i import to sandbox my 3D model, in the sandbox i add the Metalic and the Lightmap, but when i export to glb in my server the changes miss. but the file is more hevy, i guess the Metalic and the Lightmap add to the glb but isn’t active.
Some one know what happend and how to solve this problem?
this is my 3d
when i add all the textures and elements looks like this
glTF doesn’t support light maps, so that can’t be exported without a custom glTF extension and custom code. Metallic should export (assuming you mean the metallic roughness texture).
I don’t know how to repro your problem. I downloaded your glb and the exporter seems to do fine with it.