Answer:
Step-by-step explanation:
Three-point lighting is a traditional method for illuminating a subject in a scene with light sources from three distinct positions. The three types of lights are key light, fill light, and backlight.
Key light. This is the primary and brightest light source in the three-point lighting setup. It gives a scene its overall exposure. Cinematographers typically position this main light slightly off to the side of the camera and the front of the subject, on a light stand at a 45-degree angle to the camera, which creates shadows on the opposite side of the subject’s face, giving it dimension and depth. The primary light creates the mood of a scene. Depending upon its position and the supplemental lights used in the overall lighting, it can create a high-key image (evenly, softly lit and atmospherically upbeat) or a low-key image (high contrasts, deep shadows, and very moody).
Fill light: Mirroring the key light on the opposite side of the camera, the fill light literally fills in the shadows that the key light creates on a subject, bringing out details in the darkness. Typically, this secondary light is less bright than the key, and cinematographers control the overall feel of their shots based on how much they dim or lighten the fill light. A dim fill light, where the fill ration is high, creates a high-contrast, film-noir type of shadow, while a brighter light with a lower, more balanced ratio gives the subject a more even look. The second light isn’t always a light: it can be a reflector, a bounce card, a wall, or anything that bounces back some light onto the subject to fill in the shadows. Together with the key light, the fill light determines the mood of a scene.
Backlight: The third source in this lighting technique, the backlight (also known as the “rim light” or “hair light”) shines on a subject from behind, completing the light setup. This creates a rim of light or outline around their head that pushes the subject away from the background and gives a sense of depth. Typically, cinematographers position the backlight directly behind the subject or high enough to be out of frame, opposite the key light, and pointing at the back of the subject’s neck.