three.js vs. <model-viewer>

Q: How does Needle Engine compare to three.js?

Needle Engine is built on top of three.js. three.js is the WebGL graphics library; Needle Engine is a higher-level realtime engine that adds a component system, lifecycle management, networking, physics, animation and editor integrations with Unity and Blender, so you build interactive apps faster than writing three.js by hand.

Q: How does Needle Engine compare to ?

Google's is a web component for embedding a single 3D model with basic rotation and AR placement via HTML attributes. Needle Engine is for building full interactive 3D/XR applications — configurators, multi-user apps, games — with custom logic, a built-in optimization pipeline and Unity/Blender authoring. Use for simple model display; use Needle when you need real interactivity.

	Web-first runtime integrated with Unity and Blender plugins, complemented by Needle Cloud for optimization and hosting. Needle	Low-level JavaScript library for creating 3D graphics directly in the browser using WebGL. three.js	A Google-developed web component for easily embedding interactive 3D models (glTF/GLB) and AR experiences into HTML pages. <model-viewer>
Core Platform & Workflow
Solution Type	3D Engine Cloud Platform Authoring Tool Optimization Tool Web Component Needle Solution Type: 3d-engine, cloud-platform, authoring-tool, optimization-tool, web-component A comprehensive suite including a runtime engine, cloud services for optimization/hosting, authoring via Unity/Blender plugins, and embeddable web component output. Needle Engine Needle Cloud	3D Engine three.js Solution Type: 3d-engine A foundational JavaScript library providing tools to draw 3D scenes using WebGL. Three.js Website	Web Component <model-viewer> Solution Type: web-component A custom HTML element (<model-viewer>) designed for simple 3D model display and AR. model-viewer Website GitHub
Made for the web	Needle Made for the web: Yes Built from the ground up for the web, focusing on fast loading, efficient rendering, and cross-platform web deployment. Needle Engine Samples	three.js Made for the web: Yes A foundational technology designed specifically for creating 3D graphics on the web.	<model-viewer> Made for the web: Yes Focuses on ease of use, optimized loading (lazy loading, poster), and performance for web display.
Typical Workflows	Unity Editor Blender Editor Code HTML Asset Upload Needle Typical Workflows: Unity Editor, Blender Editor, Code, HTML, Asset Upload Primary workflow involves using Unity or Blender as the authoring environment, exporting scenes and logic. Custom scripts (TypeScript/JavaScript) extend functionality. Needle Engine Samples	Code three.js Typical Workflows: Code Development is code-centric, writing JavaScript to define scenes, materials, and interactions.	HTML <model-viewer> Typical Workflows: HTML Used by adding the `<model-viewer>` tag to an HTML page and configuring via attributes. model-viewer Docs - Getting Started
Use with Unity	Needle Use with Unity: Yes Deep integration with Unity Editor via dedicated plugin, allowing export of scenes, C# scripts (transpiled), materials (Shader Graph), animations, and components. Needle Engine Documentation - Getting Started	three.js Use with Unity: No No direct integration. Solutions like Needle make integrating with three.js seamless.	<model-viewer> Use with Unity: No Consumes glTF files, which can be exported from Unity.
Use with Blender	Needle Use with Blender: Yes Integration with Blender via addon, supporting export of scenes, materials, animations, and custom logic nodes. Needle Engine Documentation - Blender	three.js Use with Blender: No No direct integration. Assets from Blender must be exported (e.g., as glTF) and loaded.	<model-viewer> Use with Blender: No Consumes glTF files, which can be exported from Blender.
Interactivity Building Blocks	Needle Interactivity Building Blocks: Yes Includes a rich set of components for common interactions, animations, and UI elements. Needle Engine Documentation	Limited three.js Interactivity Building Blocks: Limited Three.js provides some built-in interactive components, for example loaders and camera controls, in the examples folder, but they require additional development to be used.	<model-viewer> Interactivity Building Blocks: No Provides built-in features for model display, camera controls, and AR placement, but not for broader interactivity. model-viewer Documentation
