diff --git a/rtengine/iplocallab.cc b/rtengine/iplocallab.cc
index 820fda599..b28ff6fcc 100644
--- a/rtengine/iplocallab.cc
+++ b/rtengine/iplocallab.cc
@@ -9784,9 +9784,14 @@ void ImProcFunctions::Lab_Local(
                 guid[ir][jr] /= 32768.f;
             }
 
-        const float blur = 25 / sk * (10.f + 0.8f * lp.struexp);
 
-        rtengine::guidedFilter(guid, ble, ble, blur, 0.001, multiThread);
+        const float blur = 25 / sk * (2.f + 2.5f * lp.struexp);
+
+        rtengine::guidedFilter(guid, ble, ble, blur, 0.0001, multiThread);
+
+//        const float blur = 25 / sk * (10.f + 0.8f * lp.struexp);
+
+//        rtengine::guidedFilter(guid, ble, ble, blur, 0.001, multiThread);
 
         double sombel = 0.f;
         const int ncsobel = bfh * bfw;
diff --git a/rtgui/controlspotpanel.cc b/rtgui/controlspotpanel.cc
index 525632f40..900c5cd01 100644
--- a/rtgui/controlspotpanel.cc
+++ b/rtgui/controlspotpanel.cc
@@ -217,6 +217,8 @@ ControlSpotPanel::ControlSpotPanel():
 
     sensiexclu_->setAdjusterListener(this);
     structexclu_->setAdjusterListener(this);
+    structexclu_->setLogScale(10, 0);
+    
     excluBox->pack_start(*sensiexclu_);
     excluBox->pack_start(*structexclu_);
     excluFrame->add(*excluBox);