Hello:
I downloaded a city model(fbx) from sketchfab (https://sketchfab.com/models/d60778fd8b8f4f5e9ce20f0bc506eaeb). Then, I exported babylon file through unity3d , but in the babylonjs engine is not loaded, not show error . I thought the model was too big (babylon file 80mb). However, I used the tools (https://github.com/BabylonJS/Babylon.js/tree/master/Tools/MakeIncremental) segmentation babylon file. After incremental load loading, it is still not success, not show any error. I suspect that loading is not success because the model is generated with the cityengine, but my suspicions are unfounded.