diff --git a/code/nel/tools/3d/ig_elevation/main.cpp b/code/nel/tools/3d/ig_elevation/main.cpp
index 0d12d371b..3983dc4ec 100644
--- a/code/nel/tools/3d/ig_elevation/main.cpp
+++ b/code/nel/tools/3d/ig_elevation/main.cpp
@@ -35,7 +35,14 @@
 
 #include "nel/3d/scene_group.h"
 
-#include <windows.h>
+#ifdef NL_OS_WINDOWS
+	#include <windows.h>
+#else
+	#include <dirent.h> /* for directories functions */
+	#include <sys/types.h> 
+	#include <unistd.h> /* getcwd, chdir -- replacement for getCurDiretory & setCurDirectory on windows */
+#endif
+
 
 // ---------------------------------------------------------------------------
 
@@ -73,11 +80,11 @@ struct SExportOptions
 			return false;
 		else 
 			fclose (f);
-		
+
 		try
 		{			
 			CConfigFile cf;
-		
+
 			cf.load (sFilename);
 
 			// Out
@@ -126,6 +133,7 @@ struct CZoneLimits
 };
 
 // ---------------------------------------------------------------------------
+#ifdef NL_OS_WINDOWS  // win32 code 
 void dir (const string &sFilter, vector<string> &sAllFiles, bool bFullPath)
 {
 	WIN32_FIND_DATA findData;
@@ -133,7 +141,7 @@ void dir (const string &sFilter, vector<string> &sAllFiles, bool bFullPath)
 	char sCurDir[MAX_PATH];
 	sAllFiles.clear ();
 	GetCurrentDirectory (MAX_PATH, sCurDir);
-	hFind = FindFirstFile (sFilter.c_str(), &findData);	
+	hFind = FindFirstFile (("*"+sFilter).c_str(), &findData);
 	while (hFind != INVALID_HANDLE_VALUE)
 	{
 		DWORD res = GetFileAttributes(findData.cFileName);
@@ -150,6 +158,48 @@ void dir (const string &sFilter, vector<string> &sAllFiles, bool bFullPath)
 	FindClose (hFind);
 }
 
+void getcwd (char *dir, int length)
+{
+	GetCurrentDirectoryA (length, dir);
+}
+
+void chdir(const char *path)
+{
+	SetCurrentDirectoryA (path);
+}
+
+#else   // posix version  of the void dir(...) function.
+void dir (const string &sFilter, vector<string> &sAllFiles, bool bFullPath)
+{
+	char sCurDir[MAX_PATH];
+	DIR* dp = NULL;
+	struct dirent *dirp= NULL;
+
+	getcwd ( sCurDir, MAX_PATH ) ;
+	sAllFiles.clear ();
+	if ( (dp = opendir( sCurDir )) == NULL)
+	{
+		string sTmp = string("ERROR :  Can't open the dir : \"")+string(sCurDir)+string("\"") ;
+		outString ( sTmp ) ;
+		return ; 
+	}
+
+	while ( (dirp = readdir(dp)) != NULL)
+	{
+		std:string sFileName = std::string(dirp->d_name) ;
+		if (sFileName.substr((sFileName.length()-sFilter.length()),sFilter.length()).find(sFilter)!= std::string::npos )
+		{
+			if (bFullPath)
+				sAllFiles.push_back(string(sCurDir) + "/" + sFileName);
+			else
+				sAllFiles.push_back(sFileName);  
+		}
+
+	}
+	closedir(dp);
+}
+#endif
+
 
 // ---------------------------------------------------------------------------
 CZoneRegion *loadLand (const string &filename)
@@ -222,17 +272,19 @@ void SaveInstanceGroup (const char* sFilename, CInstanceGroup *pIG)
 		}
 		catch (const Exception &e)
 		{
-			outString(string(e.what()));
+			string stTmp = string(e.what()) ;
+			outString(  stTmp );
 		}
 	}
 	else
 	{
-		outString(string("Couldn't create ") + sFilename);
+		string stTemp = string("Couldn't create ") + string(sFilename) ;
+		outString( stTemp );
 	}
 }
 
 /** Get the Z of the height map at the given position
-  */
+ */
 static float  getHeightMapZ(float x, float y, const CZoneLimits &zl, const SExportOptions &options, CBitmap *heightMap1, CBitmap *heightMap2)
 {
 	float deltaZ = 0.0f, deltaZ2 = 0.0f;
@@ -274,8 +326,8 @@ int main(int nNbArg, char**ppArgs)
 
