diff --git a/examples/osgkeyboardmouse/osgkeyboardmouse.cpp b/examples/osgkeyboardmouse/osgkeyboardmouse.cpp
index 98970ad74..926b062ed 100644
--- a/examples/osgkeyboardmouse/osgkeyboardmouse.cpp
+++ b/examples/osgkeyboardmouse/osgkeyboardmouse.cpp
@@ -124,10 +124,14 @@ public:
         _mx(0.0),_my(0.0),
         _usePolytopeIntersector(false),
         _useWindowCoordinates(false),
-        _precisionHint(osgUtil::Intersector::USE_DOUBLE_CALCULATIONS) {}
+        _precisionHint(osgUtil::Intersector::USE_DOUBLE_CALCULATIONS),
+        _dimensionMask(osgUtil::PolytopeIntersector::AllDims) {}
 
     ~PickHandler() {}
 
+    void setDimensionMask(unsigned int dimensionMask) { _dimensionMask = dimensionMask; }
+
+
     bool handle(const osgGA::GUIEventAdapter& ea, osgGA::GUIActionAdapter& aa)
     {
         osgViewer::Viewer* viewer = dynamic_cast<osgViewer::Viewer*>(&aa);
@@ -224,7 +228,9 @@ public:
 
                 if (_usePolytopeIntersector)
                 {
-                    intersector = new osgUtil::PolytopeIntersector( osgUtil::Intersector::WINDOW, x-dx*0.5, y-dy*0.5, x+dx*0.5, y+dy*0.5);
+                    osg::ref_ptr<osgUtil::PolytopeIntersector> pi = new osgUtil::PolytopeIntersector( osgUtil::Intersector::WINDOW, x-dx*0.5, y-dy*0.5, x+dx*0.5, y+dy*0.5);
+                    pi->setDimensionMask(_dimensionMask);
+                    intersector = pi.get();
                 }
                 else
                 {
@@ -284,6 +290,7 @@ public:
             }
 
             picker->setPrecisionHint(_precisionHint);
+            picker->setDimensionMask(_dimensionMask);
 
             osgUtil::IntersectionVisitor iv(picker);
 
@@ -405,6 +412,7 @@ protected:
     bool _usePolytopeIntersector;
     bool _useWindowCoordinates;
     osgUtil::Intersector::PrecisionHint _precisionHint;
+    unsigned int _dimensionMask;
 
 };
 
@@ -451,6 +459,9 @@ int main( int argc, char **argv )
     while (arguments.read("--double")) { pickhandler->setPrecisionHint(osgUtil::Intersector::USE_DOUBLE_CALCULATIONS); }
     while (arguments.read("--float")) { pickhandler->setPrecisionHint(osgUtil::Intersector::USE_FLOAT_CALCULATIONS); }
 
+    unsigned int mask = osgUtil::PolytopeIntersector::AllDims;
+    while (arguments.read("--dim-mask", mask) || arguments.read("--dm", mask)) { pickhandler->setDimensionMask(mask); }
+
     // load model
     osg::ref_ptr<osg::Node> loadedModel = osgDB::readRefNodeFiles(arguments);