The material rendering effect of this GLTF 3D model is incorrect

[chengdz]

plane.zip

[timoore]

Can you say easily what's wrong with it?

[chengdz]

The PBR material effect is incorrect. This is the effect displayed in babylonjs

[timoore]

Sorry for the delay in getting back to you. This model uses the KHR_materials_pbrSpecularGlossiness extension, which isn't supported by vsgCs' glTF loader.