X3D Resources

Extensible 3D (X3D) Graphics is the royalty-free open standard for publishing, viewing and archiving interactive 3D models on the Web.

Applications | Authoring Tools | Authoring Support | Books | Conformance | Conversions | Examples | Export | Feedback | License | Mobile | Model Search | PowerPoint | Quality Assurance (QA) | References | Security | Showcase | Tooltips | Training and Tutorials | Videos | VRML and Open Inventor | Wish List | X3D‑Edit | X3D Scene Authoring Hints | Contact

Numerous resources are available to support both X3D Graphics and its compatible predecessor, the Virtual Reality Modeling Language (VRML).

Applications, Players and Plugins for X3D / VRML Viewing

Extensible 3D (X3D) is the third-generation successor to the Virtual Reality Modeling Language (VRML), providing full backwards compatibility and adding functionally equivalent XML and compressed-binary file encodings.

• Player support for X3D components provides a feature comparison of major X3D viewers, for each player and each X3D component.
• A simple example test scene is HelloWorld.x3d provided in a variety of X3D encodings and conversions:
  (.x3d XML, .x3dv ClassicVRML, .wrl VRML97, .html listing, .html Cobweb, .xhtml X3DOM, .json JavaScript Object Notation, .x3db compression, C14N canonicalization, and .png image)
• The HelloWorld.x3d scene is a simple authoring example that illustrates the minimalist X3D Interchange profile. Also available: internationalized Hello World Scenes.
• Please install one of the following X3D players to view X3D/VRML scenes and browse these examples.

X3D players and plugins from Web3D Consortium members:

1. InstantReality is a high-performance X3D player and Mixed Reality (MR) system by Fraunhofer IGD (Linux, MacOSX, Windows) (forum).
2. Special mention. X3DOM (pronounced "X-Freedom") implements a high-performance X3D player in open-source JavaScript. Authors can publish X3D source within an HTML5 page that works with Web browsers without prior plugin installation (get involved and forum).
3. FreeWRL/FreeX3D X3D/VRML browser (open-source C). (Linux, MacOSX, Windows) (contact, (bug tickets). Also described on Wikipedia.
4. H3D/H3DViewer is an open-source C++ API and X3D player (Linux, MacOSX, Windows) (forum).
   • Includes haptics support, Rigid Body Physics component, plus 3D texturing and the Volume Visualization component for the Medical Working Group.
5. Xj3D is an open-source Java viewer and application codebase for X3D graphics scenes.
   • Xj3D Evolution strategy describes how Web3D working-group stakeholders are implementing further improvements to Xj3D.
   • NPS source branch for Xj3D viewer describes current details for the active Xj3D Sourceforge project.
   • Xj3D.org original distribution includes a developer page.
6. GeoVrml Run-Time was originally used for VRML97 GeoVrml examples.
7. Dynamic-3D is a pure Java-based 3D Graphics Engine for web browsers. Open source renderer by Mitch Williams.

Other X3D players, not (yet?) Web3D Consortium members:

8. BitManagement's BS Contact and BS Contact Geo X3D/VRML97 plugins for HTML web browsers (Linux, MacOSX, Windows) (support).
9. Castle Game Engine is used to build view3dscene, a free cross-platform VRML/X3D browser that also supports other 3D model formats (FreeBSD, Linux, MacOSX, Windows) (forum).
10. Cobweb X3D Browser implements a high-performance X3D player in open-source JavaScript. Authors can publish X3D source within an HTML5 page that works with Web browsers without prior plugin installation.
11. Cortona3D Viewer by Parallel Graphics, VRML plugin for Netscape or Internet Explorer (support).
12. GPAC is an Open Source multimedia framework for presentation technologies (graphics, animation and interactivity) and packaging formats such as MP4. (Linux, MacOSX, Windows).
13. Heilan X3D Browser open-source C++ browser for audio research (Linux, MacOSX, Windows).
14. libx3d open-source C++ libraries for X3D.
15. NuGraf by Okino provides a 3D rendering, translation, viewing & data optimization system (Windows + emulators and plugins for other authoring tools) (support).
16. Octaga Player 5.0 (and Octaga-only plugin test page) by Octaga VS is a high-performance X3D/VRML browser (Windows) (support). Downloads of prior Octaga Player 2.1 also available at c|net.
17. OpenVRML is a free cross-platform runtime for VRML and X3D (FreeBSD, Linux, MacOSX) (support).
18. Orbisnap is a free multi-platform standalone VRML97 viewer for visualizing virtual worlds, and can connect to a Simulink 3D Animation server (FreeBSD, MacOSX, Linux, Unix) (support).
19. SwirlX3D Free Player by Pine Coast Software (Windows) (support).

Legacy and unsupported X3D players:

20. blaxxun Contact VRML97 plugin for Netscape or Internet Explorer, and Matlab plugin (not supported).
21. CosmoPlayer was created by Silicon Graphics Inc. (SGI) (not supported)
    • Karmanaut mirror site: CosmoPlayer 2.1.1 VRML97 plugin for Netscape or Internet Explorer.
    • CosmoPlayer VRML Plugin Installer distributed by NIST.
    • Original link: CosmoPlayer 2.1.1 VRML97 plugin for Windows/Mac/Irix, running under Netscape or Internet Explorer.
    • Archive link: CosmoPlayer 2.1.1 VRML97 plugin for Windows/Mac/Irix, running under Netscape or Internet Explorer.
    • Karmanaut mirror site: CosmoPlayer 2.1.1 VRML97 plugin for Netscape or Internet Explorer.
22. Vivaty was the successor to MediaMachines, with eventual acquisitions by Platinum, Computer Associates and Microsoft. (corporate history)
    • Flux Player and Flux Studio X3D/VRML97 viewer plugin and authoring tool for Internet Explorer (Windows) (not supported). Also includes download links to Nexternet Pivoron player.
    • Flux open-source early release for VRML and X3D, removed by project committers (Windows, Internet Explorer and Firefox). Sourceforge changed their policy after this incident to eliminate such removals from occurring again. Thanks to another contributor, this original early-release codebase is again available.
    • Vivaty (formerly Flux) Player X3D/VRML97 plugin for Internet Explorer (Windows) (not supported).
    • Pivoron plugin for Netscape or Internet Explorer (release plans) from Nexternet which was acquired by MediaMachines in 2001. Not supported.

Authoring Tools and Programming Libraries for X3D Scenes

Many authoring tools have emerged since X3D can be used for any purpose without royalty fees.

Tool support for X3D components provides a feature comparison of major X3D authoring tools, for each player and each X3D component.

