The idea of casting differentiated cells has been pushed further to develop a digital mould in order to ease the process of casting and remove the fabrication of hundreds of individual moulds. this digital mould should receive its data from the model and adjust itself to be able to cast a piece and readjust to continue the process. since the mould was project-specific, it supposed to be custom-designed, low-cost and should be disposed after project. after several trial and error loops, the final mould has been developed with acrylic/MDF laser-cut parts being driven by servo motors and a micro-controller board (Arduino). So the mould was in serial communication with the PC (model), reading the date from the model to adjust its geometry to be cast for each piece. The design has been developed parallel to the development of the mould to incorporate its geometrical needs and necessities. More than 420 pieces have been cast in order to realize the “Procrystalline wall”.