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<p><font color="#189e22"><i>Removing all distributions and using
only Communications and Ecosystem. If someone important is not
on one of those lists, then encourage them to join. Both lists
are member-only.</i></font></p>
<p>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.</p>
<p>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.</p>
<p>Leonard Daly</p>
<p><br>
</p>
<p><br>
</p>
<div class="moz-cite-prefix">On 8/22/2025 10:01 AM, Don Brutzman
wrote:<br>
</div>
<blockquote type="cite"
cite="mid:CABx5f7cZg=MHsG5HZEZu6+ZiMTApL-mZwpzJvqNf9YTCJ8wFrA@mail.gmail.com">
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<div>[copying our primary implementers, Michalis Holger Andreas
and Doug]</div>
<div><br>
</div>
Thanks for sharing this Nicholas. Lots of cool examples, most
of which ought to be "do-able" in X3D4!
<div><br>
</div>
<div>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.</div>
<div><br>
</div>
<div>Meanwhile there are proposed additions to X3D 4.1 for
several new glTF-related nodes: EnvironmentLight and Tangent.</div>
<div>
<ul>
<li>Mantis 1336: 17.4.2 EnvironmentLight - Khronos glTF
extension for image based lighting</li>
<li><a href="https://mantis.web3d.org/view.php?id=1336"
moz-do-not-send="true" class="moz-txt-link-freetext">https://mantis.web3d.org/view.php?id=1336</a></li>
<li>Specification editors are ready to add this to X3D 4.21
draft</li>
<li>Michalis, can we please schedule that long-planned
meeting to discuss?</li>
</ul>
and<br>
<ul>
<li>Mantis 1496: add Tangent node to support advanced
rendering capabilities of glTF</li>
<li><a href="https://mantis.web3d.org/view.php?id=1496"
moz-do-not-send="true" class="moz-txt-link-freetext">https://mantis.web3d.org/view.php?id=1496</a></li>
</ul>
</div>
<div>If there are technical comments, that will be helpful for
all concerned. Thanks in advance for all scrutiny.</div>
<div><br>
</div>
<div>all the best, Don</div>
</div>
<br>
<div class="gmail_quote gmail_quote_container">
<div dir="ltr" class="gmail_attr">On Tue, Aug 19, 2025 at
7:08 PM Polys, Nicholas <<a href="mailto:npolys@vt.edu"
moz-do-not-send="true" class="moz-txt-link-freetext">npolys@vt.edu</a>>
wrote:<br>
</div>
<blockquote class="gmail_quote"
style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
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<a id="m_6041363334118525682LPlnk399082"
href="https://www.khronos.org/blog/gltf-interactivity-extensions-approach-finalization-your-feedback-needed"
target="_blank" moz-do-not-send="true"
class="moz-txt-link-freetext">https://www.khronos.org/blog/gltf-interactivity-extensions-approach-finalization-your-feedback-needed</a></div>
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<a
href="https://www.khronos.org/blog/gltf-interactivity-extensions-approach-finalization-your-feedback-needed"
id="m_6041363334118525682LPImageAnchor762253" target="_blank"
moz-do-not-send="true"><img width="160"
style="display: block;" height="160"
alt=""
id="m_6041363334118525682LPThumbnailImageId762253"
src="https://www.khronos.org/assets/uploads/apis/gltf-Square.png"
moz-do-not-send="true"></a></div>
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style="font-size:21px;font-weight:300;margin-right:8px;font-family:wf_segoe-ui_light,"Segoe UI Light","Segoe WP Light","Segoe UI","Segoe WP",Tahoma,Arial,sans-serif;margin-bottom:12px"
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<a
style="text-decoration:none;color:var(--themePrimary)"
href="https://www.khronos.org/blog/gltf-interactivity-extensions-approach-finalization-your-feedback-needed"
id="m_6041363334118525682LPUrlAnchor762253" target="_blank"
moz-do-not-send="true">glTF Interactivity
Extensions Approach Finalization: Your
Feedback Needed! - Khronos Blog - The
Khronos Group</a></div>
<div
style="font-size:14px;max-height:100px;color:rgb(102,102,102);font-family:wf_segoe-ui_normal,"Segoe UI","Segoe WP",Tahoma,Arial,sans-serif;margin-bottom:12px;margin-right:8px;overflow:hidden"
id="m_6041363334118525682LPDescription762253">
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 ...</div>
<div
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<a href="http://www.khronos.org"
target="_blank" moz-do-not-send="true">www.khronos.org</a></div>
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style="font-family:Aptos,Aptos_EmbeddedFont,Aptos_MSFontService,Calibri,Helvetica,sans-serif;font-size:12pt;color:rgb(0,0,0)">
<a href="https://github.khronos.org/glTF-Assets/"
target="_blank" moz-do-not-send="true"
class="moz-txt-link-freetext">https://github.khronos.org/glTF-Assets/</a></div>
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id="m_6041363334118525682LPBorder_GTaHR0cHM6Ly9naXRodWIua2hyb25vcy5vcmcvZ2xURi1Bc3NldHMv">
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style="padding:12px 36px 12px 12px;width:100%;border-width:1px;border-style:solid;border-color:rgb(200,200,200);border-radius:2px"
role="presentation"
id="m_6041363334118525682LPContainer597778">
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style="font-size:21px;font-weight:300;margin-right:8px;font-family:wf_segoe-ui_light,"Segoe UI Light","Segoe WP Light","Segoe UI","Segoe WP",Tahoma,Arial,sans-serif;margin-bottom:12px"
id="m_6041363334118525682LPTitle597778">
