Index: mitkImageMapper2D.cpp
===================================================================
--- mitkImageMapper2D.cpp	(revision 21081)
+++ mitkImageMapper2D.cpp	(working copy)
@@ -1156,7 +1156,11 @@
   node->AddProperty( "bounding box", mitk::BoolProperty::New( false ) );
 
   // some more properties specific for a binary...
-  if(image->GetScalarValueMax() == image->GetScalarValue2ndMin()&& image->GetScalarValueMin() == image->GetScalarValue2ndMax()) 
+  mitk::BoolProperty::Pointer dontBinarizeProp = static_cast <mitk::BoolProperty *> (node->GetProperty("dontBinarize"));
+  bool dontBinarize = dontBinarizeProp.IsNotNull() && (dontBinarizeProp->GetValue()==true);
+  if( ( image->GetScalarValueMax() == image->GetScalarValue2ndMin()&& 
+	    image->GetScalarValueMin() == image->GetScalarValue2ndMax() ) && 
+	    !dontBinarize )
   {
     node->AddProperty( "opacity", mitk::FloatProperty::New(0.3f), renderer, overwrite );
     node->AddProperty( "color", ColorProperty::New(1.0,0.0,0.0), renderer, overwrite );