However, positioning the PolygonGeometry in the right place can be rather tedious. That's why we're providing a billboard utility to do most of the legwork for you. Simply provide it with the 3D coordinates of the two bottom corners, the height (or a point along the top), and the image to be used, and it will automatically generate a placemark like the one in the picture to the right.
For more advanced uses, the utility can also create curved surfaces. Check it out.