diff --git a/toonz/sources/colorfx/colorfx.cpp b/toonz/sources/colorfx/colorfx.cpp
index f6cedc9..492b3b2 100644
--- a/toonz/sources/colorfx/colorfx.cpp
+++ b/toonz/sources/colorfx/colorfx.cpp
@@ -1,6 +1,6 @@
 
 
-// #include "tpluginmanager.h"
+
 #include "strokestyles.h"
 #include "regionstyles.h"
 #include "rasterstyles.h"
diff --git a/toonz/sources/colorfx/colorfxutils.cpp b/toonz/sources/colorfx/colorfxutils.cpp
index 3dcbae1..1073cd2 100644
--- a/toonz/sources/colorfx/colorfxutils.cpp
+++ b/toonz/sources/colorfx/colorfxutils.cpp
@@ -1,7 +1,5 @@
 
 
-//#include "tutil.h"
-//#include "tgl.h"
 #include "colorfxutils.h"
 #include "drawutil.h"
 #include "tregion.h"
@@ -152,8 +150,6 @@ void SFlashUtils::PointVector2QuadsArray(const std::vector<T3DPointD> &pv,
                                          std::vector<TQuadratic *> &quadArray,
                                          std::vector<TQuadratic *> &toBeDeleted,
                                          const bool isRounded) const {
-  std::vector<T3DPointD>::const_iterator ipv  = pv.begin();
-  std::vector<T3DPointD>::const_iterator ipve = pv.end();
   int nbPv                                    = pv.size();
   quadArray.clear();
 
@@ -235,17 +231,14 @@ void SFlashUtils::drawRegionOutline(TFlash &flash, const bool isRounded) const {
 
 int SFlashUtils::nbDiffVerts(const std::vector<TPointD> &pv) const {
   std::vector<TPointD> lpv;
-  bool isMissing[4] = {true, true, true, true};
   if (pv.size() == 0) return 0;
   lpv.push_back(pv[0]);
-  isMissing[0] = false;
   for (int i = 1; i < (int)pv.size(); i++) {
     bool isDiff = true;
     for (int j = 0; j < (int)lpv.size() && isDiff; j++)
       isDiff = lpv[j] == pv[i] ? false : isDiff;
     if (isDiff) {
       lpv.push_back(pv[i]);
-      isMissing[i] = false;
     }
   }
   return lpv.size();
diff --git a/toonz/sources/colorfx/regionstyles.cpp b/toonz/sources/colorfx/regionstyles.cpp
index 9a9d472..65b2ba2 100644
--- a/toonz/sources/colorfx/regionstyles.cpp
+++ b/toonz/sources/colorfx/regionstyles.cpp
@@ -4,18 +4,10 @@
 #include "tgl.h"
 #include "tcolorfunctions.h"
 #include "trandom.h"
-//#include "tsystem.h"
-//#include "tvectorrenderdata.h"
 #include "colorfxutils.h"
-//#include "tgl.h"
-//#include "tregionoutline.h"
-//#include "tpalette.h"
-//#include "tvectorimage.h"
-//#include "tstroke.h"
 #include "tflash.h"
 #include "tregion.h"
 #include "tcurves.h"
-//#include "drawutil.h"
 #include "tmathutil.h"
 #include "tstencilcontrol.h"
 
@@ -663,17 +655,14 @@ double ShadowStyle2::getParamValue(TColorStyle::double_tag, int index) const {
 
 static int nbDiffVerts(const std::vector<TPointD> &pv) {
   std::vector<TPointD> lpv;
-  bool isMissing[4] = {true, true, true, true};
   if (pv.size() == 0) return 0;
   lpv.push_back(pv[0]);
-  isMissing[0] = false;
   for (int i = 1; i < (int)pv.size(); i++) {
     bool isDiff = true;
     for (int j = 0; j < (int)lpv.size() && isDiff; j++)
       isDiff = lpv[j] == pv[i] ? false : isDiff;
     if (isDiff) {
       lpv.push_back(pv[i]);
-      isMissing[i] = false;
     }
   }
   return lpv.size();
diff --git a/toonz/sources/stdfx/iwa_soapbubblefx.cpp b/toonz/sources/stdfx/iwa_soapbubblefx.cpp
index d759386..a1d278a 100644
--- a/toonz/sources/stdfx/iwa_soapbubblefx.cpp
+++ b/toonz/sources/stdfx/iwa_soapbubblefx.cpp
@@ -717,7 +717,7 @@ void Iwa_SoapBubbleFx::processNoise(float* thickness_map_p, float* depth_map_p,
   float* ph_p         = noise_phases;
 
   srand(0);
-  /* Set the phase differences (0-2��) */
+  /* Set the phase differences (0-2) */
   for (int i = 0; i < whole_noise_amount; i++, ph_p++) {
     *ph_p = (float)rand() / (float)RAND_MAX * 2.0f * PI;
   }
@@ -1062,4 +1062,4 @@ void Iwa_SoapBubbleFx::fitThicknessPatches(TRasterP thickRas,
 
 //==============================================================================
 
-FX_PLUGIN_IDENTIFIER(Iwa_SoapBubbleFx, "iwa_SoapBubbleFx");
\ No newline at end of file
+FX_PLUGIN_IDENTIFIER(Iwa_SoapBubbleFx, "iwa_SoapBubbleFx");