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Select crossing curves and get one live region for every enclosed face, all at once.

Menu: Combine > Auto Region | Node: Auto Region | In depth: Regions & booleans

Select segments, arcs, circles, lines and rays that cross each other, and Locus fills every enclosed face at once. Where Region asks you for one tidy closed loop and gives you one region, Auto Region takes the tangle as it is, works out where the curves cross, and hands back a region for each cell they bound.

Adjacent faces share their points and edges, so the result is a proper subdivision rather than a stack of separate shapes that happen to touch. Move one of the original curves and every face that touches it updates together, with no gap opening along the shared edge.

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• In the node graph: Auto Region - the same faces, built as a node.
• Region - one region from one closed loop, when that is all you need.
• Regions & booleans - what to do with the regions once you have them.