Hi @tibotiber, my integration was never fully completed + Mapbox switched to an non-OSS license in December 2020 so if I had to do it again I will probably have a look at maplibre. They already have a working example : Add a 3D model with babylon.js - MapLibre GL JS
Not every framework are backward compatible like babylonJS 
so maybe the API has changed since idk. Did you tried to put your mapbox key in the examples ? Maybe it’s still working !