When I tried dash-vtk with OBJ reader, I failed to find a api for MTL upload
txt_content = None
with open(obj_file, 'r') as file:
txt_content = file.read()
content = dash_vtk.View([
dash_vtk.GeometryRepresentation([
dash_vtk.Reader(
vtkClass="vtkOBJReader",
parseAsText=txt_content,
),
]),
])