MAP_COMBINE /BLANKING

        [CLEAN\]MAP_COMBINE OutCube CODE In1 In2 [/FACTOR A1 A2]
      [/THRESHOLD T1 T2] /BLANKING Bval

    Specify the Blanking value to be used in the OutCube. If not specified,  the
    Blanking from In1 is used instead, and that of In2 if In1 has no Blanking.