diff --git a/code/nel/tools/build_gamedata/configuration/scripts.py b/code/nel/tools/build_gamedata/configuration/scripts.py
index 080560ec2..d7122d3a3 100644
--- a/code/nel/tools/build_gamedata/configuration/scripts.py
+++ b/code/nel/tools/build_gamedata/configuration/scripts.py
@@ -82,6 +82,13 @@ def copyFileList(log, dir_source, dir_target, files):
 				if needUpdateLogRemoveDest(log, dir_source + "/" + fileName, dir_target + "/" + fileName):
 					shutil.copy(dir_source + "/" + fileName, dir_target + "/" + fileName)
 
+def copyFileListLogless(log, dir_source, dir_target, files):
+	for fileName in files:
+		if fileName != ".svn" and fileName != ".." and fileName != "." and fileName != "*.*":
+			if (os.path.isfile(dir_source + "/" + fileName)):
+				if needUpdateRemoveDest(log, dir_source + "/" + fileName, dir_target + "/" + fileName):
+					shutil.copy(dir_source + "/" + fileName, dir_target + "/" + fileName)
+
 def copyFileListNoTree(log, dir_source, dir_target, files):
 	for fileName in files:
 		if fileName != ".svn" and fileName != ".." and fileName != "." and fileName != "*.*":
@@ -145,6 +152,9 @@ def copyFilesRecursive(log, dir_source, dir_target):
 def copyFiles(log, dir_source, dir_target):
 	copyFileList(log, dir_source, dir_target, os.listdir(dir_source))
 
+def copyFilesLogless(log, dir_source, dir_target):
+	copyFileListLogless(log, dir_source, dir_target, os.listdir(dir_source))
+
 def copyFilesExt(log, dir_source, dir_target, file_ext):
 	files = os.listdir(dir_source)
 	len_file_ext = len(file_ext)
@@ -288,6 +298,31 @@ def findFile(log, dir_where, file_name):
 				printLog(log, "findFile: file not dir or file?! " + filePath)
 	return ""
 
+def needUpdateDirByLowercaseTagLog(log, dir_source, ext_source, dir_dest, ext_dest):
+	updateCount = 0
+	skipCount = 0
+	lenSrcExt = len(ext_source)
+	sourceFiles = findFilesNoSubdir(log, dir_source, ext_source)
+	destFiles = findFilesNoSubdir(log, dir_dest, ext_dest)
+	for file in sourceFiles:
+		sourceFile = dir_source + "/" + file
+		tagFile = dir_dest + "/" + file[0:-lenSrcExt].lower() + ext_dest
+		if os.path.isfile(tagFile):
+			sourceTime = os.stat(sourceFile).st_mtime
+			tagTime = os.stat(tagFile).st_mtime
+			if (sourceTime > tagTime):
+				updateCount = updateCount + 1
+			else:
+				skipCount = skipCount + 1
+		else:
+			updateCount = updateCount + 1
+	if updateCount > 0:
+		printLog(log, "UPDATE " + str(updateCount) + " / " + str(len(sourceFiles)) + "; SKIP " + str(skipCount) + " / " + str(len(sourceFiles)) + "; DEST " + str(len(destFiles)))
+		return 1
+	else:
+		printLog(log, "SKIP " + str(skipCount) + " / " + str(len(sourceFiles)) + "; DEST " + str(len(destFiles)))
+		return 0
+
 def needUpdateDirByTagLog(log, dir_source, ext_source, dir_dest, ext_dest):
 	updateCount = 0
 	skipCount = 0
@@ -327,6 +362,21 @@ def needUpdateDirNoSubdirFile(log, dir_source, file_dest):
 	else:
 		return 0
 
