diff --git a/rtdata/languages/default b/rtdata/languages/default
index 8a5381d07..d00ec900f 100644
--- a/rtdata/languages/default
+++ b/rtdata/languages/default
@@ -765,7 +765,7 @@ HISTORY_MSG_508;L*a*b Spot circrad
 HISTORY_MSG_509;L*a*b Spot quality method
 HISTORY_MSG_510;L*a*b Spot transit
 HISTORY_MSG_511;L*a*b Spot thresh
-HISTORY_MSG_512;L*a*b Spot iter
+HISTORY_MSG_512;L*a*b Spot deltaE-weakening
 HISTORY_MSG_513;L*a*b Spot scope
 HISTORY_MSG_514;L*a*b Spot structure
 HISTORY_MSG_515;Local L*a*b*
@@ -2010,6 +2010,7 @@ TP_LOCALLAB_ENH;Enhanced
 TP_LOCALLAB_ENHDEN;Enhanced + chroma denoise
 TP_LOCALLAB_THRES;Threshold structure
 TP_LOCALLAB_PROXI;DeltaE weakening
+TP_LOCALLAB_THRESDELTAE;Threshold deltaE-scope
 TP_LOCALLAB_LIGHTNESS;Lightness
 TP_LOCALLAB_MASK;Mask:
 TP_LOCALLAB_METHOD_TOOLTIP;'Enhanced + chroma denoise' significantly increases processing times.\nBut reduce artifacts. 
diff --git a/rtengine/iplocallab.cc b/rtengine/iplocallab.cc
index cc8122089..3a68e5dbf 100644
--- a/rtengine/iplocallab.cc
+++ b/rtengine/iplocallab.cc
@@ -155,6 +155,7 @@ struct local_params {
     float iterat;
     int cir;
     float thr;
+    float stru;
     int prox;
     int chro, cont, sens, sensh, senscb, sensbn, senstm, sensex, sensexclu, sensden, senslc, senssf;
     float struco;
@@ -356,10 +357,12 @@ static void calcLocalParams(int sp, int oW, int oH, const LocallabParams& locall
     float scal_tm = ((float)locallab.spots.at(sp).scaltm) / 10.f;
     float rewe = ((float)locallab.spots.at(sp).rewei);
     float strlight = ((float)locallab.spots.at(sp).streng) / 100.f;
+    float strucc = locallab.spots.at(sp).struc;
+
     float thre = locallab.spots.at(sp).thresh;
 
-    if (thre > 12 || thre < 1) {
-        thre = 4.f;
+    if (thre > 6 || thre < 1) {//to avoid artifacts if user does not clear cache with new settings. Can be suppressed after
+        thre = 2.f;
     }
 
     double local_x = locallab.spots.at(sp).locX / 2000.0;
@@ -374,7 +377,7 @@ static void calcLocalParams(int sp, int oW, int oH, const LocallabParams& locall
     double local_dyy = locallab.spots.at(sp).iter / 8000.0;
     float iterati = (float) locallab.spots.at(sp).iter / 10.f;
 
-    if (iterati > 4.f || iterati < 1.f) {
+    if (iterati > 4.f || iterati < 1.f) {//to avoid artifacts if user does not clear cache with new settings Can be suppressed after
         iterati = 2.f;
     }
 
@@ -447,7 +450,7 @@ static void calcLocalParams(int sp, int oW, int oH, const LocallabParams& locall
     int local_sensitm = locallab.spots.at(sp).sensitm;
     int local_sensiexclu = locallab.spots.at(sp).sensiexclu;
     int local_sensilc = locallab.spots.at(sp).sensilc;
-    int local_struc = locallab.spots.at(sp).struc;
+//    int local_struc = locallab.spots.at(sp).struc;
     int local_warm = locallab.spots.at(sp).warm;
     int local_sensih = locallab.spots.at(sp).sensih;
     int local_dehaze = locallab.spots.at(sp).dehaz;
@@ -536,6 +539,7 @@ static void calcLocalParams(int sp, int oW, int oH, const LocallabParams& locall
     lp.dxx = w * local_dxx;
     lp.dyy = h * local_dyy;
     lp.thr = thre;
+    lp.stru = strucc;
     lp.noiself = local_noiself;
     lp.noiseldetail = local_noiseldetail;
     lp.noiselequal = local_noiselequal;
@@ -581,7 +585,7 @@ static void calcLocalParams(int sp, int oW, int oH, const LocallabParams& locall
     lp.hlcompthr = locallab.spots.at(sp).hlcomprthresh;
     lp.expcomp = locallab.spots.at(sp).expcomp / 100.;
     lp.sensex = local_sensiex;
-    lp.strucc = local_struc;
+//    lp.strucc = local_struc;
     lp.war = local_warm;
 }
 