Extensible with Coding	Needle Extensible with Coding: Yes Uses TypeScript with full IDE support in both Unity and standalone projects. Needle Engine Documentation - Scripting	three.js Extensible with Coding: Yes Uses JavaScript or TypeScript for all implementation, giving full control but requiring manual coding. Three.js Documentation	<model-viewer> Extensible with Coding: No Allows for JavaScript event handling and basic property manipulation via API, but not for extending core functionality. model-viewer API Reference
Engine Capabilities
Physically-Based Rendering	Needle Physically-Based Rendering: Yes Supports Physically Based Rendering (PBR), custom shaders (via Unity Shader Graph export), lighting, and post-processing effects. Needle Engine Feature Overview	three.js Physically-Based Rendering: Yes Supports PBR materials, various shadow types, post-processing effects, and gives fine-grained rendering control.	Limited <model-viewer> Physically-Based Rendering: Limited Supports PBR materials, environment maps, and basic lighting/shadow options, but no control over per-object shadows, reflection probes, lightmaps or other advanced rendering features. model-viewer Docs - Lighting & Env
Component System	Needle Component System: Yes Leverages the component-based architecture of Unity/Blender, extended with custom web-specific components. Needle Engine Documentation - Scripting	three.js Component System: No Does not enforce an ECS architecture, though one can be implemented on top.	<model-viewer> Component System: No Internal structure, not exposed as an ECS.
Built-in Networking	Needle Built-in Networking: Yes Built-in real-time networking for multiplayer and collaborative applications. Needle Engine Documentation - Networking	three.js Built-in Networking: No Networking capabilities must be added using external libraries.	<model-viewer> Built-in Networking: No Not designed for networked experiences.
Timelines and Sequencing	Needle Timelines and Sequencing: Yes Supports timeline-based sequencing, complex animations, animator state machines, blending, and more.	three.js Timelines and Sequencing: No Basic animation system exists, but no built-in timeline or sequencing system.	<model-viewer> Timelines and Sequencing: No Can play animations embedded in glTF but has no built-in sequencing system. model-viewer Animation
Animation Controls	Needle Animation Controls: Yes Supports complex animations authored in Unity (Animator, Timeline) or Blender and exports them for the web. Needle Engine Feature Overview	three.js Animation Controls: Yes Provides core functionalities for keyframe animation playback and morph targets. Three.js Docs - Animation	<model-viewer> Animation Controls: Yes Can play animations embedded within the loaded glTF model. model-viewer Docs - Animations
Animated Materials	Needle Animated Materials: Yes Supports material animations, shader graph, and procedural material effects.	three.js Animated Materials: No Supports material animation through code, but not for imported assets. Three.js Materials	<model-viewer> Animated Materials: No Supports materials in the glTF, including basic animation defined in the model, but no dynamic material creation or animation.
Audio Playback	Needle Audio Playback: Yes Supports spatial audio configured via Unity/Blender components. Needle Engine AudioSource API	three.js Audio Playback: Yes Includes support for positional audio using the Web Audio API. Three.js Docs - Audio	<model-viewer> Audio Playback: No Does not have built-in audio features.
Video Playback	Needle Video Playback: Yes Supports video textures and playback controlled via components. Needle Engine VideoPlayer API	three.js Video Playback: Yes Supports using HTML video elements as textures. Three.js Docs - VideoTexture	<model-viewer> Video Playback: No Does not directly support video textures.
Physics Integration	Needle Physics Integration: Yes Integrates with physics engines, configured via Unity/Blender components.	three.js Physics Integration: No Requires integration with external physics libraries like Rapier, Cannon.js, or Ammo.js.	<model-viewer> Physics Integration: No Focuses on model display, does not include physics.
glTF 3D Support	Excellent Needle glTF 3D Support: Excellent Uses glTF as its core runtime format and supports import of various formats (FBX, USD, VRM etc.) which are converted. Needle Cloud	three.js glTF 3D Support: Yes Provides robust support for loading and interacting with the glTF 2.0 standard, but some extensions like material animations or physics are missing. Three.js Docs - GLTFLoader	<model-viewer> glTF 3D Support: Yes Designed specifically for loading and displaying glTF 2.0 models.
