diff --git a/rtengine/improccoordinator.cc b/rtengine/improccoordinator.cc
index bbc37cd2a..6a93d1d82 100644
--- a/rtengine/improccoordinator.cc
+++ b/rtengine/improccoordinator.cc
@@ -934,8 +934,15 @@ void ImProcCoordinator::updatePreviewImage(int todo, bool panningRelatedChange)
 
                         for (int ir = 0; ir < pH; ir++)
                             for (int jr = 0; jr < pW; jr++) {
+                                float X, Y, Z;
+                                float L = provradius->L[ir][jr];
+                                float a = provradius->a[ir][jr];
+                                float b = provradius->b[ir][jr];
+                                Color::Lab2XYZ(L, a, b, X, Y, Z);
+
+                                guid[ir][jr] = Y / 32768.f;
+                                
                                 ble[ir][jr] = (nprevl->L[ir][jr]) / 32768.f;
-                                guid[ir][jr] = provradius->L[ir][jr] / 32768.f;
                             }
                         double epsilmax = 0.0001;
                         double epsilmin = 0.00001;
diff --git a/rtengine/ipwavelet.cc b/rtengine/ipwavelet.cc
index 4b46c9742..8a2e3eeda 100644
--- a/rtengine/ipwavelet.cc
+++ b/rtengine/ipwavelet.cc
@@ -1285,7 +1285,15 @@ void ImProcFunctions::ip_wavelet(LabImage * lab, LabImage * dst, int kall, const
         for (int ir = 0; ir < lab->H; ir++)
             for (int jr = 0; jr < lab->W; jr++) {
                 ble[ir][jr] = dst->L[ir][jr] / 32768.f;
-                guid[ir][jr] = provradius->L[ir][jr] / 32768.f;
+                float X, Y, Z;
+                float L = provradius->L[ir][jr];
+                float a = provradius->a[ir][jr];
+                float b = provradius->b[ir][jr];
+                Color::Lab2XYZ(L, a, b, X, Y, Z);
+
+                guid[ir][jr] = Y / 32768.f;
+                
+//                guid[ir][jr] = provradius->L[ir][jr] / 32768.f;
             }
 
         double epsilmax = 0.001;
diff --git a/rtgui/wavelet.cc b/rtgui/wavelet.cc
index 4aa18f5bd..375e0a8cf 100644
--- a/rtgui/wavelet.cc
+++ b/rtgui/wavelet.cc
@@ -120,8 +120,8 @@ Wavelet::Wavelet() :
     edgeampli(Gtk::manage(new Adjuster(M("TP_WAVELET_EDGEAMPLI"), 0, 100, 1, 10))),
     mergeL(Gtk::manage(new Adjuster(M("TP_WAVELET_MERGEL"), -50, 100, 1, 40))),
     mergeC(Gtk::manage(new Adjuster(M("TP_WAVELET_MERGEC"), -50, 100, 1, 20))),
-    softrad(Gtk::manage(new Adjuster(M("TP_WAVELET_SOFTRAD"), 0.0, 100., 0.1, 0.))),
-    softradend(Gtk::manage(new Adjuster(M("TP_WAVELET_SOFTRAD"), 0.0, 100., 0.1, 0.))),
+    softrad(Gtk::manage(new Adjuster(M("TP_WAVELET_SOFTRAD"), 0.0, 100., 0.5, 0.))),
+    softradend(Gtk::manage(new Adjuster(M("TP_WAVELET_SOFTRAD"), 0.0, 100., 0.5, 0.))),
     Lmethod(Gtk::manage(new MyComboBoxText())),
     CHmethod(Gtk::manage(new MyComboBoxText())),
     CHSLmethod(Gtk::manage(new MyComboBoxText())),