diff --git a/rtdata/languages/default b/rtdata/languages/default
index a6ab93e9f..c8ec0839a 100644
--- a/rtdata/languages/default
+++ b/rtdata/languages/default
@@ -2332,7 +2332,7 @@ TP_WAVELET_THR;Shadows threshold
 TP_WAVELET_THRESHOLD;Finer levels
 TP_WAVELET_THRESHOLD2;Coarser levels
 TP_WAVELET_THRESHOLD_TOOLTIP;Only levels beyond the chosen value will be affected by the highlight luminance range. Other levels will be fully treated. The chosen value here limits the highest possible value of the shadow levels. : All levels from level 1 up to the chosen value will only be affected within the Finer levels luminance range.\nAll other levels will have the whole range of luminances affected, unless the Coarser levels setting limits it.\nThe chosen value in this slider becomes the minimum possible value of the Coarser levels.
-TP_WAVELET_THRESHOLD2_TOOLTIP;Only levels between 9 and 9 minus the value will be affected by the shadow luminance range. Other levels will be fully treated. The highest level possible is limited by the highlight level value (9 minus highlight level value). : Only levels between the chosen value and level 9/Extra will be affected by the Coarser levels luminance range.\nAll other levels will have the whole range of luminances affected, unless the Finer levels setting limits it.\nThe lower level possible that will be considered by the algorithm is limited by the Finer levels value.
+TP_WAVELET_THRESHOLD2_TOOLTIP;Only levels above the choosen value will be affected by the shadow luminance range. Other levels will be fully treated. The highest level possible is limited by the highlight level value (9 minus highlight level value). : Only levels between the chosen value and level 9/Extra will be affected by the Coarser levels luminance range.\nAll other levels will have the whole range of luminances affected, unless the Finer levels setting limits it.\nThe lower level possible that will be considered by the algorithm is limited by the Finer levels value.
 TP_WAVELET_THRESWAV;Balance Threshold
 TP_WAVELET_THRH;Highlights threshold
 TP_WAVELET_TILESBIG;Tiles
diff --git a/rtengine/ipwavelet.cc b/rtengine/ipwavelet.cc
index 87229d651..4740fa536 100644
--- a/rtengine/ipwavelet.cc
+++ b/rtengine/ipwavelet.cc
@@ -470,9 +470,9 @@ void ImProcFunctions::ip_wavelet(LabImage * lab, LabImage * dst, int kall, const
     cp.b_rsl = static_cast<float>(params->wavelet.bllev.getBottomRight());
     cp.t_rsl = static_cast<float>(params->wavelet.bllev.getTopRight());
 //    cp.numlevS = 9 - params->wavelet.threshold2;
-    cp.numlevS =  params->wavelet.thres - params->wavelet.threshold2;
-    int maxlevS = cp.numlevH;
-    cp.numlevS = rtengine::max(cp.numlevS, maxlevS);
+ //   cp.numlevS =  params->wavelet.thres - params->wavelet.threshold2;
+ //   int maxlevS = cp.numlevH;
+    cp.numlevS = params->wavelet.threshold2; //rtengine::max(cp.numlevS, maxlevS);
     //highlight
     cp.b_lhl = static_cast<float>(params->wavelet.hllev.getBottomLeft());
     cp.t_lhl = static_cast<float>(params->wavelet.hllev.getTopLeft());
@@ -3742,7 +3742,7 @@ void ImProcFunctions::ContAllL(float *koeLi[12], float *maxkoeLi, bool lipschitz
                     //  kLlevH = 1.f + (kLlevH - 1.f);
                 }
 
-                if (level >= (9 - cp.numlevS)) {
+                if (level >= cp.numlevS) {
                     //   if(klevred < 0.f && level >= 3) {//level > 3 to avoid bad use of the curve if user put positives values negatives
                     if ((LL100 > cp.t_lsl && LL100 < cp.t_rsl)) {
                         kLlevS = alpha;