Your interpretation re generating designs is largely correct.  The 3 different hull line sets in the current design (leeward – symmetric so 1 set of lines; windward – asymmetric so 2 sets of lines) are generated from 3 parameter sets. In the case of the leeward side of windward hull, the coach roof, cockpit seating and doorway are generated simply through a set of parameters. Bulkhead placement isn’t specified within the program, but given that section detail can be generated on a 1mm scale, its quick to select the relevant bulkhead and turn it into a surface within the designers usual CAD package. A different cockpit–cabin layout may require some additional programming.

Your preference for the Harry Proa style cabin is understandable.  The design (styling) approach I have followed seeks to maximise cabin volume whilst minimising windage (and surface area) when the apparent wind is forward of the beam.

I don’t doubt that this concept could be scaled up.  My immediate goals are much more modest, but time will tell.

David