X3Dv4 Implementations

X3Dv4 Implementations Status

X3Dv4 implementations are under way.  X3D® Version 4 (X3Dv4) is a major upgrade to the Extensible 3D (X3D) Graphics International Standard that provides close support for the HTML5 Recommendation.

The X3D Working Group is executing the Web3D Standards Adoption Process and meeting guidance by Web3D Board of Directors, all to good effect.  Web3D Consortium membership has value!

Approach Summary

X3D activity includes over 20 years of progressive evolution that maintains durable stability and backwards compatibility.  The best way to introduce new capabilities is to propose them on the x3d-public mailing list so that they can be considered in detail. Then we add an agenda item to the next X3D Working Group teleconference so that the proposed capability can be discussed. Then, away we go:

  • Specification Prose: produce draft X3Dv4 Architecture Specification (github) aligning with W3C HTML5/DOM Recommendations.
  • Implement Code:      open-source JavaScript X_ITE and X3DOM players (for HTML5) plus other X3D browsers.
  • Evaluate Examples:  using all available X3D implementations and ~3500 models as unit tests in X3D Example Archives.
  • Finalize and Review: iteratively improve specification, implementations and examples until success thresholds are met.

X3D Node and Statement Inventory Comparison tracks progress of all known X3D players, authoring and validation tools.


  1. 26-31 July 2019. Publish draft specification plus examples and implementation updates at Web3D2019/SIGGRAPH 2019 conferences.
  2. 16 December 2019. Working group closes new-technology submissions, finalize all efforts. Prepare ISO NWIP document.
  3. First quarter 2020. Working Draft submitted to X3D Community, Web3D Consortium members, Web3D Board and ISO.

X3Dv4 Draft Specification Implementation Status

and Nodes

X3D Specification Paragraphs Examples Implementations Tooltips, links to Validation Notes
Annotation 42 Annotation component TODO Xj3D (partial)   Work in progress by Design Printing Scanning and Medical Working Groups
Event model alignment Modifications to Concepts, 4.4.8 Event model   X_ITE (complete), X3DOM (partial)   X3D Script/ROUTE events via DEF, HTML5/DOM events via id, browsers exchange event changes after render loops
Field name changes Affects child SF/MFNode field naming for ~10 nodes   X3D-Tidy conversion updates once resolved   See Potential future changes for improved consistency of field names
glTF file loading Multiple nodes for scene graph integration and advanced rendering   X3DOM, others   glTF closely related to Lighting model, also provides geometric compression.
HAnim v2

26 Humanoid Animation (HAnim) component, updating HAnimHumanoid and adding HAnimMotion node for BVH-style motion animation

TODO update Basic Archives: HAnim


Ready for update by other existing applications.

HAnimMotion, HAnimHumanoid HAnim v2 is undergoing ISO Final Draft International Standard editors review, expected completion 7 August 2019.

9 Networking component

Allow loading other model types, security precautions


Mantis 744, Mantis 1151, Mantis 1171, Mantis 1257

TODO support STL, PLY?

Lighting model

TODO add new capabilities while retaining optional backwards compatibility with X3Dv3

17 Lighting component


TODO confirm:

Castle Game Engine


  Satisfactory review by X3D Working Group of Physically Based Rendering (PBR) proposals by Michalis Kamburelis
Metadata field defaults Reduce verboseness of MetadataSet structures       Mantis 1092, primary effect limited to XML encoding defaults
PointProperties 12.4.5 PointProperties

Xj3D example

Basic Archives: Points


ready for more implementations


Mantis 1252

ISO/IEC 9973 Items Register

Projective Texture Mapping (PTM) 43. Projective Texture Mapping Component TODO publish



Volume Rendering Draft prose improvements needed for ImageTextureAtlas and  MultiPlanar Reconstruction MPRVolumeStyle nodes TODO needed X3DOM   Satisfactory initial review by Medical and X3D Working Groups of specification drafts by Ander Arbelaiz VicomTech


Layout 36 Layout Component None demonstrated None demonstrated Layout, LayoutGroup, LayoutLayer, ScreenFontStyle, ScreenGroup
  • Mantis 1258
  • Implementation problematic
  • Overlaps with HTML5/MAR
  • Deprecate X3Dv4.0
  • Revisit in X3Dv4.1

Requirements and References

  1. X3D v4 Strategy provides "big picture" overview of Web3D Consortium activities.
  2. X3D v4 Implementation Status is this document, which tracks overall progress.
  3. X3D version 4 Development lists numerous technical goals and requirements, each graduating to this document.
  4. Web3D Standards Adoption Process is working satisfactorily, collaboration is a powerful mechanism for success.
  5. Web3D Consortium Github Repository is available to members for editing draft X3Dv4 specification.

Team Efforts

All technical issues are advancing satisfactorily with steady progress. Greater participation speeds progress.

  • Web3D member-only information is carefully noted and separately published on x3d@web3d.org mailing list.
  • X3D working group weekly meeting minutes are primarily posted publicly to build understanding and momentum.

For best progress, we have multiple tasks pending and welcome all participation.  Each new contributor is valued and will benefit also.

  • Dr. Dick Puk and Dr. Don Brutzman: ISO specification drafts and revisions on member-only github site.
  • Dr. Nicholas Polys: Medical and Heritage working groups.
  • Dr. Vince Marchetti: Design Printing and Scanning (DPS) Working Group.
  • Dr. Michalis Kamburelis: glTF, lighting, physically based materials, shaders, additional advanced topics.
  • Dr. Andreas Plesch: software development trees, testing X_ITE and X3DOM with HTML browsers.
  • Holger Seelig: X_ITE player and Titania authoring tool.
  • Dr. Kwan Hee Yoo: Projective Texture Mapping (PTM) component.
  • Ander Arbelaiz and Dr. Nicholas Polys: Volume rendering component.
  • Dr. Athanasios Malamos and Efi Lakka:  Audio and sound improvements.
  • Dr. Jakub Flotynski, Dr. Athansios Malamos, Dr. Leslie Sikos and Dr. Don Brutzman: X3D Semantic Web Ontology. 
  • WebXR representative needed.

X3D File Encodings and Programming Language Bindings

The X3D Architecture is mappable with equivalent power in multiple file encodings and multiple programming languages.  We are carefully tracking X3D support both in X3Dv3.3 and X3Dv4.0, so that version 4 updates can proceed immediately and compatibly as X3Dv4 solidifies. Much work continues.  To learn more: