A system for cutting masks for protecting a portion of a vehicle, which includes: - a machine for cutting masks in a sheet material, the machine including a movable tool for cutting the sheet material; - a data processing unit connected to the cutting machine and arranged to control the relative displacement of the cutting tool and the sheet material; - a database of mask contours, which is associated to the data processing unit; - a display unit and a data input unit coupled to the data processing unit; the system being characterized in that it further includes: - a second database containing, for several vehicles, several representations of each vehicle from several distinct angles of view, this second database being associated to the data processing unit; - a unit for controlling the display unit which is coupled - in particular integrated - to the data processing unit and which is arranged, in particular programmed, to: • extract from the second database the representations (REP1 to REP5) from several angles of view of a vehicle, as a function of at least one vehicle selection datum input into the data processing unit via the data input unit; • modify the representations from several distinct angles of the selected vehicle, as a function of at least one mask selection datum input into the data processing unit via the data input unit; and • control the display, substantially simultaneous display, on the display unit, of the modified representations of the selected vehicle. - a machine for cutting masks in a sheet material, the machine including a movable tool for cutting the sheet material; - a data processing unit connected to the cutting machine and arranged to control the relative displacement of the cutting tool and the sheet material; - a database of mask contours, which is associated to the data processing unit; - a display unit and a data input unit coupled to the data processing unit; - a second database containing, for several vehicles, several representations of each vehicle from several distinct angles of view, this second database being associated to the data processing unit; - a unit for controlling the display unit which is coupled - in particular integrated - to the data processing unit and which is arranged, in particular programmed, to: • extract from the second database the representations (REP1 to REP5) from several angles of view of a vehicle, as a function of at least one vehicle selection datum input into the data processing unit via the data input unit; • modify the representations from several distinct angles of the selected vehicle, as a function of at least one mask selection datum input into the data processing unit via the data input unit; and • control the display, substantially simultaneous display, on the display unit, of the modified representations of the selected vehicle. • extract from the second database the representations (REP1 to REP5) from several angles of view of a vehicle, as a function of at least one vehicle selection datum input into the data processing unit via the data input unit; • modify the representations from several distinct angles of the selected vehicle, as a function of at least one mask selection datum input into the data processing unit via the data input unit; and • control the display, substantially simultaneous display, on the display unit, of the modified representations of the selected vehicle.