Hi,
I have probably very easy problem that i can’t find any solution…
I have 3 circles with points and i want to connect them to each other. I tried to change seam before interpolate curve component, but still they are twisted:
You need to flip one of the curves.
The puzzle above using three sets of curves is more complicated… Too bad the curves are missing. The best way to avoid this trouble is to create your curves differently.
By the way, Point List obviously makes no sense when there is only one point in each branch (grafted).
Thank you…so simple 
Sorry, it was a mistake to use CrvProx twice in the version with three circles. Hasty copy/pace that seems to work in this case, but it’s wrong.
P.S. Here is another way to think about this, with Loft instead of interpolated points.
The purple group results in the same twist unless you check ‘Align sections’ in loft options, which isn’t necessary on the other Loft. And even with ‘Align sections’, the shapes (and seams) are visibly different when viewed separately. The Volume outputs confirm that.
Thant You Joseph. But my main goal in this case is to have curves, and after that i’m making pipes. I’m jewelry designer so it will be ring made by pipes
25 days later
Perhaps you don’t realize that the wires you are using in your jewelry can be considered curves on a surface (“Iso Curves”). Or perhaps you don’t consider the differences between the two methods of generating a “base surface” significant?
One relies on loft option ‘Align sections’ which flips section curves as needed without adjusting seams.
The other method flips sections (manually as wired) and aligns their seams, which produces a fuller result without twist.
I added the white group below to show the difference using ‘Loft 1’ or ‘Loft 2’ (blue group)
Twisted lines_2023Jul21a.gh (22.2 KB) - full size image