1. X3D-Edit is the primary authoring tool used at NPS to create the X3D, Sourcebook and Savage example archives. Available free.
   • Latest version. X3D-Edit is available for Windows, MacOSX, Linux, Solaris and Netbeans users (support).
   • Original version. X3D-Edit 3.1 is still available but no longer supported. X3D-Edit Authoring Tool for Extensible 3D (X3D) Graphics provides a 7-page summary of X3D-Edit 3.1 features and usage.
2. AC3D is a small, simple, easy-to-learn 3D authoring tool that includes support for X3D export (Linux, MacOSX, Windows) (contact).
3. Blender is an open-source 3D authoring tool that includes support for X3D import/export (FreeBSD Linux, MacOSX, Windows) (download).
   • Blender has many import/export capabilities. Blender Model Export To X3D using X3D-Edit describes an example design & export session in detail.
   • BitManagement X3D exporter
   • Further notes and improvements on Blender export to X3D are provided by Kambi modifications to Blender X3D exporter
4. BS Content Studio Tool for easy and fast creation of 3D scenes and applications, from BitManagement (support) November 2014: new update announced.
5. BS Editor is the original authoring tool from BitManagement.
6. insight3d is an open-source, image-based modeling tool for creation of buildings from photographs.
7. MeshLab is an open-source, portable, and extensible system for the processing and editing of unstructured 3D triangular meshes.
8. ParaView is a parallel visualization application to visualize large data sets.
9. RawKee X3D Exporter Plug-in for Maya by Aaron Bergstrom
10. Rez provides an open-source framework and tools for translating planetary terrain data and images to different formats including multi-resolution versions optimized for web browsing.
11. SwirlX3D Editor is an X3D/VRML authoring environment from Pinecoast Software (Windows) (support).
12. Seamless3d is open-source 3D modeling software designed for artists (support).
13. SubmarineX3D is a simple X3D Editor from University of Perugia Italy (Linux, MacOSX, Windows) (contact).
14. Titania X3D Editor is a free standalone X3D/VRML authoring tool primary developed for Ubuntu/Debian operating system.
15. VIM (Vi IMproved) Editor does syntax highlighting and folding (collapsing of blocks) for both XML and VRML97. Nothing specific for X3D yet.
16. Viper is a VRML97 source-code parser by NIST.
17. VrmlPad is a professional editor for VRML programming.
18. Visualization Toolkit (VTK) is an open-source toolkit, written in C++, for large scale 3D data visualization that offers X3D export. Related: Mayavi is a Python interactive scripting interface for VTK that includes X3D export of mesh-based surfaces.
19. White Dune is a graphical VRML97/X3D editor, simple NURBS/Superformula 3D modeller, animation tool, and VRML97/X3DV command-line compiler in development. (FreeBSD, MacOSX, Linux, Unix, Windows).
20. Wings 3D is an advanced subdivision modeler that is both powerful and easy to use. It can be used as a free open-source X3D/VRML authoring environment (Linux, MacOSX, Windows) (forum).
21. Open-Source 3D Component Editor using X3DOM by Fraunhofer IGD is an example X3D scene editor that runs in a web browser.
22. XMLSpy by Altova is an XML development environment for modeling, editing, debugging and transforming XML technologies. The X3D-Edit distribution enables XMLSpy support for X3D editing and validation, using either X3D DTD or schema.
    • X3D-XmlSpyProject.spp (online) is an overview project for X3D specification-development work
    • ContentCatalog.spp project files are provided with each example archive
23. X3D Java Scene Access Interface (SAI) Library provides standard X3D Java interfaces with concrete implementation classes, all as open source. This application programming interface (API) library is strongly typed to avoid authoring errors, and is autogenerated from the X3D XML schema and X3D Object Model to ensure correctness.

Legacy and unsupported X3D authoring tools:

24. Octaga Exporter directly exported visual effects created using Autodesk 3DS Max into VRML and X3D.
25. Vapour Technology: VRML Authoring Tools for computing orientations (Dizzy, Peek, SpinDoctor and Twister)
26. Vivaty Studio (formerly Flux Studio and VizX3D) is a high-quality authoring tool from Vivaty. It is an easy-to-use, inexpensive, general-purpose, visually oriented, 3D modeling and animation application for X3D (not supported). This group also produced Flux Player and Flux Studio X3D/VRML97 viewer plugin and authoring tool for Internet Explorer (Windows) (not supported).

Authoring Support for X3D

Numerous other resources provide support for authoring X3D.

• X3D Scene Authoring Hints provides author guidance for producing X3D scenes.
• Authoring templates: newScene.x3d, newScene.x3dv, newScene.wrl, .html listing, .html Cobweb, .xhtml X3DOM, newScene.json, newECMAscript.js and NewX3dScript.java
• HTML page with embedded X3D using X3DOM: newScene.xhtml (no plugin required!)
• HTML Object Tag for X3D shows how to place X3D objects within an HTML page
• newHtmlPageWithX3dObject.html is an example HTML scene with X3D object tag to copy, edit and reuse.
• X3D Recommended Standards include:
  • X3D v3.3 Abstract Specification (Architecture and Base Components) (node index) authoritatively describes the functionality of all X3D nodes and elements.
  • The X3D Current Standards and All X3D Recommended Specifications pages includes all approved documents, downloads, and related links.
  • X3D XML encoding describes the .x3d file syntax.
  • Humanoid animation (H-Anim) specification version 1.0 describes the full semantics of H-Anim models that are summarized in the X3D Abstract Specification.
  • X3D ECMAscript language binding describes JavaScript syntax for the Script node, referenced by the X3D specifications.
  • X3D-Edit also bundles X3D, VRML97 and H-Anim specifications in the Help system.
  • ECMA-262 ECMAscript Language Specification defines JavaScript syntax and functionality.
  • ECMA-404 JavaScript Object Notation (JSON) Data Interchange Format describes JavaScript syntax for JSON data structures.
  • You can search ISO.org if you prefer to buy a copy of any specification from the International Standards Organization (ISO). Incidentally, the VRML Consortium (our direct predecessor) was the first standards-development organization (SDO) permitted by IS to independently publish Web standards without charge.
• X3D Specifications: XML Schema and DOCTYPE Validation: selected assets
  • X3D Graphics Standards: Specification Relationships diagram (.pdf) and the X3DSpecifications Honeycomb Diagram show how this large family of X3D standards fit together.
  • X3D Node Inventory Comparison (.pdf) shows current implementation coverage of the X3D Abstract Specification, X3D Schema, X3D DOCTYPE, X3D-Edit, X3DOM, and VRML97 node sets
  • X3D v3.3 Doctype Documentation and X3D v3.3 Schema Documentation (.zip) for International Standard (IS), produced by Web3D Consortium members and approved by national bodies for ISO standardization
  • X3D v3.2 Doctype Documentation and X3D v3.2 Schema Documentation (.zip)
  • X3D v3.1 Doctype Documentation and X3D v3.1 Schema Documentation (.zip)
  • X3D v3.0 Doctype Documentation and X3D v3.0 Schema Documentation (.zip)
  • OasisXmlCatalogX3D.xml provides schema and doctype address resolution for typical offline validation of X3D scenes.
  • Production notes: X3D DTD documentation is generated using Netbeans. X3D schema documentation is generated using XML Spy.
  • Experimental. X3D v4.0 Doctype Documentation and X3D v4.0 Schema Documentation (.zip)
  • Experimental. X3D Object Model v3.3 and X3D JSON Schema v3.3 (documentation).
• Humanoid Animation (H-Anim)
  • The Humanoid Animation (H-Anim) Specification has a corresponding specification for the X3D H-Anim component and a corresponding H-Anim Examples Archive.
  • The H-Anim Executive Summary summarizes current capabilities and significant additional work being considered by the H-Anim Working Group.
• International Standards Organization (ISO)
  • ISO/IEC 9973 Register of Graphical Items includes detailed definitions for hatchstyle values (used by FillProperties node) and linetype values (used by LineProperties node).
• X3D Tooltips provide multi-lingual authoring tips, hints and warnings for each node and field in X3D.

Additional authoring support includes the following assets.

