Now with the upgrades to the GLTF exporter in blender 3.3, I had attempted to export sheen textures.

But the sheen & sheen roughness values only show black so no sheen is reflected on the model while viewing on <https://github.khronos.org/glTF-Sample-Viewer-Release/>

[![enter image description here](https://i.stack.imgur.com/M0Aht.jpg)](https://i.stack.imgur.com/M0Aht.jpg)

[![enter image description here](https://i.stack.imgur.com/vGz13.jpg)](https://i.stack.imgur.com/vGz13.jpg)

The sheen colour texture exports correctly.▼

[![enter image description here](https://i.stack.imgur.com/BSmha.jpg)](https://i.stack.imgur.com/BSmha.jpg)

Here's my Shader setup which I have tried to follow from the documentation.▼

[![enter image description here](https://i.stack.imgur.com/oPR7J.jpg)](https://i.stack.imgur.com/oPR7J.jpg)

If anybody could tell me what I'm doing wrong that would be great.

You can grab the Blender and GLB files from here. <http://filedropper.com/KYePNkbG>

Edit: If the filedropper link doesnt work. <https://we.tl/t-Ut8sBHHWVM>