Hi Pilou,

> But curious than a star with edges rounded "joined" who is
> also a closed curve like a circle don't give the same result ?

A curve like you are describing will be made up of multiple segments, you should be able to see them by using Edit/Separate on the rounded-edge star.

That's the difference between it and the circle one, the circle one only has one segment which makes for one trim edge when you cut with it, the multi-segment curve will make multiple edges when you cut with it.

- Michael