lines, &point );
 
-    fill_Point( point, 0.2, 0.2, 0.0 );
-    status = add_point_to_line( &lines, &point );
+    /* ------------ define polygons to be drawn  ------------- */
+
+    status = initialize_polygons( &polygons, make_Colour(0,255,255), &spr );
+
+    status = begin_adding_points_to_polygon( &polygons );
+
+    fill_Point( point, -0.3, -0.3, 0.0 );
+    fill_Vector( normal, -1.0, -1.0, 1.0 );
+    status = add_point_to_polygon( &polygons, &point, &normal );
+    fill_Point( point, 0.3, -0.3, 0.0 );
+    fill_Vector( normal, 1.0, -1.0, 1.0 );
+    status = add_point_to_polygon( &polygons, &point, &normal );
+    fill_Point( point, 0.3, 0.3, 0.0 );
+    fill_Vector( normal, 1.0, 1.0, 1.0 );
+    status = add_point_to_polygon( &polygons, &point, &normal );
+    fill_Point( point, -0.3, 0.3, 0.0 );
+    fill_Vector( normal, -1.0, 1.0, 1.0 );
+    status = add_point_to_polygon( &polygons, &point, &normal );
+
+    /* ------------ define lights ----------------- */
+
+    fill_Vector( light_direction, 1.0, 1.0, -1.0 );/* from over left shoulder */
+
+    G_define_light( window, LIGHT_INDEX, DIRECTIONAL_LIGHT,
+                    make_Colour(255,255,255),
+                    &light_direction, (Point *) 0, 0.0, 0.0 );
+    G_set_light_state( window, LIGHT_INDEX, ON );
+
+    G_set_lighting_state( window, ON );
+
+    /* ------------ draw objects ------------- */
 
     G_draw_lines( window, &lines );
+    G_draw_polygons( window, &polygons );
     G_update_window( window );
 
-    (void) printf( "Hit return: " );
-    (void) getchar();
+    status = delete_lines( &lines );
 
-    status = delete_lines( &lines );
+    status = delete_polygons( &polygons );
 
     status = G_delete_window( window );