threejs-lighting

Three.js lighting relies on combining AmbientLight for base illumination, DirectionalLight for primary shadows, and PointLight or SpotLight for localized effects. Configuring shadow maps on these lights establishes believable depth and realism in real-time rendering.

In WebGL rendering, AmbientLight globally illuminates without direction, PointLight emits outward from a single point, and SpotLight casts a focused cone of light. Selecting the right lighting type dictates scene mood, shadow casting, and overall performance overhead.

Environment lighting and Image-Based Lighting (IBL) in Three.js apply real-world lighting data to materials, capturing complex reflections and diffuse lighting without heavy computational lights. This integration dramatically improves realism for architectural visualizations and interactive demos.

Three.js lighting fully supports real-time applications like game prototypes and architectural visualizations. It provides necessary light types, shadow controls, and performance considerations required to render interactive 3D environments efficiently on the WebGL platform.

Three.js shadows often fail due to incorrect shadow map configuration or disabled shadow casting properties on lights and meshes. Properly tuning shadow cameras and enabling shadow rendering on the specific light types resolves missing or inaccurate shadows.