diff --git a/rtengine/procevents.h b/rtengine/procevents.h
index e3243938f..160441c4d 100644
--- a/rtengine/procevents.h
+++ b/rtengine/procevents.h
@@ -950,7 +950,7 @@ enum ProcEventCode {
     EvLocallabSpotcolorscope = 924,
     EvlocallabshowmasktypMethod = 925,
     Evlocallabshadmaskblsha = 926,
-
+    EvLocenamask = 927,
     NUMOFEVENTS
 };
 
diff --git a/rtengine/procparams.cc b/rtengine/procparams.cc
index f72cbcb62..0aedc8d42 100644
--- a/rtengine/procparams.cc
+++ b/rtengine/procparams.cc
@@ -3732,7 +3732,11 @@ LocallabParams::LocallabSpot::LocallabSpot() :
     sensilog(60),
     baselog(2.),
     strlog(0.0),
-    anglog(0.0)
+    anglog(0.0),
+    // mask
+    visimask(false),
+    expmask(false)
+    
 {
 }
 
@@ -4202,7 +4206,11 @@ bool LocallabParams::LocallabSpot::operator ==(const LocallabSpot& other) const
         && sensilog == other.sensilog
         && baselog == other.baselog
         && strlog == other.strlog
-        && anglog == other.anglog;
+        && anglog == other.anglog
+        // mask
+        && visimask == other.visimask
+        && expmask == other.expmask;
+        
 }
 
 bool LocallabParams::LocallabSpot::operator !=(const LocallabSpot& other) const
@@ -5696,6 +5704,10 @@ int ProcParams::save(const Glib::ustring& fname, const Glib::ustring& fname2, bo
                     saveToKeyfile(!pedited || spot_edited->strlog, "Locallab", "Strlog_" + index_str, spot.strlog, keyFile);
                     saveToKeyfile(!pedited || spot_edited->anglog, "Locallab", "Anglog_" + index_str, spot.anglog, keyFile);
                 }
+                //mask
+                if ((!pedited || spot_edited->visimask) && spot.visimask) {
+                    saveToKeyfile(!pedited || spot_edited->expmask, "Locallab", "Expmask_" + index_str, spot.expmask, keyFile);
+                }
             }
         }
 
@@ -7409,6 +7421,12 @@ int ProcParams::load(const Glib::ustring& fname, ParamsEdited* pedited)
                 assignFromKeyfile(keyFile, "Locallab", "Baselog_" + index_str, pedited, spot.baselog, spotEdited.baselog);
                 assignFromKeyfile(keyFile, "Locallab", "Strlog_" + index_str, pedited, spot.strlog, spotEdited.strlog);
                 assignFromKeyfile(keyFile, "Locallab", "Anglog_" + index_str, pedited, spot.anglog, spotEdited.anglog);
+                // mask
+                spot.visimask = assignFromKeyfile(keyFile, "Locallab", "Expmask_" + index_str, pedited, spot.expmask, spotEdited.expmask);
+
+                if (spot.visimask) {
+                    spotEdited.visimask = true;
+                }
 
                 // Append LocallabSpot and LocallabParamsEdited
                 locallab.spots.push_back(spot);
diff --git a/rtengine/procparams.h b/rtengine/procparams.h
index c304c02ff..8fafa3a46 100644
--- a/rtengine/procparams.h
+++ b/rtengine/procparams.h
@@ -1421,6 +1421,9 @@ struct LocallabParams {
         double baselog;
         double strlog;
         double anglog;
+        // mask
+        bool visimask;
+        bool expmask;
 
         LocallabSpot();
 
diff --git a/rtengine/refreshmap.cc b/rtengine/refreshmap.cc
index 773ec8b68..6ebcd74f1 100644
--- a/rtengine/refreshmap.cc
+++ b/rtengine/refreshmap.cc
@@ -953,8 +953,8 @@ int refreshmap[rtengine::NUMOFEVENTS] = {
     M_VOID,           // EvlocallabcomplexityWithoutRefresh
     LUMINANCECURVE,    // EvLocallabSpotcolorscope
     LUMINANCECURVE,    //EvlocallabshowmasktypMethod
-    LUMINANCECURVE   // Evlocallabshadmaskblsha
-
+    LUMINANCECURVE,   // Evlocallabshadmaskblsha
+    LUMINANCECURVE   //EvLocenamask
 };
 
 
diff --git a/rtgui/locallab.cc b/rtgui/locallab.cc
index a4351c710..004031c72 100644
--- a/rtgui/locallab.cc
+++ b/rtgui/locallab.cc
@@ -162,6 +162,7 @@ Locallab::Locallab():
     expcontrast(Gtk::manage(new LocallabContrast())),
     expcbdl(Gtk::manage(new LocallabCBDL())),
     explog(Gtk::manage(new LocallabLog())),
+    expmask(Gtk::manage(new LocallabMask())),
 
