Specific location or setting where action unfolds — shapes character and plot through spatial context. Both literal place and psychological territory matter.
The location is not a backdrop. It is an actor. Anyone who fails to understand on set or later in editing that a locus — the concrete setting of a scene — carries the psychology of the character, misses half the film's narrative power. A screenwriter does not write into an empty space. They write into a place that already conveys meaning before a character speaks a word.
The locus functions on two levels simultaneously. First, there is the external — the material reality: an abandoned office building, a supermarket at three in the morning, a car on a country road. These physical places have textures, lighting conditions, inherent laws. They set boundaries. A confrontation between two people in an elevator has different possibilities than one on an open street. The camera can breathe differently. The pressure has a different density. Anyone shooting notices this immediately — the locus also determines the space for movement and thus the image composition. This is why cinematographers don't search for a shooting location based on beauty alone, but on what the scene needs: confinement or expanse, height or depth effect, light edges or diffuse spaces.
The second is psychological. The location is a mirror of the inner state. A character behaves differently in their apartment than at a train station. The locus is territory, refuge, battleground, or transit space — and this quality rubs off on every reaction. In the screenplay, it is the task to intertwine this inner state with the outer situation. A cramped space can also constrict a soul. A space of excess can show a lack of will. A space of order can betray control or emptiness. This is not symbolism in the old-fashioned sense — it is dramaturgical bodily knowledge: people change when they change locations.
The multiplicity of loci in a film creates the climate of the entire story. A film that plays almost exclusively in confined, dirty rooms has different breathing room than one set outdoors. The sum of the locations is grammar. Some screenplays are weak because they have no locations — only action in functional spaces. The best scenes arise when the writer, cinematographer, and director understand the locus as a dramatic element, not as an accessory.