Films require lighting because film and video see contrast in a much more extreme way than human eyes. Without additional lighting, shadows will be too dark and highlights will be completely white in films. To make a scene look natural on film, it requires enough lighting to allow the film to see the scene similarly to how the human eye sees it. Lighting also helps set the mood of the film and is necessary for many situations where natural light alone would not properly expose a scene, such as night exterior shoots.