diff --git a/code/nel/tools/build_gamedata/configuration/scripts.py b/code/nel/tools/build_gamedata/configuration/scripts.py
index 062756860..080560ec2 100644
--- a/code/nel/tools/build_gamedata/configuration/scripts.py
+++ b/code/nel/tools/build_gamedata/configuration/scripts.py
@@ -327,15 +327,60 @@ def needUpdateDirNoSubdirFile(log, dir_source, file_dest):
 	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):
+			return 1
+	return 0
+
+def needUpdateDirNoSubdirMultiFileExt(log, dir_source, root_file, files_dest, file_ext):
+	for file_dest in files_dest:
+		if needUpdateDirNoSubdirFile(log, dir_source, root_file + "/" + file_dest + file_ext):
+			return 1
+	return 0
+
 def needUpdateMultiDirNoSubdirFile(log, root_dir, dirs_source, file_dest):
 	for dir_source in dirs_source:
 		if needUpdateDirNoSubdirFile(log, root_dir + "/" + dir_source, file_dest):
 			return 1
 	return 0
 
+def needUpdateMultiDirNoSubdirMultiFileExt(log, root_dir, dirs_source, root_file, files_dest, file_ext):
+	for file_dest in files_dest:
+		if needUpdateMultiDirNoSubdirFile(log, root_dir, dirs_source, root_file + "/" + file_dest + file_ext):
+			return 1
+	return 0
+
+def needUpdateMultiDirNoSubdir(log, root_dir, dirs_source, dir_dest):
+	for dir_source in dirs_source:
+		if needUpdateDirNoSubdir(log, root_dir + "/" + dir_source, dir_dest):
+			return 1
+	return 0
+
+def needUpdateDirNoSubdirExtFile(log, dir_source, dir_ext, file_dest):
+	if not os.path.isfile(file_dest):
+		return 1
+	destTime = os.stat(file_dest).st_mtime
+	sourceFiles = os.listdir(dir_source)
+	for file in sourceFiles:
+		if file.endswith(dir_ext):
+			filePath = dir_source + "/" + file
+			if os.path.isfile(filePath):
+				fileTime = os.stat(filePath).st_mtime
+				if fileTime > destTime:
+					return 1
+	else:
+		return 0
+
+def needUpdateDirNoSubdirExtMultiFileExt(log, dir_source, dir_ext, root_file, files_dest, file_ext):
+	for file_dest in files_dest:
+		if needUpdateDirNoSubdirExtFile(log, dir_source, dir_ext, root_file + "/" + file_dest + file_ext):
+			return 1
+	return 0
+
 def needUpdateDirNoSubdir(log, dir_source, dir_dest):
 	latestSourceFile = 0
-	latestDestFile = 0
+	oldestDestFile = 0
 	sourceFiles = os.listdir(dir_source)
 	destFiles = os.listdir(dir_dest)
 	for file in sourceFiles:
@@ -348,9 +393,9 @@ def needUpdateDirNoSubdir(log, dir_source, dir_dest):
 		filePath = dir_dest + "/" + file
 		if os.path.isfile(filePath):
 			fileTime = os.stat(filePath).st_mtime
-			if (fileTime > latestDestFile):
-				latestDestFile = fileTime
-	if latestSourceFile > latestDestFile:
+			if oldestDestFile == 0 or fileTime < oldestDestFile:
+				oldestDestFile = fileTime
+	if latestSourceFile > oldestDestFile:
 		return 1
 	else:
 		return 0
diff --git a/code/nel/tools/build_gamedata/processes/shape/2_build.py b/code/nel/tools/build_gamedata/processes/shape/2_build.py
index ff5a86a85..5f8881d42 100644
--- a/code/nel/tools/build_gamedata/processes/shape/2_build.py
+++ b/code/nel/tools/build_gamedata/processes/shape/2_build.py
@@ -120,39 +120,65 @@ if len(CoarseMeshTextureNames) > 0:
 	mkPath(log, shapeWithCoarseMesh)
 	shapeWithCoarseMeshBuilded = ExportBuildDirectory + "/" + ShapeWithCoarseMeshBuildDirectory
 	mkPath(log, shapeWithCoarseMeshBuilded)
-	cf = open("config_generated.cfg", "w")
-	cf.write("texture_mul_size = " + TextureMulSizeValue + ";\n")
-	cf.write("\n")
-	cf.write("search_path = \n")
-	cf.write("{\n")
-	cf.write("\t\"" + shapeWithCoarseMesh + "\", \n")
-	for dir in MapLookupDirectories:
-		cf.write("\t\"" + ExportBuildDirectory + "/" + dir + "\", \n")
-	cf.write("};\n")
-	cf.write("\n")
-	cf.write("list_mesh = \n")
-	cf.write("{\n")
-	# For each shape with coarse mesh
