Full-stack-skills threejs-scenes

three.js Scene graph root object, linear Fog and exponential FogExp2, Scene.background for solid colors or textures, and high-level environment background concepts that tie to PMREM and loaders in other skills. Use when configuring world container, atmospheric fog, or background; for HDR env map file loading use threejs-loaders; for GPU texture settings after load use threejs-textures; for tone mapping use threejs-renderers.

install

source · Clone the upstream repo

git clone https://github.com/partme-ai/full-stack-skills

Claude Code · Install into ~/.claude/skills/

T=$(mktemp -d) && git clone --depth=1 https://github.com/partme-ai/full-stack-skills "$T" && mkdir -p ~/.claude/skills && cp -r "$T/skills/threejs-skills/threejs-scenes" ~/.claude/skills/partme-ai-full-stack-skills-threejs-scenes && rm -rf "$T"

manifest: skills/threejs-skills/threejs-scenes/SKILL.md

When to use this skill

ALWAYS use this skill when the user mentions:

```
Scene
```
as root,
```
scene.background
```
, environment or skyball setup at scene level
```
Fog
```
or
```
FogExp2
```
parameters (
```
near
```
,
```
far
```
,
```
color
```
, density) and interaction with camera far plane
Organizing render lists conceptually (children of scene)

IMPORTANT: scenes vs textures vs loaders

Concern	Skill
Scene + fog API	threejs-scenes
Texture sampling, PMREM generator usage	threejs-textures
Fetching HDR/glTF	threejs-loaders

Trigger phrases include:

"Scene", "Fog", "FogExp2", "background", "雾"
"场景根节点", "线性雾", "指数雾"

How to use this skill

Instantiate
```
Scene
```
and add lights/meshes/cameras as children per graph rules (threejs-objects).
Choose fog: linear
```
Fog
```
vs exponential
```
FogExp2
```
for outdoor/horizon feel.
Tune fog
```
near
```
/
```
far
```
alongside camera
```
far
```
to avoid clipping artifacts.
Set
```
scene.background
```
to
```
Color
```
,
```
Texture
```
, or cube map per docs; env lighting still needs matching renderer/material settings.
When user wants IBL from HDR file, point to loaders → textures → materials pipeline explicitly.
Document that fog does not replace frustum culling for performance.

Example: Scene with fog and background

import * as THREE from 'three';

const scene = new THREE.Scene();
scene.background = new THREE.Color(0xa0a0a0);

// Linear fog — match color with background to hide horizon seam
scene.fog = new THREE.Fog(0xa0a0a0, 10, 50);

// Ensure camera far plane covers fog range
camera.far = 60; // slightly beyond fog far
camera.updateProjectionMatrix();

See examples/workflow-fog-background.md.

Doc map (official)

Docs section	Representative links
Scenes	https://threejs.org/docs/Scene.html
Fog	https://threejs.org/docs/Fog.html
FogExp2	https://threejs.org/docs/FogExp2.html

Scope

In scope:
```
Scene
```
, fog types, background field semantics at API level.
Out of scope: HDR / glTF file fetch (threejs-loaders); PMREM and texture sampling (threejs-textures); tone mapping / output color space defaults (threejs-renderers); full-screen fog-only post stack (threejs-postprocessing) unless tying to scene
```
Fog
```
; custom atmospheric scattering shaders beyond core fog API.

Common pitfalls and best practices

Fog color should harmonize with background to hide the horizon seam.
Very large
```
far
```
on camera with fog still needs scene scale consistency.
```
background
```
rotation/intensity features depend on renderer version—cite current docs.

Documentation and version

Scene

Fog

, and background fields are documented under Scenes in three.js docs. Environment-related visuals often combine this skill with threejs-textures (PMREM) and threejs-loaders (HDR files) — link those pages when the user moves from “fog color” to “HDR sky”.

Agent response checklist

When answering under this skill, prefer responses that:

Link
```
Scene
```
,
```
Fog
```
, or
```
FogExp2
```
official pages.
Relate fog distances to threejs-camera
```
far
```
plane and world scale.
Defer PMREM/HDR file steps to threejs-textures / threejs-loaders with one sentence each.
Avoid duplicating full color-management tutorials — point to renderer + textures skills.

Keywords

English: scene, fog, fogexp2, background, environment, three.js

中文： 场景、雾、Fog、背景、环境、three.js