• Pellucid is a Java applet that simulates the VRML/X3D illumination model given a default view of a sphere, a default directional light with direction [ -1 -1 -1 ], and a default material.
  • example Pellucid screenshot).
  • Caveat: to run the applet, you may need to add this site to your Java Control Panel Security Exception Site List (documentation).
• NIST Plugin and Browser Detector for server-side determination of VRML or X3D browser in use
• Tools often need to support offline validation of content that includes authoritative online urls for the XML DOCTYPE and Schema. An OASIS specification defines how to map authoritative urls to local copies. OasisXmlCatalogX3D.xml is one example how an application can accomplish that.
• The X3D Working Group is also showing how to best provide X3D + HTML5 support for the draft HTML5 Recommendation.

Books about X3D and VRML

Books on Extensible 3D (X3D) Graphics

X3D Graphics is the international standard for real-time 3D communication.

1. X3D for Web Authors by Don Brutzman and Len Daly, Morgan Kaufmann Publishers, Elsevier, April 2007, 468 pages.
   • Free book download in ACM Digital Library is available for ACM and SIGGRAPH members.
   • X3dGraphics.com provides free X3D example scenes and chapter slidesets.
   • Course video lessons for learning X3D (also YouTube course video archive).
   • Online course for enrolled NPS and distance-learning students.
2. Visualizing Information Using SVG and X3D by Vladimir Geroimenko and Chaomei Chen, editors, Springer, 2008.
3. Computer Graphics: From a Small Formula to Cyberworlds by Alexei Sourin, 3nd edition, Pearson Prentice Hall, Singapore, 385 pages, 2012. Chapter 14 discusses X3D and VRML.
4. Networked Graphics: Building Networked Games and Virtual Environments by Anthony Steed and Manuel Fradinho Oliveira, Elsevier, 536 pages, 2009. Chapter 7 discusses X3D, X3D-Edit and DIS.
5. Interactive 3D Multimedia Content: Models for Creation, Management, Search and Presentation, edited by Wojciech Cellary and Krzysztof Walczak, Springer London, 302 pages, 2012. Contributed chapters discuss X3D capabilities together with other standards, then describe significant implemented research work regarding 3D/VR/AR systems. Most works provide extensions based on the VRML/X3D standards. Online resource: Chapter 2, Interactive 3D Content Standards.
6. Core Web3D by Aaron E. Walsh and Mikaël Bourges-Sévenier, Prentice Hall PTR, Upper Saddle River, New Jersey USA, 1088 pages, 2000. Several chapters discuss developmental versions of X3D.
7. VRML & X3D for virtual reality by KyungBae Park, KyungIn Kang and SeungWook Kwak, 21 Century, ISBN-10: 8984681903, 422 pages, 2006 (in Korean).
8. X3D, Who are you? Focus on examples for Web 3D design by KyungBae Park and SeungWook Kwak, Global, ISBN-13: 9788955024135, 472 pages, 2007 (in Korean).
9. WebGl HOTSHOT by Mitch Williams, ISBN-13: 9781783280919, 306 pages, 2014. Chapter 1 shows how X3D complements WebGL.

Books on Virtual Reality Modeling Language (VRML) 97

VRML design began in 1994 and the language became a stable International Standard in 1997. Of interest: X3D is a third-generation design that is fully backwards-compatible with the second-generation VRML 97 standard. Thus all design guidelines and technical details in the following textbooks remains relevant.

10. VRML 2.0 Sourcebook by Andrea L. Ames, David R. Nadeau, and John L. Moreland, John Wiley & Sons, 1996. (also see VRML 2.0 Sourcebook examples in X3D)
11. Annotated VRML 2.0 Reference Manual by Rikk Carey and Gavin Bell, Addison Wesley, Boston Massachusetts, 1997.
12. Late Night VRML 2.0 with Java by Bernie Roehl, Justin Couch, Cindy Reed-Ballreich, Tim Rohaly and Geoff Brown, Ziff-Davis Press (Macmillan Publishers), 1997.
13. VRML 2.0 Handbook by Jed Hartman and Josie Wernecke, Addison Wesley, Boston Massachusetts, 1996. Also see the Tenochtitlan examples.
14. VRML: Exploring Virtual Worlds on the Internet, by Walter Goralski, Matthew Poli, and Peter Vogel, Prentice Hall PTR, January 1997.
15. Das Einsteigerseminar VRML by Prof. Dr. Rolf Däßler, April 2001, BHV Publishing Group, 498 pages, in German. Available online.

Also available: VRML Resources.

Conformance Testing for X3D

There are three conformance test suites to help improve the quality of X3D and VRML players.

• VRML Test Suite (VTS) offers numerous open-source scenes along with with images and movie clips demonstrating correct rendering responses. Coverage includes the entire VRML97 Specification.
• ConformanceNist Test Suite X3D Examples upgrades the VRML Test Suite examples into X3D scenes, again offering numerous open-source scenes along with with images and movie clips demonstrating correct rendering responses. Coverage includes the X3D Immersive Profile.
• (Web3D members only) The X3D Conformance Testing Suite Access page explains the Web3D Conformance Suite. This interactive archive offers coverage of the X3D Interchange Profile.

The Web3D Consortium offers compliance certification of this last suite. X3D Conformance Testing Program describes details.

The Web3D Consortium also supports the Conformance working group mailing list which includes list archives.

Of related interest: Quality Assurance (QA).

Conversions and Translation Tools

Numerous conversion tools are available for the various encodings of X3D and VRML.

X3D is a direct superset of VRML with three encodings: XML encoding (.x3d), Classic VRML encoding (.x3dv) and VRML97 encoding (.wrl). X3D is designed so that all three encodings are equivalent, you can choose to use any of them.

Converting X3D scenes to/from VRML (.wrl) also works well, since X3D is 3rd-generation VRML. The functionality provided by the VRML97 specification matches the X3D Immersive Profile.