     // Other widgets
     resetshowButton(Gtk::manage(new Gtk::Button(M("TP_LOCALLAB_RESETSHOW"))))
@@ -198,6 +199,7 @@ Locallab::Locallab():
     addTool(toolpanel, expcontrast);
     addTool(toolpanel, expcbdl);
     addTool(toolpanel, explog);
+    addTool(toolpanel, expmask);
     panel->pack_start(*toolpanel, false, false);
 
     // Add separator
diff --git a/rtgui/locallab.h b/rtgui/locallab.h
index 8d68576f4..75523a5d3 100644
--- a/rtgui/locallab.h
+++ b/rtgui/locallab.h
@@ -115,6 +115,7 @@ private:
     LocallabContrast* const expcontrast;
     LocallabCBDL* const expcbdl;
     LocallabLog* const explog;
+    LocallabMask* const expmask;
 
     std::vector<LocallabTool*> locallabTools;
 
diff --git a/rtgui/locallabtools.h b/rtgui/locallabtools.h
index 4e6b30f00..5da061b89 100644
--- a/rtgui/locallabtools.h
+++ b/rtgui/locallabtools.h
@@ -1196,4 +1196,53 @@ private:
     void updateLogGUI();
 };
 
+
+/* ==== LocallabMask ==== */
+class LocallabMask:
+    public Gtk::VBox,
+    public LocallabTool
+{
+private:
+/*
+    Gtk::ToggleButton* const autocompute;
+    Gtk::Frame* const logPFrame;
+    Adjuster* const blackEv;
+    Adjuster* const whiteEv;
+    Gtk::CheckButton* const fullimage;
+    Gtk::CheckButton* const Autogray;
+    Adjuster* const sourceGray;
+    Adjuster* const targetGray;
+    Adjuster* const detail;
+    Adjuster* const baselog;
+    Adjuster* const sensilog;
+    Adjuster* const strlog;
+    Adjuster* const anglog;
+
+    sigc::connection autoconn, fullimageConn, AutograyConn;
+*/
+public:
+    LocallabMask();
+    void updateAdviceTooltips(const bool showTooltips) override;
+
+    void disableListener() override;
+    void enableListener() override;
+    void read(const rtengine::procparams::ProcParams* pp, const ParamsEdited* pedited = nullptr) override;
+    void write(rtengine::procparams::ProcParams* pp, ParamsEdited* pedited = nullptr) override;
+    void setDefaults(const rtengine::procparams::ProcParams* defParams, const ParamsEdited* pedited = nullptr) override;
+    void adjusterChanged(Adjuster* a, double newval) override;
+
+//    void updateAutocompute(const float blackev, const float whiteev, const float sourceg, const float targetg);
+
+private:
+    void enabledChanged() override;
+    /*
+    void autocomputeToggled();
+    void fullimageChanged();
+    void AutograyChanged();
+
+    void updateLogGUI();
+    */
+};
+
+
 #endif
diff --git a/rtgui/locallabtools2.cc b/rtgui/locallabtools2.cc
index 816bfcd30..930145bc8 100644
--- a/rtgui/locallabtools2.cc
+++ b/rtgui/locallabtools2.cc
@@ -4723,3 +4723,128 @@ void LocallabLog::updateLogGUI()
      //   targetGray->set_sensitive(true);
     }
 }
+
+
+/* ==== LocallabMask ==== */
+LocallabMask::LocallabMask():
+    LocallabTool(this, M("TP_LOCALLAB_MASK_TOOLNAME"), M("TP_LOCALLAB_MASK"), false, false)
+
+{
+    // Parameter Mask encoding specific widgets
+}
+
+void LocallabMask::updateAdviceTooltips(const bool showTooltips)
+{
+    if (showTooltips) {
+        exp->set_tooltip_text(M("TP_LOCALLAB_MASK_TOOLTIP"));
+    } else {
+        exp->set_tooltip_text(M(""));
+    }
+}
+
+void LocallabMask::disableListener()
+{
+    LocallabTool::disableListener();
+
+}
+
+void LocallabMask::enableListener()
+{
+    LocallabTool::enableListener();
+
+}
+
+void LocallabMask::read(const rtengine::procparams::ProcParams* pp, const ParamsEdited* pedited)
+{
+    // Disable all listeners
+    disableListener();
+
+    // Update GUI to selected spot value
+    const int index = pp->locallab.selspot;
+
+    if (index < (int)pp->locallab.spots.size()) {
+        const LocallabParams::LocallabSpot& spot = pp->locallab.spots.at(index);
+
+        spotName = spot.name; // Update spot name according to selected spot
+
+        exp->set_visible(spot.visimask);
+        exp->setEnabled(spot.expmask);
+
+    }
+
+    // Enable all listeners
+    enableListener();
+
+    // Update Log Encoding GUI according to autocompute button state
+//    updateLogGUI();
+
+    // Note: No need to manage pedited as batch mode is deactivated for Locallab
+}
+
+void LocallabMask::write(rtengine::procparams::ProcParams* pp, ParamsEdited* pedited)
+{
+    const int index = pp->locallab.selspot;
+
+    if (index < (int)pp->locallab.spots.size()) {
+        LocallabParams::LocallabSpot& spot = pp->locallab.spots.at(index);
+
+        spot.expmask = exp->getEnabled();
+        spot.visimask = exp->get_visible();
+
+    }
+
+    // Note: No need to manage pedited as batch mode is deactivated for Locallab
+}
+
+void LocallabMask::setDefaults(const rtengine::procparams::ProcParams* defParams, const ParamsEdited* pedited)
+{
+    const int index = defParams->locallab.selspot;
+
+    if (index < (int)defParams->locallab.spots.size()) {
+        const LocallabParams::LocallabSpot& defSpot = defParams->locallab.spots.at(index);
+
+        // Set default value for adjuster widgets
+    }
+
+    // Note: No need to manage pedited as batch mode is deactivated for Locallab
+}
+
+void LocallabMask::adjusterChanged(Adjuster* a, double newval)
+{
+    if (isLocActivated && exp->getEnabled()) {
+    }
+}
+
+
+void LocallabMask::enabledChanged()
+{
+    if (isLocActivated) {
+        if (listener) {
+            if (exp->getEnabled()) {
+                listener->panelChanged(EvLocenamask,
+                                       M("GENERAL_ENABLED") + " (" + escapeHtmlChars(spotName) + ")");
+            } else {
+                listener->panelChanged(EvLocenamask,
+                                       M("GENERAL_DISABLED") + " (" + escapeHtmlChars(spotName) + ")");
+            }
+        }
+    }
+}
+
+
+/*
+void LocallabLog::updateLogGUI()
+{
+    if (autocompute->get_active()) {
+        blackEv->set_sensitive(false);
+        whiteEv->set_sensitive(false);
+        sourceGray->set_sensitive(false);
+     //   targetGray->set_sensitive(true);
+    } else {
+        blackEv->set_sensitive(true);
+        whiteEv->set_sensitive(true);
+        sourceGray->set_sensitive(true);
+     //   targetGray->set_sensitive(true);
+    }
+}
+*/
\ No newline at end of file
diff --git a/rtgui/paramsedited.cc b/rtgui/paramsedited.cc
index bbfb7cc4e..086d6f7a6 100644
--- a/rtgui/paramsedited.cc
+++ b/rtgui/paramsedited.cc
@@ -1477,6 +1477,10 @@ void ParamsEdited::initFrom(const std::vector<rtengine::procparams::ProcParams>&
                 locallab.spots.at(j).baselog = locallab.spots.at(j).baselog && pSpot.baselog == otherSpot.baselog;
                 locallab.spots.at(j).strlog = locallab.spots.at(j).strlog && pSpot.strlog == otherSpot.strlog;
                 locallab.spots.at(j).anglog = locallab.spots.at(j).anglog && pSpot.anglog == otherSpot.anglog;
+                //mask
+                locallab.spots.at(j).visimask = locallab.spots.at(j).visimask && pSpot.visimask == otherSpot.visimask;
+                locallab.spots.at(j).expmask = locallab.spots.at(j).expmask && pSpot.expmask == otherSpot.expmask;
+                
             }
         }
 