Custom User Interfaces	Needle Custom User Interfaces: Yes Facilitates creation of UI using standard HTML/CSS and frontend frameworks, integrated with the 3D scene. Needle Engine Documentation - HTML	three.js Custom User Interfaces: No UI creation typically involves integrating with HTML/DOM elements or using external UI libraries, no built-in support in three.js.	<model-viewer> Custom User Interfaces: No Provides basic interaction controls (orbit, pan, zoom) and hotspots. Customization primarily via HTML/CSS/JS API. model-viewer Docs - Controls model-viewer Docs - Hotspots
Web Integration & Deployment
Web Component	Needle Web Component: Yes Exports projects as standard web components (<needle-engine> tag) for easy embedding into any HTML page or web application. Needle Engine Documentation - Web Component	three.js Web Component: No It's a library, not a web component.	<model-viewer> Web Component: Yes It is fundamentally a web component.
PWA Support	Needle PWA Support: Yes Being web-native, Needle Engine projects can be easily included in Progressive Web Apps for offline capabilities and installation.	three.js PWA Support: No As a JavaScript library, it can be used within Progressive Web Apps but provides no PWA features itself.	<model-viewer> PWA Support: No Can be included in Progressive Web Apps but provides no specific PWA features itself.
HTML/CSS Integration	Excellent Needle HTML/CSS Integration: Excellent Designed to seamlessly integrate with HTML, CSS, and frontend frameworks (React, Vue, Svelte etc.), allowing blending of 2D UI and 3D content. Needle Engine Documentation - HTML	three.js HTML/CSS Integration: Yes Integrates with standard HTML/JavaScript workflows, allowing rendering into a canvas element.	Excellent <model-viewer> HTML/CSS Integration: Excellent Designed specifically for seamless integration into standard HTML pages.
Host Anywhere	Needle Host Anywhere: Yes The core runtime can be self-hosted on any static server. Needle Cloud features (optimization, hosting, analytics) require the cloud service. Needle Cloud	three.js Host Anywhere: Yes Applications can typically be hosted on static web servers.	<model-viewer> Host Anywhere: Yes Requires only static hosting for the component and model files.
Asset Hosting	Needle Asset Hosting: Yes Needle Cloud provides managed hosting and CDN delivery for optimized assets. Needle Cloud	three.js Asset Hosting: No Requires external hosting for 3D models and other assets.	<model-viewer> Asset Hosting: No Requires external hosting for the glTF/GLB model files.
App Hosting	Needle App Hosting: Yes Needle Cloud provides managed hosting and CDN delivery for optimized applications. Needle Cloud	three.js App Hosting: No Requires external hosting for the application files.	<model-viewer> App Hosting: No Requires external hosting for the HTML page and model files.
Performance & Optimization
Engine Size	Medium Needle Engine Size: Medium Optimized runtime aims for minimal footprint, size depends on included features.	Small three.js Engine Size: Small The core library has a relatively small footprint, though application size depends on usage.	Small <model-viewer> Engine Size: Small Relatively lightweight as it bundles a subset of three.js.
Loading Performance	Excellent Needle Loading Performance: Excellent Rapid development cycles and fast loading times through optimized runtime and asset handling. Needle Engine Samples	Fast three.js Loading Performance: Fast Core library loads quickly; overall application load time depends heavily on asset sizes and application structure.	Fast <model-viewer> Loading Performance: Fast Implements strategies like lazy loading and posters for optimized loading experience. model-viewer Docs - Loading
Runtime Performance	Excellent Needle Runtime Performance: Excellent Designed for efficient rendering performance across desktop, mobile, and XR devices.	High three.js Runtime Performance: High Offers high performance potential due to its low-level access, but optimization is the developer's responsibility.	Good <model-viewer> Runtime Performance: Good Offers good performance for its primary use case of displaying and interacting with single models.
