Fluid-fluid halfspaces
N C J  
150 0
2
0 1500 0 0 0 1 0
0 1800 0 0 0 1.8 0
-25
-500 0 61 60
1000 1E8
1024 1 900 
0 0.5 15 0.1
-500 0 15 100
30 60 3