Granite. Point source. Mean field. Goff-J. 
P N s O g
100 0
3
-100 1500 0 0 0 1 0
-100 1500 0 0 0 1 0
0 5000 2000 0.1 0.2 3.0  1. 7.07 
-100
-100 -2 50

1200 -1200
1000 1 950 25
512 50 150 0.001 0 0.5 3