diff --git a/src/fgt/edit_quality/common/meshmethods.cpp b/src/fgt/edit_quality/common/meshmethods.cpp
index 48c1fb22e..aaa412eeb 100644
--- a/src/fgt/edit_quality/common/meshmethods.cpp
+++ b/src/fgt/edit_quality/common/meshmethods.cpp
@@ -80,6 +80,7 @@ int loadEqualizerInfo(QString fileName, EQUALIZER_INFO *data)
 	return result;
 }
 
+/*
 void applyColorByVertexQuality(MeshModel& mesh, TransferFunction *transferFunction, float minQuality, float maxQuality, float midHandlePercentilePosition, float brightness)
 {
 	CMeshO::VertexIterator vi;
@@ -111,4 +112,15 @@ void applyColorByVertexQuality(MeshModel& mesh, TransferFunction *transferFuncti
 
 			(*vi).C() = currentColor;
 		}
-}
+}*/
+
+void applyColorByVertexQuality(MeshModel& mesh, TransferFunction *transferFunction, float minQuality, float maxQuality, float midHandlePercentilePosition, float brightness)
+{
+	CMeshO::VertexIterator vi;
+	float percentageQuality;
+	Color4b currentColor;
+
+	for(vi=mesh.cm.vert.begin(); vi!=mesh.cm.vert.end(); ++vi)		
+		if(!(*vi).IsD()) 
+			(*vi).C() = transferFunction->getColorByQuality ((*vi).Q(), minQuality, maxQuality, midHandlePercentilePosition, brightness);
+}
\ No newline at end of file
diff --git a/src/fgt/edit_quality/common/transferfunction.cpp b/src/fgt/edit_quality/common/transferfunction.cpp
index d84873501..9f49a1ada 100644
--- a/src/fgt/edit_quality/common/transferfunction.cpp
+++ b/src/fgt/edit_quality/common/transferfunction.cpp
@@ -449,6 +449,34 @@ Color4b TransferFunction::getColorByQuality (float percentageQuality)
 		255 );
 }
 
+//converts a quality value into a color depending on the transfer function channels values, min quality, max quality, mid quality and brightness
+Color4b TransferFunction::getColorByQuality (float absoluteQuality, float minQuality, float maxQuality, float midRelativeQuality, float brightness)
+{
+	float percentageQuality;
+	Color4b currentColor;
+
+	if (absoluteQuality < minQuality)
+		percentageQuality = 0.0f;
+	else
+		if (absoluteQuality > maxQuality)
+			percentageQuality = 1.0f;
+		else
+			// calcultating relative quality and applying exponential function: rel(Q)^exp, exp=2*midHandleRelPos
+			percentageQuality = pow( (absoluteQuality - minQuality) / (maxQuality - minQuality) , (float)(2.0f*midRelativeQuality));
+
+	currentColor = getColorByQuality(percentageQuality);
+	
+	if (brightness!=1.0f) //Applying brightness to each color channel, 0<brightness<2, 1=normale brightness, 0=white, 2=black
+		if (brightness<1.0f)
+			for (int i=0; i<NUMBER_OF_CHANNELS; i++) 
+				currentColor[i] = relative2AbsoluteVali(pow(absolute2RelativeValf(currentColor[i],255.0f),brightness), 255.0f);
+		else
+			for (int i=0; i<NUMBER_OF_CHANNELS; i++) 
+				currentColor[i] = relative2AbsoluteVali(1.0f-pow(1.0f-absolute2RelativeValf(currentColor[i],255.0f),2-brightness), 255.0f);
+
+	return currentColor;
+}
+
 //saves the current color band onto an external file
 //moreover it saves info about the equalizer state
 //returns the name of the file
diff --git a/src/fgt/edit_quality/common/transferfunction.h b/src/fgt/edit_quality/common/transferfunction.h
index 0281deb07..c384b2746 100644
--- a/src/fgt/edit_quality/common/transferfunction.h
+++ b/src/fgt/edit_quality/common/transferfunction.h
@@ -213,6 +213,7 @@ public:
 	QColor* buildColorBand(void);
 	QString saveColorBand(QString fileName, EQUALIZER_INFO& equalizerInfo);
 	Color4b getColorByQuality(float percentageQuality);
+	Color4b getColorByQuality(float absoluteQuality, float minQuality, float maxQuality, float midRelativeQuality, float brightness);
 	void moveChannelAhead(TF_CHANNELS channel_code);
 	inline int	getFirstPlaneChanel(void)		{ return _channels_order[NUMBER_OF_CHANNELS-1]; }
 };
diff --git a/src/fgt/edit_quality/qualitymapper.cpp b/src/fgt/edit_quality/qualitymapper.cpp
index f2eb57b2d..4b4b4c29d 100644
--- a/src/fgt/edit_quality/qualitymapper.cpp
+++ b/src/fgt/edit_quality/qualitymapper.cpp
@@ -128,14 +128,23 @@ void QualityMapperPlugin::Decorate(QAction*, MeshModel&, GLArea*)
 	glColor4f(.3f,.3f,.3f,.3f);
 	glBegin(GL_QUAD_STRIP);
 
+
+	float maxQuality = _qualityMapperDialog->maxQuality();
+	float minQuality = _qualityMapperDialog->minQuality();
+	float brightness = _qualityMapperDialog->brightness();
+	float relativeMidQuality = _qualityMapperDialog->relativeMidQuality();
+	float step = (float)(maxQuality - minQuality)/(float)steps;
+	float curQ;
 	for(int i=0;i<steps;++i)
-		{
-			glVertex2f(barLeft,barBottom+delta*i); glVertex2f(barRight,barBottom+delta*i);
-			Color4b cc = _qualityMapperDialog->_transferFunction->getColorByQuality(float(i)/float(steps));
-			cc[3]=64;
-			glColor(cc);
-		}
-		glVertex2f(barLeft,barTop); glVertex2f(barRight,barTop);
+	{
+		glVertex2f(barLeft,barBottom+delta*i); glVertex2f(barRight,barBottom+delta*i);
+		curQ = float(i)*step + minQuality;
+		// Color4b cc = _qualityMapperDialog->_transferFunction->getColorByQuality(float(i)/float(steps));
+		Color4b cc = _qualityMapperDialog->_transferFunction->getColorByQuality(curQ, minQuality, maxQuality, relativeMidQuality, brightness);
+		cc[3]=64;
+		glColor(cc);
+	}
+	glVertex2f(barLeft,barTop); glVertex2f(barRight,barTop);
 	glEnd();
 		
 	
diff --git a/src/fgt/edit_quality/qualitymapperdialog.h b/src/fgt/edit_quality/qualitymapperdialog.h
index e967beb81..afa81ae0d 100644
--- a/src/fgt/edit_quality/qualitymapperdialog.h
+++ b/src/fgt/edit_quality/qualitymapperdialog.h
@@ -122,6 +122,11 @@ public:
 	bool initEqualizerHistogram(void);
 	void drawTransferFunction(void);
 
+	float minQuality() {return ui.minSpinBox->value();};
+	float maxQuality() {return ui.maxSpinBox->value();};
+	float relativeMidQuality() {return _equalizerMidHandlePercentilePosition;};
+	float brightness() {return (1.0f - (float)(ui.brightnessSlider->value())/(float)(ui.brightnessSlider->maximum()) )*2.0;};
+
 private:
 	Ui::QualityMapperDialogClass ui;