codepawl/simready-glb

SimReady GLB

Open the 3D viewer to search all 2,595 models and orbit any of them in the browser.

Web-ready glTF binary (.glb) copies of the 3D models in nvidia/simready-assets. Each file loads directly in three.js, Babylon.js, model-viewer or any glTF 2.0 viewer.

Models by NVIDIA SimReady, licensed CC BY 4.0. This dataset converts and compresses them. It does not change what they show. If you use these files, credit NVIDIA as the original author and link the source dataset.

	Blender export	This dataset
Assets	2,595	2,595
Total size	228.1 GB	3.2 GB
Triangles	821M	415M
Largest texture edge	4096 px	1024 px

Example: the V8 engine (engineAssembly_v8_engine_a01) is an 888 MB glb out of Blender and 7.4 MB here. Its first frame in Chrome took 9.4 s before and 0.57 s after.

What is in it

• glb/<asset>.glb: one file per SimReady asset folder, named like the folder in the source dataset.
• thumbs/<asset>.webp: a 512 px render of each glb, with thumbs/metadata.jsonl holding its category, size, triangles and draw calls. The Dataset Viewer above shows this table.
• manifest.jsonl: one line per asset with size, triangles, draw calls and textures before and after optimization.

Download

All files, about 3.2 GB:

hf download codepawl/simready-glb --repo-type dataset --local-dir simready-glb

One category, for example every food model:

hf download codepawl/simready-glb --repo-type dataset --include "glb/food_*" --local-dir simready-glb

One file from Python:

from huggingface_hub import hf_hub_download

path = hf_hub_download("codepawl/simready-glb", "glb/engineAssembly_v8_engine_a01.glb", repo_type="dataset")

Loading in three.js

The geometry uses EXT_meshopt_compression and the textures use EXT_texture_webp, so set the meshopt decoder:

import { GLTFLoader } from 'three/addons/loaders/GLTFLoader.js';
import { MeshoptDecoder } from 'three/addons/libs/meshopt_decoder.module.js';

const loader = new GLTFLoader();
loader.setMeshoptDecoder(MeshoptDecoder);
loader.load('engineAssembly_v8_engine_a01.glb', (gltf) => scene.add(gltf.scene));

Physics and moving parts

2,587 files carry the rigid bodies, mass and physics materials of their SimReady USD. 928 of them also carry joints, 5,546 in all: door hinges, drawer slides, buttons, wheels and lids. Each file holds this data in two forms:

• KHR_physics_rigid_bodies, the Khronos glTF physics extension. Each part has a motion with its mass, center of mass and inertia. Each mesh has a convex hull collider with friction and restitution. Each joint has its limits. Loaders that do not read the extension ignore it.
• Plain node extras, which three.js puts in object.userData. A moving part has joints: [{ type, parent, pivot, axis, min, max, unit }], with the pivot and axis in model space at rest. Revolute limits are in degrees and prismatic limits are in meters. Parts also have mass in kg and density in kg/m³.

Open a door or a drawer in three.js from its rest pose (the part's parent is at the model origin):

import * as THREE from 'three';

function movePart(part, value) {
  const { type, pivot, axis } = part.userData.joints[0];
  const direction = new THREE.Vector3(...axis);
  if (type === 'prismatic') {
    part.position.addScaledVector(direction, value);
    return;
  }
  const turn = new THREE.Quaternion().setFromAxisAngle(direction, THREE.MathUtils.degToRad(value));
  const center = new THREE.Vector3(...pivot);
  part.position.sub(center).applyQuaternion(turn).add(center);
  part.quaternion.premultiply(turn);
}

movePart(gltf.scene.getObjectByName('door_01_obj_00'), 90);

The 3D viewer shows a slider for each moving part. The files from before the physics data are kept at the v1 tag: add --revision v1 to the download command.

How the files were made

1. Download simready_usd/ from each asset folder. source_assets/ is skipped because it holds a second copy of the textures for MDL shaders.
2. Check that .metadata/LICENSE.txt is CC BY 4.0.
3. Import the USD in Blender 5.2 and remove the collision, proxy and grasp helper prims. Export a glb with the original textures.
4. Optimize with glTF Transform 4.5. Remove the USD instance prototypes Blender brings in next to the placed parts, remove duplicate mesh instances, then dedup, prune and weld.
5. Resize textures to 1024 px as WebP. Compress geometry with meshopt at its high level (EXT_meshopt_compression with octahedral normals and quantized attributes).
6. Read the rigid bodies, mass, physics materials and joints from the USD layers and write them into the glb JSON. The USD is Z-up, so joint frames and axes are turned to the glb's Y-up.

Assets with UDIM textures have each tile split into its own material before the export, with its UVs moved into 0-1. Blender's own UDIM handling in the glTF exporter drops the faces of some tiles.

No mesh simplification is applied. The triangle drop comes from removed duplicates and helper geometry.

The conversion scripts are in codepawl/3d-builds.

Known gaps

SimReady collides with signed distance fields built from each render mesh. The glbs use the convex hull of each mesh instead, which every engine can build, so hollow parts such as a cabinet body or a basket collide as if filled. KHR_physics_rigid_bodies is still a Khronos review draft, so check that your engine reads it; the node extras work with any loader. Joint drives and USD simulation settings are not carried over. Materials are converted to glTF PBR, so MDL-only shader effects are lost.

Changelog

• 2026-10-29: Added physics from the USD files: rigid bodies, mass, physics materials and 5,546 joints, as KHR_physics_rigid_bodies and as node extras. The viewer shows a slider for each moving part. The files before this change are at the v1 tag.
• 2026-10-29: Geometry is encoded at meshopt's high level. The set went from 4.0 GB to 3.2 GB with the same triangles and no visible change in any of the 2,595 thumbnails.
• 2026-10-29: 52 files with UDIM textures were missing geometry, because Blender's glTF exporter dropped the faces of some texture tiles (for example crate_plywood_b01 kept only its metal frame). They are exported again with the tiles split before the export.
• 2026-10-29: 1,305 files carried a second copy of some parts at the origin, the USD instance prototypes Blender imports next to the placed parts (for example the eyeglasses showed two pairs of arms). Those copies are removed. Added thumbnails, the Dataset Viewer table and the 3D viewer Space.
• 2026-10-28: first release.