A star that has become the symbol of the city and that today, on the occasion of the festival, the Polytechnic of Turin - through the CIM 4.0 - Competence Industry Manufacturing 4.0 of which the university is the founder, together with the University of Turin and 23 partners corporate - proposes in a highly technological guise. The figurine was made of an aluminum alloy through the process of additive manufacturing, or additive manufacturing, i.e. 3D printing for industrial applications, a field of expertise of CIM 4.0. The main advantage of additive manufacturing is in fact that of being able to create objects of great geometric complexity within a few hours without the aid of other equipment or tools.