motivated and unmotivated lighting

  refers to lighting (or a light source) that is naturally existing in the real world, i.e., from a lamp post, table lamp, sunlight shining through a window, etc., that appears in a scene; for the lighting to appear natural in a film scene, it should seem to be coming from light sources that are visible or implied within the scene; the opposite effect is unmotivated lighting

  Example: Andy's crucifixion victory stance in The Shawshank Redemption (1994) was lit by unmotivated or inexplicable lighting