diff --git a/relight-pano/main.cpp b/relight-pano/main.cpp
index e8a03e5..135a1e5 100644
--- a/relight-pano/main.cpp
+++ b/relight-pano/main.cpp
@@ -71,7 +71,13 @@ int main(int argc, char *argv[])
 				}
 				startingStep = (PanoBuilder::Steps) s;
 			}
-			builder.setMm3d("/Users/erika/Desktop/micmac/bin/mm3d");
+			builder.setMm3d("/home/ponchio/devel/micmac/bin/mm3d");
+			//"/Users/erika/Desktop/micmac/bin/mm3d");
+			builder.setRelightCli("/home/ponchio/devel/relight/relight-cli/relight-cli");
+			//"/Users/erika/Desktop/projects/relight/build/relight-cli/relight-cli";
+			builder.setRelightMerge("/home/ponchio/devel/relight/relight-merge/relight-merge");
+			//"/Users/erika/Desktop/projects/relight/build/relight-cli/relight-merge";
+
 			builder.process(startingStep);
 		}
 		catch(QString error){
diff --git a/relight-pano/panobuilder.cpp b/relight-pano/panobuilder.cpp
index e17c9a4..b3211f3 100644
--- a/relight-pano/panobuilder.cpp
+++ b/relight-pano/panobuilder.cpp
@@ -20,12 +20,12 @@ void PanoBuilder::setMm3d(QString path){
 	ensureExecutable(path);
 	mm3d_path = path;
 }
-void PanoBuilder::relightCli(QString path){
+void PanoBuilder::setRelightCli(QString path){
 	ensureExecutable(path);
 
 	relight_cli_path = path;
 }
-void PanoBuilder::relightMerge(QString path){
+void PanoBuilder::setRelightMerge(QString path){
 	ensureExecutable(path);
 	relight_merge_path = path;
 }
@@ -103,6 +103,14 @@ void PanoBuilder::rti(){
 
 		}
 	}
+
+	QDir mergeDir(base_dir.filePath("merge"));
+	if (!mergeDir.exists()) {
+		if (!base_dir.mkdir("merge")) {
+			throw QString("Could not create 'merge' directory");
+		}
+	}
+
 	//search the subdirectory, the QDir::Dirs | filter QDir::NoDotAndDotDot to get all subdirectories inside the root directory
 	QStringList subDirs = datasets_dir.entryList(QDir::Dirs | QDir::NoDotAndDotDot);
 	for (const QString &subDirName : subDirs) {
@@ -115,23 +123,38 @@ void PanoBuilder::rti(){
 		QString relightFile = relightFiles[0];
 
 
-		QString program = "/Users/erika/Desktop/projects/relight/build/relight-cli/relight-cli";
 		QStringList arguments;
 		arguments << subDir.absoluteFilePath(relightFile) << rtiDir.filePath(subDir.dirName()) <<"-b" << "ptm" << "-p" << "18" << "-m";
 
-		QString command = program + " " + arguments.join(" ");
+		QString command = relight_cli_path + " " + arguments.join(" ");
 		cout << "print command: " << qPrintable(command) <<endl;
-		QProcess process;
-		process.start(program, arguments);
+		QProcess process_cli;
+		process_cli.start(relight_cli_path, arguments);
+
+		if(!process_cli.waitForStarted()){
+			throw QString("fail to start ") + process_cli.program();
+		}
 
-		if(!process.waitForStarted()){
-			throw QString("fail to start ") + process.program();
+		//wait for the process to finish
+		if(!process_cli.waitForFinished(-1)) {
+			throw QString("fail to run ") + process_cli.readAllStandardError();
+		}
+
+
+		QStringList arguments_merge;
+		arguments_merge << "rti" << "merge";
+		QProcess process_merge;
+		process_merge.start(relight_merge_path, arguments_merge);
+
+		if(!process_merge.waitForStarted()){
+			throw QString("fail to start ") + process_merge.program();
 		}
 
 		//wait for the process to finish
-		if(!process.waitForFinished(-1)) {
-			throw QString("fail to run ") + process.readAllStandardError();
+		if(!process_merge.waitForFinished(-1)) {
+			throw QString("fail to run ") + process_merge.readAllStandardError();
 		}
+
 	}
 }
 void PanoBuilder::tapioca(){
diff --git a/relight-pano/panobuilder.h b/relight-pano/panobuilder.h
index 100405b..7b0538f 100644
--- a/relight-pano/panobuilder.h
+++ b/relight-pano/panobuilder.h
@@ -35,8 +35,8 @@ class PanoBuilder : public QObject
 
 	PanoBuilder(QString path);
 	void setMm3d(QString path);
-	void relightCli(QString path);
-	void relightMerge(QString path);
+	void setRelightCli(QString path);
+	void setRelightMerge(QString path);
 	int findStep(QString step);
 
 	void process(Steps starting_step = RTI);
diff --git a/relight-pano/qexifimageheader.cpp b/relight-pano/qexifimageheader.cpp
index 0c05ae1..c96e86b 100644
--- a/relight-pano/qexifimageheader.cpp
+++ b/relight-pano/qexifimageheader.cpp
@@ -1684,7 +1684,9 @@ qint64 QExifImageHeader::write(QIODevice *device) const
     else
         stream << quint32(0);
     writeExifValues( stream, d->imageIfdValues );
-    Q_ASSERT(startPos + exifIfdOffset == device->pos());
+#ifndef QT_NO_DEBUG
+	Q_ASSERT(startPos + exifIfdOffset == device->pos());
+#endif
     stream << quint16(d->exifIfdValues.count());
     // 2014-02-03 Sig
     exifIfdOffset += 2; // add 2 bytes for d->exifIfdValues.count()
@@ -1692,14 +1694,18 @@ qint64 QExifImageHeader::write(QIODevice *device) const
     // Sig
     writeExifHeaders(stream, d->exifIfdValues, exifIfdOffset);
     writeExifValues(stream, d->exifIfdValues);
+#ifndef QT_NO_DEBUG
     Q_ASSERT(startPos + gpsIfdOffset == device->pos());
-    if (!d->gpsIfdValues.isEmpty()) {
+#endif
+	if (!d->gpsIfdValues.isEmpty()) {
         stream << quint16(d->gpsIfdValues.count());
         writeExifHeaders(stream, d->gpsIfdValues, gpsIfdOffset);
         writeExifValues(stream, d->gpsIfdValues);
     }
+#ifndef QT_NO_DEBUG
     Q_ASSERT(startPos + offset == device->pos());
-    if (!d->thumbnailData.isEmpty()) {
+#endif
+	if (!d->thumbnailData.isEmpty()) {
         offset += 86;
         stream << quint16(7);
         QExifValue xResolution = d->thumbnailXResolution.isNull()
@@ -1724,11 +1730,15 @@ qint64 QExifImageHeader::write(QIODevice *device) const
                         QExifValue(quint32(d->thumbnailData.size())), offset);
         writeExifValue(stream, xResolution);
         writeExifValue(stream, yResolution);
+#ifndef QT_NO_DEBUG
         Q_ASSERT(startPos + offset == device->pos());
+#endif
         device->write(d->thumbnailData);
         offset += d->thumbnailData.size();
     }
-    Q_ASSERT(startPos + offset == device->pos());
+#ifndef QT_NO_DEBUG
+	Q_ASSERT(startPos + offset == device->pos());
+#endif
     d->size = offset;
 #ifdef TEXIF
     exDevice->write(exif);