Hey 
Have Ghost City and Village 3d scenes(one from CGTRader, other Turbo Squid) and want to use them as backdrop for:
https://playground.babylonjs.com/#TDCPJK#22 (ghost city)
https://playground.babylonjs.com/#F87NI3#16 (village)
Repo where scenes are stored:
Is it as simple converting a whole 3d scene to BJS as it is a character model?
Thank ya 
My usual way to do it is to open the models in Blender, check if everything is all right and export it as GLB. Take care that the default FXB importer in Blender doesn’t handle everything well. There’s a plugin called “Better Fbx Importer & Exporter” that works perfectly. GitHub - facebookincubator/FBX2glTF: A command-line tool for the conversion of 3D model assets on the FBX file format to the glTF file format. might work for you too.