Hello everybody, I don't understand the meaning of this sentence: In order to create optimum efficiency, sails are fabricated with their "shape" built in". from the book Sol Power, by S. and St. Behling. Here is the entire paragraph actually: Form generation, not design, is the name of the game. Computer programs have been developed to simulate the stress of the wind on every cm2 of a sail. In order to create optimum efficiency, sails are fabricated with their "shape" built in. Scientists and engineers are constantly experimenting with new materials, construction methods, and shapes. The race to build the highest-performance boat and sails is as hard as the actual regatta itself. Does it mean that their shape is innate to them? That they couldn't look like something else, but just like that? Thank you!