* 2D_to_3D file
*   This data file is necessary when GEOMETRY(12)=4
*  NO_LAYERS *  NO_BASE_MAT_IDS * NO_LAYERS_DATA * NO_Z_DATA * COORD_ID * NO_SURFACES * EX_DIREC *
     21              6                 3              2           0           0               0
*  LAYER NO * Z_COORDINATE * DIVISION RATIO *  (NO_Z_DATA+1 data)
     1            0.0             1.0
     2            0.005           1.122
    22            0.505
*  When NO_LAYER_DATA =0
*  Z_COODINATES  (NO_LAYERS+1 data)
*    0.0
*    1.0
*  LAYER NO  * Z_COORDINATE * DIVISION_RATIO * 
*  BASE_MAT_IDS *  (NO_BASE_MAT_IDS data)
                       1    2    3    4  5  6
*  LAYER_FROM * TO *  MAT_IDS * (NO_LAYERES_DATA data)
           1     1     1    2    3   4   5  6
           2     2     2    2    3   4   5  6
           3    21     2    2    0    0  0  0
*  BASE_MAT_ID * MAT_ID * LAYER_POSITION * (NO_SURFACE data )
*      3            51          17