diff --git a/core/src/fr/evolving/automata/Negativer_II.java b/core/src/fr/evolving/automata/Negativer_II.java
index 6c6c461..dcab9c3 100644
--- a/core/src/fr/evolving/automata/Negativer_II.java
+++ b/core/src/fr/evolving/automata/Negativer_II.java
@@ -69,7 +69,7 @@ public class Negativer_II extends Transmuter {
 		this.ActivationLevel=0;
 		this.Tilestype= new OrderedMap<Vector2, CaseType>();
 		this.Tilestype.put(new Vector2(0,0), CaseType.Cuivre);
-		this.Tilestype.put(new Vector2(1,0), CaseType.Fibre);
+		this.Tilestype.put(new Vector2(1,0), CaseType.Fibre_seul);
 		this.Tilesid= new OrderedMap<Vector2, Integer>();
 		this.Tilesid.put(new Vector2(0,0), 109);
 		this.Tilesid.put(new Vector2(1,0), 107);	
diff --git a/core/src/fr/evolving/automata/Positiver_II.java b/core/src/fr/evolving/automata/Positiver_II.java
index f4580c8..7c0ccdb 100644
--- a/core/src/fr/evolving/automata/Positiver_II.java
+++ b/core/src/fr/evolving/automata/Positiver_II.java
@@ -69,7 +69,7 @@ public class Positiver_II extends Transmuter {
 		this.ActivationLevel=0;
 		this.Tilestype= new OrderedMap<Vector2, CaseType>();
 		this.Tilestype.put(new Vector2(0,0), CaseType.Cuivre);
-		this.Tilestype.put(new Vector2(1,0), CaseType.Fibre);
+		this.Tilestype.put(new Vector2(1,0), CaseType.Fibre_seul);
 		this.Tilesid= new OrderedMap<Vector2, Integer>();
 		this.Tilesid.put(new Vector2(0,0), 106);
 		this.Tilesid.put(new Vector2(1,0), 107);		
diff --git a/core/src/fr/evolving/screens/GameScreen.java b/core/src/fr/evolving/screens/GameScreen.java
index 7d0f743..d54d5af 100644
--- a/core/src/fr/evolving/screens/GameScreen.java
+++ b/core/src/fr/evolving/screens/GameScreen.java
@@ -475,7 +475,8 @@ public class GameScreen implements Screen {
 	}
 
 	void map_fiber_pen(float realx, float realy,int x, int y,boolean alone,int button,calling call) {
-		level.Grid.GetXY(x,y).Fiber=-1*level.Grid.GetXY(x,y).Fiber+1;
+		if (level.Grid.GetXY(x,y).Transmuter_calc==0)
+			level.Grid.GetXY(x,y).Fiber=-1*level.Grid.GetXY(x,y).Fiber+1;
 		if (alone) {
 			level.Grid.tiling_copper();
 			map.redraw(60);
@@ -483,7 +484,8 @@ public class GameScreen implements Screen {
 	}
 
 	void map_fiber_brush(float realx, float realy,int x, int y,boolean alone,int button,calling call) {
-		level.Grid.GetXY(x,y).Fiber=1;
+		if (level.Grid.GetXY(x,y).Transmuter_calc==0)
+			level.Grid.GetXY(x,y).Fiber=1;
 		if (alone) {
 			level.Grid.tiling_copper();
 			map.redraw(60);
@@ -501,7 +503,8 @@ public class GameScreen implements Screen {
 	}
 
 	void map_copper_pen(float realx, float realy,int x, int y,boolean alone,int button,calling call) {
-		level.Grid.GetXY(x,y).Copper=!level.Grid.GetXY(x,y).Copper;
+		if (level.Grid.GetXY(x,y).Transmuter_calc==0)
+			level.Grid.GetXY(x,y).Copper=!level.Grid.GetXY(x,y).Copper;
 		if (alone) {
 			level.Grid.tiling_copper();
 			map.redraw(60);
@@ -509,7 +512,8 @@ public class GameScreen implements Screen {
 	}
 
 	void map_copper_brush(float realx, float realy,int x, int y,boolean alone,int button,calling call) {
-		level.Grid.GetXY(x,y).Copper=true;
+		if (level.Grid.GetXY(x,y).Transmuter_calc==0)
+			level.Grid.GetXY(x,y).Copper=true;
 		if (alone) {
 			level.Grid.tiling_copper();
 			map.redraw(60);