Format

USD

USD (Universal Scene Description) is Pixar's open framework for composing, layering, and exchanging large 3D scenes across pipelines.

Ask the 3D Agent

What is a USD File?

USD (Universal Scene Description) is an open-source framework and file format created by Pixar for describing, composing, and exchanging complete 3D scenes. It goes beyond a single model, letting many artists layer, reference, and override scene data without altering the originals, so large teams can build one world together. USD underpins modern film, visualization, and real-time pipelines, including NVIDIA Omniverse and Apple's AR stack.

How it works

The power of USD comes from its composition system, which assembles a final scene from layers, references, payloads, and variants without changing the source files. It stores data in several file types: human-readable .usda, binary .usdc crate files for speed, .usd for either, and zipped .usdz packages used to deliver AR content on Apple devices. Originally built to manage Pixar's enormous film scenes, USD is now developed openly as OpenUSD with support from Pixar, Apple, NVIDIA, Adobe, and Autodesk. It excels at huge, layered scenes and studio collaboration rather than lightweight single-file delivery.

USD vs glTF

2016 (Pixar)

Open-sourced

.usda, .usdc, .usd, .usdz

File types

AOUSD (2023, Linux Foundation)

Governance

USD

glTF 2.0

Designed for

Composing large multi-tool scenes

Runtime delivery: web, AR, engines

Scene assembly

Layers, references, variants, overrides

Flattened scenes, no composition

File types

.usda, .usdc, .usd, .usdz

.gltf (JSON) or .glb (binary)

Materials

Pluggable: UsdPreviewSurface, MaterialX

PBR metallic-roughness built in

Home turf

Film, VFX, Omniverse, Apple AR

Web viewers, game engines, marketplaces

USD manages the scene while it is being built; glTF ships the finished asset. Author and assemble in USD-speaking tools, then publish a flattened GLB for web and runtime delivery.

In Meshy Every generation exports USDZ, the AR-ready package of USD, so models drop straight into Apple Quick Look and other AR viewers with textures intact; the free File Converter covers wider USD pipelines.

Use cases

Composing and collaborating on large 3D scenes across a studio
Layering and overriding assets non-destructively in a pipeline
Delivering AR content on Apple devices through USDZ

Film Production VFX VR & AR Free 3D Models

Last updated September 14, 2026

Related Tools

3D File Converter

Convert between FBX, OBJ, GLB, STL and more.

Open tool

Online 3D Viewer

View and inspect any 3D file right in your browser.

Open tool

3D File Compressor

Shrink 3D file size without losing visible quality.

Open tool

3D Text Generator

Turn text descriptions into 3D text and shapes.

Open tool

Other terms

USDZ glTF FBX File 3D Rendering Alembic OpenVDB C4D File 3ds file 3MF File

Frequently Asked Questions

USD is an open-source framework and file format, created by Pixar, for describing, composing, and exchanging complete 3D scenes. It lets many artists layer, reference, and override scene data without altering the originals, so large teams can build one world together. USD is now a foundation of modern film, visualization, and real-time pipelines.

USD is used to assemble and manage large, complex 3D scenes across a production, from film and visual effects to architectural visualization and simulation. Its composition system lets studios layer sets, characters, lighting, and effects non-destructively. It also drives platforms like NVIDIA Omniverse and delivers AR content on Apple devices through the USDZ package.

They are all part of the USD family but differ in encoding and purpose. A .usda file is human-readable ASCII, a .usdc file is a compact binary crate for speed, and .usd can be either. A .usdz file is an uncompressed archive that bundles a scene with its textures, used mainly to deliver AR content on Apple devices.

USD is a scene-composition framework built for large, layered productions and studio collaboration, while glTF is a lightweight delivery format often called the JPEG of 3D. USD excels at assembling huge scenes from many referenced and overridden layers, whereas glTF is optimized for compact, fast loading on the web and in engines. USDZ is USD's AR-focused package, a role comparable to GLB for glTF.

FBX is a mature, proprietary Autodesk format aimed at exchanging individual assets like a rigged, animated model between tools. USD is an open framework designed to compose entire scenes non-destructively across a whole pipeline. In practice teams often author assets in tools that use FBX and assemble the full scene in USD.

OpenUSD is the name for the open-source project and community around USD, reflecting its development beyond Pixar. It is now advanced by an alliance including Pixar, Apple, NVIDIA, Adobe, and Autodesk, formed to standardize and grow the format. The goal is a shared, interoperable standard for describing 3D worlds across the industry.

USD is supported by major 3D applications including Maya, Houdini, Blender, and Katana, and it is central to NVIDIA Omniverse. Apple uses the USDZ variant for AR Quick Look across iOS and macOS. Growing adoption across film, design, and real-time tools has made USD a widely shared pipeline standard.

Yes. USD is released by Pixar as free, open-source software with a permissive license, and anyone can use or implement it without fees. Its open development, now under the OpenUSD banner, has driven broad industry adoption. There is nothing to pay to read, write, or build on the format.

Meshy exports directly to USDZ, the AR-ready package of USD, so a generated model can go straight into Apple Quick Look and other AR viewers with its textures intact. Meshy also exports FBX, OBJ, and GLB, and models can be converted to other formats with the free Meshy 3D File Converter for wider USD pipelines. General .usd or .usda scene files are typically produced by importing a Meshy export into a USD-capable tool.

Explore More Features

3D Agent

Chat from an idea, photo, or sketch to a print-ready 3D model

Image to 3D

Turn any photo into a detailed 3D model in seconds

Text to 3D

Describe it, generate it - 3D models from text prompts

AI Texturing

Add realistic PBR textures to any 3D model with AI

AI Image Generator

Generate multi-view images optimized for 3D creation

Animation

Auto-rig and animate any 3D character in seconds

Still have questions about USD?

Ask the Meshy 3D Agent anything about 3D — its built-in knowledge base answers your questions and turns them into models, right in the chat.

Chat with the 3D Agent

USD

What is a USD File?

How it works

USD vs glTF

Use cases