1. X3D players providing file-menu conversions (Save As) include BSContact, OctagaVS(pro), view3Dscene, and Xj3D.
2. Xj3D Open Source for X3D/VRML97 includes command-line and file-menu X3D translators between all three encodings. Xj3D can also import Collada files.
3. X3D-Edit exposes all of these Xj3D conversion capabilities via a conversion panel embedded under the X3D...Import and ...Export menus. X3D-Edit can further import, export and also edit, validate Collada files.
4. XSLT Stylesheets convert .x3d scenes into alternate formats and encodings. These slidesets (and corresponding batch files) are bundled in X3D-Edit.
   • Conversion to ClassicVRML (.x3dv encoding): X3dToX3dvClassicVrmlEncoding.xslt, X3dToVrml97.xslt -fileEncoding=ClassicVRML and X3dToX3dvClassicVrmlEncoding.bat
   • Backwards compatibility with VRML 97 (.wrl encoding): X3dToVrml97.xslt and X3dToVrml97.bat. Warnings are embedded in the output .wrl and provided on the console when such conversions have any difficulty due to an X3D feature not being supported in VRML97. In general, any X3D scene that fits within the Immersive Profile will convert successfully to VRML97.
   • Tagset pretty-printing in HTML (.html encoding), includes cross-link indexing of DEF/USE/ROUTE/etc.: X3dToXhtml.xslt and X3dToXhtml.bat plus incremental partial-stylesheet lesson examples (X3dToXhtmlStylesheetExamples.zip)
   • X3D to JSON Stylesheet converts .x3d XML to .json, supporting the forthcoming JSON Encoding for X3D Graphics.
   • Current versions of the X3D stylesheets are checked into version control at https://sourceforge.net/p/x3d/code/HEAD/tree/www.web3d.org/x3d/stylesheets
5. 3D PDF Converter includes support for X3D export. This capability allows users to easily visualize, validate and then export CAD data in a suitable format for import into a 3rd Party System.
6. Accutrans 3D by MicroMouse Productions provides accurate translation of 3D geometry between the file formats used by many popular modeling programs.
7. Anark is able to export product data into high-precision B-rep and lightweight mesh formats including SolidWorks, Inventor, ACIS, CATIA V4/V5, Parasolid, STEP, NX (formerly Unigraphics), IGES, COLLADA, DWF, X3D, and VRML.
8. Ayam is a free open-source 3D modeling environment for the RenderMan interface with X3D import and X3D export.
9. BaconXJF open-source 3D Web Formats Import-Export Tool for Maya and Maya LT includes X3D support. "It's a work in progress, but a good start..." Created by Aaron Bergstron, original author of the RawKee X3D Exporter for Maya. Demonstration videos also available.
10. BitManagement capabilities include BS Converter for 3ds max and BS Converter for Blender.
11. Blender provides excellent top-level import/export support, as described by Blender Model Export To X3D using X3D-Edit.
12. CAD Exchanger is commercial C++ software to view and convert 3D models that supports multiple formats including VRML and X3D.
13. Chisel VRML Optimisation Tool with new version autoinstaller and documentation provided by Halden Virtual Reality Centre. Originally built by Trapezium and maintained by NIST.
14. Clara.io can be used to create or import models, animate them and render online. Support is provided for multiple import/export data exchange formats.
15. Cura3D printing software supports X3D model import. Cura3D can output to multiple 3D printers and also export G-code.
16. InstantReality X3D encoding converter is an online translator between ClassicVrml or XML (.wrl) encoding, and can also convert into X3DOM outputs (HTML5 or XHTML5). Free for non-commercial use.
    • InstantReality installations include aopt, a local command-line converter.
    • InstantReality also offers a separate InstantExport plugin for 3D Studio Max.
17. MeshLab is an open source, portable, and extensible system for the processing and editing of unstructured 3D triangular meshes.
18. Modo by Luxology is a sophisticated authoring tool that includes X3D export.
19. NIST VRML to X3D Translator was originally written by Qiming Wang. An updated version of the source (and a .zip distribution) are maintained on SourceForge. The translator is also bundled in X3D-Edit under the X3D/Import/VRML97 menu.
20. Okino Polytrans/NuGraf is the premier industry translation tool that can convert many many different file formats (including Collada) to and from X3D, VRML97 and VRML 1.0. Their original 2002 press release describes the central value of the VRML/X3D scene graph as a detailed, extendable design used in the Okino converter architecture.
21. Open Cascade is an open source (LGPL) geometry kernel written in C++ uses PythonOCC. The Web3D CAD public wiki includes a STEP to X3D Python script.
22. PDF3D provides support to convert, edit, store and share 3D data in PDF. File-format support includes VRML97.
23. PMOD 3D Imaging Rendering Tool (P3D) enables interactive investigation of volumetric medical data and imagery as part of modeling tool suite.
24. Project Rawkee: Open-Source X3D Plugin for Maya by the Archaeology Technologies Laboratory (ATL) of North Dakota State University (NDSU).
25. SteelVis (CIS/2 to VRML and IFC Translator, aka CIS/2 Viewer) by National Institute of Standards and Technology (NIST)
26. SPRI Server Step Conversion allows browsing the content of STEP files, which can contain multiple geometric models. Further information is found on the Web3D CAD public wiki.
27. SwirlX3D Translator is an enhanced version of the Viewer that permits Collada and 3DS files to be imported into VRML or X3D (Windows) (support).
28. Unreal Realm of Concepts: Unreal to X3D Exporter by Dave Arendash
29. view3dscene supports VRML/X3D, Collada, OpenInventor 1.0, 3d Studio Max 3DS, Quake 3 MD3, Wavefront OBJ and Videoscape GEO.
30. Vivaty has utilities and converters for Google Earth KML/Sketchup, Autodesk 3DS Max, Autodesk Maya, and Unreal. Vivaty Studio also includes Collada import.
31. VRML 1.0 to VRML97 Converter by Octaga
32. XIOT X3D Input Output Tool library provides an open source generic C++ toolkit to import and export X3D in its different XML encodings: ASCII and binary. A special development was done to provide a Fast Infoset (FI) based X3D encoding.

Examples: Scene Archives for X3D

The X3D Examples Archives demonstrate how X3D nodes and scenes work. Thousands of scenes are provided in all X3D encodings. You can browse them individually online or download fully complete, separately installable .zip archives.

Links to additional X3D example scenes are also available below.

A simple example test scene is HelloWorld.x3d provided in a variety of X3D encodings: .x3d XML .x3dv ClassicVRML, .wrl VRML97, .html listing, .html Cobweb, .xhtml X3DOM, .json JavaScript Object Notation, .x3db compression, C14N canonicalization, and .png image

Special testing distribution. A comprehensive collection of all JSON example scenes is available at X3dExampleArchivesJsonScenes.zip (MD5 checksum) plus current output from the X3D JSON build process at build.json.out.

Production notes:

• README.txt summarizes archive contents and lists key links.
• Build scripts are written using Ant with build.xml files in each archive's root.
• Please install a player plugin in your Web browser to view X3D/VRML scenes and browse these examples. Alternatively you can view X3DOM versions by selecting the .xhtml links.
• These examples are maintained by the Web3D Consortium and are all protected under an open source license, provided free for any use.
• The Sourceforge X3D Project is the site where master versions of most X3D examples are maintained.
• Quality Assurance regression testing provides exhaustively thorough validation checks on all X3D example scenes.
• Each example scene is provided using all X3D file encodings.
  • XML .x3d, ClassicVRML .x3dv, VRML97 .wrl and pretty-print HTML .html form. Compressed Binary Encoding .x3db and X3D Canonicalization (C14N) .xml formats were added in 2006.
  • X3DOM .xhtml formats were added in 2013.
  • The viewpoint snapshot slidesets (with images taken by Xj3D in offline-rendering mode) were added in 2014.
• Zipped example archives start with the directory structure www.web3d.org/x3d/content/examples in order to match the online addresses for most examples, and also to allow side-by-side installation of local archives for easier user access.

Example scene archive details:

1. X3D for Web Authors Examples Archive (license, README.txt)
   • A wide variety of basic examples are provided for the corresponding textbook that show how to design and build X3D scenes.
   • Online at http://x3dGraphics.com/examples/X3dForWebAuthors
   • Compressed archive (~100 MB) at X3dExamplesX3dForWebAuthors.zip (MD5 checksum)
   • Subversion master source is retrievable via subversion check out:
     svn co https://svn.code.sf.net/p/x3d/code/www.web3d.org/x3d/content/examples/X3dForWebAuthors X3dForWebAuthors
   • Source is viewable at https://sourceforge.net/p/x3d/code/HEAD/tree/www.web3d.org/x3d/content/examples/X3dForWebAuthors,
   • Model source change notifications are reported via the x3d-commits mailing list.
   • build.out.txt shows recent build results including X3D scene validation successes, errors and warnings. Bug reports are tracked online.
   • X3D Examples for Web Authors Project continuous integration testing is performed by the Savage Jenkins server, with latest console error logs and nightly build products available online.