@@ -1968,8 +1972,8 @@ void ImProcFunctions::DeNoise_Local(int call,  const struct local_params& lp, in
                 float dEb = 0.f;
                 dEb = sqrt(1.f * SQR(refa - origblur->a[y][x] / 327.6f) + 1.2f * SQR(refb - origblur->b[y][x] / 327.8f) + 0.8f * SQR(lumaref - rL));
 
-                float mindE = 2.f + 0.05f * lp.sensden;//between 2 and 7
-                float maxdE = 5.f + 1.5f * lp.sensden; // between 5 and 150, we can chnage this values
+                float mindE = 2.f + 0.025f * lp.sensden * lp.thr;//between 2 and 7
+                float maxdE = 5.f + 1.38f *  lp.sensden * (1 + 0.1f * lp.thr); // between 5 and 150, we can change this values, with a slider ??
                 float reducdEL = 1.f;
                 float reducdEa = 1.f;
                 float reducdEb = 1.f;
@@ -2618,8 +2622,8 @@ void ImProcFunctions::BlurNoise_Local(int call, LabImage * tmp1, LabImage * tmp2
                 cli = (buflight[loy - begy][lox - begx]);
                 clc = (bufchro[loy - begy][lox - begx]);
                 float reducdE = 0.f;
-                float mindE = 2.f + 0.05f * lp.sensbn;//between 2 and 7
-                float maxdE = 5.f + 1.5f * lp.sensbn; // between 5 and 150, we can chnage this values
+                float mindE = 2.f + 0.025f * lp.sensbn * lp.thr;//between 2 and 7
+                float maxdE = 5.f + 1.38f * lp.sensbn * (1 + 0.1f * lp.thr); // between 5 and 150, we can change this values, with a slider ??
 
                 float ar = 1.f / (mindE - maxdE);
 
@@ -2820,8 +2824,8 @@ void ImProcFunctions::InverseReti_Local(const struct local_params & lp, const fl
                 float reducdE = 0.f;
                 float dE = 0.f;
                 dE = sqrt(SQR(refa - origblur->a[y][x] / 327.68f) + SQR(refb - origblur->b[y][x] / 327.68f) + SQR(lumaref - rL));
-                float mindE = 2.f + 0.05f * lp.sensh;//between 2 and 7
-                float maxdE = 5.f + 1.5f * lp.sensh; // between 5 and 150, we can chnage this values
+                float mindE = 2.f + 0.025f * lp.sensh * lp.thr;//between 2 and 7
+                float maxdE = 5.f + 1.38f * lp.sensh * (1 + 0.1f * lp.thr); // between 5 and 150, we can change this values, with a slider ??
 
                 float ar = 1.f / (mindE - maxdE);
 
@@ -3096,8 +3100,8 @@ void ImProcFunctions::InverseSharp_Local(float **loctemp, const float hueref, co
                 float reducdE = 0.f;
                 float dE = 0.f;
                 dE = sqrt(SQR(refa - origblur->a[y][x] / 327.68f) + SQR(refb - origblur->b[y][x] / 327.68f) + SQR(lumaref - rL));
-                float mindE = 2.f + 0.05f * lp.senssha;//between 2 and 7
-                float maxdE = 5.f + 1.5f * lp.senssha; // between 5 and 150, we can chnage this values
+                float mindE = 2.f + 0.025f * lp.senssha * lp.thr;//between 2 and 7
+                float maxdE = 5.f + 1.38f * lp.senssha * (1 + 0.1f * lp.thr); // between 5 and 150, we can change this values, with a slider ??
 
                 float ar = 1.f / (mindE - maxdE);
 
