I found that the line information in glb did not parse well, I compared the editor, babylon.js and playCanvas .js of three.js, they all display lines normally, and the link below is the glb file I tested.
Importing lines is not supported at the moment. The edges you can see are auto generated from the 3D model with the given threshold, so this is why they are not perfect.
Describe the solution you'd like
I found that the line information in glb did not parse well, I compared the editor, babylon.js and playCanvas .js of three.js, they all display lines normally, and the link below is the glb file I tested.
https://drive.google.com/file/d/1w-lugrzDi8uICOl0Lsk5hPv18XbTifUL/view?usp=sharing https://drive.google.com/file/d/1KG9UldHQtF7by6hR3wyCdzxXqrW8CYec/view?usp=sharing