USDZ

Definition: USDZ (Universal Scene Description, zipped) is a 3D file format from Apple and Pixar for augmented reality applications on iOS devices. USDZ enables AR Quick Look: users can open 3D models directly in Safari, Mail or Messages and place them in their environment, without installing an app.

In B2B mechanical engineering, companies use USDZ for: AR product demos via email or website, virtual machine placement at the customer site (to check size and space requirements), interactive sales presentations on the iPad and digital booths with AR components.

Advantage: the lowest entry barrier for AR. The customer clicks a link, and the machine appears in AR. No app installation is necessary.

English: USDZ (Universal Scene Description, zipped) German: USDZ-Format, Apple AR-Format

Technology

Universal Scene Description (USD)

USDZ is based on Pixar's USD framework:
- USD: a format to describe 3D scenes (developed for film production)
- USDZ: an uncompressed ZIP archive with USD files + assets
- Content: 3D geometry, materials, textures, animations, audio

Why ZIP: all assets are in one file (easy to share via email or link).

AR Quick Look

An Apple function for instant AR without an app:

Workflow:
1. The customer gets a link to a USDZ file (email, website)
2. iOS detects the USDZ file automatically
3. AR Quick Look opens (the native iOS viewer)
4. The camera starts, and the 3D model is placed in reality

Supported since: iOS 12+ (2018), iPadOS, macOS (preview without AR).

ARKit integration

USDZ is deeply integrated with ARKit:
- Automatic plane detection (floor, walls)
- Size adjustment (scaling)
- Light estimation (the model adapts to the ambient light)
- Object occlusion (the model disappears behind real objects)

Advantage: a more realistic AR view than a simple overlay.

B2B Applications

AR product demos via email

Sales sends the machine model directly:

Workflow:
1. The sales representative sends an email with a USDZ attachment
2. The customer opens the attachment on an iPhone or iPad
3. AR Quick Look starts automatically
4. The customer places the machine (virtually) in the production hall
5. The customer evaluates size, space requirements and integration

Application: packaging machines, CNC milling machines, printing machines, conveyor technology.

Advantage: an instant AR demo, no app installation, also works for short-notice contacts.

Virtual machine placement

The customer checks the placement before the purchase:

Scenario: A customer thinks about buying a large packaging machine.

Problem: Does the machine fit into our hall? Is there sufficient free space for maintenance?

Solution with USDZ:
- A link to the USDZ model on the product page
- The customer opens it on an iPad
- The customer places the machine at true scale in the hall
- The customer walks around the virtual model
- A screenshot for internal coordination

Advantage: the customer makes an informed decision, and uncertainty decreases.

Interactive sales presentations

The sales team uses an iPad with USDZ models:

Application: customer meeting on site, booth, showroom visit.

Workflow:
- Sales shows the product portfolio
- The customer selects a machine of interest
- Show the USDZ model in AR (directly on the table or floor)
- The customer explores the details
- Go through configuration variants (different USDZ files)

Advantage: a more tangible presentation than a catalog or video. The customer "grasps" the machine in space.

Digital booths

Hybrid trade show with AR components:

Application: QR codes at the booth lead to AR models, a digital trade show catalog with AR links, follow-up (follow-up email with USDZ models).

Advantage: visitors take the AR models with them (on their own device). This extends the trade show experience beyond the event.

USDZ vs. Other Formats

USDZ vs. glTF

When to use which: USDZ for iOS AR Quick Look (maximum reach), glTF for web and Android (cross-platform).

USDZ vs. FBX

When to use which: USDZ for iOS AR distribution, FBX for 3D authoring and animation.

USDZ vs. OBJ

When to use which: USDZ for iOS AR, OBJ for general 3D display.

Workflow: CAD → USDZ

Method 1: Reality Converter (Apple)

The official Apple tool (macOS):

Workflow:
1. Export the CAD model as OBJ/FBX/glTF
2. Open Reality Converter (free)
3. Drag the file into it
4. Adjust the materials (PBR)
5. Export as USDZ

Advantage: officially supported, optimized for AR Quick Look.

Download: Apple Reality Converter

Method 2: Blender → USDZ

Open-source workflow:

Workflow:
1. Import the CAD model into Blender
2. Create materials (Principled BSDF = PBR)
3. Export as USDZ (Blender 3.0+ with the USD plugin)
4. Or: export as glTF → Reality Converter → USDZ

Advantage: free, full control over materials and optimization.

Method 3: Reality Composer (Apple)

Authoring tool for AR scenes:

Application: combine several models, add animations, interactive triggers (for example "open the door on tap").

Workflow: 1. Import 3D models (OBJ/USDZ) 2. Arrange the scene 3. Define the behavior (animations, audio) 4. Export as USDZ

Advantage: no-code AR authoring, ideal for complex scenes.

Method 4: Web-based converters

Online tools for quick conversion: - Vectary – online 3D editor with USDZ export - Sketchfab – 3D model hosting with USDZ download

Advantage: no software download is necessary.

Optimization for B2B

Reduce the file size

USDZ is uncompressed → large files:

Problem: a complex machine = 50–200 MB (too large for email).

