Hi, I think the bug still exists with PBRMaterials (Specular/Glossiness). If I export a .glb using GLTF2Export.GLBAsync, the KHR_texture_transform is missing for Specular Glossiness PBRMaterials. Metallic Roughness PBRMaterials are working fine on the other hand. I am on 4.2.0-beta.
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