Method for designing and 3d printing a shoe with a plurality of outer surface areas

A method for three-dimensional (3D) printing a shoe part, the method comprising additively printing the shoe part,

• wherein the shoe part comprises an outer surface, an inner surface, and an intermediate section which connects the outer surface and the inner surface by an infill structure,
• wherein the outer surface comprises at least a first portion comprising an open outer structure and a second portion comprising a closed outer structure, and
• wherein the infill structure at the first portion and second portion is substantially the same and comprises at least one infill connecting line connecting a point adjacent to the outer surface with a corresponding point on the inner surface.

A three-dimensional (3D) printing apparatus provided with instructions causing the apparatus to additively print a shoe part,

• wherein the shoe part comprises an outer surface, an inner surface, and an intermediate section which connects the outer surface and the inner surface by an infill structure,
• wherein the outer surface comprises at least a first portion comprising an open outer structure and a second portion comprising a closed outer structure, and
• wherein the infill structure at the first portion and second portion is substantially the same and comprises at least one infill connecting line connecting a point adjacent to the outer surface with a corresponding point on the inner surface.