Solutions:
- Polygon reduction: 100,000–300,000 polygons for mobile AR
- Texture optimization: 2K instead of 4K textures, JPEG instead of PNG
- LOD (level of detail): the detailed version only in close-up view
- Cloud hosting: a link instead of an email attachment (no upload limit)

Realistic materials (PBR)

USDZ supports physically based rendering:

Best practice:
- Metallic-roughness workflow: for realistic metal parts
- Normal maps: details without geometry
- Ambient occlusion: depth in recesses
- Environment maps: reflections of the environment

Result: photorealistic display in AR.

Size and scaling

USDZ models have a defined size:

Important: use the correct units in the CAD export (mm → m conversion).

Example: a packaging machine of 3 m × 2 m × 2 m → it must have the correct scale in USDZ.

Check: AR Quick Look shows the size automatically (for example "3.2 m"). Validate it!

Limitations

Only for iOS/macOS

USDZ works only on Apple devices:
- ✅ iPhone (iOS 12+)
- ✅ iPad (iPadOS)
- ✅ Mac (preview, no AR)
- ❌ Android (not supported)
- ❌ Windows (not supported)

Solution for Android/Windows: glTF + WebXR or a native AR app.

Uncompressed = large files

USDZ does not compress internally:
- CAD export: typically 50–200 MB
- Email limit: usually 25 MB
- Mobile download: slow with a poor connection

Solution: cloud hosting (send a link instead of an attachment) or ZIP compression for the transfer (unzip before AR Quick Look).

No real-time configuration

USDZ is static:
- No dynamic adjustment in AR
- Configuration variants = separate USDZ files

Solution: a native AR app for real configurators (for example with ARKit + Unity).

Frequently Asked Questions (FAQ)

Does USDZ work on Android?

• No. USDZ is exclusive to Apple.
• Alternatives for Android: glTF with WebXR (in the browser), glTF with ARCore (native app), 3D model viewer (Google Scene Viewer).
• Cross-platform strategy: USDZ for iOS users (via AR Quick Look), glTF for Android users (via WebXR or Scene Viewer).
• Statistics: the iOS market share in Germany is ~30%. In B2B environments, it is often higher (iPads for sales).

Can USDZ files contain animations?

• Yes, USDZ supports animations.
• Application: machine movements (for example a packaging machine that shows the production process), interactive triggers (the door opens on tap), product demonstration (automatic animation loop).
• Limitation: complex interactions need a native AR app. AR Quick Look supports only simple animations.

How large can USDZ files be?

• Technically: there is no size limit.
• In practice: <25 MB for sending by email, <50 MB for an acceptable mobile download time, <10 MB is optimal (3G network).
• Optimization: polygon reduction, texture compression, LOD system.
• Alternative: cloud hosting (no download limit, streaming is possible).

What is the difference between USD and USDZ?

• USD: Pixar's Universal Scene Description – a 3D scene format (can be several files).
• USDZ: a ZIP archive with USD files + all assets (textures, audio) in one file.
• Analogy: USD = an HTML website (several files), USDZ = a ZIP archive of the website (everything in one file).
• Use: USDZ for AR Quick Look (one file = easy sharing), USD for complex projects (several organized files).

Can I embed USDZ files on my website?

• Yes, with the <a rel="ar"> HTML tag.
• Code example: html <a rel="ar" href="machine.usdz"> <img src="machine-thumbnail.jpg" alt="View machine in AR"> </a>
• Result: iOS users click the thumbnail → AR Quick Look opens automatically.
• Alternative: the Model Viewer web component (glTF + USDZ at the same time, automatic format selection).

Industry Standards and Tools

USD specification: - Pixar USD – Universal Scene Description - Apple AR Quick Look – iOS AR integration - ARKit – Apple's AR framework

Authoring tools: - Reality Converter – Apple's USDZ converter (macOS) - Reality Composer – AR scene authoring (macOS/iOS) - Blender – open-source 3D with USD plugin - Maya USD Plugin – USD support from Autodesk

Web integration: - Model Viewer – web component for 3D/AR (glTF + USDZ) - AR Quick Look Gallery – AR examples from Apple - Vectary – online 3D editor with USDZ export

Related Topics

AR technologies: - Augmented Reality – AR basics - ARKit – Apple's AR framework - AR Quick Look – iOS AR without an app - WebXR – AR in the browser - Markerless Tracking – SLAM-based AR

3D formats: - glTF – web-optimized 3D format - OBJ – universal 3D format - FBX – Autodesk 3D format - USD – Pixar Scene Description - Collada (DAE) – XML-based 3D

Tools and workflows: - Reality Composer – Apple's AR authoring tool - Reality Converter – USDZ converter - Blender – open-source 3D - WebGL – 3D in the browser - Three.js – WebGL framework

B2B applications: - 3D Product Configurators – configurator systems - Mobile AR – AR on smartphones and tablets - Virtual Placement – size check before the purchase - Product Visualization – 3D display - Immersive Experience – immersive presentation

Materials: - PBR Materials – physically based rendering - Texture Mapping – textures - Normal Maps – detail textures - Environment Mapping – reflections - Material Authoring – material creation