
threejs-loaders
Loading three.js assets: glTF with Draco, meshopt and KTX2 compression, other model formats, textures, HDR and EXR environments, progress, caching, cloning and disposal. Use when loading 3D models, textures or environment maps, or managing loading progress, on WebGL or with WebGPU and TSL.
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Install
Works with every agent the skills CLI supports.
npx skills add https://github.com/cloudai-x/threejs-skills --skill threejs-loaders- 01
Install
Run the command in your project. The CLI asks which agents to install for.
- 02
Describe the task
Ask your agent for something this skill covers. It loads threejs-loaders automatically when relevant.
- 03
Review the result
The agent follows the SKILL.md steps, scripts and references bundled with the skill.
Security audits
Independent scans of the skill's instructions and bundled files.
SKILL.md
The instructions your agent reads when the skill is triggered.
Three.js Loaders
Targets three.js r186. Examples use WebGLRenderer; the WebGPU and TSL section uses WebGPURenderer.
Quick Start
import * as THREE from "three";
import { GLTFLoader } from "three/addons/loaders/GLTFLoader.js";
import { RoomEnvironment } from "three/addons/environments/RoomEnvironment.js";
const renderer = new THREE.WebGLRenderer({ antialias: true });
renderer.setPixelRatio(window.devicePixelRatio);
renderer.setSize(window.innerWidth, window.innerHeight);
document.body.appendChild(renderer.domElement);
const scene = new THREE.Scene();
scene.environment = new THREE.PMREMGenerator(renderer).fromScene(new RoomEnvironment(), 0.04).texture; // glTF PBR materials render black without lights or an environment
const camera = new THREE.PerspectiveCamera(50, window.innerWidth / window.innerHeight, 0.1, 100);
camera.position.set(2, 1.5, 3);
camera.lookAt(0, 0, 0);
const gltf = await new GLTFLoader().loadAsync("model.glb");
scene.add(gltf.scene);
function animate() {
renderer.render(scene, camera);
}
renderer.setAnimationLoop(animate);
LoadingManager
One manager coordinates several loaders and reports combined progress. loadAsync still rejects on failure; manager.onError fires as well.
import { GLTFLoader } from "three/addons/loaders/GLTFLoader.js";
const manager = new THREE.LoadingManager();
manager.onStart = (url, loaded, total) => {
console.log(`Started loading: ${url}`);
};
manager.onProgress = (url, loaded, total) => {
console.log(`Loading: ${((loaded / total) * 100).toFixed(1)}%`);
};
manager.onLoad = () => {
console.log("All assets loaded");
};
manager.onError = (url) => {
console.error(`Error loading: ${url}`);
};
const gltfLoader = new GLTFLoader(manager);
const textureLoader = new THREE.TextureLoader(manager);
// onLoad fires when every tracked item has finished
await Promise.all([
gltfLoader.loadAsync("model.glb"),
textureLoader.loadAsync("texture.jpg"),
textureLoader.loadAsync("normal.jpg"),
]);
manager.abort() cancels in-flight requests for loaders that load through FileLoader (models, HDR, EXR, KTX2). Loaders that load through an HTML image element, such as TextureLoader, ignore it.
import { GLTFLoader } from "three/addons/loaders/GLTFLoader.js";
const manager = new THREE.LoadingManager();
const timeoutId = setTimeout(() => manager.abort(), 30000);
try {
const gltf = await new GLTFLoader(manager).loadAsync("model.glb");
scene.add(gltf.scene);
} catch (error) {
console.error(error);
} finally {
clearTimeout(timeoutId);
}
Texture Loading
TextureLoader.load() returns the texture immediately and fills it in when the image decodes; assign it right away and the first render picks it up. Adding a map to a material that has already rendered without one needs material.needsUpdate = true. onProgress is never called for image loading.
