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Connect geometry_thin_walled to surface in OpenPBR#2759

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jstone-lucasfilm merged 3 commits intoAcademySoftwareFoundation:mainfrom
jreichel-nvidia:fix-openpbr-thin_walled-isolated
Feb 18, 2026
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Connect geometry_thin_walled to surface in OpenPBR#2759
jstone-lucasfilm merged 3 commits intoAcademySoftwareFoundation:mainfrom
jreichel-nvidia:fix-openpbr-thin_walled-isolated

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@jreichel-nvidia
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And make it uniform.
See also AcademySoftwareFoundation/OpenPBR#250.

@jreichel-nvidia jreichel-nvidia marked this pull request as ready for review January 27, 2026 14:40
@jstone-lucasfilm
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This is definitely the right path forward, @jreichel-nvidia, but I wonder whether this should wait on the formal release of OpenPBR 1.2, which is the version of OpenPBR that will contain this improvement:

https://github.com/AcademySoftwareFoundation/OpenPBR/tree/dev_1.2

@jreichel-nvidia
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Hmm, I see. Do you know by chance when this release is planned to happen?

@jreichel-nvidia
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Since several parties are now using MaterialX with this patch, I wonder whether we shouldn't merge it even though OpenPBR 1.2 is not yet released ...

@jstone-lucasfilm
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I'm inclined to agree, @jreichel-nvidia, and perhaps we should think of this change as a bug fix to the MaterialX graph for OpenPBR Surface, rather than a design change that requires versioning of the shading model.

I'm CC'ing @AdrienHerubel and @theblackunknown for their thoughts, and let's see if there's general agreement on this idea.

@AdrienHerubel
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I agree, it is a bugfix of the graph and in sync with future versions of the specification. It is fine to get it in.

@jstone-lucasfilm jstone-lucasfilm changed the title OpenPBR: Connect geometry_thin_walled flag to <surface>. Connect geometry_thin_walled flag to surface in OpenPBR Feb 18, 2026
@jstone-lucasfilm jstone-lucasfilm changed the title Connect geometry_thin_walled flag to surface in OpenPBR Connect geometry_thin_walled to surface in OpenPBR Feb 18, 2026
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Thanks for the fix, @jreichel-nvidia!

@jstone-lucasfilm jstone-lucasfilm merged commit d9975a1 into AcademySoftwareFoundation:main Feb 18, 2026
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