Why is controlling the light source one of the first compositional decisions in setting up a still life, rather than an afterthought?
Think about your answer, then reveal below.
Model answer: A single, directional light source creates clear shadows that define the three-dimensional form of every object. It also unifies the scene — all shadows fall in the same direction, making the composition read as coherent. Ambient or multiple light sources flatten form and create confusing, crossing shadow patterns.
Light direction determines where highlights and shadows fall on every object. A lamp placed to one side produces a clear terminator line (the boundary between lit and shadow), cast shadows, and reflected light in the shadow areas — all of which communicate volume. Without deliberate lighting, objects look flat and the composition lacks visual drama.