threejs-core-renderer

threejs-core-renderer is a skill for Claude Code, Codex from Impertio-Studio/Three.js-Claude-Skill-Package. It costs 123 tokens per session (2,771 once invoked), scanned A, original, MIT.

A guide to creating and configuring the Three.js renderer, the part that draws a 3D scene in a web browser. It covers the render loop, resizing, colour handling, tone mapping, and shadows.

In plain words
What is it for?
Use it when starting a Three.js application, configuring WebGL rendering, setting up render targets, or managing the animation loop and browser resize.
Why use it?
It helps avoid blurry or incorrectly coloured output, excessive pixel-ratio costs, broken resizing, and missing shadows.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one. Also seen: mentions Claude Code.

Good fit Use it when starting a Three.js application, configuring WebGL rendering, setting up render targets, or managing the animation loop and browser resize.

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Install with agentmods
npx agentmods add skills/impertio-studio/three.js-claude-skill-package/threejs-core-renderer
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 Impertio-Studio/Three.js-Claude-Skill-Package --skill threejs-core-renderer
Clone the repo
git clone --depth 1 https://github.com/Impertio-Studio/Three.js-Claude-Skill-Package

Made for: Claude Code, Codex.

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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.

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README.md
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<a href="https://agentmods.dev/skills/impertio-studio/three.js-claude-skill-package/threejs-core-renderer"><img src="https://agentmods.dev/badge/skills/impertio-studio/three.js-claude-skill-package/threejs-core-renderer.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 123 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,771 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 original No closer match found 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 $0.00123 $0.02771
Opus 5 $0.00062 $0.01385
Sonnet 5 $0.00025 $0.00554
Haiku 4.5 $0.00012 $0.00277

Measured 9d ago against content hash ee5b1ace6f0d, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade A, and why

threejs-core-renderer 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 9d 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.

skills/source/threejs-core/threejs-core-renderer/SKILL.md · 316 lines

How it starts

The opening of the file, as written. The whole thing — 316 lines — stays where its author put it; the contents beside it link to each section on GitHub.

threejs-core-renderer

Quick Reference

Standard Initialization Pattern

import {
  WebGLRenderer, SRGBColorSpace, ACESFilmicToneMapping,
  PCFSoftShadowMap, PerspectiveCamera, Scene
} from 'three';

const renderer = new WebGLRenderer({ antialias: true });
renderer.setSize(window.innerWidth, window.innerHeight);
renderer.setPixelRatio(Math.min(window.devicePixelRatio, 2));
renderer.outputColorSpace = SRGBColorSpace;
renderer.toneMapping = ACESFilmicToneMapping;
renderer.toneMappingExposure = 1.0;
renderer.shadowMap.enabled = true;
renderer.shadowMap.type = PCFSoftShadowMap;
document.body.appendChild(renderer.domElement);

const scene = new Scene();
const camera = new PerspectiveCamera(50, window.innerWidth / window.innerHeight, 0.1, 1000);

renderer.setAnimationLoop((time) => {
  renderer.render(scene, camera);
});

Constructor Parameters

Parameter Type Default Description
canvas HTMLCanvasElement new canvas Existing canvas element
context WebGLRenderingContext new context Existing WebGL context
precision 'highp' | 'mediump' | 'lowp' 'highp' Shader precision
alpha boolean false Transparent canvas background
premultipliedAlpha boolean true Premultiplied alpha blending
antialias boolean false MSAA anti-aliasing
stencil boolean true Stencil buffer
preserveDrawingBuffer boolean false Required for screenshots
powerPreference 'high-performance' | 'low-power' | 'default' 'default' GPU selection hint
failIfMajorPerformanceCaveat boolean false Fail if software renderer
depth boolean true Depth buffer
logarithmicDepthBuffer boolean false Fix Z-fighting for large scenes

NEVER change antialias after construction -- it CANNOT be modified post-creation.

Key Properties

Property Type Default Description
domElement HTMLCanvasElement -- The canvas. ALWAYS append to DOM
shadowMap.enabled boolean false MUST set true for any shadows
shadowMap.type ShadowMapType PCFShadowMap Shadow filtering algorithm
toneMapping ToneMapping NoToneMapping HDR tone mapping algorithm
toneMappingExposure number 1 Exposure for tone mapping
outputColorSpace string SRGBColorSpace Output color space
autoClear boolean true Clear before each render call
sortObjects boolean true Automatic draw order sorting
clippingPlanes Plane[] [] Global clipping planes
localClippingEnabled boolean false Enable per-material clipping
info object -- Render stats (calls, triangles, memory)

Read the full file on GitHub · 316 lines

Files

What ships with it

4 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

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. 9d ago First seen · 316 lines · 123 tokens per session scan A ee5b1ace6f0d

Subscribe to this mod's changes

threejs-core-renderer is a skill published in the GitHub repository Impertio-Studio/Three.js-Claude-Skill-Package (13 stars, last pushed 2mo ago), licensed MIT. It adds 123 tokens to every session and 2,771 once invoked, about $0.0006 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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