-	files = findFiles(log, shapeWithCoarseMesh, "", ".shape")
-	for file in files:
-		sourceFile = shapeWithCoarseMesh + "/" + file
-		if os.path.isfile(sourceFile):
-			destFile = shapeWithCoarseMeshBuilded + "/" + file
-			cf.write("\t\"" + file + "\", \"" + destFile + "\", \n")
-	cf.write("};\n")
-	cf.write("\n")
-	cf.write("output_textures = \n")
-	cf.write("{\n")
-	# For each shape with coarse mesh
-	for tn in CoarseMeshTextureNames:
-		cf.write("\t\"" + shapeWithCoarseMesh + "/" + tn + ".tga\", \n")
-	cf.write("};\n")
-	cf.close()
-	subprocess.call([ BuildCoarseMesh, "config_generated.cfg" ])
-	os.remove("config_generated.cfg")
+	# This builds from shapeWithCoarseMesh .shape to shapeWithCoarseMesh .tga
+	# And from shapeWithCoarseMesh .shape to shapeWithCoarseMeshBuilded .shape
+	# Then builds from shapeWithCoarseMesh .tga to shapeWithCoarseMeshBuilded .tga
+	# Depends on MapLookupDirectories
+	needUpdateMaps = needUpdateMultiDirNoSubdirMultiFileExt(log, ExportBuildDirectory, MapLookupDirectories, shapeWithCoarseMesh, CoarseMeshTextureNames, ".tga") or needUpdateMultiDirNoSubdir(log, ExportBuildDirectory, MapLookupDirectories, shapeWithCoarseMeshBuilded)
+	if needUpdateMaps:
+		printLog(log, "DETECT UPDATE Maps->*")
+	else:
+		printLog(log, "DETECT SKIP Maps->*")
+	needUpdateShapeShape = needUpdateDirByTagLog(log, shapeWithCoarseMesh, ".shape", shapeWithCoarseMeshBuilded, ".shape")
+	if needUpdateShapeShape:
+		printLog(log, "DETECT UPDATE Shape->Shape")
+	else:
+		printLog(log, "DETECT SKIP Shape->Shape")
+	needUpdateShapeCoarse = needUpdateDirNoSubdirExtMultiFileExt(log, shapeWithCoarseMesh, ".shape", shapeWithCoarseMesh, CoarseMeshTextureNames, ".tga")
+	if needUpdateShapeCoarse:
+		printLog(log, "DETECT UPDATE Shape->Coarse")
+	else:
+		printLog(log, "DETECT SKIP Shape->Coarse")
+	if needUpdateMaps or needUpdateShapeShape or needUpdateShapeCoarse:
+		cf = open("config_generated.cfg", "w")
+		cf.write("texture_mul_size = " + TextureMulSizeValue + ";\n")
+		cf.write("\n")
+		cf.write("search_path = \n")
+		cf.write("{\n")
+		cf.write("\t\"" + shapeWithCoarseMesh + "\", \n")
+		for dir in MapLookupDirectories:
+			cf.write("\t\"" + ExportBuildDirectory + "/" + dir + "\", \n")
+		cf.write("};\n")
+		cf.write("\n")
+		cf.write("list_mesh = \n")
+		cf.write("{\n")
+		# For each shape with coarse mesh
+		files = findFiles(log, shapeWithCoarseMesh, "", ".shape")
+		for file in files:
+			sourceFile = shapeWithCoarseMesh + "/" + file
+			if os.path.isfile(sourceFile):
+				destFile = shapeWithCoarseMeshBuilded + "/" + file
+				cf.write("\t\"" + file + "\", \"" + destFile + "\", \n")
+		cf.write("};\n")
+		cf.write("\n")
+		cf.write("output_textures = \n")
+		cf.write("{\n")
+		# For each shape with coarse mesh
+		for tn in CoarseMeshTextureNames:
+			cf.write("\t\"" + shapeWithCoarseMesh + "/" + tn + ".tga\", \n")
+		cf.write("};\n")
+		cf.close()
+		subprocess.call([ BuildCoarseMesh, "config_generated.cfg" ])
+		os.remove("config_generated.cfg")
+	needUpdateCoarse = needUpdateDirNoSubdirExtMultiFileExt(log, shapeWithCoarseMesh, ".tga", shapeWithCoarseMeshBuilded, CoarseMeshTextureNames, ".dds")
+	if needUpdateCoarse:
+		printLog(log, "DETECT UPDATE Coarse->DDS")
+	else:
+		printLog(log, "DETECT SKIP Coarse->DDS")
 	# Convert the coarse texture to dds
-	for tn in CoarseMeshTextureNames:
-		subprocess.call([ TgaToDds, shapeWithCoarseMesh + "/" + tn + ".tga", "-o", shapeWithCoarseMeshBuilded + "/" + tn + ".dds", "-a", "5" ])
+	if needUpdateCoarse:
+		for tn in CoarseMeshTextureNames:
+			subprocess.call([ TgaToDds, shapeWithCoarseMesh + "/" + tn + ".tga", "-o", shapeWithCoarseMeshBuilded + "/" + tn + ".dds", "-a", "5" ])
 else:
 	printLog(log, ">>> No coarse meshes <<<")