Sometimes the dynamic range of a scene is too much for a single exposure to capture all the information. One method for dealing with that is to take two pictures, each with an exposure optimezed for one part of the scene, and blend the exposures in post process. Alternately, you can take one RAW exposure (just make sure the highlights are not totally blown!) and develop two pictures to blend. For the tutorial view the images and directions from "BE1" though "BE5".