Special curves and special points should be included in surface triangulation mesh.
Special curves should also include trimming loops. However, trimming itself is covered by #485.
Triangulation
Special curves and points are defined in 2-dimensional UV space of the surface. Thus triangulation presented below should be relatively easy to achieve:

Special curves and special points should be included in surface triangulation mesh.
Special curves should also include trimming loops. However, trimming itself is covered by #485.
Triangulation
Special curves and points are defined in 2-dimensional UV space of the surface. Thus triangulation presented below should be relatively easy to achieve: