diff --git a/rtgui/guiutils.cc b/rtgui/guiutils.cc
index 1e4f4eac8..23c006d3b 100644
--- a/rtgui/guiutils.cc
+++ b/rtgui/guiutils.cc
@@ -917,6 +917,11 @@ bool MyExpander::on_enabled_change(GdkEventButton* event)
     return false;
 }
 
+void MyExpander::setSensitive(bool makeSensitive)
+{
+    set_sensitive(makeSensitive);
+}
+
 /*
  *
  * Derived class of some widgets to properly handle the scroll wheel ;
diff --git a/rtgui/guiutils.h b/rtgui/guiutils.h
index fb627a78a..fbc2ef999 100644
--- a/rtgui/guiutils.h
+++ b/rtgui/guiutils.h
@@ -268,6 +268,9 @@ public:
     /// Set the collapsed/expanded state of the expander
     void set_expanded( bool expanded );
 
+    // Set whether the expander should be grayed-out.
+    void setSensitive(bool makeSensitive);
+
     /// Get the collapsed/expanded state of the expander
     bool get_expanded();
 
diff --git a/rtgui/toolpanel.cc b/rtgui/toolpanel.cc
index 0d441e01f..515fb60ef 100644
--- a/rtgui/toolpanel.cc
+++ b/rtgui/toolpanel.cc
@@ -146,5 +146,14 @@ void FoldableToolPanel::setEnabledTooltipText(Glib::ustring tooltipText)
     }
 }
 
-
+void FoldableToolPanel::setGrayedOut(bool doGrayOut)
+{
+    if (doGrayOut) {
+        exp->setEnabled(false);
+        exp->set_expanded(false);
+        exp->setSensitive(false);
+    } else {
+        exp->setSensitive(true);
+    }
+}
 
diff --git a/rtgui/toolpanel.h b/rtgui/toolpanel.h
index d3d7439a9..fd7d27fbe 100644
--- a/rtgui/toolpanel.h
+++ b/rtgui/toolpanel.h
@@ -205,6 +205,7 @@ public:
     void setEnabledTooltipText(Glib::ustring tooltipText);
     bool get_inconsistent();  // related to the enabled/disabled state
     void set_inconsistent(bool isInconsistent);  // related to the enabled/disabled state
+    void setGrayedOut(bool doGrayOut); // Set whether the tool should be disabled, collapsed and grayed-out.
 
     void setLevel (int level);
 
diff --git a/rtgui/toolpanelcoord.cc b/rtgui/toolpanelcoord.cc
index 5a69119c2..5d35a9ad5 100644
--- a/rtgui/toolpanelcoord.cc
+++ b/rtgui/toolpanelcoord.cc
@@ -275,6 +275,7 @@ void ToolPanelCoordinator::imageTypeChanged (bool isRaw, bool isBayer, bool isXt
                 self->sensorbayer->FoldableToolPanel::show();
                 self->preprocess->FoldableToolPanel::show();
                 self->flatfield->FoldableToolPanel::show();
+                self->retinex->FoldableToolPanel::setGrayedOut(false);
 
                 return FALSE;
             };
@@ -289,6 +290,7 @@ void ToolPanelCoordinator::imageTypeChanged (bool isRaw, bool isBayer, bool isXt
                 self->sensorbayer->FoldableToolPanel::hide();
                 self->preprocess->FoldableToolPanel::show();
                 self->flatfield->FoldableToolPanel::show();
+                self->retinex->FoldableToolPanel::setGrayedOut(false);
 
                 return FALSE;
             };
@@ -303,6 +305,7 @@ void ToolPanelCoordinator::imageTypeChanged (bool isRaw, bool isBayer, bool isXt
                 self->sensorxtrans->FoldableToolPanel::hide();
                 self->preprocess->FoldableToolPanel::hide();
                 self->flatfield->FoldableToolPanel::show();
+                self->retinex->FoldableToolPanel::setGrayedOut(false);
 
                 return FALSE;
             };
@@ -316,6 +319,7 @@ void ToolPanelCoordinator::imageTypeChanged (bool isRaw, bool isBayer, bool isXt
                 self->sensorxtrans->FoldableToolPanel::hide();
                 self->preprocess->FoldableToolPanel::hide();
                 self->flatfield->FoldableToolPanel::hide();
+                self->retinex->FoldableToolPanel::setGrayedOut(false);
 
                 return FALSE;
             };
@@ -326,6 +330,7 @@ void ToolPanelCoordinator::imageTypeChanged (bool isRaw, bool isBayer, bool isXt
             ToolPanelCoordinator* const self = static_cast<ToolPanelCoordinator*>(data);
 
             self->rawPanelSW->set_sensitive (false);
+            self->retinex->FoldableToolPanel::setGrayedOut(true);
 
             return FALSE;
         };