> What is the good option : each curve must have jonction's points to the
> others or like this exemple no jonction point?

As far as intersection points go, I think that should be close enough.

But right now this is running into the problem at the "closed seam", same kind of thing as the previous bug that Steph sent. I'm going to be working on this one but it might not be ready for the next beta, maybe the one after that.

- Michael