Material property IsTwoSided not work

[Renan Faccin]

When I export a WPF 3D model to GLB format, and to open it later in a viewer like Babylon.JS/glTF Viewer some sides are hidden it when rotate camera. The Assimp library has a property for enable double side, IsTwoSided property, however, is not work when I set true value.

Code snippet:

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Follows the evidence of the problem:

Original model

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Model opened in Babylon.JS viewer

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Would appreciate if you can help me.

[Nicholas Woodfield]

Most likely the exporter is not honoring that material property. I’d also verify that the viewer you’re using honors the property, it’s importer may ignore it.

Please file your defect on the native Assimp issue tracker:

https://github.com/assimp/assimp

[Nicholas Woodfield]

I see this was reported on assimp's tracker. It looks like the problem is due to them using c++ bool rather than aiBool (4 bytes) in the gltf importer.