Hi Pilou, Planar is not set up to analyze curve structures that have more than two curves sharing the same endpoint.

In the case that you show with the separate lines, that is arranged so that each endpoint is only connected to one other endpoint. Planar is set up to track outlines connected like this.

When you have more than one endpoint shared, Planar may try to trace an outline like this:



So for example if it took that path above, it would not make a closed loop, so no surface will be generated there.

It would take quite a lot of extra programming work to make Planar be able to properly analyze branched structures like this.

- Michael