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threejs-lighting

Configure Three.js lighting, shadows, and HDR/cube environment maps via PMREMGenerator for scenes.

Updated May 6, 2026
Search Tags:#performance optimization#threejs#lighting#pbr#shadows#ibl#environment lighting
One-click install
npx skills add https://github.com/Uniquecrete/ThinkFasterv1 --skill threejs-lighting-uniquecrete
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: threejs-lighting
Source: https://github.com/Uniquecrete/ThinkFasterv1/tree/main/Skills/threejs-lighting
Command: npx skills add https://github.com/Uniquecrete/ThinkFasterv1 --skill threejs-lighting-uniquecrete

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

Three.js scenes often look flat or incorrect because lighting, shadows, and environment illumination are configured inconsistently.

Core Features & Use Cases

  • Light type selection: Choose the right Three.js light (Ambient, Hemisphere, Directional, Point, Spot, RectArea) based on desired look and performance.
  • Shadow configuration: Enable and tune renderer and light shadow settings (map sizes, camera frustums, bias) to prevent artifacts like acne and improve realism.
  • Environment lighting (IBL): Apply HDR or cube maps for reflections and overall material response using PMREM for physically based rendering.
  • Performance tuning: Reduce render cost by limiting lights, tightening shadow frustums, and using selective shadow casting/receiving.

Quick Start

Add an AmbientLight and a DirectionalLight to your Three.js scene, then enable shadow maps on the renderer and the lights that should cast shadows.

Frequently Asked Questions about threejs-lighting

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

FAQPage Schema
How do I fix flat Three.js rendering by configuring lights and shadows?▼

To fix flat Three.js rendering, add an AmbientLight and a DirectionalLight, then enable shadow maps on the renderer. Tune light settings and shadow camera bounds to achieve consistent illumination and realistic depth.

What is the best way to set up environment lighting and reflections in Three.js?▼

The best way to set up environment lighting in Three.js is applying HDR or cube maps via PMREMGenerator. This provides accurate image-based lighting (IBL) for realistic reflections and physically based material response.

Why do my Three.js shadows have artifacts and how can I tune them?▼

Three.js shadow artifacts like acne occur from misconfigured shadow settings. Eliminate them by tuning shadow map sizes, adjusting light shadow bias, and tightening shadow camera frustums to improve realism.

Can I optimize Three.js lighting performance for complex scenes?▼

Optimize Three.js lighting performance by limiting active lights, tightening shadow camera frustums, and selectively enabling shadow casting and receiving on specific objects to reduce overall render cost.

How do I choose the right Three.js light type for indoor or outdoor scenes?▼

Choose Three.js light types based on scene context: Hemisphere for outdoor environments, RectArea for studio-style setups, and Point or Spot lights for indoor spaces to match the desired visual look.

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