Luca Morreale

Thanks Nicholas! I did implement that [here](https://github.com/luca-morreale/polyscope/tree/custom). My implementation does not entirely follow your guidelines, unfortunately. (implemented shortly after posting the question) Feel free to copy-paste code from it as...

That's amazing, thank you!

Hello, does your mesh have a cut or is it watertight? Could you please send it to me?

The mesh you sent me does not have a boundary, it is watertight, hence it does not have a boundary. You need to cut it open before you can process...