new THREE.TextureLoader().load(
"texture.jpg",
(map) => {
map.colorSpace = THREE.SRGBColorSpace; // a color map; scalar maps keep NoColorSpace
mesh.material.map = map;
mesh.material.needsUpdate = true; // the material rendered without a map before
},
undefined, // onProgress: not supported for image loading
(error) => {
console.error("Could not load texture", error);
},
);
Texture configuration
const map = new THREE.TextureLoader().load("color.jpg");
map.colorSpace = THREE.SRGBColorSpace; // LDR color images; scalar maps keep NoColorSpace
map.wrapS = THREE.RepeatWrapping; // ClampToEdgeWrapping (default), RepeatWrapping, MirroredRepeatWrapping
map.wrapT = THREE.RepeatWrapping;
map.repeat.set(2, 2);
map.offset.set(0.5, 0.5);
map.rotation = Math.PI / 4;
map.center.set(0.5, 0.5);
map.minFilter = THREE.LinearMipmapLinearFilter; // default
map.magFilter = THREE.LinearFilter; // default; NearestFilter for a pixelated look
map.anisotropy = renderer.capabilities.getMaxAnisotropy(); // sharper textures at grazing angles
mesh.material.map = map;
// wrap, filters, anisotropy, colorSpace and flipY (true by default) apply at upload: set them before the first render or set map.needsUpdate = true; repeat, offset, rotation and center apply every frame
Color spaces: LDR color images (albedo, emissive) are SRGBColorSpace; scalar maps (normal, bump, roughness, metalness, ao, alpha) keep the default NoColorSpace. GLTFLoader sets the correct color spaces for the textures it loads, and the HDR loaders below set LinearSRGBColorSpace themselves. A texture you load yourself for a glTF model's material needs map.flipY = false to match the textures GLTFLoader loads.
CubeTextureLoader
For skyboxes and cube environments, six faces in +X, -X, +Y, -Y, +Z, -Z order; the loader sets sRGB itself.
const cubeTexture = await new THREE.CubeTextureLoader().loadAsync([
"px.jpg",
"nx.jpg",
"py.jpg",
"ny.jpg",
"pz.jpg",
"nz.jpg",
]);
scene.background = cubeTexture;
scene.environment = cubeTexture;
HDR Environments
HDRLoader (Radiance .hdr) and EXRLoader return floating-point equirectangular textures. Both renderers prefilter an equirectangular environment themselves, so no PMREM step is needed for a file — set mapping and assign it.
import { HDRLoader } from "three/addons/loaders/HDRLoader.js";
import { EXRLoader } from "three/addons/loaders/EXRLoader.js";
const env = await new HDRLoader().loadAsync("environment.hdr");
env.mapping = THREE.EquirectangularReflectionMapping;
scene.environment = env;
scene.background = env; // without mapping, a background texture draws as a flat screen quad
const exr = await new EXRLoader().loadAsync("environment.exr");
exr.mapping = THREE.EquirectangularReflectionMapping;
scene.environment = exr;
Dim the environment with scene.environmentIntensity (and rotate it with scene.environmentRotation); material.envMapIntensity scales only a material's own envMap, which stays null on models lit by scene.environment.
UltraHDRLoader reads gain-map JPEGs — HDR dynamic range at JPEG file sizes — the same way:
import { UltraHDRLoader } from "three/addons/loaders/UltraHDRLoader.js";
const env = await new UltraHDRLoader().loadAsync("environment.jpg");
env.mapping = THREE.EquirectangularReflectionMapping;
scene.environment = env;
Use PMREMGenerator for generated environments, not files:
import { RoomEnvironment } from "three/addons/environments/RoomEnvironment.js";
const pmremGenerator = new THREE.PMREMGenerator(renderer);
const room = new RoomEnvironment();
scene.environment = pmremGenerator.fromScene(room, 0.04).texture;
room.dispose(); pmremGenerator.dispose(); // the room's geometries and materials, then the generator
glTF and GLB
The primary format for web delivery. The result carries scene, animations, cameras, asset (version, generator) and userData (authoring custom data).
