Asset Requirements – Sharing – Documentation – Facebook …

We also recommend that you view our GLB Tutorial, which has instructions for creating GLB files using popular 3D creation tools, as well as instructions for converting FBX files to GLB files. Asset Authoring Flow. This post by The Khronos Group is a good example of a glTF authoring flow. Reducing Asset Size. Use lightweight, realtime modeling …

https://developers.facebook.com/docs/sharing/3d-posts/asset-requirements