@@ -4781,6 +4785,16 @@ void ParamsEdited::combine(rtengine::procparams::ProcParams& toEdit, const rteng
         if (locallab.spots.at(i).anglog) {
             toEdit.locallab.spots.at(i).anglog   = mods.locallab.spots.at(i).anglog;
         }
+        
+        // mask
+        if (locallab.spots.at(i).visimask) {
+            toEdit.locallab.spots.at(i).visimask = mods.locallab.spots.at(i).visimask;
+        }
+
+        if (locallab.spots.at(i).explog) {
+            toEdit.locallab.spots.at(i).expmask = mods.locallab.spots.at(i).expmask;
+        }
+        
     }
 
     if (pcvignette.enabled) {
@@ -6349,7 +6363,11 @@ LocallabParamsEdited::LocallabSpotEdited::LocallabSpotEdited(bool v) :
     sensilog(v),
     baselog(v),
     strlog(v),
-    anglog(v)
+    anglog(v),
+    // mask
+    visimask(v),
+    expmask(v)
+    
 {
 }
 
@@ -6810,6 +6828,10 @@ void LocallabParamsEdited::LocallabSpotEdited::set(bool v)
     baselog = v;
     strlog = v;
     anglog = v;
+    // mask
+    visimask = v;
+    expmask = v;
+    
 }
 
 bool CaptureSharpeningParamsEdited::isUnchanged() const
diff --git a/rtgui/paramsedited.h b/rtgui/paramsedited.h
index 1bd2e045e..be0c0e347 100644
--- a/rtgui/paramsedited.h
+++ b/rtgui/paramsedited.h
@@ -835,6 +835,9 @@ public:
         bool baselog;
         bool strlog;
         bool anglog;
+        //mask
+        bool visimask;
+        bool expmask;
 
         LocallabSpotEdited(bool v);