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threejs-lighting

Explain Three.js lighting setups with shadows and IBL configuration.

1|Updated Mar 23, 2026
Search Tags:#rendering#webgl#threejs#lighting#shadows#ibl#realism
One-click install
npx skills add https://github.com/sbalagan22/bloomr --skill threejs-lighting-sbalagan22
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: threejs-lighting
Source: https://github.com/sbalagan22/bloomr/tree/main/.claude/skills/threejs-lighting
Command: npx skills add https://github.com/sbalagan22/bloomr --skill threejs-lighting-sbalagan22

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

Three.js lighting configuration is often complex and error-prone; this Skill provides a clear, structured guide to implementing robust lighting setups, shadows, and environment-based lighting to achieve realistic 3D scenes.

Core Features & Use Cases

  • Lighting types: AmbientLight, HemisphereLight, DirectionalLight, PointLight, SpotLight, RectAreaLight, plus shadows and performance considerations.
  • Shadows & optimization: Enabling shadows, shadow map tuning, and bias adjustments to prevent artifacts.
  • Environment lighting (IBL): Integrating HDRI and cube textures for realistic reflections and lighting.

Quick Start

Implement a basic scene with ambient and directional lights to demonstrate shadows and an environment map.

Frequently Asked Questions about threejs-lighting

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I set up realistic Three.js lighting for a 3D scene?▼

Realistic Three.js lighting requires combining AmbientLight, DirectionalLight, and PointLight to illuminate scenes, configuring shadow maps, and integrating environment lighting for accurate reflections.

What is the best way to fix shadow artifacts and bias in WebGL rendering?▼

Shadow artifacts in WebGL rendering are fixed by enabling shadows, tuning shadow map resolution, and adjusting bias settings to prevent edge flickering and incorrect dark patterns.

How do I use HDRI environment maps for image-based lighting in Three.js?▼

Image-based lighting in Three.js uses HDRI and cube textures to generate realistic environment maps, providing accurate global illumination and complex surface reflections for 3D meshes.

Does Three.js support multiple light types like SpotLight and RectAreaLight simultaneously?▼

Three.js supports combining multiple light types simultaneously, including SpotLight for focused beams, RectAreaLight for panel lighting, and HemisphereLight for natural sky-ground gradients.

Why does my Three.js point light not illuminate the entire mesh correctly?▼

Point lights have limited range and decay properties; incorrect distance settings or missing shadow map configurations often cause incomplete mesh illumination in Three.js scenes.

What are the performance considerations when using multiple shadows in Three.js?▼

Performance drops when using multiple shadows in Three.js due to expensive shadow map rendering; optimize by reducing shadow map resolution, limiting shadow-casting objects, and tuning bias.

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