Hi~
I have a trouble when I want to export a model from Babylon. I store some information in uv3 to achieve some effect, but I find GLB export can’t export uv3~8 (I had setting export UnusedUVs true).
Thanks for each help 
This is PG:Babylon.js Playground
@bghgary does GLTF support UV3 and beyond?
Loader supports, but not the exporter. Babylon.js/glTFExporter.ts at master · BabylonJS/Babylon.js (github.com)
It should be relatively easy to add. Does anyone want to contribute a fix?
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