diff --git a/models/view_cylinder_T.py b/models/view_cylinder_T.py
index d63d11911d3a1e12a5d5bba96e9bb285032ea626..a230385ff2c7da2c1df139ba91cebd09d1245f79 100644
--- a/models/view_cylinder_T.py
+++ b/models/view_cylinder_T.py
@@ -31,7 +31,7 @@ if __name__=="__main__":
     view.addActors(muscleF.actor) 
     view.addActors(forces.actor) 
 
-    surface.actor.GetProperty().SetOpacity(0.1)
+    surface.actor.GetProperty().SetOpacity(0.3)
     
     muscle.mapper.SetResolveCoincidentTopologyToPolygonOffset()
     muscle.actor.GetProperty().SetColor( colors.GetColor3d('red') )
diff --git a/models/view_cylinder_TN.py b/models/view_cylinder_TN.py
index 29691811e299284d4e49a76ba86ad179a102e473..15a8d7ab534c1a3a0969e32be9aa764c1c5365bc 100644
--- a/models/view_cylinder_TN.py
+++ b/models/view_cylinder_TN.py
@@ -55,7 +55,7 @@ if __name__=="__main__":
     view.addActors(muscleF.actor) 
     view.addActors(forces.actor) 
 
-    surface.actor.GetProperty().SetOpacity(0.1)
+    surface.actor.GetProperty().SetOpacity(0.3)
     
     muscle.mapper.SetResolveCoincidentTopologyToPolygonOffset()
     muscle.actor.GetProperty().SetColor( colors.GetColor3d('red') )