<a
style="text-decoration:none;color:var(--themePrimary)"
href="https://github.khronos.org/glTF-Assets/"
id="m_6041363334118525682LPUrlAnchor597778" target="_blank"
moz-do-not-send="true">Sample Assets |
Khronos</a></div>
<div
style="font-size:14px;max-height:100px;color:rgb(102,102,102);font-family:wf_segoe-ui_normal,"Segoe UI","Segoe WP",Tahoma,Arial,sans-serif;margin-bottom:12px;margin-right:8px;overflow:hidden"
id="m_6041363334118525682LPDescription597778">
Khronos Sample Assets Website</div>
<div
style="font-size:14px;font-weight:400;color:rgb(166,166,166);font-family:wf_segoe-ui_normal,"Segoe UI","Segoe WP",Tahoma,Arial,sans-serif"
id="m_6041363334118525682LPMetadata597778">
<a href="http://github.khronos.org"
target="_blank" moz-do-not-send="true">github.khronos.org</a></div>
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<a
href="https://www.khronos.org/blog/introducing-asset-creation-guidelines-2.0-siggraph-2025"
target="_blank" moz-do-not-send="true"
class="moz-txt-link-freetext">https://www.khronos.org/blog/introducing-asset-creation-guidelines-2.0-siggraph-2025</a></div>
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style="font-family:Aptos,Aptos_EmbeddedFont,Aptos_MSFontService,Calibri,Helvetica,sans-serif;font-size:12pt;color:rgb(0,0,0)">
<br>
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<div
style="width:100%;margin-top:16px;margin-bottom:16px;max-width:800px;min-width:424px"
id="m_6041363334118525682LPBorder_GTaHR0cHM6Ly93d3cua2hyb25vcy5vcmcvYmxvZy9pbnRyb2R1Y2luZy1hc3NldC1jcmVhdGlvbi1ndWlkZWxpbmVzLTIuMC1zaWdncmFwaC0yMDI1">
<table
style="padding:12px 36px 12px 12px;width:100%;border-width:1px;border-style:solid;border-color:rgb(200,200,200);border-radius:2px"
role="presentation"
id="m_6041363334118525682LPContainer206394">
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<div
style="margin-right:12px;height:160px;overflow:hidden"
id="m_6041363334118525682LPImageContainer206394">
<a
href="https://www.khronos.org/blog/introducing-asset-creation-guidelines-2.0-siggraph-2025"
id="m_6041363334118525682LPImageAnchor206394" target="_blank"
moz-do-not-send="true"><img
style="display: block;" width="160"
height="160" alt=""
id="m_6041363334118525682LPThumbnailImageId206394"
src="https://www.khronos.org/assets/uploads/blogs/3DComm-Square_1.png"
moz-do-not-send="true"></a></div>
</td>
<td style="width:100%">
<div
style="font-size:21px;font-weight:300;margin-right:8px;font-family:wf_segoe-ui_light,"Segoe UI Light","Segoe WP Light","Segoe UI","Segoe WP",Tahoma,Arial,sans-serif;margin-bottom:12px"
id="m_6041363334118525682LPTitle206394">
<a
style="text-decoration:none;color:var(--themePrimary)"
href="https://www.khronos.org/blog/introducing-asset-creation-guidelines-2.0-siggraph-2025"
id="m_6041363334118525682LPUrlAnchor206394" target="_blank"
moz-do-not-send="true">Introducing Asset
Creation Guidelines 2.0 for Commerce-Ready
glTF Assets - Khronos Blog - The Khronos
Group</a></div>
<div
style="font-size:14px;max-height:100px;color:rgb(102,102,102);font-family:wf_segoe-ui_normal,"Segoe UI","Segoe WP",Tahoma,Arial,sans-serif;margin-bottom:12px;margin-right:8px;overflow:hidden"
id="m_6041363334118525682LPDescription206394">
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
...</div>
<div
style="font-size:14px;font-weight:400;color:rgb(166,166,166);font-family:wf_segoe-ui_normal,"Segoe UI","Segoe WP",Tahoma,Arial,sans-serif"
id="m_6041363334118525682LPMetadata206394">
<a href="http://www.khronos.org"
target="_blank" moz-do-not-send="true">www.khronos.org</a></div>
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--</div>
<div
style="direction:ltr;text-align:left;text-indent:0px;background-color:rgb(255,255,255);margin:0px;font-size:9.75pt;color:rgb(34,34,34)">
<span style="font-family:Arial,Helvetica,sans-serif">Nicholas
F. Polys, Ph.D.<br>
<br>
Director of Visual Computing<br>
Virginia Tech Research Computing<br>
</span><span
style="font-family:Arial,Helvetica,sans-serif,serif,EmojiFont"><br>
Department Editor: @theSource</span></div>
<div
style="direction:ltr;text-align:left;text-indent:0px;background-color:rgb(255,255,255);margin:0px;font-family:Arial,Helvetica,sans-serif,serif,EmojiFont;font-size:9.75pt;color:rgb(34,34,34)">
IEEE Computer Graphics & Applications</div>
<div
style="direction:ltr;text-align:left;text-indent:0px;font-family:Arial,Helvetica,sans-serif;font-size:9.75pt;color:rgb(34,34,34)">
<br>
Affiliate Professor<br>
Virginia Tech Department of Computer Science</div>
<div
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<a style="color:rgb(17,85,204)"
href="https://people.cs.vt.edu/~npolys/"
target="_blank" moz-do-not-send="true">https://people.cs.vt.edu/~npolys/ </a></div>
</div>
</div>
_______________________________________________<br>
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</blockquote>
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<br>
<fieldset class="moz-mime-attachment-header"></fieldset>
<pre wrap="" class="moz-quote-pre">_______________________________________________
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</pre>
</blockquote>
<div class="moz-signature">-- <br>
<b>Leonard Daly</b><br>
WebServices, Web3D Consortium<br>
President, Daly Realism - <i>Creating the Future</i><br>
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