This script creates splines from intersecting polygons along the lower portion of these polygons (in the local Z axis). The polygons must be selected (either the required ones or not, in which case all polygons will be processed). It supports multiple objects and edits poly modifiers (prioritizing intensities, then upper modifiers that haven't been disabled). You can flatten each individual spline along the Z axis, or all at once at the same level. Single mode creates individual splines for selected objects, while Combi mode creates a single spline, allowing the splines to interact with each other. Thresholds and a minimum angle distinguish this script from some similar ones, meaning it can work even at minimal angles.
To ensure proper spline operation, it's recommended to select only the polygons for which splines need to be created. It's important to avoid creating duplicate or multiple spline paths. It's also not recommended to use splines for complex, large, or irregular geometry. If the script freezes, you can terminate it early by pressing ESC.
Installation via mzp (run script) - category - Maker