threejs-lighting

threejs-lighting is a skill for Claude Code, Codex from chadixearth/graphyloop. It costs 35 tokens per session (3,148 once invoked), scanned A, a copy of threejs-lighting, MIT.

A guide to lighting 3D scenes in Three.js, including light types, shadows, and environment lighting.

In plain words
What is it for?
Use it to light 3D objects, add sun or lamp-like shadows, create outdoor lighting, and tune scene illumination.
Why use it?
It helps you choose suitable lights and configure shadows without guessing how each option affects the scene and performance.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

Good fit Use it to light 3D objects, add sun or lamp-like shadows, create outdoor lighting, and tune scene illumination.

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Install with agentmods
npx agentmods add skills/chadixearth/graphyloop/threejs-lighting
Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent
npx skills add chadixearth/graphyloop --skill threejs-lighting
Clone the repo
git clone --depth 1 https://github.com/chadixearth/graphyloop

Made for: Claude Code, Codex.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for threejs-lighting

README.md
[![agentmods](https://agentmods.dev/badge/skills/chadixearth/graphyloop/threejs-lighting/github.svg)](https://agentmods.dev/skills/chadixearth/graphyloop/threejs-lighting)
Your own site
<a href="https://agentmods.dev/skills/chadixearth/graphyloop/threejs-lighting"><img src="https://agentmods.dev/badge/skills/chadixearth/graphyloop/threejs-lighting/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for threejs-lighting

Your own site · 80×15
<a href="https://agentmods.dev/skills/chadixearth/graphyloop/threejs-lighting"><img src="https://agentmods.dev/badge/skills/chadixearth/graphyloop/threejs-lighting.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 35 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 3,148 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin 97% copy Near-identical to another mod in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00035 $0.03148
Opus 5 $0.00017 $0.01574
Sonnet 5 $0.00007 $0.00630
Haiku 4.5 $0.00003 $0.00315

Measured 5d ago against content hash 777875f7d6a7, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade A, and why

threejs-lighting scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 5d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

Origin

This is a copy

97% identical to threejs-lighting — 3 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

skills/threejs-lighting/SKILL.md · 482 lines

How it starts

The opening of the file, as written. The whole thing — 482 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Three.js Lighting

Quick Start

import * as THREE from "three";

// Basic lighting setup
const ambientLight = new THREE.AmbientLight(0xffffff, 0.5);
scene.add(ambientLight);

const directionalLight = new THREE.DirectionalLight(0xffffff, 1);
directionalLight.position.set(5, 5, 5);
scene.add(directionalLight);

Light Types Overview

Light Description Shadow Support Cost
AmbientLight Uniform everywhere No Very Low
HemisphereLight Sky/ground gradient No Very Low
DirectionalLight Parallel rays (sun) Yes Low
PointLight Omnidirectional (bulb) Yes Medium
SpotLight Cone-shaped Yes Medium
RectAreaLight Area light (window) No* High

*RectAreaLight shadows require custom solutions

AmbientLight

Illuminates all objects equally. No direction, no shadows.

// AmbientLight(color, intensity)
const ambient = new THREE.AmbientLight(0xffffff, 0.5);
scene.add(ambient);

// Modify at runtime
ambient.color.set(0xffffcc);
ambient.intensity = 0.3;

HemisphereLight

Gradient from sky to ground color. Good for outdoor scenes.

// HemisphereLight(skyColor, groundColor, intensity)
const hemi = new THREE.HemisphereLight(0x87ceeb, 0x8b4513, 0.6);
hemi.position.set(0, 50, 0);
scene.add(hemi);

// Properties
hemi.color; // Sky color
hemi.groundColor; // Ground color
hemi.intensity;

DirectionalLight

Parallel light rays. Simulates distant light source (sun).

// DirectionalLight(color, intensity)
const dirLight = new THREE.DirectionalLight(0xffffff, 1);
dirLight.position.set(5, 10, 5);

// Light points at target (default: 0, 0, 0)
dirLight.target.position.set(0, 0, 0);
scene.add(dirLight.target);

scene.add(dirLight);

Read the full file on GitHub · 482 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 5d ago First seen · 482 lines · 35 tokens per session scan A 777875f7d6a7

Subscribe to this mod's changes

threejs-lighting is a skill published in the GitHub repository chadixearth/graphyloop (2 stars, last pushed 23d ago), licensed MIT. It adds 35 tokens to every session and 3,148 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 0 findings. It is 97% identical to threejs-lighting, differing in 3 lines, and is treated as a copy.