Hi Pilou,

> Yes I understand that, but it's just funny that the function
> "works" for a volume and not for "2 lines" (for my point of view) :)

For an open path curve like this, it works in an identical way for either one...

If you test with replicating a volume, just make sure it is in the same orientation as the line - for example your triangle line starts out at a slight angle so that it is aligned with the first line segment which is not exactly horizontal.

If you orient your volume in the same starting position, you should get an identical result with it as well.

If you forgot to have the same starting alignment, then certainly you will get a slight difference.

But I'm afraid that I confused things a lot more by posting that method which does not work, sorry! :)

- Michael