Rhino 3D (Rhinoceros) is the industry standard for precise 3D computer-aided design (CAD). It uses a mathematical model called NURBS (Non-Uniform Rational B-Splines). Unlike mesh-based software, Rhino calculates curves and surfaces with absolute geometric accuracy. This makes it indispensable for architecture, industrial design, jewelry fabrication, and marine engineering.

Sketch -> 2D CAD (.dwg) -> Import to Rhino -> SelLayer (select cad) -> Move to Z=0 -> Trace with Curve -> Extrude -> BooleanUnion (add walls) -> BooleanDifference (cut windows) -> Export to Lumion/Enscape.