If you KNOW that the intersection is complete and results in only planar, closed curves and you have the just the curves from the intersection operation, then it is solvable.

The curve with the largest area is the outer one, all the rest are inner.

Then again, you might have a situation where there are actually multiple “outers” containing multiple inners. So to provide for that, you will need something more complex.

Haha yes, of course. I’m just wondering if this is a case where he needs to separate those as well. Because for that I recently made a script that separates them: FindOutAndInsideCurves.py (1.8 KB)

In this script it copies your original curves and gives the new curves a different color depending on whether they are inside or outside.