Three.js lighting - light types, shadows, environment lighting. Use when adding lights, configuring shadows, setting up IBL, or optimizing lighting performance.
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The 'threejs-lighting' skill provides a comprehensive set of tools and examples for implementing and managing lighting within Three.js scenes. It addresses the challenges developers face when setting up realistic illumination, handling shadows, and configuring environment lighting. By standardizing common lighting patterns, this skill simplifies the process of adding light sources, adjusting intensity, and integrating shadows, thereby improving scene realism and visual quality without requiring extensive manual calculations or trial-and-error adjustments.
This skill covers multiple types of lights including AmbientLight, HemisphereLight, DirectionalLight, PointLight, SpotLight, and RectAreaLight. Each light type comes with detailed properties, usage examples, and configuration options such as intensity, color, position, distance, decay, and shadow settings. For lights that support shadows, the skill provides guidance on map sizes, camera settings, shadow bias, and helper utilities for visualizing shadow cameras. Users can also modify light properties at runtime, giving flexibility for dynamic scenes. It includes both basic usage patterns and advanced settings for optimizing performance while maintaining high-quality lighting effects.
Ideal for developers, 3D artists, and technical enthusiasts working with Three.js, this skill is suitable for a wide range of use cases including outdoor and indoor scenes, simulations, games, and interactive visualizations. It is particularly helpful for users aiming to achieve realistic lighting effects, manage performance costs, and implement environment-based lighting setups. By providing structured examples and explanations, it reduces the learning curve for newcomers while offering advanced configuration guidance for experienced users.
DirectionalLight, PointLight, and SpotLight support shadows natively. RectAreaLight requires custom solutions for shadows, while AmbientLight and HemisphereLight do not support shadows.
Yes, most lights allow runtime adjustments to properties such as color and intensity using methods like .color.set() and direct property assignment for intensity.
Lights like RectAreaLight are more computationally expensive, and higher shadow map resolutions increase rendering cost. Using simpler lights or optimizing shadow settings can improve performance.
The examples are based on modern Three.js usage. Users should verify compatibility with their specific Three.js version, especially for advanced features like RectAreaLight shadows.
You can use THREE.CameraHelper with the light's shadow camera to display the area covered by shadows, which helps in fine-tuning shadow parameters.
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