   ---

2. X3D for Advanced Modeling Examples Archive (license, README.txt)
   • X3D for Advanced Modeling is a work in progress for learning advanced Extensible 3D (X3D) Graphics modeling, simulation and visualization techniques.
   • Online at http://x3dGraphics.com/examples/X3dForAdvancedModeling
   • Compressed archive (~60 MB) at X3dExamplesX3dForAdvancedModeling.zip (MD5 checksum)
   • Subversion master source is retrievable via subversion check out:
     svn co https://svn.code.sf.net/p/x3d/code/www.web3d.org/x3d/content/examples/X3dForAdvancedModeling X3dForAdvancedModeling
   • Source is viewable at https://sourceforge.net/p/x3d/code/HEAD/tree/www.web3d.org/x3d/content/examples/X3dForAdvancedModeling,
   • Model source change notifications are reported via the x3d-commits mailing list.
   • build.out.txt shows recent build results including X3D scene validation successes, errors and warnings. Bug reports are tracked online.
   • X3D Examples for Web Authors Project continuous integration testing is performed by the Savage Jenkins server, with latest console error logs and nightly build products available online.

   ---

3. Basic X3D Examples Archive (license, README.txt)
   • The Basic Examples archive provides numerous scenes illustrating a broad variety of X3D capabilities.
   • Online at http://www.web3d.org/x3d/content/examples/Basic
   • Compressed archive (~350 MB) at X3dExamplesBasic.zip (MD5 checksum)
   • Subversion master source is retrievable via subversion check out:
     svn co https://svn.code.sf.net/p/x3d/code/www.web3d.org/x3d/content/examples/Basic Basic
   • Source is viewable at https://sourceforge.net/p/x3d/code/HEAD/tree/www.web3d.org/x3d/content/examples/Basic,
   • Model source change notifications are reported via the x3d-commits mailing list.
   • build.out.txt shows recent build results including X3D scene validation successes, errors and warnings. Bug reports are tracked online.
   • X3D Examples Archive Basic Project continuous integration testing is performed by the Savage Jenkins server, with latest console error logs and nightly build products available online.

   ---

4. ConformanceNist Test Suite X3D Examples Archive (license, README.txt)
   • The ConformanceNist Test Suite Examples were authored by National Institute of Standards and Technology (NIST) to provide complete test set for the Virtual Reality Modeling Language (VRML97). They were automatically converted into X3D and provide approximate coverage for the X3D Immersive Profile.
   • Online at http://www.web3d.org/x3d/content/examples/ConformanceNist
   • Compressed archive (~185 MB) at X3dExamplesConformanceNist.zip (MD5 checksum)
   • Subversion master source is retrievable via subversion check out:
     svn co https://svn.code.sf.net/p/x3d/code/www.web3d.org/x3d/content/examples/ConformanceNist ConformanceNist
   • Source is viewable at https://sourceforge.net/p/x3d/code/HEAD/tree/www.web3d.org/x3d/content/examples/ConformanceNist,
   • Model source change notifications are reported via the x3d-commits mailing list.
   • build.out.txt shows recent build results including X3D scene validation successes, errors and warnings. Bug reports are tracked online.
   • X3D ConformanceNist Examples Project continuous integration testing is performed by the Savage Jenkins server, with latest console error logs and nightly build products available online.
   • Original NIST VRML Test Suite is browsable at http://xsun.sdct.itl.nist.gov/~mkass/vts/html/vrml.html

   ---

5. VRML 2.0 Sourcebook X3D Examples Archive (license, README.txt)
   • The VRML 2.0 Sourcebook is an outstanding textbook covering the Virtual Reality Modeling Language (VRML) 97. The original examples from that book were the first scenes converted into X3D. SIGGRAPH 98 course notes are also online.
   • Online at http://www.web3d.org/x3d/content/examples/Vrml2.0Sourcebook
   • Compressed archive (~115 MB) at X3dExamplesVrml2.0Sourcebook.zip (MD5 checksum)
   • Subversion master source is retrievable via subversion check out:
     svn co https://svn.code.sf.net/p/x3d/code/www.web3d.org/x3d/content/examples/Vrml2.0Sourcebook Vrml2.0Sourcebook
   • Source is viewable at https://sourceforge.net/p/x3d/code/HEAD/tree/www.web3d.org/x3d/content/examples/Vrml2.0Sourcebook,
   • Model source change notifications are reported via the x3d-commits mailing list.
   • build.out.txt shows recent build results including X3D scene validation successes, errors and warnings. Bug reports are tracked online.
   • X3D Vrml 2.0 Sourcebook Examples Project continuous integration testing is performed by the Savage Jenkins server, with latest console error logs and nightly build products available online.

   ---

6. Savage X3D Examples Archive (license, README.txt)
   • NPS Scenario Authoring and Visualization for Advanced Graphical Environments (SAVAGE) library is an open-source set of models used for defense simulation.
   • Online at https://savage.nps.edu/Savage
   • Compressed archive (~1.7 GB) at X3dExamplesSavage.zip (MD5 checksum) (also nightly builds)
   • A Savage paper describes our overall modeling approach. The Savage Modeling Analysis Language (SMAL) thesis, schema and examples describe the corresponding simulation-entity metadata approach.
   • Subversion master source is retrievable via subversion check out:
     svn co https://savage.nps.edu/sub/nps/Savage Savage
   • Source is viewable at https://savage.nps.edu/svn/repos/nps/list/Savage,
   • Model source change notifications are reported via the savage-svn mailing list.
   • build.out.txt shows recent build results including X3D scene validation successes, errors and warnings. Bug reports are tracked online.
   • X3D Savage Examples Project continuous integration testing is performed by the Savage Jenkins server, with latest console error logs and nightly build products available online.

   ---

7. SavageDefense X3D Examples Archive (restricted access) (license, README.txt)
   • NPS SavageDefense library is an open-source set of models used for defense simulation. Access is restricted to NPS partners working on government-sponsored projects.
   • Online at https://savagedefense.nps.navy.mil/SavageDefense
   • Compressed archive (1.3 GB) at X3dExamplesSavageDefense.zip (MD5 checksum) (also nightly builds)
   • Subversion master source is retrievable via subversion check out:
     svn co https://savagedefense.nps.navy.mil/sub/nps/SavageDefense SavageDefense
   • Source is viewable at https://savagedefense.nps.navy.mil/svn/repos/nps/list/SavageDefense
   • build.out.txt shows recent build results including X3D scene validation successes, errors and warnings. Bug reports are tracked privately.
   • X3D SavageDefense Examples Project continuous integration testing is performed by the SavageDefense Jenkins server, with latest console error logs and nightly build products available online.

Source version control is available for developers wanting to track or contribute to these X3D example archives.

• Use Netbeans, X3D-Edit or some other subversion client (such as TortoiseSVN or Collabnet) to check out the version-control source and project information.
• Decide whether to use anonymous access or else a personal sourceforge account.
• Check out
  https://sourceforge.net/p/x3d/code/HEAD/tree/www.web3d.org/x3d/content/examples/Basic
  usually to a local directory such as
  C:\x3d-code\www.web3d.org\x3d\content\examples\Basic
• Further links and information available via the x3d sourceforge project.

Additional Example Scene Archives

Additional X3D example scene collections designed to demonstrate VRML/X3D capabilities include the following.

