The rate of curvature matches perfectly across the seam. Use MatchSrf and BlendSrf to achieve G2 continuity.

: Sweeps cross-section curves along one or two "rail" curves. This is the backbone of organic and industrial product modeling. Boolean Operations vs. Trimming

Start with simple curves. Move to complex surfaces. End with parametric mastery.

Drives a cross-section curve along one or two guide paths. This is excellent for moldings, pipes, and complex architectural frames.

You have mastered lines and lofts. Now you face the "Rhino Middle Wall": Why won't my surface fillet? Why can't I Boolean union these two things?

Surfaces meet smoothly, but the rate of curvature changes abruptly.

Advanced users model with "downstream processes" in mind (rendering, fabrication, or 3D printing).

Manage complex data structures for generative patterns. 🧬 SubD Modeling (Rhino 7 and 8)

1. Fundamentals for Beginners: The Core Interface and Navigation