REG1 - 2 polyh with union = prism and 1 reflex edge
0.0 30.0 20.0 40.0 0.05 40.0 0.25 0.5 25 200 0 0.8
14 12 0 2 0 2 0

0.0 0.0 3.0
4.0 0.0 3.0
4.0 6.0 3.0
0.0 6.0 3.0
0.0 0.0 0.0
4.0 0.0 0.0
4.0 6.0 0.0
0.0 6.0 0.0
0.0 4.0 3.0
2.0 2.0 3.0
4.0 4.0 3.0
0.0 4.0 0.0
2.0 2.0 0.0
4.0 4.0 0.0

1 5 10 14 19 23 27 31 36 40 45 49 53
1 2  3  4  5  6  7  8  9 10 11 12

1 2 6 5
1 2 11 10 9
2 6 14 11
5 6 14 13 12
1 5 12 9
9 10 13 12
10 11 14 13
9 10 11 3 4
11 14 7 3
12 13 14 7 8
9 12 8 4
4 3 7 8

1 8 15

-1 2 3 -4 -5 6 7
-6 -7 8 9 -10 -11 12

face
1 4 1.0 0.0 0.0
10  24  135.0
15  -5   90.0
2.0 0.0 3.0
16  -3  -90.0
2.0 0.0 0.0
13 -17  -90.0

vertex
1 2.0 0.0 3.0
Vertex
3 2.0 0.0 0.0
Edge
54 55
Face
1 4 1.0 0.0 0.0
10  24  135.0
15  -5   90.0
16  57  -90.0
13 -17  -90.0