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glTF 2.0 Extensions in MPEG and 3GPP
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July 13, 2023

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glTF Virtual Meetups

These unique Khronos led events provide 3D developers and animators an opportunity to meet up and learn how to get the most from using the glTF 3D format in their applications, products, and tools. Each event includes three or four speakers who showcase their use of glTF, as well as sharing any advice they have on best practices and tools. Each session concludes with an open “Ask the Experts” Q&A session. These live virtual meetups are FREE to attend, and registration is required to join. They use the Zoom Webinar platform, and the recordings are posted online.


  • Thursday, July 13, 2023
  • 10:00 PDT | 1:00 EDT | 7:00 CET
  • Duration: Approximately 60 minutes



glTF 2.0 Extensions in MPEG and 3GPP – Real-time exchange formats for 3D Experiences.

  • Presenters: Thomas Stockhammer and Imed Bouazizi
  • Immersive media applications offer experiences which immerse the user in a virtual or hybrid environment and offer more degrees of freedom than with traditional 2D video content. Platforms providing immersive media often enable the user to interact with the content and/or with other users in shared virtual or mixed reality spaces. To address the need for an interoperable cross-platform exchange format and interactive solution for such 3D environments, ISO/IEC JTC 1/SC29/WG03 MPEG Systems has standardized a Scene Description framework in ISO/IEC 23090-14, that serves as an entry point format to compose rich 3D scenes, referencing and positioning 2D and 3D assets in the scene, blending with the real world, rich interactivity and providing real-time media delivery. MPEG-I Scene Description is primarily defined as a set of well-defined extensions to Khronos glTF 2.0 specification. glTF2.0 provides a widely-deployed, solid and efficient baseline for exchangeable and interoperable scene descriptions toward resource constrained devices such as see-through HMD and glasses. However, in the main specification of glTF gaps had been identified related to the integration of real-time media such as 2D and 3D video assets, audio or haptics. The presentation will provide an overview of the developed extensions, use cases and applications, initial implementations as well the application for usage in mobile delivery in context of 3GPP-defined specifications. For details, refer to the White Paper on MPEG-I Scene Description.

Q&A session will be held after the presentation.

Future glTF Meetups

If you are interested in giving a glTF presentation showcasing your application, products, or tool using glTF, please let us know. We have created a simple application form to help submit your proposal. Live demonstrations are strongly encouraged, and speakers are generally given 10-15 minutes to speak, plus 5 minutes for Q&A

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Recent Meetups

Examples from recent meetup sessions can be found on the Khronos glTF YouTube Playlist.



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Dr. Thomas Stockhammer
Dr. Thomas Stockhammer
Dr. Imed Bouazizi
Dr. Imed Bouazizi

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