How to loft each lines

20231210 (8.8 KB)
Hello, I am trying to make the “lofted” surfaces in order from the lines. but i have no idea to shift the list and loft each lines as i attached.
does someone have any idea to solve that?
Best, Keisuke

you could do that

You need to shit a list not a datatree, Wrap to false.
Merge tree in order to have 2 items in each branch.
20231210 (12.3 KB) (17.8 KB)

P.S. Then again, you could use the Brep | Plane intersection curves as input to SrfSplit, though note that the sequence of surface fragments is not guaranteed. (20.4 KB)