diff --git a/Makefile b/Makefile
index 3640908..d4bf6ac 100644
--- a/Makefile
+++ b/Makefile
@@ -18,6 +18,9 @@ export SBSARFILES = $(SBSARDESTINATION:.sbs=.sbsar)
 # texturesets files
 export TEXTURESET_FOLDER := texturesets
 
+# texture names possible
+export TEXTURES_NAMES := basecolor|normal|metallic|roughness|opacity|height
+
 # png files folders
 export PNG1024_DIR := png_1024
 export PNG512_DIR := png_512
@@ -25,7 +28,7 @@ export PNG256_DIR := png_256
 
 # Blender related
 export BLENDFILES_FOLDER := blenderfiles/master
-export BLENDEREXEC := /home/yann/Documents/3D/blender_builds/daily/blender-3.1.0-alpha+daily.c1f5d8d023c6/blender
+export BLENDEREXEC := /home/yann/Documents/3D/blender_builds/daily/blender-3.1.0-alpha+daily.644eb68524b9/blender
 
 # Logo file
 export LOGO := logo/YKtextures.png
diff --git a/Makefile_previews b/Makefile_previews
index c0a8e5d..47090c9 100644
--- a/Makefile_previews
+++ b/Makefile_previews
@@ -19,7 +19,7 @@ $(RENDERS): $(TEXTURESET_FOLDER)/%
 	echo "pngset :" $$pngset ;\
 	for file in $$pngset ;\
 	do basename=$$(basename "$$file");\
-	newname=$$(echo $$basename | sed -r 's/.*_[0-9]{2}_(.*)/\\\1/' | sed -r 's/\\//');\
+	newname=$$(echo $$basename | sed -r 's/.*($(TEXTURES_NAMES))/\\\1/' | sed -r 's/\\//');\
 	mkdir --parents blenderfiles/textures;\
 	echo "Copying "$$file ;\
 	cp $$file blenderfiles/textures/$$newname ; done ;\
@@ -44,3 +44,5 @@ $(RENDERS): $(TEXTURESET_FOLDER)/%
 	done
 # Clean the subfolder with temp textures
 	@ rm -Rf blenderfiles/textures
+# Clean the temp render folder
+	@ rm -Rf render
diff --git a/README.md b/README.md
index dacdd30..152cdd0 100644
--- a/README.md
+++ b/README.md
@@ -26,6 +26,10 @@ You must write down also the place where the script will write the generated sbs
 
 You can leave the folder indicated here, as it will be used only internally by the script to check the texturesets it handles.
 
+# Texture names possible
+
+This variable is needed to recognize the files created as bitmaps from the substance source, it must include all the identifiers used in all the graphs, separated by a pipe and no space. It is used as regexp rule in the script.
+
 ## Png files folders
 
 Theses are the places where the script will generate the final png files. It will be the main repository used as reference to fill hereafter all the targets needed in any package needed.