Oh, I see. I meant to say density from material density chart of material like gold, aluminium, platinum, etc outside threejs.
Yeah, it’s probably unrelated. I initially thought there is threejs function for getting the mass from the model.
You could make your own function for it with that formula getting its density from a csv file or list of keys that show the metal names and corresponding density values.
Where an argument would be the metal name to fetch its key value