diff --git a/data/input_data/jan_models/model5_surface_points.csv b/data/input_data/jan_models/model5_surface_points.csv
index 01b8d1e..794d5b6 100644
--- a/data/input_data/jan_models/model5_surface_points.csv
+++ b/data/input_data/jan_models/model5_surface_points.csv
@@ -1,20 +1,36 @@
 X,Y,Z,formation
-0,200,600,rock1
-0,800,600,rock1
-200,200,600,rock1
-200,800,600,rock1
-800,200,200,rock1
-800,800,200,rock1
-1000,200,200,rock1
-1000,800,200,rock1
-0,200,800,rock2
-0,800,800,rock2
-200,200,800,rock2
-200,800,800,rock2
-800,200,400,rock2
-800,800,400,rock2
-1000,200,400,rock2
-1000,800,400,rock2
+0,200,200,rock1
+0,800,200,rock1
+200,200,200,rock1
+200,800,200,rock1
+800,200,100,rock1
+800,800,100,rock1
+1000,200,100,rock1
+1000,800,100,rock1
+0,200,400,rock2
+0,800,400,rock2
+200,200,400,rock2
+200,800,400,rock2
+800,200,200,rock2
+800,800,200,rock2
+1000,200,200,rock2
+1000,800,200,rock2
+0,200,600,rock3
+0,800,600,rock3
+200,200,600,rock3
+200,800,600,rock3
+800,200,400,rock3
+800,800,400,rock3
+1000,200,400,rock3
+1000,800,400,rock3
+0,200,800,rock4
+0,800,800,rock4
+200,200,800,rock4
+200,800,800,rock4
+800,200,600,rock4
+800,800,600,rock4
+1000,200,600,rock4
+1000,800,600,rock4
 500,500,500,fault
 450,500,600,fault
 500,200,500,fault
@@ -22,3 +38,4 @@ X,Y,Z,formation
 500,800,500,fault
 450,800,600,fault
 
+