diff --git a/rtengine/color.cc b/rtengine/color.cc
index 23f1ad9f6..de6f6f64b 100644
--- a/rtengine/color.cc
+++ b/rtengine/color.cc
@@ -1553,6 +1553,7 @@ void Color::calcGamma (double pwr, double ts, GammaValues &gamma)
     gamma[4] = g[4];
     gamma[5] = g[5];
     gamma[6] = 0.;
+    printf("g0=%f g1=%f g2=%f g3=%f g4=%f g5=%f\n", g[0], g[1], g[2], g[3], g[4], g[5] );
 }
 void Color::gammaf2lut (LUTf &gammacurve, float gamma, float start, float slope, float divisor, float factor)
 {
diff --git a/rtengine/iplocallab.cc b/rtengine/iplocallab.cc
index 729a0bb0c..b9f256dc8 100644
--- a/rtengine/iplocallab.cc
+++ b/rtengine/iplocallab.cc
@@ -1570,12 +1570,14 @@ void ImProcFunctions::log_encode(Imagefloat *rgb, struct local_params & lp, bool
    // BENCHFUN
     const float gray = lp.sourcegray / 100.f;
     const float shadows_range = lp.blackev;
+    /*
     if(lp.whiteev < 1.5f) {
         lp.whiteev = 1.5f;
     }
+    */
     float dynamic_range = lp.whiteev - lp.blackev;
-    if (dynamic_range < 1.f) {
-        dynamic_range = 1.f;
+    if (dynamic_range < 0.5f) {
+        dynamic_range = 0.5f;
     }
     const float noise = pow_F(2.f, -16.f);
     const float log2 = xlogf(lp.baselog);
@@ -1654,9 +1656,14 @@ void ImProcFunctions::log_encode(Imagefloat *rgb, struct local_params & lp, bool
                 if (m > noise) {
                     float mm = apply(m);
                     float f = mm / m;
+                    f = min(f, 1000000.f);
+                    
                     r *= f;
                     b *= f;
                     g *= f;
+                    r = CLIP(r);
+                    g = CLIP(g);
+                    b = CLIP(b);
                 }
 
                 assert(r == r);
@@ -1710,13 +1717,18 @@ void ImProcFunctions::log_encode(Imagefloat *rgb, struct local_params & lp, bool
                     //   float t2 = norm(r, g, b);
                     float f2 = apply(t2) / t2;
                     f = intp(blend, f, f2);
-                    assert(std::isfinite(f));
+                    f = min(f, 1000000.f);
+                   
+               //     assert(std::isfinite(f));
                     r *= f;
                     g *= f;
                     b *= f;
-                    assert(std::isfinite(r));
-                    assert(std::isfinite(g));
-                    assert(std::isfinite(b));
+                    r = CLIP(r);
+                    g = CLIP(g);
+                    b = CLIP(b);
+               //     assert(std::isfinite(r));
+               //     assert(std::isfinite(g));
+               //     assert(std::isfinite(b));
                 }
             }
         }
diff --git a/rtgui/locallabtools.cc b/rtgui/locallabtools.cc
index f9dbab2eb..68908b33a 100644
--- a/rtgui/locallabtools.cc
+++ b/rtgui/locallabtools.cc
@@ -3611,6 +3611,7 @@ LocallabShadow::LocallabShadow():
     blurSHde->setAdjusterListener(this);
 
     gamSH->setAdjusterListener(this);
+    sloSH->setLogScale(16, 0);
 
     sloSH->setAdjusterListener(this);
 
diff --git a/rtgui/locallabtools2.cc b/rtgui/locallabtools2.cc
index 00f36cd9c..c2535ed0a 100644
--- a/rtgui/locallabtools2.cc
+++ b/rtgui/locallabtools2.cc
@@ -4655,13 +4655,13 @@ LocallabLog::LocallabLog():
     autocompute(Gtk::manage(new Gtk::ToggleButton(M("TP_LOCALLAB_LOGAUTO")))),
     logPFrame(Gtk::manage(new Gtk::Frame(M("TP_LOCALLAB_LOGPFRA")))),
     blackEv(Gtk::manage(new Adjuster(M("TP_LOCALLAB_BLACK_EV"), -16.0, 0.0, 0.1, -5.0))),
-    whiteEv(Gtk::manage(new Adjuster(M("TP_LOCALLAB_WHITE_EV"), 1.5, 32.0, 0.1, 10.0))),
+    whiteEv(Gtk::manage(new Adjuster(M("TP_LOCALLAB_WHITE_EV"), 0., 32.0, 0.1, 10.0))),
     fullimage(Gtk::manage(new Gtk::CheckButton(M("TP_LOCALLAB_FULLIMAGE")))),
     Autogray(Gtk::manage(new Gtk::CheckButton(M("TP_LOCALLAB_AUTOGRAY")))),
     sourceGray(Gtk::manage(new Adjuster(M("TP_LOCALLAB_SOURCE_GRAY"), 1.0, 100.0, 0.1, 10.0))),
     targetGray(Gtk::manage(new Adjuster(M("TP_LOCALLAB_TARGET_GRAY"), 5.0, 80.0, 0.1, 18.0))),
     detail(Gtk::manage(new Adjuster(M("TP_LOCALLAB_DETAIL"), 0., 1., 0.01, 0.6))),
-    baselog(Gtk::manage(new Adjuster(M("TP_LOCALLAB_BASELOG"), 1.4, 8., 0.05, 2., Gtk::manage(new RTImage("circle-black-small.png")), Gtk::manage(new RTImage("circle-white-small.png"))))),
+    baselog(Gtk::manage(new Adjuster(M("TP_LOCALLAB_BASELOG"), 1.3, 8., 0.05, 2., Gtk::manage(new RTImage("circle-black-small.png")), Gtk::manage(new RTImage("circle-white-small.png"))))),
     sensilog(Gtk::manage(new Adjuster(M("TP_LOCALLAB_SENSI"), 0, 100, 1, 60))),
     strlog(Gtk::manage(new Adjuster(M("TP_LOCALLAB_GRADSTR"), -2.0, 2.0, 0.05, 0.))),
     anglog(Gtk::manage(new Adjuster(M("TP_LOCALLAB_GRADANG"), -180, 180, 0.1, 0.)))
@@ -4669,10 +4669,10 @@ LocallabLog::LocallabLog():
     // Parameter Log encoding specific widgets
     autoconn = autocompute->signal_toggled().connect(sigc::mem_fun(*this, &LocallabLog::autocomputeToggled));
 
-  //  blackEv->setLogScale(2, -8);
+    blackEv->setLogScale(2, -8);
     blackEv->setAdjusterListener(this);
 
-   // whiteEv->setLogScale(16, 0);
+    whiteEv->setLogScale(16, 0);
     whiteEv->setAdjusterListener(this);
 
     fullimageConn = fullimage->signal_toggled().connect(sigc::mem_fun(*this, &LocallabLog::fullimageChanged));
@@ -4802,9 +4802,10 @@ void LocallabLog::read(const rtengine::procparams::ProcParams* pp, const ParamsE
         blackEv->setValue(spot.blackEv);
 
         whiteEv->setValue(spot.whiteEv);
-        if(whiteEv->getValue() < 1.5){
+/*        if(whiteEv->getValue() < 1.5){
             whiteEv->setValue(1.5);
         }
+*/
         fullimage->set_active(spot.fullimage);
         Autogray->set_active(spot.Autogray);
         sourceGray->setValue(spot.sourceGray);