Hi Joerg,

re:
> The problem is that I'm looking for a solution that is also working for closed curves that were
> designed with a Freeform line. Here the the line behind the outline needs to be a child of
> the outline. Next line needs to be a child of the first child, etc.

Do you have an example drawing of this type?


> I had in mind that such a function was/is existing in MoI or as script from Max Smirnov.

There is an OffsetMultiStep script here:
https://moi3d.com/forum/index.php?webtag=MOI&msg=4898.19

But it isn't very much like a continuous spiral.

- Michael