Custom-designed 3D façades could previously only be fulfilled with elaborate special solutions. For the first time geometrically freeform 3D façades can now be created as system solutions that are easy to design and affordable when fabricated as series products using the principle of mass customization. A central component is the continuous digitalization of the process chain in all phases of design, detailing and fabrication. The system provides enormous design freedom through the configuration of areas with opaque or transparent units for daylight control or solar energy generation. A specially developed software chain supports the process.