@@ -3256,8 +3260,8 @@ void ImProcFunctions::Sharp_Local(int call, float **loctemp,  int senstype, cons
                 dE = sqrt(SQR(refa - origblur->a[y][x] / 327.68f) + SQR(refb - origblur->b[y][x] / 327.68f) + SQR(lumaref - rL));
 
                 float reducdE = 0.f;
-                float mindE = 2.f + 0.05f * varsens;//between 2 and 7
-                float maxdE = 5.f + 1.5f * varsens; // between 5 and 150, we can chnage this values
+                float mindE = 2.f + 0.025f * varsens * lp.thr;//between 2 and 7
+                float maxdE = 5.f + 1.38f * varsens * (1 + 0.1f * lp.thr); // between 5 and 150, we can change this values, with a slider ??
 
                 float ar = 1.f / (mindE - maxdE);
 
@@ -3434,8 +3438,8 @@ void ImProcFunctions::Exclude_Local(int sen, float **deltaso, float **buflight,
                     clc = (bufchro[loy - begy][lox - begx]);
 
                     float reducdE = 0.f;
-                    float mindE = 2.f + 0.05f * varsens;//between 2 and 7
-                    float maxdE = 5.f + 1.5f * varsens; // between 5 and 150, we can chnage this values
+                    float mindE = 2.f + 0.025f * varsens * lp.thr;//between 2 and 7
+                    float maxdE = 5.f + 1.38f * varsens * (1 + 0.1f * lp.thr); // between 5 and 150, we can change this values, with a slider ??
 
                     float ar = 1.f / (mindE - maxdE);
 
@@ -3614,7 +3618,7 @@ void ImProcFunctions::transit_shapedetect(int senstype, LabImage * bufexporig, L
 
         float k = 1.f;
 
-        if (sobelref <  meansobel && sobelref < lp.thr)//does not always work wth noisy images
+        if (sobelref <  meansobel && sobelref < lp.stru)//does not always work wth noisy images
         {
             k = -1.f;
         }
@@ -3800,8 +3804,8 @@ void ImProcFunctions::transit_shapedetect(int senstype, LabImage * bufexporig, L
                     }
 
                     float reducdE = 0.f;
-                    float mindE = 2.f + 0.05f * varsens;//between 2 and 7
-                    float maxdE = 5.f + 1.5f * varsens; // between 5 and 150, we can change this values, with a slider ??
+                    float mindE = 2.f + 0.025f * varsens * lp.thr;//between 2 and 7
+                    float maxdE = 5.f + 1.38f * varsens * (1 + 0.1f * lp.thr); // between 5 and 150, we can change this values, with a slider ??
 
                     float ar = 1.f / (mindE - maxdE);
 
@@ -4171,8 +4175,8 @@ void ImProcFunctions::InverseColorLight_Local(const struct local_params & lp, LU
                 dE = sqrt(SQR(refa - origblur->a[y][x] / 327.68f) + SQR(refb - origblur->b[y][x] / 327.68f) + SQR(lumaref - rL));
 
                 float reducdE = 0.f;
-                float mindE = 2.f + 0.05f * lp.sens;//between 2 and 7
-                float maxdE = 5.f + 1.5f * lp.sens; // between 5 and 150, we can chnage this values
+                float mindE = 2.f + 0.025f * lp.sens * lp.thr;//between 2 and 7
+                float maxdE = 5.f + 1.38f * lp.sens * (1 + 0.1f * lp.thr); // between 5 and 150, we can change this values, with a slider ??
 
                 float ar = 1.f / (mindE - maxdE);
 
@@ -4754,7 +4758,7 @@ void ImProcFunctions::Lab_Local(int call, int sp, float** shbuffer, LabImage * o
         calcLocalParams(sp, oW, oH, params->locallab, lp, llColorMask, llExpMask);
 
         const float radius = lp.rad / (sk * 1.4f); //0 to 70 ==> see skip
-        int strred = (lp.strucc - 1);
+        int strred = 1;//(lp.strucc - 1);
 
