(Main) number of surfaces: 12
1) Mainfloor2
( 1 2 3 4 1 33 9 10 11 12 9 33 )
2) Mainfloor1
( 4 3 5 6 4 13 14 15 17 18 19 20 17 15 16 13 )
3) Mainfloor4
( 6 5 7 8 6 34 21 22 23 24 21 34 )
4) Mainfloor3
( 8 7 2 1 8 25 26 27 29 30 31 32 29 27 28 25 )
5) to_bsm
( 1 4 6 8 )
6) to_attic
( 7 5 3 2 )
7) Right0001
( 9 12 11 10 )
8) Door-01
( 13 16 15 14 )
9) Front0001
( 17 20 19 18 )
10) Left0001
( 21 24 23 22 )
11) Door-02
( 25 28 27 26 )
12) Back0001
( 29 32 31 30 )
