Not a complete answer, but maybe you'll understand the problem better when you better understand "bezier" and "spline" from these two excellent videos: https://youtu.be/aVwxzDHniEw?si=tdAZYKaF9N47B7DG https://youtu.be/jvPPXbo87ds?si=0vEKdNsZ7vFyHVMP