diff --git a/rtengine/dcrop.cc b/rtengine/dcrop.cc
index dc15702e6..70e9a7d51 100644
--- a/rtengine/dcrop.cc
+++ b/rtengine/dcrop.cc
@@ -947,8 +947,8 @@ void Crop::update(int todo)
                                                 hltonecurveloc2, shtonecurveloc2, tonecurveloc2, lightCurveloc2,
                                                 sca);
 
-                parent->ipf.Lab_Local(1, sp, parent->sobelrefs, (float**)shbuffer, labnCrop, labnCrop, reservCrop, cropx / skip, cropy / skip, skips(parent->fw, skip), skips(parent->fh, skip), skip, locRETgainCurve, lllocalcurve2,
-                                      loclhCurve, lochhCurve, LHutili, HHutili, cclocalcurve2, localskutili, sklocalcurve2, localexutili, exlocalcurve2, hltonecurveloc2, shtonecurveloc2, tonecurveloc2, lightCurveloc2, huerefblu, huere, chromare, lumare, sobelre);
+                parent->ipf.Lab_Local(1, sp, parent->sobelrefs, (float**)shbuffer, labnCrop, labnCrop, reservCrop, cropx / skip, cropy / skip, skips(parent->fw, skip), skips(parent->fh, skip), skip, locRETgainCurve, lllocalcurve2, 
+                                      loclhCurve, lochhCurve, locccmasCurve, locllmasCurve, CCmaskutili, LLmaskutili, LHutili, HHutili, cclocalcurve2, localskutili, sklocalcurve2, localexutili, exlocalcurve2, hltonecurveloc2, shtonecurveloc2, tonecurveloc2, lightCurveloc2, huerefblu, huere, chromare, lumare, sobelre);
 
                 lllocalcurve2.clear();
                 cclocalcurve2.clear();
diff --git a/rtengine/improccoordinator.cc b/rtengine/improccoordinator.cc
index de8bb8c74..992213ddb 100644
--- a/rtengine/improccoordinator.cc
+++ b/rtengine/improccoordinator.cc
@@ -825,7 +825,7 @@ void ImProcCoordinator::updatePreviewImage(int todo, bool panningRelatedChange)
                  * - maxspot, huerefs, centerx and centery aren't used in Lab_Local (only for printf) so values aren't important
                  * - shbuffer is used as nullptr
                  */
-                ipf.Lab_Local(3, sp, sobelrefs, (float**)shbuffer, nprevl, nprevl, reserv, 0, 0, pW, pH, scale, locRETgainCurve, lllocalcurve, loclhCurve,  lochhCurve,
+                ipf.Lab_Local(3, sp, sobelrefs, (float**)shbuffer, nprevl, nprevl, reserv, 0, 0, pW, pH, scale, locRETgainCurve, lllocalcurve, loclhCurve,  lochhCurve, locccmasCurve, locllmasCurve, CCmaskutili, LLmaskutili,
                               LHutili, HHutili, cclocalcurve, localskutili, sklocalcurve, localexutili, exlocalcurve, hltonecurveloc, shtonecurveloc, tonecurveloc, lightCurveloc, huerblu, huer, chromar, lumar, sobeler);
 
