[Bug] GLTF: Scenegraph json not iterable about loaders.gl

[donmccurdy]

The three warnings appearing before the final error are the important bits here — these are a glTF 1.0 files, embedded in an older version of the B3DM format. LoadersGL requires glTF 2.0. Perhaps also relevant, the EXT_texture_webp extension itself requires glTF 2.0, so there may be some issues with this tileset if it has combined glTF 1.0 with the EXT_texture_webp extension.

[ibgreen]

There is partial support for "auto-upconverting" glTF 1.0 files, but perhaps it requires enabling a GLTFLoader option, I don't recall... And it doesn't upconvert everything in glTF 1.0 so whether it works depends on the file. Looking at the error, it could be that a simple additional conversion step for textures would enable this particular file to load.