Is it possible to use the MOZ Lightmap GLTF Extension with vanilla threejs?

[kitaedesigns]

I'd like to use Lightmaps in Threejs exported from Blender, I know I could do this in Threejs with a separate texture but wondering if I could also just use the MOZ Lightmap GLTF Extension instead. Seems like it has solved a lot of issues with the Lightmaps being washed out, using the second UV channel, attaching the right Lightmap to the right mesh etc.

[keianhzo]

It is if you add the extension to the vanilla ThreeJS glTF loader. See here: https://github.com/mozilla/hubs/blob/bf6ed63453a8ac37bbabc3eb054aa05844b7d41e/src/components/gltf-model-plus.js#L635