                 if (params.locallab.spots.at(sp).spotMethod == "exc") {
diff --git a/rtengine/improcfun.h b/rtengine/improcfun.h
index 4fda11f1b..8c9ba5e2e 100644
--- a/rtengine/improcfun.h
+++ b/rtengine/improcfun.h
@@ -289,7 +289,7 @@ public:
     void calc_ref(int sp, LabImage* original, LabImage* transformed, int cx, int cy, int oW, int oH, int sk, double &huerefblur, double &huere, double &chromare, double &lumare, double &sobelref, LUTu & histogram);
     void copy_ref(LabImage* spotbuffer, LabImage* original, LabImage* transformed, int cx, int cy, int sk, const struct local_params & lp, double &huerefspot, double &chromarefspot, double &lumarefspot);
     void paste_ref(LabImage* spotbuffer, LabImage* transformed, int cx, int cy, int sk, const struct local_params & lp);
-    void Lab_Local(int call, int sp, LUTf & sobelrefs,  float** shbuffer, LabImage* original, LabImage* transformed, LabImage* reserved, int cx, int cy, int oW, int oH, int sk, const LocretigainCurve & locRETgainCcurve, LUTf & lllocalcurve, const LocLHCurve & loclhCurve,  const LocHHCurve & lochhCurve, bool &LHutili, bool &HHutili, LUTf & cclocalcurve, bool & localskutili, LUTf & sklocalcurve, bool & localexutili, LUTf & exlocalcurve, LUTf & hltonecurve, LUTf & shtonecurve, LUTf & tonecurve, LUTf & lightCurveloc, double & huerefblur, double &hueref, double &chromaref, double &lumaref, double &sobelref);
+    void Lab_Local(int call, int sp, LUTf & sobelrefs,  float** shbuffer, LabImage* original, LabImage* transformed, LabImage* reserved, int cx, int cy, int oW, int oH, int sk, const LocretigainCurve & locRETgainCcurve, LUTf & lllocalcurve, const LocLHCurve & loclhCurve,  const LocHHCurve & lochhCurve, const LocCCmaskCurve & locccmasCurve, const  LocLLmaskCurve & locllmasCurve, bool CCmaskutili, bool LLmaskutili, bool &LHutili, bool &HHutili, LUTf & cclocalcurve, bool & localskutili, LUTf & sklocalcurve, bool & localexutili, LUTf & exlocalcurve, LUTf & hltonecurve, LUTf & shtonecurve, LUTf & tonecurve, LUTf & lightCurveloc, double & huerefblur, double &hueref, double &chromaref, double &lumaref, double &sobelref);
     void addGaNoise(LabImage *lab, LabImage *dst, const float mean, const float variance, const int sk);
     void BlurNoise_Localold(int call, const struct local_params& lp, LabImage* original, LabImage* transformed, const LabImage* const tmp1, int cx, int cy);
     void InverseBlurNoise_Local(const struct local_params& lp, LabImage* original, LabImage* transformed, const LabImage* const tmp1, int cx, int cy);
diff --git a/rtengine/iplocallab.cc b/rtengine/iplocallab.cc
index dd1bcbcda..f7d363f51 100644
--- a/rtengine/iplocallab.cc
+++ b/rtengine/iplocallab.cc
@@ -7504,7 +7504,7 @@ void ImProcFunctions::fftw_denoise(int GW, int GH, int max_numblox_W, int min_nu
 
 
 void ImProcFunctions::Lab_Local(int call, int sp, LUTf & sobelrefs, float** shbuffer, LabImage * original, LabImage * transformed, LabImage * reserved, int cx, int cy, int oW, int oH, int sk,
-                                const LocretigainCurve & locRETgainCcurve, LUTf & lllocalcurve, const LocLHCurve & loclhCurve,  const LocHHCurve & lochhCurve,
+                                const LocretigainCurve & locRETgainCcurve, LUTf & lllocalcurve, const LocLHCurve & loclhCurve,  const LocHHCurve & lochhCurve, const LocCCmaskCurve & locccmasCurve, const  LocLLmaskCurve & locllmasCurve, bool CCmaskutili, bool LLmaskutili, 
                                 bool & LHutili, bool & HHutili, LUTf & cclocalcurve, bool & localskutili, LUTf & sklocalcurve, bool & localexutili, LUTf & exlocalcurve, LUTf & hltonecurveloc, LUTf & shtonecurveloc, LUTf & tonecurveloc, LUTf & lightCurveloc, double & huerefblur, double & hueref, double & chromaref, double & lumaref, double & sobelref)
 {
     //general call of others functions : important return hueref, chromaref, lumaref
diff --git a/rtengine/procparams.h b/rtengine/procparams.h
index 7a1d4158f..94c25a80b 100644
--- a/rtengine/procparams.h
+++ b/rtengine/procparams.h
@@ -47,6 +47,8 @@ class LocretigainCurve;
 class LocretigainCurverab;
 class LocLHCurve;
 class LocHHCurve;
+class LocLLmaskCurve;
+class LocCCmaskCurve;
 
 enum RenderingIntent {
     RI_PERCEPTUAL = INTENT_PERCEPTUAL,
diff --git a/rtengine/simpleprocess.cc b/rtengine/simpleprocess.cc
index 2fa12d8fd..82b1819b4 100644
--- a/rtengine/simpleprocess.cc
+++ b/rtengine/simpleprocess.cc
@@ -1137,7 +1137,7 @@ private:
                                                 hltonecurveloc, shtonecurveloc, tonecurveloc, lightCurveloc,
                                                 1);
 
-                ipf.Lab_Local(2, sp, sobelrefs, (float**)shbuffer, labView, labView, reservView, 0, 0, fw, fh,  1, locRETgainCurve, lllocalcurve, loclhCurve, lochhCurve,
+                ipf.Lab_Local(2, sp, sobelrefs, (float**)shbuffer, labView, labView, reservView, 0, 0, fw, fh,  1, locRETgainCurve, lllocalcurve, loclhCurve, lochhCurve, locccmasCurve, locllmasCurve, CCmaskutili, LLmaskutili,
                               LHutili, HHutili, cclocalcurve, localskutili, sklocalcurve, localexutili, exlocalcurve, hltonecurveloc, shtonecurveloc, tonecurveloc, lightCurveloc, huerefblu, huere, chromare, lumare, sobelre);
 
                 // Clear local curves