The photographer will be shooting underneath the light source.
To achieve butterfly lighting, place the main light source directly behind the camera and slightly above the subject's head. The photographer will be shooting underneath the light source. You may need to place a reflector directly under the subject's chin (or the subject can hold it under his/her chin if necessary). This light pattern is a little more difficult to create using window light or a reflector alone. A harder source of light like the sun or a flash is usually needed to achieve this look. Butterfly lighting will create shadows under the cheeks and chin. Butterfly lighting is great for older subjects because it tends to minimize wrinkles!