diff --git a/rtengine/improcfun.h b/rtengine/improcfun.h
index 8510ef83e..d9e60eac3 100644
--- a/rtengine/improcfun.h
+++ b/rtengine/improcfun.h
@@ -210,7 +210,7 @@ public:
 
     void EPDToneMapResid(float * WavCoeffs_L0, unsigned int Iterates,  int skip, struct cont_params& cp, int W_L, int H_L, float max0, float min0);
     void CompressDR(float *Source, int W_L, int H_L, float Compression, float DetailBoost);
-    void Compresslevels(float **Source, int W_L, int H_L, float compression, float detailBoost, float thres, float maxp, float maxn);
+    void Compresslevels(float **Source, int W_L, int H_L, float compression, float detailBoost, float thres);//, float maxp, float maxn);
     void ContrastResid(float * WavCoeffs_L0, struct cont_params &cp, int W_L, int H_L, float max0, float min0);
 
     void EPDToneMap(LabImage *lab, unsigned int Iterates = 0, int skip = 1);
diff --git a/rtengine/iplocallab.cc b/rtengine/iplocallab.cc
index 4468b1b37..cbc2dc07f 100644
--- a/rtengine/iplocallab.cc
+++ b/rtengine/iplocallab.cc
@@ -7044,12 +7044,12 @@ void ImProcFunctions::wavcbd(wavelet_decomposition &wdspot, int level_bl, int ma
 
 }
 
-void ImProcFunctions::Compresslevels(float **Source, int W_L, int H_L, float compression, float detailBoost, float thres, float maxp, float maxn)
+void ImProcFunctions::Compresslevels(float **Source, int W_L, int H_L, float compression, float detailBoost, float thres)//, float maxp, float maxn)
 {
     //J.Desmis 12-2019
 
     float exponent;
-    printf("maxp=%f maxn=%f\n", maxp, maxn);
+   // printf("maxp=%f maxn=%f\n", maxp, maxn);
     if (detailBoost > 0.f && detailBoost < 0.05f) {
         float betemp = expf(-(2.f - detailBoost + 0.693147f)) - 1.f; //0.69315 = log(2)
         exponent = 1.2f * xlogf(-betemp);
@@ -7178,10 +7178,10 @@ void ImProcFunctions::wavcont(wavelet_decomposition &wdspot, float ****templevel
                     }
                     
                     float thresref = mean[level];
-                    float thresreal = 0.2f * thres * thresref;//to take into account noise and artifacts
+                    float thresreal = 0.1f * thres * thresref;//to take into account noise and artifacts
+               //     printf("mean=%f sig=%f\n", mean[level], sigma[level]);
                     
-                    
-                    Compresslevels(templevel[dir - 1][level], W_L, H_L, compression, detailBoost, thresreal, MaxP[level], MaxN[level]);
+                    Compresslevels(templevel[dir - 1][level], W_L, H_L, compression, detailBoost, thresreal);//, MaxP[level], MaxN[level]);
                 }
             }
         }
diff --git a/rtengine/procparams.cc b/rtengine/procparams.cc
index 50fd52644..26c824f0b 100644
--- a/rtengine/procparams.cc
+++ b/rtengine/procparams.cc
@@ -2729,7 +2729,7 @@ LocallabParams::LocallabSpot::LocallabSpot() :
     residcomp(0.0),
     sigma(1.0),
     offset(1.0),
-    threswav(0.1),
+    threswav(0.05),
     chromalev(1.0),
     chromablu(1.0),
     fatdet(40.0),
diff --git a/rtgui/locallab.cc b/rtgui/locallab.cc
index e084f319c..72f7bef9f 100644
--- a/rtgui/locallab.cc
+++ b/rtgui/locallab.cc
@@ -582,7 +582,7 @@ residchro(Gtk::manage(new Adjuster(M("TP_LOCALLAB_RESIDCHRO"), -100., 100., 1.,
 residcomp(Gtk::manage(new Adjuster(M("TP_LOCALLAB_RESIDCOMP"), -1., 1., 0.01, 0.))),
 sigma(Gtk::manage(new Adjuster(M("TP_LOCALLAB_SIGMAWAV"), 0.2, 2.5, 0.01, 1.))),
 offset(Gtk::manage(new Adjuster(M("TP_LOCALLAB_OFFSETWAV"), 0.33, 1.66, 0.01, 1., Gtk::manage(new RTImage("circle-black-small.png")), Gtk::manage(new RTImage("circle-white-small.png"))))),
-threswav(Gtk::manage(new Adjuster(M("TP_LOCALLAB_THRESWAV"), 0.001, 1., 0.001, 0.1))),
+threswav(Gtk::manage(new Adjuster(M("TP_LOCALLAB_THRESWAV"), 0.001, 1., 0.001, 0.05))),
 chromalev(Gtk::manage(new Adjuster(M("TP_LOCALLAB_CHROMALEV"), 0.01, 2., 0.01, 1.))),
 chromablu(Gtk::manage(new Adjuster(M("TP_LOCALLAB_CHROMABLU"), 0.01, 2., 0.01, 1.))),
 fatdet(Gtk::manage(new Adjuster(M("TP_LOCALLAB_FATDETAIL"), -100., 300., 1., 0.))),