Three.js Lighting When to Use - You need to add or tune lighting in a Three.js scene. - The task involves light types, shadows, environment lighting, or lighting performance tradeoffs. - You want to improve scene readability, realism, or mood through Three.js lighting setup. Quick Start Light Types Overview | Light | Description | Shadow Support | Cost | | ---------------- | ---------------------- | -------------- | -------- | | AmbientLight | Uniform everywhere | No | Very Low | | HemisphereLight | Sky/ground gradient | No | Very Low | | DirectionalLight | Parallel rays (sun) | Yes | Low | |…