// Import the data
electrondensity = Import("watermolecule");
     // Partition the data
electrondensity = Partition(electrondensity);
     // Create a camera appropriate for the data
camera = AutoCamera(electrondensity,"off-diagonal",width=3); 
     // Create an isosurface at a value of 0.3 
iso = Isosurface(electrondensity,0.3);
     // Color the isosurface red, and give it an opacity of 0.3
iso = Color(iso,"red",opacity=0.3);
     // Display the result
Display(iso,camera);


     // Color the isosurface "red", change the opacity back to 1.0, and
     // apply the colors only to the front faces
iso = Color(iso,"red",opacity=1,component="front colors");
     // Color the back faces grey
iso = Color(iso,"grey",component="back colors");
     // Create a ClipPlane. By default it will pass through the center of 
     // the isosurface
clipped = ClipPlane(iso);
     // Display the result
Display(clipped,camera);