This trend has led to deep focus becoming less common in Hollywood movies. As mentioned in Bordwell's second point, master shots where two or more characters hold a conversation have gone out of fashion, lessening the need for deep focus. In a contemporary Hollywood movie a dialogue scene may consist only of tight close-ups, with the master shot abandoned. If more than one plane in the image contains narrative information, filmmakers switch focus ("rack focusing") instead of keeping both focal planes sharp. In addition, modern sets tend to have less lighting for more comfortable working conditions, and use of deep focus tends to require more light.