8. BitManagement Interactive Demos
9. Castle VRML / X3D demo models which were produced for the Kambi/Castle game engine by Michalis Kamburelis.
10. H3DAPI examples repository and example scenes
11. Holger Grahn's VRML Demos
12. InstantReality examples and test-set files (.zip)
13. IrishSpace was a volunteer effort to create a VRML Space Exhibit for the Children of Ireland. The project resulted in a multimedia space adventure in which a group of future emigrants set out from Earth aboard the Jeanie Johnston to settle the Solar System. This content was designed and built by Paul S. Hoffman, Len Bullard, and many other individuals.
14. Alexei Sourin's book Computer Graphics: From a Small Formula to Cyberworlds provides online examples including Virtual Campus of Nanyang Technical University (NTU) Singapore.
15. Tenochtitlan is a large VRML site illustrating the 1519 history of Cortes and Moctezuma on the island city of Tenochtitlan, center of the Aztec Empire. This content was designed by Delle Maxwell as a companion piece to the VRML 2.0 Handbook.
16. 3D CAD Browser .com has both commercial and kind-of free (tradable) models available. Output formats include .x3d and .wrl formats.
17. WebRing X3D and VRML.

Export by Applications

The following applications are known to have X3D or VRML output capabilities. Additional entries are welcome. Also see Conversions and Translation Tools on this page.

1. Autodesk 3DS Max exports VRML.
2. Chemistry Markup Language (CML) examples in the public X3D Basic Examples Archive show how to covert CML models into X3D using a simple stylesheet.
3. Chimera by UCSF is a highly extensible program for interactive visualization and analysis of molecular structures and related data. Chimera exports X3D and VRML97.
4. ESRI ArcScene with 3D Analyst extension can export an assembled GIS scene to VRML and optionally GeoVRML.
5. Jmol is an open-source Java viewer for three-dimensional chemical structures, with features for chemicals, crystals, materials and biomolecules. Jmol can illustrate most molecular-model features via VRML97 and X3D (XML) export.
6. Maple provides powerful math-oriented technical computing software for engineers, mathematicians, and scientists. Maple 13 exports X3D.
7. Mathematica is a powerful computational tool for numerics of any precision, symbolics, or visualization. Mathematica can export X3D and VRML.
8. Live Interior 3D Pro includes export to VRML and X3D.
9. Rhino includes VRML export and apparently X3D export as well.
10. SketchUp Pro by Trimble can export VRML files
11. SOLIDWORKS by Dassault Systemes includes VRML import and export
12. VMD is a molecular visualization program for displaying, animating, and analyzing large biomolecular systems using 3D graphics and built-in scripting. VMD is designed for modeling, visualization, and analysis of biological systems such as proteins, nucleic acids, lipid bilayer assemblies, etc. and may be used to view more general molecules. Export features include support for X3D, VRML97 and VRML 1.0.
13. VRMLout for AutoCAD and VRML Translator for Inventor can publish AutoCAD 3D models and Autodesk Inventor assemblies on the Web.

Feedback

Feedback is welcome on any X3D topic. Scene authors and interested users are always welcome to participate in the X3D Graphics community.

1. Comments, questions and trouble reports help to improve X3D resources or clarify the X3D specifications.
2. Web3D mailing lists are active and archived. These are a great place to ask a question or search for earlier answers.
   • The x3d-public@web3d.org open mailing list   (subscribe) (archive) is frequently used to discuss X3D authoring and scene improvement.
   • The X3D Graphics Working Group mailing list (subscribe) (archive) is also available for Web3D Consortium members discussing new-technology contributions.
   • The many Web3D Consortium working group mailing lists are used to discuss further details for specification development.
3. Web3D Standards Comment Form is used for identifying specification issues, detailed bug reports, suggestions and changes.
   • Reporting problems and recommending changes are important steps, they prevent grief for future authors and implementers.
   • Sending in the report gets the issue into the bug-tracking system and also sent to the mailing list for discussion.
   • If you first login as a Web3D Consortium member, a log of your posts is maintained for your convenience.
4. All opinions are valued. Dialog, lessons learned, success stories and alternatives are always considered helpful as part of our technology explorations and mailing-list discussions.
   • Our overarching goal is to compatibly improve X3D examples, tools, and specification prose for the X3D and H-Anim International Standards.
   • Dedicated diligence supports long-term usage, interoperability, and archival stability of interactive 3D graphics models for the Web.
   • Since 1994, all VRML and X3D progress has occurred through cooperative community efforts by industry, academia, agencies and interested professionals.
5. Web3D Consortium members actively support X3D specification development.
   • We follow an open and proven process, described in our Standards Submission Policy.
   • Mantis issue tracking by working-group members keeps track of details, alternatives and resolution for each specification issue. (Secondary login required for Web3D members.) Administration details are available on the Mantis documentation.
   • Web3D Consortium github (member-only access) is used to maintain editors-draft Web3D specifications in version control.
   • All draft X3D specifications are first developed by X3D Working Group participants.
   • All draft X3D specifications are discussed by the open community on the x3d-public mailing list.
   • Following certification by Web3D Consortium members, member-country delegations in the International Organization for Standardization (ISO) ratify and approve final status as an International Standard (IS).
6. Further motivation: interactive 3D graphics continues to steadily advance, and the Web is the next major frontier.
   • We are working to make 3D a first-class media type on the Web that has broad usability similar to images, vector graphics, audio and video.
   • Experienced 3D authors know that making a great 3D model takes a lot of work.
   • (Painful) humor: we have found a task that is just as hard: rebuilding that same 3D model three years later, because the previous proprietary software is no longer usable. Ouch.
   • X3D is a good fit for the Open Web Platform (OWP) for publishing rich interactive experiences, powered by vast data stores, that are available on any device. Combined technology standards include HTML5, Cascading Style Sheets (CSS), Javascript, Scalable Vector Graphics (SVG) and MathML.
7. Get involved! You too can be part of this great progress.
• Join the ongoing mailing list discussions to learn more and contribute your ideas about 3D on the Web.
• The Projects Wish List lists many interesting developer opportunities with potentially broad impact.
• Among other things, Web3D Consortium membership provides a safe haven for companies to carefully look at possible contribution of proprietary technology, ultimately becoming royalty-free capabilities for unrestricted use on the Web.
• Anyone can help build the Web. Thanks for considering these important possibilities.

Need something else? You can contact Web3D Consortium or else contact X3D Working Group cochairs for any direct or private inquiries.

Questions, suggestions, additions and comments regarding this X3D Resources page are also welcome. Please see the Contact section below.

License

• X3D authors can place a meta tags in a scene to document what license being applied. For example, one of the following is typically included in the X3D scenes found in the Web3D Consortium and NPS open-source example archives:

  <meta name="license" content="../../license.html">
                  

  <meta name="license" content="http://www.web3d.org/x3d/content/examples/license.html">
                  

  <meta name="license" content="https://savage.nps.edu/Savage/license.html">
                  

• This default open-source license is available for X3D models and source code produced by NPS (and others) for the various Web3D and Savage model archives.
  • The license is available as license.html and also available in plain-text form as license.txt for embedding in source-code files.
  • The terms of this non-viral BSD open-source license permit both commercial & non-commercial uses. The contributing authors retain original copyright as appropriate. This license can be adapted for use by other open-source contributors, as desired.
• The Open Source Initiative (OSI) lists alternate open-source licenses that are also acceptable for other public contributions to the Web3D Consortium's archives and resources.
• Book: Understanding Open Source and Free Software Licensing by Andrew M. St. Laurent, O'Reilly Media, Sebastopol California, 2004. Also available online.
• Creative Commons is another important resource for crafting appropriate licenses.
• The Savage Developers Guide includes further references of value regarding Intellectual Property Rights (IPR) issues: Free as in Freedom and Licensing.
• The X3DOM dual license is open source and includes both the MIT License and GNU General Public License (GPL) v3 or later.
• The X3D Standards are royalty free and published openly online by the Web3D Consortium under a cooperative agreement with the International Standards Organization (ISO). It was among the first International Standards to be published online and without charge. Please contact Web3D to request permission to use that work.

