Hi pafurijaz, the methods in NX and Catia is using a "fill surface" which is a method that constructs a single surface that is warped to match different boundary constraints. MoI does not currently have that type of surface fitting tool in it, it is a pretty tricky area of surfacing. In fact in the videos the person doing the modeling says the NX result was not quite right.

Note that both of these packages, NX and Catia are extremely expensive like $10,000+ per seat.

Doing it with sub-d is probably a good approach to focus on, or there is also a surface fitting plug-in for Rhino called XNurbs which could be good for trying to build one single smooth surface with the boundary constraints.

- Michael