         if (strred > 1) {
             strred = 1;
diff --git a/rtengine/procparams.cc b/rtengine/procparams.cc
index 6618511f2..84daf4b8d 100644
--- a/rtengine/procparams.cc
+++ b/rtengine/procparams.cc
@@ -2342,7 +2342,7 @@ LocallabParams::LocallabSpot::LocallabSpot() :
     shape("ELI"),
     spotMethod("norm"),
     sensiexclu(12),
-    struc(0),
+    struc(4),
     shapeMethod("IND"),
     locX(250),
     locXL(250),
@@ -2353,7 +2353,7 @@ LocallabParams::LocallabSpot::LocallabSpot() :
     circrad(18),
     qualityMethod("enh"),
     transit(60),
-    thresh(4),
+    thresh(2),
     iter(20),
     // Color & Light
     expcolor(false),
diff --git a/rtgui/controlspotpanel.cc b/rtgui/controlspotpanel.cc
index 6eb1aec92..fc592cd17 100644
--- a/rtgui/controlspotpanel.cc
+++ b/rtgui/controlspotpanel.cc
@@ -46,7 +46,7 @@ ControlSpotPanel::ControlSpotPanel():
     qualityMethod_(Gtk::manage(new MyComboBoxText())),
 
     sensiexclu_(Gtk::manage(new Adjuster(M("TP_LOCALLAB_SENSIEXCLU"), 0, 100, 1, 12))),
-    struc_(Gtk::manage(new Adjuster(M("TP_LOCALLAB_STRUC"), 0, 5, 1, 0))),
+    struc_(Gtk::manage(new Adjuster(M("TP_LOCALLAB_THRES"), 1, 12, 1, 4))),
     locX_(Gtk::manage(new Adjuster(M("TP_LOCAL_WIDTH"), 0, 2250, 1, 250))),
     locXL_(Gtk::manage(new Adjuster(M("TP_LOCAL_WIDTH_L"), 0, 2250, 1, 250))),
     locY_(Gtk::manage(new Adjuster(M("TP_LOCAL_HEIGHT"), 0, 2250, 1, 250))),
@@ -55,7 +55,7 @@ ControlSpotPanel::ControlSpotPanel():
     centerY_(Gtk::manage(new Adjuster(M("TP_LOCALLAB_CENTER_Y"), -1000, 1000, 1, 0))),
     circrad_(Gtk::manage(new Adjuster(M("TP_LOCALLAB_CIRCRADIUS"), 2, 150, 1, 18))),
     transit_(Gtk::manage(new Adjuster(M("TP_LOCALLAB_TRANSIT"), 5, 95, 1, 60))),
-    thresh_(Gtk::manage(new Adjuster(M("TP_LOCALLAB_THRES"), 1, 12, 1, 4))),
+    thresh_(Gtk::manage(new Adjuster(M("TP_LOCALLAB_THRESDELTAE"), 1, 6, 1, 2))),
     iter_(Gtk::manage(new Adjuster(M("TP_LOCALLAB_PROXI"), 10, 40, 1, 20))),
 
     lastObject_(-1),
@@ -166,8 +166,6 @@ ControlSpotPanel::ControlSpotPanel():
     sensiexclu_->set_tooltip_text(M("TP_LOCALLAB_SENSIEXCLU_TOOLTIP"));
     sensiexclu_->setAdjusterListener(this);
     excluBox->pack_start(*sensiexclu_);
-    struc_->set_tooltip_text(M("TP_LOCALLAB_STRUC_TOOLTIP"));
-    struc_->setAdjusterListener(this);
     // excluBox->pack_start(*struc_); // Uncomment this line to use the struc_ adjuster
     excluFrame->add(*excluBox);
     pack_start(*excluFrame);
@@ -230,8 +228,11 @@ ControlSpotPanel::ControlSpotPanel():
     artifFrame->set_label_align(0.025, 0.5);
     artifFrame->set_tooltip_text(M("TP_LOCALLAB_ARTIF_TOOLTIP"));
     ToolParamBlock* const artifBox = Gtk::manage(new ToolParamBlock());
-    artifBox->pack_start(*thresh_);
     thresh_->setAdjusterListener(this);
+  //  struc_->set_tooltip_text(M("TP_LOCALLAB_STRUC_TOOLTIP"));
+    struc_->setAdjusterListener(this);
+    artifBox->pack_start(*struc_);
+    artifBox->pack_start(*thresh_);
     artifBox->pack_start(*iter_);
     iter_->setAdjusterListener(this);
     artifFrame->add(*artifBox);