 	NL3D_BlockMemoryAssertOnPurge = false;
 	char sCurDir[MAX_PATH];
-	GetCurrentDirectory (MAX_PATH, sCurDir);
-	
+	getcwd (sCurDir, MAX_PATH);
+
 	if (nNbArg != 2)
 	{
 		printf ("Use : ig_elevation configfile.cfg\n");
@@ -322,7 +374,7 @@ int main(int nNbArg, char**ppArgs)
 
 	// Load the 2 height maps
 	CBitmap *HeightMap1 = NULL;
-	if (options.HeightMapFile1 != "")
+	if (!options.HeightMapFile1.empty())
 	{
 		HeightMap1 = new CBitmap;
 		try 
@@ -334,7 +386,9 @@ int main(int nNbArg, char**ppArgs)
 			}
 			else
 			{
-				outString(string("Couldn't not open " + options.HeightMapFile1 + " : heightmap 1 map ignored"));
+				string sTmp = string("Couldn't not open ")+string(options.HeightMapFile1)
+					+string(" : heightmap 1 map ignored");
+				outString(sTmp);
 				delete HeightMap1;
 				HeightMap1 = NULL;
 			}
@@ -348,7 +402,7 @@ int main(int nNbArg, char**ppArgs)
 		}
 	}
 	CBitmap *HeightMap2 = NULL;
-	if (options.HeightMapFile2 != "")
+	if (!options.HeightMapFile2.empty())
 	{
 		HeightMap2 = new CBitmap;
 		try 
@@ -360,7 +414,9 @@ int main(int nNbArg, char**ppArgs)
 			}
 			else
 			{
-				outString(string("Couldn't not open " + options.HeightMapFile2 + " : heightmap 2 map ignored\n"));
+				string sTmp = string("Couldn't not open ")+string(options.HeightMapFile2)
+					+string(" : heightmap 2 map ignored\n");
+				outString(sTmp);
 				delete HeightMap2;
 				HeightMap2 = NULL;
 			}
@@ -376,15 +432,15 @@ int main(int nNbArg, char**ppArgs)
 
 	// Get all files
 	vector<string> vAllFiles;
-	SetCurrentDirectory (options.InputIGDir.c_str());
-	dir ("*.ig", vAllFiles, false);
-	SetCurrentDirectory (sCurDir);
+	chdir (options.InputIGDir.c_str());
+	dir (".ig", vAllFiles, false);
+	chdir (sCurDir);
 
 	for (uint32 i = 0; i < vAllFiles.size(); ++i)
 	{
-		SetCurrentDirectory (options.InputIGDir.c_str());
+		chdir (options.InputIGDir.c_str());
 		CInstanceGroup *pIG = LoadInstanceGroup (vAllFiles[i].c_str());
-		SetCurrentDirectory (sCurDir);
+		chdir (sCurDir);
 		if (pIG != NULL)
 		{
 			bool realTimeSunContribution = pIG->getRealTimeSunContribution();
@@ -395,14 +451,12 @@ int main(int nNbArg, char**ppArgs)
 			vector<CPortal> Portals;
 			vector<CPointLightNamed> PLN;
 			pIG->retrieve (vGlobalPos, IA, Clusters, Portals, PLN);
-			
+
 			if (IA.empty() && PLN.empty() && Portals.empty() && Clusters.empty()) continue;
 
 
 			uint k;
 
-			
-
 			// elevate instance
 			for(k = 0; k < IA.size(); ++k)
 			{
@@ -416,7 +470,6 @@ int main(int nNbArg, char**ppArgs)
 				CVector lightPos = vGlobalPos + PLN[k].getPosition();
 				PLN[k].setPosition( PLN[k].getPosition() + getHeightMapZ(lightPos.x, lightPos.y, zl, options, HeightMap1, HeightMap2) * CVector::K);
 			}
-		
 
 			// portals
 			std::vector<CVector> portal;
@@ -459,12 +512,12 @@ int main(int nNbArg, char**ppArgs)
 			pIGout->enableRealTimeSunContribution(realTimeSunContribution);
 
 
-			SetCurrentDirectory (options.OutputIGDir.c_str());
+			chdir (options.OutputIGDir.c_str());
 			SaveInstanceGroup (vAllFiles[i].c_str(), pIGout);
-			SetCurrentDirectory (sCurDir);
+			chdir (sCurDir);
 			delete pIG;
 		}
 	}
 
 	return 1;
-}
\ No newline at end of file
+}