B-spline surfaces
interpolation, fitting & energy minimization fairing; fair surface extension; trim surfaces; surface deformations; modeling; repair ripple/bumpy surfaces; making surfaces normal and curvature continuity.

Starting from the left input point cloud, a fair b-spline surface can be fitted with energy minimization.

 
Surface extend with improved boundary continuity

Free-style subdivision surface modeling
our FreeShape technology enables modeling with 4-sided full patches for arbitrary topolog from elementary solids.

The Free Shape Design technique can generate smooth 4-sided full patches (right) from simple elementary solids (left green wireframes) of arbitrary topology.