The world is changing and we are turning more and more to new technologies. 3D printing is a new manufacturing process that enables the user make three dimensional solid objects of any kind from digital file. The 3D object is printed by using additive process – the printer lays down successive layers or material until the object is made. The research carried out in the project azzurro aims to use 3D to give a representation to the buildings. This representation allows engineers and architects to identify hidden faces and points of a building.