Hi john, thanks for posting that. Yes I would probably go with subdivision surface modeling for doing that.

For doing it in NURBS it would work better to change how you're specifying the structure, you'd want to set up dome shapes and have the final edges be created by intersections between the domes rather than starting out with those edges and trying to surface those. If you had all 4-sided areas you could do it by surfacing but it will be difficult with 3 sided areas included. Subdivision surfaces are good at dealing with adapting to topology changes like that.

- Michael