diff --git a/EXE_GdbCreateVol.cpp b/EXE_GdbCreateVol.cpp
index 66bb808..87a43c2 100644
--- a/EXE_GdbCreateVol.cpp
+++ b/EXE_GdbCreateVol.cpp
@@ -187,3 +187,57 @@ ExeCreateVolZmapFromSurfTm( int nParentId, int nStmId, double dPrec, bool bTriDe
   // restituisco l'identificativo della nuova entità
    return nNewId ;
 }
+
+//-------------------------------------------------------------------------------
+bool
+ExeUpdateVolZmapByAddingSurfTm( int nVolZmapId, int nStmId)
+{
+   IGeomDB* pGeomDB = GetCurrGeomDB() ;
+   VERIFY_GEOMDB( pGeomDB, GDB_ID_NULL)
+  // recupero lo Zmap
+   IVolZmap* pVZM = GetVolZmap( pGeomDB->GetGeoObj( nVolZmapId)) ;
+   bool bOk = ( pVZM != nullptr) ;
+  // recupero la trimesh
+   PtrOwner<ISurfTriMesh> pStm( CloneSurfTriMesh( pGeomDB->GetGeoObj( nStmId))) ;
+   bOk = bOk && !IsNull( pStm) ;
+  // recupero il frame dello Zmap e della Trimesh
+   Frame3d frZmap, frStm ;
+   bOk = bOk && pGeomDB->GetGlobFrame( nVolZmapId, frZmap) &&
+                pGeomDB->GetGlobFrame( nStmId, frStm) ;
+  // porto la Stm nel frame dello Zmap
+   bOk = bOk && pStm->LocToLoc( frStm, frZmap) ;
+  // aggiorno lo Zmap con la nuova superficie
+   bOk = bOk && pVZM->AddSurfTm( pStm) ;
+   ExeSetModified() ;
+  // se richiesto, salvo il comando Lua equivalente
+   if ( IsCmdLog()) {
+      string sLua = "EgtUpdateVolZmapByAddingSurfTm(" + ToString( nVolZmapId) + "," +
+                                                        ToString( nStmId) + ")"
+                    " -- bOk =" + ToString( bOk) ;
+      LOG_INFO( GetCmdLogger(), sLua.c_str()) ;
+   }
+   return bOk ;
+}
+
+//-------------------------------------------------------------------------------
+bool
+ExeUniformVolZmap( int nVolZmapId, double dToler)
+{
+   IGeomDB* pGeomDB = GetCurrGeomDB() ;
+   VERIFY_GEOMDB( pGeomDB, GDB_ID_NULL)
+  // recupero lo Zmap
+   IVolZmap* pVZM = GetVolZmap( pGeomDB->GetGeoObj( nVolZmapId)) ;
+   bool bOk = ( pVZM != nullptr) ;
+  // aggiorno lo Zmap
+   dToler = max( dToler, EPS_SMALL) ;
+   bOk = bOk && pVZM->MakeUniform( dToler) ;
+   ExeSetModified() ;
+  // se richiesto, salvo il comando Lua equivalente
+   if ( IsCmdLog()) {
+      string sLua = "EgtUniformZmap(" + ToString( nVolZmapId) + "," +
+                                        ToString( dToler) + ")"
+                    " -- bOk =" + ToString( bOk) ;
+      LOG_INFO( GetCmdLogger(), sLua.c_str()) ;
+   }
+   return bOk ;
+}
diff --git a/LUA_GdbCreateVol.cpp b/LUA_GdbCreateVol.cpp
index f5ec104..a9c2aef 100644
--- a/LUA_GdbCreateVol.cpp
+++ b/LUA_GdbCreateVol.cpp
@@ -140,6 +140,37 @@ LuaCreateVolZmapFromSurfTm( lua_State* L)
    return 1 ;
 }
 
+//-------------------------------------------------------------------------------
+static int
+LuaUpdateVolZmapByAddingSurfTm( lua_State* L)
+{
+  // 2 parametri : nVolZmapId, StmId,
+   int nVolZmapId ;
+   LuaCheckParam( L, 1, nVolZmapId) ;
+   int nStmId ;
+   LuaCheckParam( L, 2, nStmId) ;
+   LuaClearStack( L) ;
+   bool bOk = ExeUpdateVolZmapByAddingSurfTm( nVolZmapId, nStmId) ;
+   LuaSetParam( L, bOk) ;
+   return 1 ;
+}
+
+//-------------------------------------------------------------------------------
+static int
+LuaUniformVolZmap( lua_State* L)
+{
+  // 1 o 2 parametri : nVolZmapId [, dToler]
+   int nVolZmapId ;
+   LuaCheckParam( L, 1, nVolZmapId) ;
+   double dToler = EPS_SMALL ;
+   LuaGetParam( L, 2, dToler) ;
+   LuaClearStack( L) ;
+   bool bOk = ExeUniformVolZmap( nVolZmapId, dToler) ;
+   LuaSetParam( L, bOk) ;
+   return 1 ;
+}
+
+
 //-------------------------------------------------------------------------------
 bool
 LuaInstallGdbCreateVol( LuaMgr& luaMgr)
@@ -149,5 +180,7 @@ LuaInstallGdbCreateVol( LuaMgr& luaMgr)
    bOk = bOk && luaMgr.RegisterFunction( "EgtVolZmapEmpty", LuaCreateVolZmapEmpty) ;
    bOk = bOk && luaMgr.RegisterFunction( "EgtVolZmapByRegionExtrusion", LuaCreateVolZmapByRegionExtrusion) ;
    bOk = bOk && luaMgr.RegisterFunction( "EgtVolZmapFromSurfTm", LuaCreateVolZmapFromSurfTm) ;
+   bOk = bOk && luaMgr.RegisterFunction( "EgtUpdateVolZmapByAddingSurfTm", LuaUpdateVolZmapByAddingSurfTm ) ;
+   bOk = bOk && luaMgr.RegisterFunction( "EgtUniformZmap", LuaUniformVolZmap) ;
    return bOk ;
 }