Light is a law
Tuesday | February 2, 2010 open printable versionDB here:
What do we see when we look around us? A world teeming with creatures and things. We tend to ignore what enables us to see all that: light. To a great extent, that bias is wired into our perceptual systems. An orange looks the same color to us in sunshine and in shade. But photograph it, and you’ll see that actually it throws off very different wavelengths in the two situations. We evolved, it seems, to mute all the variations in light we encounter. Psychologists call this “the primacy of object perception.”
It takes an artist to shift from the what to the how, to notice how different patterns of illumination can alter the shape and texture of an object. A painter, a photographer, and a cinematographer must learn to see light itself.
This was the core message of Steven Poster, an outstanding Director of Photography who came to visit Madison last weekend. Steven is probably most famous for working with Richard Kelly on Donnie Darko, Southland Tales, and The Box, but he has shot dozens of feature films, shorts, television movies, and pilots. He also has several Madison connections; he hung around the campus in his college years, saw Jules and Jim for the first time in the Memorial Union, and built a production house in Chicago with Mik Derks, who now works for Wisconsin Public Television.
Steven gave a workshop on cinematography that bristled with energy (five hours with only a brief break) and followed that with a screening of The Box, accompanied by a Q & A. Across a single packed Saturday, he took students and faculty on an adventure in seeing.
Seeing the light
Steven started as a still photographer at about age ten, and his ideas of visual design are very much allied with classic image-making. (He carried a Leica with him on his visit, and a display of his photos is currently mounted in a campus gallery.) He has a modernist bent too. He credits his years as a student at Southern Illinois University with introducing him to the ideas of the Bauhaus. He plunged more deeply into Bauhaus ideas at the Illinois Institute of Technology, where Mies van der Rohe and Moholy-Nagy taught.
Later in his career, he studied at the Los Angeles Art Center College of Design. A turning point in his understanding came in Charles Potts’ photography course, when Potts began the semester by announcing softly, “Light is a law.” Steven’s talk for us, he explained modestly, was a “profoundly simple subset” of Potts’ course. Put it another way: In the Bauhaus spirit, he showed how simple principles yield subtle results. Armed with only a white ball, a white cube, and a white cylinder, he gave us a tutorial in the delicate modulations of vision.
There are, Steven suggested, basically only two kinds of light: direct and indirect (or diffuse). Sunshine yields direct light; a cloudy day yields diffuse light. And when light falls on an object, the encounter has five components. The object gains a highlight, the bright region that suggests the direction of the light source. The object also acquires a shadow area. Between the highlight and the shadow is the boundary, or core—an important hint about the quality of the source light. (If the core has a crisp edge, the light is hard; if the core is a mild transition, the light is softer.) The fourth component is the shadow that the object casts on another surface. Finally, there is the specular or incident highlight, a spot of reflected light within the lit region. A specular highlight is a cue for texture as well as shape and light source. As Steven spoke, I kept thinking about Hollis Frampton’s Lemon (1969), a masterfully simple demonstration of many of these principles: slightly changing light reveals a prototypical shape (what other things have the outline of a lemon?) and a surface that is both shiny and bumpy.
By varying the type of light (direct or indirect) and the angle and distance of the source, Steven showed how these five components can be manipulated to bring out expressive qualities of the object. The cube, for example, can gain sharper contours through sidelong lighting, and illuminating the background can bring out its volume. Likewise, an object’s shadow area can be controlled through fill light—though Steven warned about over-filling, which can work against the precision provided by the key light. Another example is the way in which shooting glass or metal with pinpoint sources yields a scatter of specular reflections. If those aren’t wanted, as in some car commercials, the DP can use broad, diffuse illumination. This “liquid light” brings out contours through a softer gleam.
Of course a shot typically combines many objects, so the task of controlling how light hits them, and how they are arranged in relation to each other, becomes much more complicated. The shapes, textures, and emotional qualities of the elements have to be harmonized. “Elegant” was a word Steven used frequently: the composition, like the light, should be clear and well-defined. Needless to say, the result on screen can be grasped at a glance, but achieving such clarity needs painstaking control.
So seeing the light involves grasping everything around you, from landscapes and furniture to people’s faces and clothing, within the framework of highlights, shadow, core, and the like. This alone is enough to change your visual habits. But there’s more. By and large Steven made his adjustments without checking the monitor displaying what the camera was taking in. Standing almost anywhere, he could shift the light, tune the fill, and “wrap” the object, and on the monitor we could see the effect click into place. That skill demands more than a change in how to look at things. It’s an eye-body coordination that takes years of expert practice, an acquiescence to the law of light.
Behind the scenes
The discussion following this demo ranged across many aspects of cinematography, and Steven filled in abstract points with examples from his experience. My notes run to eleven pages, but this sampling should give you an idea of his stimulating presence.
*A problem-solution dynamic emerged in one shot in Donnie Darko, above. We need to see Donnie’s face when he catches up with Gretchen, but the day was sunny and at first the faces display somewhat harsh shadows. But when the couple move toward a kiss, the solution came from their clothes: Donnie’s shirt and Gretchen’s blouse provide softer bounce light on his face.
