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**To Reproduce** Steps to reproduce the behavior: 1. Try to import any glTF asset that has above types as accessors. For example, you can export a glTF from Blender with...

Make glTF PBR thickness input control thin-walledness

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Attempts to fix #1936. Needs some testing.

Suggestion: provide string constants for all types

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Currently, many applications that use MaterialX repeatedly write out type strings: ```cpp const bool colorInput = (type == "color3" || type == "color4"); ``` One problem with this is that...

As described in the initial glTF PBR PR #861, thin-walled support was not implemented due to technological limitations. With the recent changes in MaterialX 1.39 (PR #1866), it seems that...

Just a heads-up that following functionality is deprecated in C++ 20: ``` D:\a\gatling\gatling\extern\openexr\src\lib\IlmThread\IlmThreadPool.cpp(119,52): warning C4996: 'std::atomic_load': warning STL4029: std::atomic_*() overloads for shared_ptr are deprecated in C++20. The shared_ptr specialization of...

Apparently `codecvt_utf8` has been [deprecated in C++17](https://en.cppreference.com/w/cpp/header/codecvt): ``` [ 82%] Building CXX object extern/openexr/src/lib/OpenEXR/CMakeFiles/OpenEXR.dir/ImfMisc.cpp.o /Users/pablode/Work/gatling/extern/openexr/src/lib/OpenEXR/ImfMisc.cpp:1990:31: warning: 'codecvt_utf8' is deprecated [-Wdeprecated-declarations] std::wstring_convert converter; ^ /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX14.4.sdk/usr/include/c++/v1/codecvt:187:28: note: 'codecvt_utf8' has been explicitly marked...

UsdPreviewSurface shader def documentation is not parsed into Sdr?

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### Description of Issue The MaterialX `doc` attribute is parsed into the Sdr help string, thanks to PR #1895. For instance, for the node def [ND_convert_float_surfaceshader](https://github.com/AcademySoftwareFoundation/MaterialX/blob/fd38f07c56ab44b94b2f09f1d00c009ed09a8c0c/libraries/stdlib/stdlib_defs.mtlx#L4528), we get ``` >>>...

Vertex remapping/reindexing with approximate equality

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As the README states, > meshopt_generateVertexRemap uses binary equivalence of vertex data, which is generally a reasonable default; however, in some cases some attributes may have floating point drift causing...