Mobile Support

There is a mobile subset of the X3D vocabulary called the X3D Interactive Profile. Conversion tools are likely to emerge that can down-convert scenes using the X3D Immersive Profile or VRML97 for lightweight mobile and embedded applications.

• BitManagement's BS Contact Mobile X3D/VRML97 plugin for handheld devices running the Windows Mobile operating system.
• RayGun by Planet9 Studios is a GPS tracking, navigation and social networking application that works on PCs, cell phones, PNDs and embedded systems.
• X3DOM runs on all devices.

There has been a lot of dialog about X3D Mixed and Augmented Reality (MAR) and whether a new X3D Mobile Profile is possible that harmonizes capabilities for lightweight scenes running with HTML5 on mobile devices, possibly including essential AR and GPS capabilities. How can such X3D capabilities best be aligned with HTML?

Join the X3D Graphics public mailing list to join the discussion, learn more and contribute!

Model Search

The X3D Examples archives include thousands of open-source models contributed by Web3D Consortium members.

You can also search for X3D models at these sites:

1. 3dbar.net free collections from 3D designers
2. 3D Model Search Engine by Princeton Shape and Retrieval Analysis Group (various sources)
3. Archibase Planet free model collections from 3D designers
4. archive3d.net model search and download
5. MakerBot Thingiverse design community for discovering, making, and sharing 3D printable things
6. Shapeways 3D Printing Service and Marketplace, which also offers guidance on exporting VRML files for Shapeways.
7. Turbo Squid (for purchase and free)
8. yeggi.com Search Engine for 3D printable Models
9. yobi3d.com (proprietary, available for non-commercial use)

PowerPoint Support

• Installing Cortona VRML Browser as a PowerPoint Control (also in .html) by Don Brutzman, Curt Blais and the SAVAGE group

TODO: we need a more up-to-date way to install X3D plugins for PowerPoint.

Quality Assurance (QA)

X3D Quality Assurance (QA) identifies errors and warnings in order to make X3D scene content more portable and reliable.

• New. X3D JSON Schema (documentation) detects type and syntax errors in the experimental X3D JSON Encoding. Currently authored manually by Roy Walmsley. Eventually this tool will be autogenerated for all X3D versions.
• X3D Tidy helps authors automatically correct fixable errors in X3D scenes. Improved Quality Assurance (QA) helps achieve intended results in X3D scenes and metadata.
• X3D Validator provides a server-based suite of tests to help ensure the quality of X3D scenes and metadata. Validation tests include:
  • XML header and DOCTYPE checking for correct document headers
  • Well-formed XML checking for syntactic correctness
  • X3D Specifications: DOCTYPE and Schema Validation checking for valid X3D nodes, fields and values
  • X3D Schematron rule checking verifies semantic correctness and completeness, detecting internal-consistency problems to help assure the quality and correctness of X3D scenes
  • X3D to ClassicVRML conversion checks a variety of legal X3D constructs
  • Regular expression checking for malformed floating-point numbers and excess leading zeros
  • X3D to XHTML conversion pretty-print listing to check online URL links, document ROUTE connections, and provide node tooltips
  • X3D Validator is written in Java using publicly available source code.
• X3D-Edit authoring tool also provides further tools and tests (individually or in combination) for checking X3D scenes.
  • X3D Canonicalizer (C14N button) applies X3D Canonicalization (C14N) .xml to reformat scenes into X3D Canonical Form.
  • Additional test: ExternProtoDeclare field verification checks that field signatures match the original ProtoDeclare definitions, providing author with the option to apply updates.
  • Additional test: url list editor checks for resource availability (green=found, black=retrieving, red=unavailable, orange=filename case mismatch).
• Running individual X3D players and applications often can reveal errors in the browser console. For example, Xj3D is very strict about playing content with perceived errors.
• All of the several thousand scenes that are checked into the X3D Example Archives undergo the full set of validation checks each night as part of continuous-integration Jenkins builds.
• Example diff image reveals subtle changes following an Xj3D renderer update. Established capability: offscreen rendering of X3D example scene viewpoints unlock 10,000+ helpful unit tests.
• Work in progress: X3D Regular Expressions (regexes) are used to validate the correctness of string and numeric array values in an X3D scene.

The X3D Scene Authoring Hints: Validation describes DOCTYPE (DTD) and XML Schema validation of X3D scenes in detail.

The X3D Specifications are the authoritative reference for determining correctness of X3D scenes.

Of related interest: Conformance Testing.

References

Extensible 3D (X3D) Graphics

• Extensible 3D (X3D) Graphics Working Group
• Extensible 3D (X3D) Specifications and feedback form
• X3D: Extensible 3D Graphics Standard by Leonard Daly and Don Brutzman, 6 pages.
• X3D MIME Media Types are approved two-part identifiers for X3D file formats on the Internet: x3d+xml, x3d-vrml and x3d+fastinfoset (approval, announcement). This page also describes proper configuration of http servers and media-type filters for X3D.
• Extensible 3D: XML Meets VRML by Len Bullard

Security

Open security by design, as specified by W3C's XML Security Recommendations, provides the strongest approach for secure Web documents used internationally on the Web.

The .x3d encoding is XML based, which means that the full power of Web Security can be applied to X3D Graphics models.

• X3D Security Examples provides various encrypted/signed scenes that demonstrate conversions for XML Encryption and XML Signature (digital authentication)
• X3D Security Examples README describes technical detail about how all this works together.

X3D model security supports multiple existing and emerging capabilities:

• Multiple forms of validation and Quality Assurance (QA) are available to prevent unwanted insertions of malicious content in X3D models.
• Strongly typed Metadata nodes can be inserted in any X3D model. Interchange conventions are expected to emerge with growing usage.
• Security mechanisms such as encryption and authentication can be applied to high levels of detail (LOD), allowing authors to protect intellectual property at high resolution for authorized users while still rendering simple unrestricted models for other users.
• XML Security compatibility provides two crucial technologies: the W3C XML Encryption and XML Signature (digital authentication) Recommendations.
• XML Security mechanisms can be applied to entire scenes in .x3d files (XML documents) or scene subgraphs within an .x3d file (XML fragments).
• XML Encryption Requirements include super-encryption, multiple signatures, and also optional declaration of alternative encryption algorithms in the unencrypted envelope header.
• XML Security software libraries are broadly available and usable by international partners in any context, including Web commerce.
• Data-centric security is independent of network-transport security.
• W3C Efficient XML Interchange (EXI) Working Group efforts for best practices are ensuring that EXI-based data compression of XML documents can be used compatibly with XML Security. Example prerequisite: EXI compression must precede encryption or else pseudo-randomization of bits precludes compression benefits.
• W3C Security Interest Group serves as a forum for discussion about improving standards and implementations to advance the security of the Web.
• Web3D Consortium members expect that required support for secure url addresses using https and ssl/tls protocols is likely to be included in X3D version 4.0.
• Full compatibility with XML Security capabilities is required for the next-generation X3D Efficient Binary Encoding under development.
• W3C Recommendation for Cross-Origin Resource Sharing (CORS) (also Wikipedia summary) precautions gain increasing importance as X3D pages are embedded in HTML5 pages.