Smart Asset Optimization	Excellent Needle Smart Asset Optimization: Excellent Needle Cloud provides significant automated optimization: LOD generation, mesh optimization, extensive texture compression (Basis Universal, WebP, JPG, PNG) and resizing options. Needle Cloud	three.js Smart Asset Optimization: No Supports optimized formats like glTF (with Draco compression, KHR texture transforms etc.), but doesn't perform automatic optimization.	<model-viewer> Smart Asset Optimization: Yes Handles progressive loading and encourages use of optimized formats like Draco and Basis Universal textures. model-viewer Docs - Performance
Mesh and Texture LODs	Excellent Needle Mesh and Texture LODs: Excellent Supports automatic mesh simplification, level-of-detail generation and automatic texture compression with multiple quality levels.	three.js Mesh and Texture LODs: No Basic support for mesh LODs, no built-in system for texture LODs. Three.js LOD	<model-viewer> Mesh and Texture LODs: No Relies on optimization being done in the source glTF file; no dynamic LOD system.
XR Support (AR/VR/Spatial)
VR Support (WebXR)	Needle VR Support (WebXR): Yes Supports VR headsets via the WebXR standard. Needle Engine Documentation - XR	three.js VR Support (WebXR): Yes Supports VR experiences through the WebXR API. Three.js Docs - WebXR	Limited <model-viewer> VR Support (WebXR): Limited Supports viewing models in VR via WebXR, without interactivity. model-viewer Docs - Augmented Reality
AR Support (WebXR)	Needle AR Support (WebXR): Yes Supports markerless WebAR on compatible Android devices via the WebXR standard. Needle Engine Documentation - XR	three.js AR Support (WebXR): Yes Supports AR experiences on compatible Android devices through the WebXR API.	Limited <model-viewer> AR Support (WebXR): Limited Provides an AR button for viewing models in AR on compatible Android devices (via WebXR), without interactivity. model-viewer Docs - Augmented Reality
AR Support (iOS)	Needle AR Support (iOS): Yes Supports interactive markerless WebAR on iOS devices via WebXR. Needle Engine Documentation - XR	Limited three.js AR Support (iOS): Limited Limited support for static assets in QuickLook via USDZExporter.	Limited <model-viewer> AR Support (iOS): Limited Provides an AR button for viewing static models in AR on iOS using Apple's AR Quick Look. model-viewer Docs - Augmented Reality
AR Support (visionOS)	Needle AR Support (visionOS): Yes Explicit support for creating spatial computing experiences deployable on visionOS. Needle Engine Samples	Limited three.js AR Support (visionOS): Limited Limited support for static assets in QuickLook via USDZExporter.	Limited <model-viewer> AR Support (visionOS): Limited Provides an AR button for viewing static models in AR on iOS using Apple's AR Quick Look.
AR Tracking Types	Surface Image Needle AR Tracking Types: Surface, Image Supports World Tracking via the WebXR standard on compatible devices. Image tracking is supported on iOS AR but requires a device-specific flag for Android AR. Needle Engine Documentation - XR	Surface three.js AR Tracking Types: Surface Primarily supports World Tracking via the WebXR API.	Surface <model-viewer> AR Tracking Types: Surface Supports World Tracking via WebXR (Android) and surface placement via AR Quick Look (iOS).
Ecosystem & Support
Official Support Availability	Needle Official Support Availability: Yes Dedicated support available for licensed users. Needle Pricing	three.js Official Support Availability: No Support is primarily community-driven.	<model-viewer> Official Support Availability: No Support primarily through GitHub issues and community channels.
Learning Resources	Needle Learning Resources: Yes Extensive documentation, tutorials, live samples, and active community support. Needle Documentation Needle Samples Needle Community Discord	three.js Learning Resources: Yes Vast number of official examples, tutorials, books, and community resources available. Three.js Examples	Good <model-viewer> Learning Resources: Good Excellent documentation site serves as the primary learning resource. model-viewer Documentation
License	Commercial Needle License: Commercial Commercial license required for full features and deployment. Free evaluation available. Needle Pricing	Open Source three.js License: Open Source Available under the permissive MIT license. Three.js License	Open Source <model-viewer> License: Open Source Available under the Apache License 2.0. GitHub License

