Select divided surface by intersection

[Mostafa_El_Ayoubi]

check this post:

Random list of lines (Voronoi import pattern): Can we sync them?

Hi Sol Amour, here’s an idea : you can extrude those segments, join all surfaces you get as a polysurface and then use it to split the base face. You will get your “cells” as surfaces and can then go back to their outline with surface.perimetercurves . This is more geometric than logic but it gets you there fast … [voronoi]

the onlly difference here is instead of using ZAxis to extrude you need to use some other vector… I don’t know exactly how your grid is created but maybe the normal to the surface at the midle point of each gridline could work…