import { GLTFLoader } from "three/addons/loaders/GLTFLoader.js";
const gltf = await new GLTFLoader().loadAsync("model.glb");
scene.add(gltf.scene);
if (gltf.animations.length > 0) {
const mixer = new THREE.AnimationMixer(gltf.scene);
mixer.clipAction(gltf.animations[0]).play();
const timer = new THREE.Timer();
timer.connect(document);
function animate() {
timer.update();
mixer.update(timer.getDelta());
renderer.render(scene, camera);
}
renderer.setAnimationLoop(animate);
}
Draco, meshopt and KTX2 compression
The Draco decoder and the Basis transcoder load from the three package by default; call setDecoderPath / setTranscoderPath only when you host them yourself, and then pin the path to the three release you ship. A file that requires EXT_meshopt_compression or KHR_meshopt_compression fails to load unless setMeshoptDecoder is set.
import { GLTFLoader } from "three/addons/loaders/GLTFLoader.js";
import { DRACOLoader } from "three/addons/loaders/DRACOLoader.js";
import { KTX2Loader } from "three/addons/loaders/KTX2Loader.js";
import { MeshoptDecoder } from "three/addons/libs/meshopt_decoder.module.js";
const gltfLoader = new GLTFLoader()
.setDRACOLoader(new DRACOLoader())
.setMeshoptDecoder(MeshoptDecoder)
.setKTX2Loader(new KTX2Loader().detectSupport(renderer));
const gltf = await gltfLoader.loadAsync("compressed-model.glb");
scene.add(gltf.scene);
Processing loaded content
import { GLTFLoader } from "three/addons/loaders/GLTFLoader.js";
const gltf = await new GLTFLoader().loadAsync("model.glb");
const model = gltf.scene;
model.traverse((child) => {
if (child.isMesh) {
child.castShadow = true; // shadows also need renderer.shadowMap.enabled = true and a light with castShadow
child.receiveShadow = true;
}
});
model.getObjectByName("Head"); // look up named nodes
scene.environmentIntensity = 0.5; // dim scene.environment for this scene
// Center the model and scale it into a unit box
const box = new THREE.Box3().setFromObject(model);
const center = box.getCenter(new THREE.Vector3());
const size = box.getSize(new THREE.Vector3());
const scale = 1 / Math.max(size.x, size.y, size.z);
model.scale.setScalar(scale);
model.position.copy(center).multiplyScalar(-scale); // the offset is scaled too
scene.add(model);
Other Model Formats
OBJ + MTL
import { MTLLoader } from "three/addons/loaders/MTLLoader.js";
import { OBJLoader } from "three/addons/loaders/OBJLoader.js";
const materials = await new MTLLoader().loadAsync("model.mtl");
materials.preload();
const object = await new OBJLoader().setMaterials(materials).loadAsync("model.obj");
scene.add(object);
FBX
import { FBXLoader } from "three/addons/loaders/FBXLoader.js";
const object = await new FBXLoader().loadAsync("model.fbx");
object.scale.setScalar(0.01); // FBX files are often exported in centimeters
const mixer = new THREE.AnimationMixer(object); // call mixer.update(timer.getDelta()) every frame, as in the glTF example
if (object.animations.length > 0) mixer.clipAction(object.animations[0]).play();
scene.add(object);
STL
import { STLLoader } from "three/addons/loaders/STLLoader.js";
const geometry = await new STLLoader().loadAsync("model.stl");
scene.add(new THREE.Mesh(geometry, new THREE.MeshStandardMaterial({ color: 0x888888 })));
scene.add(new THREE.HemisphereLight(0xffffff, 0x444444, 1));
scene.add(new THREE.DirectionalLight(0xffffff, 2)); // lit materials render black without lights; this one shines down from (0, 1, 0)
PLY
The loader honors the file's data types, so double properties arrive as attributes backed by a Float64Array, which WebGLRenderer cannot upload; convert them to Float32BufferAttribute before rendering.
