THE RULES
Anyone visiting a film studio to watch filming will be amazed by the sheer number of spotlights, lamps, lighting fixtures which are standing around among the scenery and which are arranged, moved, positioned “somehow” without one, as a layman, being able to recognise any kind of system.
When someone has come to see the actors working, he will soon become impatient. The setting up of the light takes time, a long time, far longer than the work with the actors. At the same time the lighting technicians work according to rules which have evolved in the course of film history and are all but universally valid, today.
Every scene has a main light, the “guiding light”, “a light source, which influences and determines the directed lighting of the lighting as a whole”.1 The Americans call this the “key light”. This “key light” is determined by a contextual criterion: The set with scenery and actors should look “natural”. This will be achieved if one “allows oneself to be led by the underlying natural source of light which one wants to imitate”2 when lighting the set. What does that mean in a specific case? Contemporary cameramen, senior lighting technicians and other specialists provide us with information:
“For day interiors windows are the most logical light source … When it is very early in the morning or very late in the afternoon, light coming into the room will be at a very low angle, almost parallel.”3
The light in the day interiors thus has a real “natural” source, sunlight. This is imitated or intensified by the spotlights. We are talking about “afternoon” or “morning” here. What happens if the scene is set at midday?
Vilmos Zsigmond (the cameraman fromThe Long Goodbye, 1973 andThe River, 1984) admits that he feels compelled to “cheat”: “I cheat a lot in daylight because I never think of the sun as being as high overhead as it is in California in the summer.” At the same time he takes pains to keep his concept within a realistic context and continues: “I assume the location is in Sweden or Ireland, where the sun travels low around the sky even in the summer months.” In the same breath he admits “cheating”, to assure himself that he is ultimately not filming in either Sweden or Ireland, but rather in California: “So for me day is 10 a.m. or 3 p.m, but it is never noon.”4
Questions about light go beyond the scope of technical matters. The efforts to find a naturalistic “truth” at all costs are astounding. Zsigmond could simply say: I place the spotlights in such a way that the light falls diagonally, almost parallel to the floor of the interior/room – the “cheating” happens first by means of a geographical change – Sweden or Ireland – is then taken back