diff --git a/rtdata/languages/default b/rtdata/languages/default
index 556ae6d8b..a2d1edc6b 100644
--- a/rtdata/languages/default
+++ b/rtdata/languages/default
@@ -2071,6 +2071,7 @@ TP_LOCALLAB_BALAN;Balance deltaE ab-L
 TP_LOCALLAB_BILATERAL;Bilateral filter
 TP_LOCALLAB_BLENDMASKCOL;Blend
 TP_LOCALLAB_BLUR;Gaussian Blur and Noise
+TP_LOCALLAB_BLUMETHOD_TOOLTIP;To blur the background and isolate the foreground:\nBlur the background by a RT-spot fully covering the image (scope #100).\nIsolate the foreground by an excluding RT-spot with the tools you want, you can use a mask to enhance and amplify the effects 
 TP_LOCALLAB_BLMED;Median
 TP_LOCALLAB_BLGUID;Guided Filter Luminance
 TP_LOCALLAB_GUIDBL;Soft radius
diff --git a/rtengine/iplocallab.cc b/rtengine/iplocallab.cc
index b207b7e2c..96a5f2add 100644
--- a/rtengine/iplocallab.cc
+++ b/rtengine/iplocallab.cc
@@ -7090,7 +7090,7 @@ void ImProcFunctions::Lab_Local(int call, int sp, float** shbuffer, LabImage * o
                             }
 
                             double thresM = 0.05 * lp.epsb;
-                            double thresm = 0.01 * lp.epsb;
+                            double thresm = 0.001 * lp.epsb;
                             softproc(bufgb.get(), tmp1.get(), 3.f * lp.guidb, bfh, bfw, thresM, thresm, 0.1f, sk, multiThread, 0);
                         }
 
@@ -7109,7 +7109,7 @@ void ImProcFunctions::Lab_Local(int call, int sp, float** shbuffer, LabImage * o
                             }
 
                             double thresM = 0.05 * lp.epsb;
-                            double thresm = 0.01 * lp.epsb;
+                            double thresm = 0.001 * lp.epsb;
                             softproc(tmp2.get(), tmp1.get(), 3.f * lp.guidb, GH, GW, thresM, thresm, 0.1f, sk, multiThread, 0);
                         }
 
diff --git a/rtgui/locallab.cc b/rtgui/locallab.cc
index 4b2c0cd00..50412f508 100644
--- a/rtgui/locallab.cc
+++ b/rtgui/locallab.cc
@@ -240,11 +240,11 @@ Locallab::Locallab():
     laplace(Gtk::manage(new Adjuster(M("TP_LOCALLAB_LAPLACE"), 0., 100., 0.5, 25.))),
     sensisf(Gtk::manage(new Adjuster(M("TP_LOCALLAB_SENSI"), 1, 100, 1, 15))),
     // Blur & Noise
-    radius(Gtk::manage(new Adjuster(M("TP_LOCALLAB_RADIUS"), 1.0, 100.0, 0.1, 1.0))),
+    radius(Gtk::manage(new Adjuster(M("TP_LOCALLAB_RADIUS"), 1.0, 300.0, 0.1, 1.0))),
     strength(Gtk::manage(new Adjuster(M("TP_LOCALLAB_STRENGTH"), 0, 100, 1, 0))),
     itera(Gtk::manage(new Adjuster(M("TP_DIRPYRDENOISE_MEDIAN_PASSES"), 1, 4, 1, 1))),
-    guidbl(Gtk::manage(new Adjuster(M("TP_LOCALLAB_GUIDBL"), 1, 100, 1, 1))),
-    epsbl(Gtk::manage(new Adjuster(M("TP_LOCALLAB_EPSBL"), 1, 100, 1, 10))),
+    guidbl(Gtk::manage(new Adjuster(M("TP_LOCALLAB_GUIDBL"), 1, 300, 1, 1))),
+    epsbl(Gtk::manage(new Adjuster(M("TP_LOCALLAB_EPSBL"), 1, 500, 1, 10))),
     sensibn(Gtk::manage(new Adjuster(M("TP_LOCALLAB_SENSIBN"), 0, 100, 1, 40))),
     blendmaskbl(Gtk::manage(new Adjuster(M("TP_LOCALLAB_BLENDMASKCOL"), -100, 100, 1, 0))),
     radmaskbl(Gtk::manage(new Adjuster(M("TP_LOCALLAB_RADMASKCOL"), 0.0, 100.0, 0.1, 10.))),
@@ -1892,6 +1892,7 @@ Locallab::Locallab():
 
     if (showtooltip) {
 //        blMethod->set_tooltip_markup(M("TP_LOCALLAB_BLUMETHOD_TOOLTIP"));
+        expblur->set_tooltip_markup(M("TP_LOCALLAB_BLUMETHOD_TOOLTIP"));
     }
 
     blMethodConn = blMethod->signal_changed().connect(sigc::mem_fun(*this, &Locallab::blMethodChanged));