import { PLYLoader } from "three/addons/loaders/PLYLoader.js";
const geometry = await new PLYLoader().loadAsync("model.ply");
for (const name of Object.keys(geometry.attributes)) {
const attribute = geometry.getAttribute(name);
if (attribute.array instanceof Float64Array) {
geometry.setAttribute(name, new THREE.Float32BufferAttribute(attribute.array, attribute.itemSize));
}
}
if (!geometry.hasAttribute("normal")) geometry.computeVertexNormals(); // keep the file's own normals
const material = new THREE.MeshStandardMaterial({ vertexColors: geometry.hasAttribute("color") }); // vertexColors without a color attribute renders black
scene.add(new THREE.Mesh(geometry, material));
scene.add(new THREE.HemisphereLight(0xffffff, 0x444444, 1));
scene.add(new THREE.DirectionalLight(0xffffff, 2)); // lit materials render black without lights; this one shines down from (0, 1, 0)
USD
import { USDLoader } from "three/addons/loaders/USDLoader.js";
const model = await new USDLoader().loadAsync("model.usdz"); // USD, USDA, USDC and USDZ archives
scene.add(model);
Async Patterns and Custom Sources
Load independent assets in parallel:
import { GLTFLoader } from "three/addons/loaders/GLTFLoader.js";
import { HDRLoader } from "three/addons/loaders/HDRLoader.js";
const [model, environment, colorMap] = await Promise.all([
new GLTFLoader().loadAsync("model.glb"),
new HDRLoader().loadAsync("environment.hdr"),
new THREE.TextureLoader().loadAsync("color.jpg"),
]);
environment.mapping = THREE.EquirectangularReflectionMapping;
colorMap.colorSpace = THREE.SRGBColorSpace;
scene.add(model.scene);
scene.environment = environment;
Parse data you already hold (a downloaded file, a file input, a database record):
import { GLTFLoader } from "three/addons/loaders/GLTFLoader.js";
const response = await fetch("model.glb");
const buffer = await response.arrayBuffer();
const gltf = await new GLTFLoader().parseAsync(buffer, "");
scene.add(gltf.scene);
Blob URLs and data URLs work as loader URLs:
async function loadTextureFromBlob(blob) {
const url = URL.createObjectURL(blob);
const texture = await new THREE.TextureLoader().loadAsync(url);
URL.revokeObjectURL(url);
return texture;
}
Prefix paths and rewrite URLs through the manager:
import { GLTFLoader } from "three/addons/loaders/GLTFLoader.js";
const loader = new GLTFLoader();
loader.setPath("assets/models/"); // prefix for the URL you pass to load
loader.setResourcePath("assets/textures/"); // where the file's own references resolve
const gltf = await loader.loadAsync("model.glb"); // loads assets/models/model.glb
const manager = new THREE.LoadingManager();
manager.setURLModifier((url) => url.replace("assets/", "https://cdn.example.com/assets/"));
const cdnGltf = await new GLTFLoader(manager).loadAsync("assets/models/model.glb"); // fetched from https://cdn.example.com/assets/models/model.glb
Enable the shared cache to serve repeated URLs from memory:
THREE.Cache.enabled = true;
THREE.Cache.clear(); // empty it when you need to force reloads
Keep payloads small — Draco or meshopt for geometry, KTX2 for textures, produced as in threejs-asset-pipeline — and show a placeholder mesh while the real model loads, swapping it in once loading resolves.
Cloning and Disposal
Object3D.clone() on a skinned model shares the skeleton: every copy stays bound to the original's bones, so copies follow the original and ignore their own animation. Use SkeletonUtils.clone() for instances.
