100                   # total photon
17182818            # RNG seed, negative to generate
2 8 0.0        # source position (mm)
0. 0. 1.                # initial directional vector
0.e+00 5.e-09 5e-10  # time-gates(s): start, end, step
onecube              # volume ('uchar' format)
3
3	1            # detector number and radius (mm)
2.0	6.0	0.0  # detector 1 position (mm)
2.0	4.0	0.0  # ...
2.0	2.0	0.0
