How to display emissive material from gltf assets?

[harrypunk]

In blender, I created 3d models with emissive materials and exported them to a glb file. Apparently emissive materials didn't work without extra configuration:
main.rs#L20

        SceneRoot(asset_server.load(GltfAssetLabel::Scene(0).from_asset("emissive_cube.glb"))),

It seems 3d bloom should be enabled, as mentioned in #13350 , I wonder how to enable the effect for gltf assets? Do I have to add standard material to all glowing meshes in my project?