A method for manufacturing a skin from a plastic material. The method includes the following steps: producing a first part of the skin having a property according to a first level, producing a second part of the skin extending the first part and having the property at the first level on a first edge in contact with the first part and a second level on a second edge in contact with a third part of the skin extending the second part, and producing the third part of the skin having the property at the second level, the production steps being carried out using additive technology, such as 3D printing. Also provided is a skin obtained by such a method.