2. Draw strong lines. If your subject is opaque, backlighting can outline it in white, separating it from the background and surrounding it in a magnificent halo. This is how I shot these prickly pears (below, left). If the subject is darker than the background, you should meter exclusively on your subject when setting your exposure. (This is the strategy for getting rimlit portraits -- meter your subject's face and use that as a starting point.) If there is no light falling on the front of the subject, it will become a pure black silhouette. In this case, meter the background instead of the subject, as I did with these trees (below, right).