I am stuck. I am trying to model Shoe Lasts for a Footwear project at university but running into trouble. Could someone advise the best way to go about constructing one. I have a created a base surface but cannot create the upper surface of the foot. I try to create a Curve Network but am getting the error, “unable to build this curve network”. Could someone advise what I am doing wrong. I am new to Rhino. Please see attached image
surface modelling, modelling, footwear, shoe last, curve network.