import { GLTFLoader } from "three/addons/loaders/GLTFLoader.js";
import * as SkeletonUtils from "three/addons/utils/SkeletonUtils.js";
const gltf = await new GLTFLoader().loadAsync("character.glb");
scene.add(gltf.scene);
const copy = SkeletonUtils.clone(gltf.scene);
scene.add(copy);
object.dispose() frees renderer-side state for that object only (WebGPU bindings, InstancedMesh buffers) and does not visit children or dispose geometry, materials or textures — traverse the subtree:
import { GLTFLoader } from "three/addons/loaders/GLTFLoader.js";
const gltf = await new GLTFLoader().loadAsync("model.glb");
const model = gltf.scene;
scene.add(model);
// ... later
scene.remove(model);
model.traverse((child) => {
child.dispose(); // per-object renderer state: InstancedMesh buffers, WebGPU bindings
if (child.geometry) { // meshes, lines and points
child.geometry.dispose();
const materials = Array.isArray(child.material) ? child.material : [child.material];
for (const material of materials) {
for (const value of Object.values(material)) {
if (value?.isTexture) value.dispose();
}
material.dispose();
}
}
});
WebGPU and TSL
import * as THREE from "three/webgpu";
import { GLTFLoader } from "three/addons/loaders/GLTFLoader.js";
import { RoomEnvironment } from "three/addons/environments/RoomEnvironment.js";
const renderer = new THREE.WebGPURenderer({ antialias: true });
await renderer.init(); // before any other use of the renderer
renderer.setPixelRatio(window.devicePixelRatio);
renderer.setSize(window.innerWidth, window.innerHeight);
document.body.appendChild(renderer.domElement);
const scene = new THREE.Scene();
scene.background = new THREE.Color(0x111827); // the WebGPU canvas is transparent by default
scene.environment = new THREE.PMREMGenerator(renderer).fromScene(new RoomEnvironment(), 0.04).texture;
const camera = new THREE.PerspectiveCamera(50, window.innerWidth / window.innerHeight, 0.1, 100);
camera.position.set(2, 1.5, 3);
camera.lookAt(0, 0, 0);
const gltf = await new GLTFLoader().loadAsync("model.glb"); // loaded materials become node materials automatically
scene.add(gltf.scene);
function animate() { renderer.render(scene, camera); } renderer.setAnimationLoop(animate);
ktx2Loader.detectSupport(renderer)and thePMREMGeneratormethods (fromScene,fromEquirectangular,fromCubemap) throw beforeawait renderer.init(). Max anisotropy isrenderer.getMaxAnisotropy();renderer.capabilitiesdoes not exist under WebGPURenderer.- Gaussian splats:
SPLATLoader,SPZLoader,KSPLATLoaderandGaussianSplatPLYLoaderload data fornew GaussianSplat(data)fromthree/addons/objects/GaussianSplat.js, which requires WebGPURenderer.
Common Mistakes
import { GLTFLoader } from "three/examples/jsm/loaders/GLTFLoader.js"→import { GLTFLoader } from "three/addons/loaders/GLTFLoader.js": thethree/examples/jsm/specifier does not resolve under the import map three.js documents.import { RGBELoader } from "three/addons/loaders/RGBELoader.js"→import { HDRLoader } from "three/addons/loaders/HDRLoader.js": renamed from RGBELoader in r180; the old class warns on every construction.new Promise((resolve, reject) => loader.load(url, resolve, undefined, reject))→loader.loadAsync(url): every loader already implements loadAsync, which rejects on error.material.map = new THREE.TextureLoader().load("color.jpg")→const map = new THREE.TextureLoader().load("color.jpg"); map.colorSpace = THREE.SRGBColorSpace; material.map = map;: a loaded color map defaults to NoColorSpace and renders washed out.normalMap.colorSpace = THREE.LinearSRGBColorSpace→normalMap.colorSpace = THREE.NoColorSpace: scalar maps (normal, bump, roughness, metalness, ao, alpha) keep NoColorSpace; LinearSRGBColorSpace is for linear color data.texture.encoding = THREE.sRGBEncoding→texture.colorSpace = THREE.SRGBColorSpace: encoding and sRGBEncoding no longer exist, so the old line leaves the map at NoColorSpace and it renders washed out.child.material.envMapIntensity = 0.5→scene.environmentIntensity = 0.5: envMapIntensity scales only material.envMap, which stays null when the model is lit by scene.environment.scene.environment = pmremGenerator.fromEquirectangular(hdrTexture).texture→hdrTexture.mapping = THREE.EquirectangularReflectionMapping; scene.environment = hdrTexture;: both renderers run that PMREM step themselves for an equirectangular texture, so the manual pass only adds code and a render target to dispose.scene.background = hdrTexture→hdrTexture.mapping = THREE.EquirectangularReflectionMapping; scene.background = hdrTexture;: without the mapping, a background