A computer-implemented method of calculating a printing time duration and/or an amount of material consumption for one or more materials required for printing a tray arrangement comprising one or more 3D objects using a 3D printing system, the method comprising: receiving a 3D model of a tray arrangement including one or more 3D objects to be printed using a 3D printing system; generating, based on the 3D model, a 3D digital dataset comprising a plurality of data elements arranged in a set of horizontal slices, wherein a slicing resolution of the 3D digital dataset is lower than a printing resolution of the 3D printing system; and at least one of: (i) calculating an amount of material consumption of one or more printing materials required for printing the tray arrangement, based on the 3D digital dataset; (ii) calculating a printing time required for printing the tray arrangement based on the 3D digital dataset and at least one set of printing parameters; and displaying or reporting at least one of: the calculated amount of material consumption of one or more materials and the calculated printing time required for printing the tray arrangement, wherein the displaying or reporting is performed during the printing of the tray arrangement at the printing resolution and wherein calculating the amount of material consumption of one or more printing materials and/or calculating the printing time is further based on an amount of one or more materials consumed and/or a printing time spent from the start of the printing up to the displaying or reporting time. receiving a 3D model of a tray arrangement including one or more 3D objects to be printed using a 3D printing system; generating, based on the 3D model, a 3D digital dataset comprising a plurality of data elements arranged in a set of horizontal slices, wherein a slicing resolution of the 3D digital dataset is lower than a printing resolution of the 3D printing system; and at least one of: (i) calculating an amount of material consumption of one or more printing materials required for printing the tray arrangement, based on the 3D digital dataset; (ii) calculating a printing time required for printing the tray arrangement based on the 3D digital dataset and at least one set of printing parameters; and (i) calculating an amount of material consumption of one or more printing materials required for printing the tray arrangement, based on the 3D digital dataset; (ii) calculating a printing time required for printing the tray arrangement based on the 3D digital dataset and at least one set of printing parameters; and displaying or reporting at least one of: the calculated amount of material consumption of one or more materials and the calculated printing time required for printing the tray arrangement, wherein the displaying or reporting is performed during the printing of the tray arrangement at the printing resolution and wherein calculating the amount of material consumption of one or more printing materials and/or calculating the printing time is further based on an amount of one or more materials consumed and/or a printing time spent from the start of the printing up to the displaying or reporting time. <EOS>