diff --git a/code/nel/include/nel/3d/texture_bump.h b/code/nel/include/nel/3d/texture_bump.h
index 1fb6152de..1c1f2a245 100644
--- a/code/nel/include/nel/3d/texture_bump.h
+++ b/code/nel/include/nel/3d/texture_bump.h
@@ -84,14 +84,6 @@ protected:
 	float						 *_NormalizationFactor;
 	bool						 _DisableSharing;
 	bool						 _ForceNormalize;
-	// Map that give the normalization factor for each map from its sharename. This avoid to generate several time the maps to get the normalization factor if a bumpmap is shared by severals CTextureBump instances;
-	struct CNormalizationInfo
-	{
-		uint  NumRefs;
-		float NormalizationFactor;
-	};
-	typedef std::map<std::string, CNormalizationInfo> TNameToNI; // sharename to the normalization factor
-	static TNameToNI	_NameToNF; // name to normalization factor
 private:
 	/// we don't allow for mipmap for bump so we redefine this to prevent the user from doing this on the base class Itexture
 	virtual         void setFilterMode(TMagFilter magf, TMinFilter minf);
diff --git a/code/nel/src/3d/texture_bump.cpp b/code/nel/src/3d/texture_bump.cpp
index 3707476b2..7705a58fa 100644
--- a/code/nel/src/3d/texture_bump.cpp
+++ b/code/nel/src/3d/texture_bump.cpp
@@ -26,9 +26,31 @@
 
 namespace NL3D {
 
+namespace /* anonymous */ {
 
-CTextureBump::TNameToNI CTextureBump::_NameToNF;
+// Map that give the normalization factor for each map from its sharename. This avoid to generate several time the maps to get the normalization factor if a bumpmap is shared by severals CTextureBump instances;
+struct CNormalizationInfo
+{
+	uint  NumRefs;
+	float NormalizationFactor;
+};
+typedef std::map<std::string, CNormalizationInfo> TNameToNI; // sharename to the normalization factor
+class CNameToNFStatic {
+public:
+	TNameToNI Map;
+	bool Initialized;
+	CNameToNFStatic() : Initialized(true)
+	{
+		
+	}
+	~CNameToNFStatic()
+	{
+		Initialized = false;
+	}
+};
+CNameToNFStatic s_NameToNF;
 
+} /* anonymous namespace */
 
 #define GET_HGT(x, y) ((sint) ((src[(uint) (x) % width + ((uint) (y) % height) * width] & 0x00ff00) >> 8))
 /// create a DsDt texture from a height map (red component of a rgba bitmap)
@@ -242,14 +264,15 @@ void CTextureBump::doGenerate(bool async)
 	}
 	// create entry in the map for the normalization factor
 	std::string shareName = getShareName();
-	TNameToNI::iterator it = _NameToNF.find(shareName);
-	if (it == _NameToNF.end())
+	nlassertverbose(s_NameToNF.Initialized);
+	TNameToNI::iterator it = s_NameToNF.Map.find(shareName);
+	if (it == s_NameToNF.Map.end())
 	{
 		// create a new entry
 		CNormalizationInfo ni;
 		ni.NumRefs = 1;
 		ni.NormalizationFactor = normalizationFactor;
-		std::pair<TNameToNI::iterator, bool> pb = _NameToNF.insert(TNameToNI::value_type(shareName, ni));
+		std::pair<TNameToNI::iterator, bool> pb = s_NameToNF.Map.insert(TNameToNI::value_type(shareName, ni));
 		_NormalizationFactor = &(pb.first->second.NormalizationFactor);
 	}
 	else
@@ -303,8 +326,9 @@ float CTextureBump::getNormalizationFactor()
 	if (!_HeightMap) return 1.f;
 	// not computed yet, see if another map has computed it
 	std::string shareName = getShareName();
-	TNameToNI::iterator it = _NameToNF.find(shareName);
-	if (it != _NameToNF.end())
+	nlassertverbose(s_NameToNF.Initialized);
+	TNameToNI::iterator it = s_NameToNF.Map.find(shareName);
+	if (it != s_NameToNF.Map.end())
 	{
 		_NormalizationFactor = &(it->second.NormalizationFactor);
 		++(it->second.NumRefs);
@@ -320,16 +344,16 @@ float CTextureBump::getNormalizationFactor()
 ///==============================================================================================
 CTextureBump::~CTextureBump()
 {
-	if (_NormalizationFactor && !_NameToNF.empty())
+	if (s_NameToNF.Initialized && _NormalizationFactor && !s_NameToNF.Map.empty())
 	{
 		// find normalization factor from its name
-		TNameToNI::iterator it = _NameToNF.find(getShareName());
+		TNameToNI::iterator it = s_NameToNF.Map.find(getShareName());
 
 		// if found
-		if (it != _NameToNF.end())
+		if (it != s_NameToNF.Map.end())
 		{
 			// we can delete it only if it's not used anymore
-			if (--(it->second.NumRefs) == 0) _NameToNF.erase(it);
+			if (--(it->second.NumRefs) == 0) s_NameToNF.Map.erase(it);
 		}
 	}
 }