+def needUpdateFileDirNoSubdir(log, file_source, dir_dest):
+	if not os.path.isfile(file_source):
+		printLog(log, "WARNING MISSING " + file_source)
+		return 0
+	sourceTime = os.stat(file_source).st_mtime
+	destFiles = os.listdir(dir_dest)
+	for file in destFiles:
+		filePath = dir_dest + "/" + file
+		if os.path.isfile(filePath):
+			fileTime = os.stat(filePath).st_mtime
+			if sourceTime > fileTime:
+				return 1
+	else:
+		return 0
+
 def needUpdateDirNoSubdirMultiFile(log, dir_source, root_file, files_dest):
 	for file_dest in files_dest:
 		if needUpdateDirNoSubdirFile(log, dir_source, root_file + "/" + file_dest):
diff --git a/code/nel/tools/build_gamedata/processes/zone/2_build.py b/code/nel/tools/build_gamedata/processes/zone/2_build.py
index 1b1008da7..31ad7d6e0 100644
--- a/code/nel/tools/build_gamedata/processes/zone/2_build.py
+++ b/code/nel/tools/build_gamedata/processes/zone/2_build.py
@@ -59,23 +59,43 @@ if BuildQuality == 1:
 	else:
 		mkPath(log, ExportBuildDirectory + "/" + ZoneExportDirectory)
 		mkPath(log, ExportBuildDirectory + "/" + ZoneDependBuildDirectory)
-		mkPath(log, ActiveProjectDirectory + "/generated")
-		configFile = ActiveProjectDirectory + "/generated/zone_dependencies.cfg"
-		templateCf = open(ActiveProjectDirectory + "/generated/properties.cfg", "r")
-		cf = open(configFile, "w")
-		for line in templateCf:
-			cf.write(line)
-		cf.write("\n");
-		cf.write("level_design_directory = \"" + LeveldesignDirectory + "\";\n");
-		cf.write("level_design_world_directory = \"" + LeveldesignWorldDirectory + "\";\n");
-		cf.write("level_design_dfn_directory = \"" + LeveldesignDfnDirectory + "\";\n");
-		cf.write("continent_name = \"" + ContinentName + "\";\n");
-		cf.write("\n");
-		cf.close()
-		
-		for zoneRegion in ZoneRegions:
-			subprocess.call([ ExecTimeout, str(ZoneBuildDependTimeout), ZoneDependencies, configFile, ExportBuildDirectory + "/" + ZoneExportDirectory + "/" + zoneRegion[0] + ".zone", ExportBuildDirectory + "/" + ZoneExportDirectory + "/" + zoneRegion[1] + ".zone", ExportBuildDirectory + "/" + ZoneDependBuildDirectory + "/doomy.depend" ])
-		
+		needUpdateZoneDepend = needUpdateDirByLowercaseTagLog(log, ExportBuildDirectory + "/" + ZoneExportDirectory, ".zone", ExportBuildDirectory + "/" + ZoneDependBuildDirectory, ".depend")
+		if needUpdateZoneDepend:
+			printLog(log, "DETECT UPDATE Zone->Depend")
+		else:
+			printLog(log, "DETECT SKIP Zone->Depend")
+		needUpdateContinentDepend = needUpdateFileDirNoSubdir(log, LeveldesignWorldDirectory + "/" + ContinentFile, ExportBuildDirectory + "/" + ZoneDependBuildDirectory)
+		if needUpdateContinentDepend:
+			printLog(log, "DETECT UPDATE Continent->Depend")
+		else:
+			printLog(log, "DETECT SKIP Continent->Depend")
+		needUpdateSearchPaths = needUpdateMultiDirNoSubdir(log, ExportBuildDirectory, PropertiesExportBuildSearchPaths, ExportBuildDirectory + "/" + ZoneDependBuildDirectory)
+		if needUpdateSearchPaths:
+			printLog(log, "DETECT UPDATE SearchPaths->Depend")
+		else:
+			printLog(log, "DETECT SKIP SearchPaths->Depend")
+		if needUpdateZoneDepend or needUpdateContinentDepend or needUpdateSearchPaths:
+			printLog(log, "DETECT DECIDE UPDATE")
+			mkPath(log, ActiveProjectDirectory + "/generated")
+			configFile = ActiveProjectDirectory + "/generated/zone_dependencies.cfg"
+			templateCf = open(ActiveProjectDirectory + "/generated/properties.cfg", "r")
+			cf = open(configFile, "w")
+			for line in templateCf:
+				cf.write(line)
+			cf.write("\n");
+			cf.write("level_design_directory = \"" + LeveldesignDirectory + "\";\n");
+			cf.write("level_design_world_directory = \"" + LeveldesignWorldDirectory + "\";\n");
+			cf.write("level_design_dfn_directory = \"" + LeveldesignDfnDirectory + "\";\n");
+			cf.write("continent_name = \"" + ContinentName + "\";\n");
+			cf.write("\n");
+			cf.close()
+			
+			for zoneRegion in ZoneRegions:
+				# zone_dependencies [properties.cfg] [firstZone.zone] [lastzone.zone] [output_dependencies.cfg]
+				subprocess.call([ ExecTimeout, str(ZoneBuildDependTimeout), ZoneDependencies, configFile, ExportBuildDirectory + "/" + ZoneExportDirectory + "/" + zoneRegion[0] + ".zone", ExportBuildDirectory + "/" + ZoneExportDirectory + "/" + zoneRegion[1] + ".zone", ExportBuildDirectory + "/" + ZoneDependBuildDirectory + "/doomy.depend" ])
+		else:
+			printLog(log, "DETECT DECIDE SKIP")
+			printLog(log, "SKIP *")
 	printLog(log, "")
 
 # For each zone directory