<div dir="auto">The only real problem I’ve discovered is some .gltf and .glb files require an EnvironmentLight outside the glTF file in the X3D file in Holger’s browsers (create3000). I believe this is well documented.</div><div dir="auto"><br></div><div dir="auto"><br></div><div dir="auto">Holger also has more support for Khronos PBR (not sure if it’s OpenPBR) than X3D4.</div><div><br><div class="gmail_quote gmail_quote_container"><div dir="ltr" class="gmail_attr">On Wed, Apr 30, 2025 at 7:54 PM Brutzman, Donald (Don) (CIV) via x3d-public <<a href="mailto:x3d-public@web3d.org">x3d-public@web3d.org</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
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Thanks Joe. Looks pretty spectacular!</div>
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Given that these are .glb (glTF binary) models, I suspect that X3D4-capable browsers might be able to load them too via the X3D Inline node. Nothing forbids that...</div>
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Looking ahead, if we want to formalize support for things like OpenPBR and a variety of glTF extensions in X3D 4.1 someday, that will likely be straightforward to accomplish when the time comes.</div>
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Have fun with advanced rendering in glTF and X3D! 🙂</div>
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<p style="margin:0in;font-family:Calibri,sans-serif;font-size:11pt"><span style="font-family:"Courier New";font-size:9pt">all the best, Don</span></p>
<p style="margin:0in;font-family:Calibri,sans-serif;font-size:11pt"><span style="font-family:"Courier New";font-size:9pt">--</span></p>
<p style="margin:0in;font-family:Calibri,sans-serif;font-size:11pt"><span style="font-family:"Courier New";font-size:9pt">Don Brutzman Naval Postgraduate School, Code USW/Br <a href="mailto:brutzman@nps.edu" target="_blank">brutzman@nps.edu</a></span></p>
<p style="margin:0in;font-family:Calibri,sans-serif;font-size:11pt"><span style="font-family:"Courier New";font-size:9pt">Watkins 270, MOVES Institute, Monterey CA 93943-5000 USA +1.831.656.2149</span></p>
<p style="margin:0in;font-family:Calibri,sans-serif;font-size:11pt"><span style="font-family:"Courier New";font-size:9pt">X3D graphics, virtual worlds, navy robotics <a href="https://faculty.nps.edu/brutzman" target="_blank">https://faculty.nps.edu/brutzman</a></span></p>
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<b>From:</b> x3d-public on behalf of Joe D Williams via x3d-public<br>
<b>Sent:</b> Wednesday, April 30, 2025 1:03 PM<br>
<b>To:</b> <a href="mailto:x3d-public@web3d.org" target="_blank">x3d-public@web3d.org</a><br>
<b>Cc:</b> Joe D Williams<br>
<b>Subject:</b> [x3d-public] MaterialX and glTF PBR </div>
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<div style="font-size:11pt">You can view the Chess Set in the Web MaterialX viewer here:<br>
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<a href="https://academysoftwarefoundation.github.io/MaterialX/" id="m_4325423795388630036LPlnk813755" target="_blank">https://academysoftwarefoundation.github.io/MaterialX/</a></div>
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<a id="m_4325423795388630036LPUrlAnchor261262" href="https://academysoftwarefoundation.github.io/MaterialX/" style="text-decoration:none;color:var(--themePrimary)" target="_blank">MaterialX Web Viewer - GitHub Pages</a></div>
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MaterialX Web Viewer - GitHub Pages ... Material: ...</div>
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<a href="http://academysoftwarefoundation.github.io" target="_blank">academysoftwarefoundation.github.io</a></div>
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Pick material: standard_surface_chess_set.mtlx<br>
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Pick geometry: chess_set.glb<br>
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<div style="font-size:11pt">OpenPBR spec: <span style="color:rgb(0,0,0)">
<a href="https://academysoftwarefoundation.github.io/OpenPBR/" id="m_4325423795388630036LPlnk263054" target="_blank">https://academysoftwarefoundation.github.io/OpenPBR/</a></span></div>
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<a id="m_4325423795388630036LPUrlAnchor634758" href="https://academysoftwarefoundation.github.io/OpenPBR/" style="text-decoration:none;color:var(--themePrimary)" target="_blank">academysoftwarefoundation.github.io</a></div>
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Unfortunately, the original model suffers from artifacts and also does not conserve energy (i.e. is too dark). We thus opt to define the diffuse BRDF to be a popular improved version of Oren-Nayar introduced by Fujii [#Fujii2012], augmented with a simple analytical,
reciprocal energy compensation term: \begin{eqnarray} \label{EON_brdf} f_\mathrm{diffuse}(\omega_i, \omega_o) = f_\mathrm{ON ...</div>
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<a href="http://academysoftwarefoundation.github.io" target="_blank">academysoftwarefoundation.github.io</a></div>
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from MSF 3D Asset Interoperability using USD and glTF working group<br>
feature MaterialX status and glTF PBR status and collaborations<br>
Continued serious work on Shader Translation Graphs to map between models.<br>
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Thanks,<br>
Joe<br>
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