Most of these capabilities are demonstrated and formalized already. Several are already working-group efforts in progress. Therefore, this emerging combination of capabilities can be considered low risk, with high probability of full convergence eventually occurring.

Vulnerabilities. X3D security vulnerabilities are relatively few but deserve attention. XML/HTML security resources follow.

• Open Web Application Security Project (OWASP) resources include a list of common Vulnerabilities and the Top Ten Project.
• 10 Most Common Web Security Vulnerabilities by Gergely Kalman.
• DOCTYPE (DTD) extension mechanisms are a rarely used but available capability in X3D. Care must be taken to ensure that extension DTDs (if used) are correct and secure. DTD extensions can also be inserted directly as part of an X3D scene. The rapid expansion of DTD constructs can quickly consume memory, so it is considered a denial-of-service (DoS) attack aimed at parsers of XML documents. Variations (sometimes referred to as an XML bomb) are described in the following references.
  • Billion laughs
  • Exponential entity expansion attack.
  • XML External Entity (XXE) Processing attack.
• Related overview: XML Schema, DTD, and Entity Attacks: A Compendium of Known Techniques by Timothy D. Morgan and Omar Al Ibrahim, VSR, 19 May 2014.
• NIST National Vulnerabilities Database (NVD) is the U.S. government repository of standards based vulnerability management data. NVD includes databases of security checklists, security related software flaws, misconfigurations, product names, and impact metrics.

X3D player and tool support for security:

• X3D-Edit authoring tool provides XML encryption and digital signature support.
• Advanced content developers can use native XML tools, such as Altova XML Spy.
• Apache web server documentation includes http security tips.
• Apache Santuario provides open-source software libraries in C++ and Java that are suitable for use within other applications. These are also used in the Eclipse XML Security Tools set of plugins.
• Proprietary encryption tools are occasionally available. User beware: security through obscurity is not strong security.
• TODO: better built-in support is needed by X3D players and tools.

The Web3D Consortium X3D Working Group participates in the W3C Security Activity and EXI Working Group to continue aligning X3D with ongoing developments.

Interested? Member participation is welcome.

Showcase DVD

The X3D Showcase DVD is produced twice each year the Web3D Consortium for outreach to members and interested individuals.

• X3D Showcase Production
• X3D Showcase mailing list (x3d-showcase-dvd@web3d.org) and hypermail archive
• X3D Showcase version control

X3D Tooltips

X3D Tooltips provide authoring tips, hints and warnings for each node and field in X3D. Multiple languages are available:

• English (online at http://www.web3d.org/x3d/tooltips/X3dTooltips.html)
• Chinese (online at http://www.web3d.org/x3d/tooltips/X3dTooltipsChinese.html)
• French (online at http://www.web3d.org/x3d/tooltips/X3dTooltipsFrench.html)
• German (online at http://www.web3d.org/x3d/tooltips/X3dTooltipsGerman.html)
• Italian (online at http://www.web3d.org/x3d/tooltips/X3dTooltipsItalian.html)
• Korean (online at http://www.web3d.org/x3d/tooltips/X3dTooltipsKorean.html)
• Portuguese (online at http://www.web3d.org/x3d/tooltips/X3dTooltipsPortuguese.html)
• Spanish (online at http://www.web3d.org/x3d/tooltips/X3dTooltipsSpanish.html)
• Thai (online at http://www.web3d.org/x3d/tooltips/X3dTooltipsThai.html)

Developer support:

• Sourceforge version control is used to maintain X3D Tooltip profiles for long-term development.
• README.txt describes how to contribute new tooltips in another language.
• all X3D Tooltip files are available in a bundled archive at http://www.web3d.org/x3d/tooltips/X3dTooltips.zip

Interested in contributing, by updating an existing set of tooltips or creating a new translation? X3D Tooltips inquiries are welcome.

Training and Tutorials for X3D

The annual Web3D Conference includes several excellent new tutorials each year. Now in it's 19th year, the conference is sponsored by ACM SIGGRAPH, Eurographics, and the Web3D Consortium.

The X3D for Web Authors textbook includes a comprehensive set of online examples, slidesets and videos. Coverage includes all of VRML  and the X3D Immersive Profile.

Additional training and tutorial resources include:

• The X3D for Web Authors Course Adoption page lists an introductory tutorial and chapter classes as X3D instruction.
• Instant Reality tutorials
• Edutech Wiki X3D tutorials by DKS
• VRML Primer and Tutorial and examples archive by Daniel K. Schneider and Sylvere Martin-Michiellot
• Understanding Scene Graphs by Aaron E. Walsh, Dr. Dobb's Journal, 1 July 2002 (covers VRML, X3D, MPEG-4, and Java3D).
• Yumetech X3D extensions documentation

Videos showing X3D

Numerous demonstration videos can be found online that show X3D models and applications in action.

1. Web3D Consortium Videos showcases many member interesting examples using X3D, VRML and H-Anim.
2. Web3D Consortium YouTube Videos includes multiple playlists organized by topic area
3. Web3D Conference YouTube Videos collects and archives videos from the annual Web3D Conference, now in its 21st year.
4. X3D for Web Authors online course videos (both on YouTube and at NPS)
5. Bit Management showcase and additional vimeo demo videos
6. Fraunhofer IGD YouTube videos
7. Damon Hernandez Metaverse One YouTube videos
8. Michalis Kamburelis Castle Game Engine YouTube videos
9. Sebastian Ullrich - Heart Surgery Simulation with Blender and H3D YouTube video
10. Virginia Tech VTVisionarium YouTube videos
11. VRML X3D and Realtime Web3D YouTube videos by m17design
12. Archival and Web-based Visualization of Volumetric Scans and Clinical Data for TBI using the X3D International Standard by Nicholas Polys and Andrew Wood, with proposal coauthored by Don Brutzman
13. Mathworks Matlab Simulink 3D Animation videos

The X3D for Web Authors book includes a full set of course video lessons for learning X3D.

Virtual Reality Modeling Language (VRML) 97

VRML design began in 1994 and the language became a stable International Standard in 1997. VRML97 is fully compatible with X3D and is the basis of the ClassicVRML .x3d encoding.

• VRML 97 Specification
• VRML Archives at web3d.org
• Cover Pages: VRML and X3D
• Floppy's Web3D Guide
• VRMLworks by Bob Crispen
• VRML books are also available

Open Inventor

Open Inventor is an object-oriented 3D toolkit offering a comprehensive solution to interactive graphics programming problems. Of interest: the original VRML design was directly based on a competitive community selection of the Open Inventor .iv format as being the current "best of breed" for Web markup of scene graphs. This architectural design similarity provides fundamental common ground between Open Inventor, VRML97 and X3D.

• SGI Open Inventor resources, including open-source download
• Visual Sciences Group (VSG) (supported nodes and writing a VRML/X3D file)
• Medical Image Processing and Visualization (MeVisLab)
• Creating Open Inventor Scene Descriptions by Reid M. Pinchback MIT
• Converters: Okino Polytrans, Blender
• Coin3D is an independent implementation of the Open Inventor API

Contact

Questions, suggestions, additions and comments about this X3D Resources page are welcome. Please send them to Don Brutzman (brutzman at nps.edu).

Master version of the X3D Resources page is available online at http://www.web3d.org/x3d/content/examples/X3dResources.html and available in Sourceforge version control.

Updated: 27 November 2016.