Frequently asked questions

chevron_right

How does Needle Engine compare to three.js?

Needle Engine uses three.js as its underlying rendering library. Think of Three.js as the graphics system, while Needle Engine is a realtime engine built on top of it, adding interactive components, lifecycle management and many other features needed to create interactive 3D applications.

	Needle Engine	Three.js
Relationship	Higher-level runtime built on top of three.js	WebGL graphics library
Tooling	Integrations with Unity & Blender; visual setup; component management	Manual scene construction in JavaScript
Workflow	Combines visual editing in Unity or Blender with fast iteration times, hot reloading and other modern web development features	Code-driven workflow
Scripting	Typescript or Javascript; Component System with event hooks and lifecycle management	Manual event loop management
Engine Features	Integrated networking, physics, animation and sequencing, audio, video, optimizations, etc.	Requires integrating separate libraries or custom code
Target Audience	Creators using Unity or Blender for rapid web app development; web developers looking to enhance their web applications with interactive 3D content; experienced three.js developers that want to save time and leverage best practices	Developers building 3D experiences from scratch in code

chevron_right

How does Needle Engine compare to <model-viewer>?

<model-viewer> is a web component designed by Google for easily embedding 3D models with basic AR viewing capabilities directly into HTML pages. Both Needle Engine and <model-viewer> aim to simplify bringing 3D content to the web, with Needle focusing on building complete interactive applications and <model-viewer> concentrating on straightforward model display and basic AR.

	Needle Engine	<model-viewer>
Primary Focus	Building interactive 3D/XR applications, including advanced product viewers.	Displaying static or simply animated 3D models; basic product viewers.
Use Case	Interactive configurators, virtual tours, product viewers, multi-user apps, web games, XR apps, educational apps.	Basic product previews, simple educational models, basic AR object placement.
Interactivity	High: Designed for complex interactions, custom logic, UI, animations, physics.	Limited: Primarily model rotation, scaling, basic animation playback, AR placement.
Optimization & Loading	Built-in Optimization Pipeline: Smart export, instancing, optional Needle Cloud automation (LODs, compression), Progressive Loading support for fast initial view.	Relies on manually pre-optimized assets; Browser caching. No built-in progressive loading logic within the component itself.
Workflow	Leverage Existing Tools: Use Unity/Blender to design scenes & interactivity.	Declarative HTML: Configure display options via HTML attributes on the component.
iOS AR	Export Interactive USDZ: We generate USDZ with interactivity for iOS Quick Look.	Displays USDZ: Can load existing static/basic-animated USDZ for iOS AR Quick Look.
Scene Complexity	Handles complex scenes with multiple objects, interactions, logic.	Best suited for displaying single models or simple arrangements.
Customization	Extensive: Full control over rendering (three.js), logic, UI integration.	Moderate: Customization via attributes, CSS, and limited JavaScript API.

chevron_right

What is Needle Engine?

Needle Engine is a web-first realtime engine built on three.js that lets you create interactive 3D and XR experiences using standard web technologies. It integrates with Unity and Blender for authoring, exports to glTF and JavaScript/TypeScript, and is optimized for fast loads and small builds.

chevron_right

How does Needle Engine work with Unity?

Design scenes and logic in the Unity Editor and export to the web with a fast iteration workflow. Needle translates supported Unity features to web standards like glTF and JavaScript, so your content runs natively in the browser without WebGL player overhead.

chevron_right

How does Needle Engine work with Blender?

Use Blender to author assets and scenes, then export to glTF and run them with Needle Engine on the web. The pipeline focuses on PBR, lightmaps, instancing, and other optimizations so your Blender projects load quickly and look great online.

chevron_right

How is pricing structured?

Needle offers a free tier for evaluation and non-commercial use and paid tiers per seat for commercial use, team features, and support. Educational licenses are available. See the Pricing page for details.

chevron_right

Does Needle Engine support AR on iOS?

Yes. Needle can generate USDZ for iOS Quick Look to place models in AR, and it supports WebXR where available for on-the-web AR. Choose the best option per device and use case.

chevron_right

Does Needle Engine support VR and WebXR?

Yes. Needle Engine is built for the web and supports WebXR for VR headsets and compatible browsers, so you can build immersive experiences that run natively without plugins.

chevron_right

Do I need Needle Cloud to host my projects?

No. You can self-host any Needle project as a static site or integrate it into your web app. Needle Cloud is an optional service for automation, optimization, and collaboration that makes shipping and updating projects easier.

Save your rendering changes?

Needle vs. three.js vs. <model-viewer>

Frequently asked questions