diff --git a/pylot/core/active/seismicArrayPreparation.py b/pylot/core/active/seismicArrayPreparation.py
index c56ee29d..a7a181a6 100644
--- a/pylot/core/active/seismicArrayPreparation.py
+++ b/pylot/core/active/seismicArrayPreparation.py
@@ -619,9 +619,54 @@ class SeisArray(object):
         sys.stdout.write("%d%% done   \r" % (progress) )
         sys.stdout.flush()
 
+    def surface2VTK(self, surface, filename = 'surface.vtk'):
+        '''
+        Generates a vtk file from all points of a surface as generated by interpolateTopography.
+        '''
+        outfile = open(filename, 'w')
+
+        nPoints = len(surface)
+
+        # write header
+        print("Writing header for VTK file...")
+        outfile.writelines('# vtk DataFile Version 3.1\n')
+        outfile.writelines('Surface Points\n')
+        outfile.writelines('ASCII\n')
+        outfile.writelines('DATASET POLYDATA\n')
+        outfile.writelines('POINTS %15d float\n' %(nPoints))
+
+        # write coordinates
+        print("Writing coordinates to VTK file...")
+        for point in surface:
+            x = point[0]
+            y = point[1]
+            z = point[2]
+
+            outfile.writelines('%10f %10f %10f \n' %(x, y, z))
+
+        outfile.writelines('VERTICES %15d %15d\n' %(nPoints, 2 * nPoints))
+
+        # write indices
+        print("Writing indices to VTK file...")
+        for index in range(nPoints):
+            outfile.writelines('%10d %10d\n' %(1, index))
+
+        # outfile.writelines('POINT_DATA %15d\n' %(nPoints))
+        # outfile.writelines('SCALARS traceIDs int %d\n' %(1))
+        # outfile.writelines('LOOKUP_TABLE default\n')
+
+        # # write traceIDs
+        # print("Writing traceIDs to VTK file...")
+        # for traceID in traceIDs:
+        #     outfile.writelines('%10d\n' %traceID)
+
+        outfile.close()
+        print("Wrote %d points to file: %s" %(nPoints, filename))
+        return
+
     def receivers2VTK(self, filename = 'receivers.vtk'):
         '''
-        Generates vtk files from all receivers of the SeisArray object.
+        Generates a vtk file from all receivers of the SeisArray object.
         '''
         outfile = open(filename, 'w')
         traceIDs = []
@@ -670,7 +715,7 @@ class SeisArray(object):
 
     def sources2VTK(self, filename = 'sources.vtk'):
         '''
-        Generates vtk-files for all source locations in the SeisArray object.
+        Generates a vtk-file for all source locations in the SeisArray object.
         '''
         outfile = open(filename, 'w')
         shotnumbers = []