(Ceiling01) number of surfaces: 5
1) to_main
( 1 2 3 4 )
2) WestSlope
( 1 5 6 2 )
3) NorthGable
( 2 6 3 )
4) EastSlope
( 3 6 5 4 )
5) SouthGable
( 4 5 1 )