*Steven stressed the need for complete trust and frankness between director and DP. “I won’t take a job if the director won’t look me in the eye.” Once that bond is established, the DP’s job is to protect the director and work to fulfill his or her vision. “My job is to protect the director.”
*Filmmaking is an intensely physical job, and so two concerns have to be paramount: safety and health. “No film is worth getting somebody hurt,” Steven remarked, so he insists that every crew member is a safety officer, looking out for everyone’s well-being. At the same time, filmmaking demands stamina, discipline, and a clear head, so everyone needs to have a healthy regimen and cultivate a certain “inner life” that keeps job pressures in perspective.
*Steven had much to say about the video assist. He suggested that it has led to directors using more close views, because such shots read better on small monitors. (I made a similar suggestion in The Way Hollywood Tells It.) Steven fights what he calls the “loss of scope” on video displays by presenting the digital dailies in full-size projection, as in the film-based days. “It reminds everybody that we’re making a big movie,” and it encourages directors not to overuse close-ups.
*Steven is happy with the digital intermediate process. As a cinematographer who wants to control all aspects of the image, he welcomes all the adjustments he can make in postproduction, especially thanks to the Lustre grading program. “It’s like being back in the darkroom again.”
*On Donnie, a low-budget film, Kelly and Steven were forced to shoot the family dinner scenes in a single night. To save time, they used “block shooting.” For each actor, a basic setup was established and all the actor’s lines from both scenes were taken at one time. It was faster to have the actor change clothes for the later scene than to shift the camera position and relight the setups.
*Speaking of table scenes, they pose a lot of problems. Even Steven finds such scenes “the hardest.” “Where’s the [180-degree] line in this situation? I’ve seen fights break out on sets about it.”
*At one point Steven talked about prominent objects in a scene, such as candelabra and ketchup bottles. If you use symmetrical reverse shots, those objects can jump distractingly from one side of the screen to the other. Steven tries to make sure that such eye-catchers appear in only one of the setups, not both. The coffee cup in this scene of Southland Tales is hidden in the reverse angles.
Steven’s point reminded me that Ozu breaks this rule of thumb and playfully lets his objects jump around the frame from cut to cut. Indeed, he often rearranged the props to heighten this peripheral dance. In one scene of Late Autumn, the tabasco sauce bottle pivots consistently, but the French’s mustard jar changes position.
*Steven thinks that 3-D will succeed this time, chiefly because of the push for 3-D television. The technique probably won’t work for all stories, and the format poses some technical problems. But the software is getting better, and filmmakers, such as Cameron in Avatar, are starting to avoid the gimmick of obects thrusting out of the screen. It’s better, Steven thinks, to let the depth recede into the movie’s world, making the screen a window. I recalled that this was the strategy used in Coraline, Up, and other films of last year, so perhaps this will become the dominant way that 3-D will be used.
*Steven urged students to get broad general educations and not become movie nerds. They should study history, political science, art, and literature. He pointed out that Werner Herzog, his friend and neighbor, insists in his Rogue Film School that literary classics are the basis of a film education.
*Steven has long been an advocate of unionization. As President of Local 600 of the International Cinematographers Guild, he explained how the Guild now welcomes members, especially women and people of color. I thought it was salutary to give students a taste of the practicalities of professional life by explaining what the Guild had accomplished.
*Steven did additional photography on Blade Runner, and he learned a great deal while gaining deep respect for Jordan Cronenweth, DP on the movie. Steven rewatches the film often, and each time he finds something new. On the last pass, he saw that in the search of Kowalski’s apartment, flickering streaks of light coming from inside the desk drawer call attention to the newspaper that Deckard finds there.
Back in 1980-1982, when Kristin and I were doing research on The Classical Hollywood Cinema, we found that Charles G. Clarke, Linwood Dunn, William Hornbeck, Stanley Cortez, and other professionals whom we interviewed were intellectuals, eager to explain the ideas informing their creative decisions. Steven Poster’s career is another outstanding example of how theory and practice work together, often unobtrusively, to conjure up the enthralling world on screen. I can’t imagine a film researcher, or just a movie lover, not wanting to know filmmakers’ craft and the principles informing it. Once you’ve visit the kitchen, movies gain a whole new flavor.
This blog has intersected with primary Bauhaus shapes before. I discuss “the dinner-table conundrum” in the first few pages of Figures Traced in Light. One of the best analyses I’ve read on illumination in the visual arts is E. H. Gombrich’s “Light, Form and Texture in Fifteenth-Century Painting North and South of the Alps,” in The Heritage of Apelles: Studies in the Art of the Renaissance (Ithaca: Cornell University Pres, 1976), 19-35. For more on Ozu’s penchant for letting brightly lit objects jump around the composition, see this chapter of my Ozu and the Poetics of Cinema. The Lustre program was devised for The Lord of the Rings, and Kristin discusses its origins and influence in The Frodo Franchise, pp. 280-281.
Special thanks to Steven for his visit, the Wisconsin Union Directorate for arranging it, and Erik Gunneson, Joel Ninmann, Justin Daering, and J. J. Murphy for setting up the workshop.
Blade Runner.