diff --git a/EXE_GdbModifySurf.cpp b/EXE_GdbModifySurf.cpp
index a6b3269..f6df9d2 100644
--- a/EXE_GdbModifySurf.cpp
+++ b/EXE_GdbModifySurf.cpp
@@ -1074,6 +1074,45 @@ ExeSurfTmSubtractProjectedFacesOnFace( int nSurfId, int nFaceInd, int nDestGrpId
    return bOk ;
 }
 
+//----------------------------------------------------------------------------
+bool
+ExeSurfTmSetFaceColor( int nId, int nFacet, int nColor)
+{
+   IGeomDB* pGeomDB = GetCurrGeomDB() ;
+   VERIFY_GEOMDB( pGeomDB, false)
+  // recupero la superficie TriMesh
+   ISurfTriMesh* pStm = GetSurfTriMesh( pGeomDB->GetGeoObj( nId)) ;
+   bool bOk = ( pStm != nullptr) ;
+  // recupero tutti i triangoli della faccia e imposto il flag opportuno per il colore
+   INTVECTOR vTria ;
+   bOk = bOk && pStm->GetAllTriaInFacet( nFacet, vTria) ;
+   for ( const auto nT : vTria)
+      pStm->SetTFlag( nT, nColor) ;
+   ExeSetModified() ;
+  // se richiesto, salvo il comando Lua equivalente
+   if ( IsCmdLog()) {
+      string sLua = "EgtSurfTmSetFaceColor(" + ToString( nId) + "," +
+                                               ToString( nFacet) + "," +
+                                               ToString( nColor) + ")" +
+                    " -- Ok=" + ToString( bOk) ;
+      LOG_INFO( GetCmdLogger(), sLua.c_str()) ;
+   }
+   return bOk ;
+}
+
+//----------------------------------------------------------------------------
+bool
+ExeSurfTmGetTriaColor( int nId, int nTria, int& nColor)
+{
+   IGeomDB* pGeomDB = GetCurrGeomDB() ;
+   VERIFY_GEOMDB( pGeomDB, false)
+  // recupero la superficie TriMesh
+   ISurfTriMesh* pStm = GetSurfTriMesh( pGeomDB->GetGeoObj( nId)) ;
+   bool bOk = ( pStm != nullptr) ;
+  // recupero il colore del triangolo
+   return ( bOk && pStm->GetTFlag( nTria, nColor)) ;
+}
+
 //----------------------------------------------------------------------------
 bool
 ExeSurfTmResetTwoColors( int nId)
@@ -1118,6 +1157,20 @@ ExeSurfTmSetShowEdges( int nId, bool bShow)
    return bOk ;
 }
 
+//----------------------------------------------------------------------------
+bool
+ExeSurfTmGetShowEdges( int nId, bool& bShow)
+{
+   IGeomDB* pGeomDB = GetCurrGeomDB() ;
+   VERIFY_GEOMDB( pGeomDB, false)
+  // recupero la superficie trimesh
+   ISurfTriMesh* pStm = GetSurfTriMesh( pGeomDB->GetGeoObj( nId)) ;
+   bool bOk = ( pStm != nullptr) ;
+  // recupero lo stato di visualizzazione degli spigoli vivi
+   bShow = ( bOk && pStm->GetShowEdges()) ;
+   return bOk ;
+}
+
 //----------------------------------------------------------------------------
 static bool 
 MySurfBzTrim( int nId, int nTrimmerId)
diff --git a/LUA_GdbModifySurf.cpp b/LUA_GdbModifySurf.cpp
index da4bedd..58e046d 100644
--- a/LUA_GdbModifySurf.cpp
+++ b/LUA_GdbModifySurf.cpp
@@ -479,6 +479,44 @@ LuaSurfTmSubtractProjectedFacesOnFace( lua_State* L)
    return 4 ;
 }
 
+//-------------------------------------------------------------------------------
+static int
+LuaSurfTmSetFaceColor( lua_State* L)
+{
+  // 3 parametri : Id, nFacet, nColor
+   int nId ;
+   LuaCheckParam( L, 1, nId)
+   int nFacet ;
+   LuaCheckParam( L, 2, nFacet)
+   int nColor ;
+   LuaCheckParam( L, 3, nColor)
+   LuaClearStack( L) ;
+  // imposto il colore alla faccia della superficie TM
+   bool bOk = ExeSurfTmSetFaceColor( nId, nFacet, nColor) ;
+   LuaSetParam( L, bOk) ;
+   return 1 ;
+}
+
+//-------------------------------------------------------------------------------
+static int
+LuaSurfTmGetTriaColor( lua_State* L)
+{
+  // 2 parametri : Id, nTria
+   int nId ;
+   LuaCheckParam( L, 1, nId)
+   int nTria ;
+   LuaCheckParam( L, 2, nTria)
+   LuaClearStack( L) ;
+  // recupero il flag di colore del triangolo della superficie TM
+   int nColor ;
+   bool bOk = ExeSurfTmGetTriaColor( nId, nTria, nColor) ;
+   if ( bOk)
+      LuaSetParam( L, nColor) ;
+   else
+      LuaSetParam( L) ;
+   return 1 ;
+}
+
 //-------------------------------------------------------------------------------
 static int
 LuaSurfTmResetTwoColors( lua_State* L)
@@ -510,6 +548,24 @@ LuaSurfTmSetShowEdges( lua_State* L)
    return 1 ;
 }
 
+//-------------------------------------------------------------------------------
+static int
+LuaSurfTmGetShowEdges( lua_State* L)
+{
+  // 1 parametro : Id
+   int nId ;
+   LuaCheckParam( L, 1, nId)
+   LuaClearStack( L) ;
+  // recupero il flag di visualizzazione degli spigoli vivi della superficie TM
+   bool bShow ;
+   bool bOk = ExeSurfTmGetShowEdges( nId, bShow) ;
+   if ( bOk)
+      LuaSetParam( L, bShow) ;
+   else
+      LuaSetParam( L) ;
+   return 1 ;
+}
+
 //-------------------------------------------------------------------------------
 static int
 LuaSurfBzTrim( lua_State* L)
@@ -554,8 +610,11 @@ LuaInstallGdbModifySurf( LuaMgr& luaMgr)
    bOk = bOk && luaMgr.RegisterFunction( "EgtSurfTmSplit", LuaSurfTmSplit) ;
    bOk = bOk && luaMgr.RegisterFunction( "EgtSurfTmCut", LuaSurfTmCut) ;
    bOk = bOk && luaMgr.RegisterFunction( "EgtSurfTmSubtractProjectedFacesOnFace", LuaSurfTmSubtractProjectedFacesOnFace) ;
+   bOk = bOk && luaMgr.RegisterFunction( "EgtSurfTmSetFaceColor", LuaSurfTmSetFaceColor) ;
+   bOk = bOk && luaMgr.RegisterFunction( "EgtSurfTmGetTriaColor", LuaSurfTmGetTriaColor) ;
    bOk = bOk && luaMgr.RegisterFunction( "EgtSurfTmResetTwoColors", LuaSurfTmResetTwoColors) ;
    bOk = bOk && luaMgr.RegisterFunction( "EgtSurfTmSetShowEdges", LuaSurfTmSetShowEdges) ;
+   bOk = bOk && luaMgr.RegisterFunction( "EgtSurfTmGetShowEdges", LuaSurfTmGetShowEdges) ;
    bOk = bOk && luaMgr.RegisterFunction( "EgtSurfBzTrim", LuaSurfBzTrim) ;
    return bOk ;
 }