Then a campaign of digital fabrication tests have been started to optimize, simultaneously, the shape of the facade and the printing settings. The printing tests have been held trough a 3MT printer with a pellet extruder (3mm nozzle size) able to reach up to 1 m height and 1 mt diameter. The facade have been divided in panels in order to facilitate the printing and the assembly. Panels are 72 cm wide with a height that can vary according to the lamellas shape, these dimensions perfectly fit into the printer plate enabling to print them horizontally. This way of printing makes the pieces stronger and aesthetically pleasant showing curves in layers direction. Every lamella has a opening in its terminal portion to allow mullions fitting in it, the façade is simply assembled slipping panels into mullions, one on top of the other. Many materials have been tested with the printer, starting from HT (high temperature) PLA with addition of differrent fibers and Polypropylene. For every materials a set of tools and settings have been customizes for printing. In the next chapter are illustrated tests conducted in a climatic chamber to study materials properties and their behaviour in hot climate with high UV rays.