First attempt to model the same chair cushion
The next step is to introduce a groove on the seams (illustrated by the red Pipe)
The groove/fold/crease created by a Pipe with a BooleanDiff produces edges way too sharp, and I plan to Sweep1 or Sweep2 a smoother profile:
Question1: how do I position a custom Sweep profile (cross section curves) to run along the rail/edge and keep it somewhat tangent to both connecting surfaces?
Question 2: Is there another simpler way to make a smooth groove in a solid?