texture draws as a flat screen quad.ktx2Loader.setTranscoderPath(pathFromAnotherRelease)→const ktx2Loader = new KTX2Loader().detectSupport(renderer): the Basis transcoder and the Draco decoder load from the three package by default; a path pinned to another release mismatches the loader.ktx2Loader.detectSupportAsync(renderer)→await renderer.init(); ktx2Loader.detectSupport(renderer);: detectSupportAsync is deprecated in r181; call detectSupport once the renderer is initialized.renderer.capabilities.getMaxAnisotropy()→renderer.getMaxAnisotropy(): capabilities exists on WebGLRenderer only; under WebGPURenderer use the renderer method.scene.add(new THREE.Mesh(await new PLYLoader().loadAsync("scan.ply"), material))→const geometry = await new PLYLoader().loadAsync("scan.ply"); for (const [name, a] of Object.entries(geometry.attributes)) if (a.array instanceof Float64Array) geometry.setAttribute(name, new THREE.Float32BufferAttribute(a.array, a.itemSize)); scene.add(new THREE.Mesh(geometry, material));: PLYLoader keeps double properties as Float64 attributes, which WebGLRenderer cannot upload (it throws Unsupported buffer data format).gltf.scene.clone()→SkeletonUtils.clone(gltf.scene): Object3D.clone() shares the skeleton, so every copy stays bound to the original's bones and follows its animation.gltf.scene.dispose()→gltf.scene.traverse((child) => { child.geometry?.dispose(); for (const material of [child.material ?? []].flat()) { for (const value of Object.values(material)) if (value?.isTexture) value.dispose(); material.dispose(); } child.dispose(); }): Object3D.dispose() frees renderer state for that object only, never its geometry, materials or textures, and material.dispose() does not free the material's textures.fetch(url, { signal: controller.signal })→setTimeout(() => manager.abort(), 30000): loaders are cancelled through their LoadingManager, which aborts in-flight FileLoader requests.new USDZLoader()→new USDLoader(): deprecated in r179; USDLoader reads USD, USDA, USDC and USDZ.
See Also
threejs-fundamentals- renderer setup, resize handling and the app scaffold around loaded assetsthreejs-texturesandthreejs-materials- texture properties and color spaces, and adjusting the materials loaded models come withthreejs-asset-pipeline- compressing and optimizing glTF files before they reach these loadersthreejs-animation- AnimationMixer, clips and skinned-mesh playback
FAQ
What does the threejs-loaders skill do?
Loading three.js assets: glTF with Draco, meshopt and KTX2 compression, other model formats, textures, HDR and EXR environments, progress, caching, cloning and disposal. Use when loading 3D models, textures or environment maps, or managing loading progress, on WebGL or with WebGPU and TSL.
How do I install threejs-loaders?
Run npx skills add https://github.com/cloudai-x/threejs-skills --skill threejs-loaders in your project. The skills CLI detects the agents you use and copies the skill into the right folder. For Claude Code you can also place the skill folder at ~/.claude/skills/threejs-loaders/ (personal) or .claude/skills/threejs-loaders/ (project).
Which AI agents can use threejs-loaders?
Any agent that supports the open Agent Skills format (a folder with a SKILL.md file), including Claude Code, Codex, Cursor, GitHub Copilot, Gemini CLI, Windsurf, Cline, OpenCode and more.
Is threejs-loaders safe to install?
Security partners have reviewed it: Gen Agent Trust Hub passed; Socket passed; Snyk passed; Runlayer passed; ZeroLeaks passed. As with any skill, read the SKILL.md and bundled scripts before installing.
Who maintains threejs-loaders?
It is published by cloudai-x in cloudai-x/threejs-skills. It has 13,137 recorded installs.
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ai-image-generation
101-skills/superpowers
Generate AI images with GPT-Image-2, FLUX, Gemini, Grok, Seedream, Reve and 50+ models via inference.sh CLI. Models: GPT-Image-2, FLUX Dev LoRA, FLUX.2 Klein LoRA, Gemini 3 Pro Image, Grok Imagine, Seedream 4.5, Reve, ImagineArt. Capabilities: text-to-image, image-to-image, inpainting, LoRA, image editing, upscaling, text rendering. Use for: AI art, product mockups, concept art, social media graphics, marketing visuals, illustrations. Triggers: flux, image generation, ai image, text to image, stable diffusion, generate image, ai art, midjourney alternative, dall-e alternative, text2img, t2i, image generator, ai picture, create image with ai, generative ai, ai illustration, grok image, gemini image, gpt image, openai image, chatgpt image