Shadows play an important role in photography beyond just being the absence of light. Photographers should pay as much attention to shadows as they do to light. Shadows can be used to create contrast and drama, focus attention, direct the viewer's gaze, reveal form and texture. Specific techniques for using shadows include using them to create tonal contrast like in a dramatic sunset, hiding detail in shadows to draw the eye, and having shadows point to or surround the center of interest. Camera settings like a low ISO and shutter speed can help achieve defined shadows.