Follow this guide to create and export your glTF files:

Export all your variations to zip files:

Extract and put the files into a single folder

(optional) If you used the same mesh.materials you can optimise it by only having a single .bin  file.

(optional) You can add thumbnails of each variation by adding a .jpg  or .png  file with the same name as the .gltf  file.

Zip all these files into a single file and upload to Plattar.

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