diff --git a/applications/utilities/preProcessing/viewFactorsGen/viewFactorsGen.C b/applications/utilities/preProcessing/viewFactorsGen/viewFactorsGen.C
index 3b9b3cd8f5..0bbda1855a 100644
--- a/applications/utilities/preProcessing/viewFactorsGen/viewFactorsGen.C
+++ b/applications/utilities/preProcessing/viewFactorsGen/viewFactorsGen.C
@@ -189,11 +189,6 @@ void writeRays
         }
     }
     str.flush();
-
-    Pout<< "cmd: objToVTK " << fName.c_str() << endl;
-
-    stringList cmd({"objToVTK", fName, fName.lessExt().ext("vtk")});
-    Foam::system(cmd);
 }
 
 
diff --git a/tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/Allclean b/tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/Allclean
index d4a9953c51..9ec4cc756c 100755
--- a/tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/Allclean
+++ b/tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/Allclean
@@ -3,6 +3,7 @@ cd ${0%/*} || exit 1                        # Run from this directory
 . $WM_PROJECT_DIR/bin/tools/CleanFunctions  # Tutorial clean functions
 
 cleanCase0
+\rm allVisibleFaces.obj 2>/dev/null
 
 rm -rf constant/cellToRegion
 rm -rf constant/*/polyMesh  # region meshes
diff --git a/tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/constant/air/viewFactorsDict b/tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/constant/air/viewFactorsDict
index 92636ec688..d40b58ddb0 100644
--- a/tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/constant/air/viewFactorsDict
+++ b/tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/constant/air/viewFactorsDict
@@ -17,6 +17,8 @@ FoamFile
 writeViewFactorMatrix     true;
 writeFacesAgglomeration   true;
 writePatchViewFactors     false;
+// dumpRays    true;
 
 maxDynListLength     200000;
+
 // ************************************************************************* //