[X3D-Ecosystem] [communications] Comments from Web3D C?

[Web3D WebServices]

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glTF does not have a specification of environment lights. This is out of 
scope of the current glTF definitions because it makes the model 
non-reusable as it specifies lighting conditions for a particular point 
in space. It is also necessary to use HDR images to achieve high-quality 
lighting of the model and get proper light interactions.

Khronos anticipates that the Interactivity specification will be in 
Release Candidate state by the end of (Northern Hemisphere) Summer. 
Release Candidate is the final state before ratification review begins. 
It is used to indicate to the community that the WG believes that the 
specification for that extension is stable and will not change. It is 
used to allow implementers to start work against a fixed specification 
and time for the WG to ensure all requirements are met to enter 
ratification. Ratification takes a minimum of 6 weeks and concludes with 
the Khronos Board approving the specification.

Leonard Daly



On 8/22/2025 10:01 AM, Don Brutzman wrote:
> [copying our primary implementers, Michalis Holger Andreas and Doug]
>
> Thanks for sharing this Nicholas.  Lots of cool examples, most of 
> which ought to be "do-able" in X3D4!
>
> My expectation has been that they need to stabilize the Interaction 
> component(s) for glTF for us to correspondingly define 
> pretty-straightforward mappings from X3D interaction/animation to glTF.
>
> Meanwhile there are proposed additions to X3D 4.1 for several new 
> glTF-related nodes:  EnvironmentLight and Tangent.
>
>   * Mantis 1336: 17.4.2 EnvironmentLight - Khronos glTF extension for
>     image based lighting
>   * https://mantis.web3d.org/view.php?id=1336
>   * Specification editors are ready to add this to X3D 4.21 draft
>   * Michalis, can we please schedule that long-planned meeting to discuss?
>
> and
>
>   * Mantis 1496: add Tangent node to support advanced rendering
>     capabilities of glTF
>   * https://mantis.web3d.org/view.php?id=1496
>
> If there are technical comments, that will be helpful for all 
> concerned.  Thanks in advance for all scrutiny.
>
> all the best, Don
>
> On Tue, Aug 19, 2025 at 7:08 PM Polys, Nicholas <npolys at vt.edu> wrote:
>
>     https://www.khronos.org/blog/gltf-interactivity-extensions-approach-finalization-your-feedback-needed
>     <https://www.khronos.org/blog/gltf-interactivity-extensions-approach-finalization-your-feedback-needed>
>     	
>     glTF Interactivity Extensions Approach Finalization: Your Feedback
>     Needed! - Khronos Blog - The Khronos Group
>     <https://www.khronos.org/blog/gltf-interactivity-extensions-approach-finalization-your-feedback-needed>
>     In June 2024, the Khronos 3D Formats Working Group released the
>     glTF 2.0 Interactivity draft extension (KHR_interactivity) for
>     public review and comment. Now, thanks to valuable community
>     feedback and almost a year of continued development, we are
>     nearing the finish line on releasing KHR_interactivity together
>     with a set of companion extensions. These extensions provide a
>     straightforward ...
>     www.khronos.org <http://www.khronos.org>
>
>     https://github.khronos.org/glTF-Assets/
>
>     Sample Assets | Khronos <https://github.khronos.org/glTF-Assets/>
>     Khronos Sample Assets Website
>     github.khronos.org <http://github.khronos.org>
>
>     https://www.khronos.org/blog/introducing-asset-creation-guidelines-2.0-siggraph-2025
>
>     <https://www.khronos.org/blog/introducing-asset-creation-guidelines-2.0-siggraph-2025>
>     	
>     Introducing Asset Creation Guidelines 2.0 for Commerce-Ready glTF
>     Assets - Khronos Blog - The Khronos Group
>     <https://www.khronos.org/blog/introducing-asset-creation-guidelines-2.0-siggraph-2025>
>     As the 3D commerce industry evolves, artists and brands alike need
>     clear, up-to-date guidance to efficiently produce optimized
>     assets. Today, we're excited to announce the launch of version 2.0
>     of the Asset Creation Guidelines—a comprehensive and continuously
>     updated resource designed to help 3D artists create
>     photorealistic, commerce-ready assets for web, XR, games, and
>     other real-time 3D ...
>     www.khronos.org <http://www.khronos.org>
>
>
>
>
>     --
>     Nicholas F. Polys, Ph.D.
>
>     Director of Visual Computing
>     Virginia Tech Research Computing
>
>     Department Editor: @theSource
>     IEEE Computer Graphics & Applications
>
>     Affiliate Professor
>     Virginia Tech Department of Computer Science
>     https://people.cs.vt.edu/~npolys/ <https://people.cs.vt.edu/~npolys/>
>     _______________________________________________
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>     communications at web3d.org
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>
>
> _______________________________________________
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-- 
*Leonard Daly*
WebServices, Web3D Consortium
President, Daly Realism - /Creating the Future/
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