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Three.js Lightingby CloudAI-X

Three.js Lighting Skill.

Make a model readable with a deliberate lighting setup rather than indiscriminate brightness.

  • 3D
  • Three.js
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Source Review · Three.js LightingSKILL.md
Task 3D Produces • A light arrangement with defined roles • Shadow casting and receiving settings • An environment and performance plan Before You Start A working Three.js project and renderer; verify source examples against the installed release. Additional controls and loaders depend on the chosen path.
Editorial summary · source reviewed 2026-10-07 · not a generated example

01 What It Does

Three.js Lighting: Shape Light and Shadows

Light selection, shadow configuration, HDR environments, and practical lighting arrangements.

Source-based workflowNot an execution benchmark

The Working Approach

Three.js Lighting distinguishes ambient, hemisphere, directional, point, spot, and rectangular area lights. These choices differ in directionality, shadow support, material response, and cost. The source also covers environment illumination and studio or outdoor arrangements.

Shadow setup is a chain involving the renderer, light, and objects. Tight coverage and selective casting matter as much as resolution. Some examples use version-specific APIs. Check light types and helper imports against the installed Three.js release before applying them.

Expected Deliverables

  • A light arrangement with defined roles
  • Shadow casting and receiving settings
  • An environment and performance plan
See the Example Brief

From Brief to Review

  1. 01
    Define Light Roles

    Choose fill, directional sunlight, focused lighting, or a studio-like source according to the scene.

  2. 02
    Configure Shadows

    Check renderer, light, and object settings together, then inspect coverage and bias.

  3. 03
    Review the Surface

    Evaluate the intended materials and environment before increasing light count or shadow resolution.

02 When to Use It

When to Use It

A working Three.js project and renderer; verify source examples against the installed release. Additional controls and loaders depend on the chosen path.

A Good Fit

  • Product PresentationA key, fill, and rim relationship can make the object's form readable.
  • Outdoor ScenesDirectional sunlight and hemisphere fill provide a defined daylight starting point.

Limits to Check

  • Unequal Shadow SupportThe source distinguishes lights with native shadows from those needing another solution.
  • Version-Sensitive HelpersAdvanced shadow helpers and imports must be checked against the installed release.

Bring These Inputs

  • Scene ScaleProvide object dimensions and the shadowed region.
  • Material ChoiceIdentify surfaces whose response matters.
  • Lighting ReferenceDescribe the intended studio or outdoor mood.

03 Decisions That Matter

Decisions That Matter

  1. Systematic Shadow Diagnosis

    Checking all participants is more useful than raising map size blindly.

  2. Focused Coverage

    A tightly scoped shadow camera concentrates detail on the useful region.

04 Try a Focused Brief

Try a Focused Brief

The example brief below has not been tested. Check the skill’s setup before using it.

Review the Setup

Use the relevant threejs-skills directory as agent guidance. It is not the Three.js runtime and does not install scene assets.

Upstream Source File
https://github.com/CloudAI-X/threejs-skills/blob/b1c623076c661fc9b03dac19292e825a5d106823/skills/threejs-lighting/SKILL.md

A working Three.js project and renderer; verify source examples against the installed release. Additional controls and loaders depend on the chosen path.

Start With One Deliverable

Adapt the scope, source material and constraints in this brief before running the skill.

Example Brief
Use threejs-lighting to create a restrained studio setup for this product. Explain each light's role, verify material compatibility, and enable only necessary shadows. Check shadow acne (self-shadowing artifacts), detached shadows, and rendering cost before raising resolution.

Inspect the Result

Check the actual output against these observable criteria.

  • Important surfaces remain legible.
  • Shadow settings match the intended casting and receiving objects.
  • Visible artifacts and rendering cost are reviewed.

OpenDesign provides a local design workspace for coding agents. This listing does not mean the skill is bundled or that its external tools, credentials and software dependencies are included.

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05 Source and License

Source and License

This page describes the pinned source revision linked below. Upstream behavior and requirements can change.

Source Owner
CloudAI-X
Repository
CloudAI-X/threejs-skills
Skill File
skills/threejs-lighting/SKILL.md
License
Not confirmed — review the upstream terms before reuse.
Reviewed Snapshot
2026-10-07 · b1c623076c66
Editorial Source Summary
Light selection, shadow configuration, HDR environments, and practical lighting arrangements.

Original summary by OpenDesign, based on the linked source. Repository stars are a dated popularity signal, not skill usage or a quality score.

06 Questions Before You Start

Questions Before You Start

Is environment lighting identical to the background?

No. The source uses separate scene.environment and scene.background assignments.

Is castShadow on the mesh enough?

No. Renderer, light, and receiving surfaces also participate.

Should all lights cast shadows?

The source recommends selective shadow use and limiting light count.

OpenDesign

Make Room for the Next Design Iteration.

Keep your brief, source material and design work together in a local workspace. Check the skill’s own setup before adding it to your workflow.

Download OpenDesignBrowse Design Skills
Upstream Source File
https://github.com/CloudAI-X/threejs-skills/blob/b1c623076c661fc9b03dac19292e825a5d106823/skills/threejs-lighting/SKILL.md