diff --git a/EXE_GdbModifySurf.cpp b/EXE_GdbModifySurf.cpp
index 2188141..d52d8ab 100644
--- a/EXE_GdbModifySurf.cpp
+++ b/EXE_GdbModifySurf.cpp
@@ -367,6 +367,29 @@ ExeSurfFrRotateSimpleNoCollision( int nId1, int nId2, const Point3d& ptCen, doub
    return ( bOk && CAvSimpleSurfFrMove( *pSfr1, *pSfr2L).Rotate(ptCenL, dAngDeg)) ;
 }
 
+//-------------------------------------------------------------------------------
+bool
+ExeSurfTmRemoveFacet( int nId, int nFacet)
+{
+   IGeomDB* pGeomDB = GetCurrGeomDB() ;
+   VERIFY_GEOMDB( pGeomDB, false)
+  // recupero la superficie TriMesh
+   ISurfTriMesh* pStm = GetSurfTriMesh( pGeomDB->GetGeoObj( nId)) ;
+   bool bOk = ( pStm != nullptr) ;
+  // eseguo la rimozione
+   bOk = bOk && pStm->RemoveFacet( nFacet) ;
+   ExeSetModified() ;
+  // se richiesto, salvo il comando Lua equivalente
+   if ( IsCmdLog()) {
+      string sLua = "EgtSurfTmRemoveFacet(" + ToString( nId) + "," +
+                                              ToString( nFacet) + ")" +
+                    " -- Ok=" + ToString( bOk) ;
+      LOG_INFO( GetCmdLogger(), sLua.c_str()) ;
+   }
+  // restituisco risultato
+   return bOk ;
+}
+ 
 //-------------------------------------------------------------------------------
 bool
 ExeSurfTmSwapFacets( int nId, int nFacet1, int nFacet2)
@@ -391,6 +414,29 @@ ExeSurfTmSwapFacets( int nId, int nFacet1, int nFacet2)
    return bOk ;
 }
 
+//-------------------------------------------------------------------------------
+bool
+ExeSurfTmRemovePart( int nId, int nPart)
+{
+   IGeomDB* pGeomDB = GetCurrGeomDB() ;
+   VERIFY_GEOMDB( pGeomDB, false)
+  // recupero la superficie TriMesh
+   ISurfTriMesh* pStm = GetSurfTriMesh( pGeomDB->GetGeoObj( nId)) ;
+   bool bOk = ( pStm != nullptr) ;
+  // eseguo la rimozione
+   bOk = bOk && pStm->RemovePart( nPart) ;
+   ExeSetModified() ;
+  // se richiesto, salvo il comando Lua equivalente
+   if ( IsCmdLog()) {
+      string sLua = "EgtSurfTmRemovePart(" + ToString( nId) + "," +
+                                             ToString( nPart) + ")" +
+                    " -- Ok=" + ToString( bOk) ;
+      LOG_INFO( GetCmdLogger(), sLua.c_str()) ;
+   }
+  // restituisco risultato
+   return bOk ;
+}
+
 //-------------------------------------------------------------------------------
 bool
 ExeCutSurfTmPlane( int nId, const Point3d& ptOn, const Vector3d& vtN, bool bSaveOnEq, int nRefType)
diff --git a/EgtExecutor.rc b/EgtExecutor.rc
index 27c0353..0fee2b7 100644
Binary files a/EgtExecutor.rc and b/EgtExecutor.rc differ
diff --git a/LUA_GdbModifySurf.cpp b/LUA_GdbModifySurf.cpp
index 4b16a82..4655eb5 100644
--- a/LUA_GdbModifySurf.cpp
+++ b/LUA_GdbModifySurf.cpp
@@ -123,6 +123,23 @@ LuaSurfFrOffset( lua_State* L)
    return 1 ;
 }
 
+//----------------------------------------------------------------------------
+static int
+LuaSurfTmRemoveFacet( lua_State* L)
+{
+  // 2 parametri : nId, nFacet
+   int nId ;
+   LuaCheckParam( L, 1, nId)
+   int nFacet ;
+   LuaCheckParam( L, 2, nFacet)
+   LuaClearStack( L) ;
+  // eseguo rimozione della faccia dalla superficie
+   bool bOk = ExeSurfTmRemoveFacet( nId, nFacet) ;
+  // restituisco il risultato
+   LuaSetParam( L, bOk) ;
+   return 1 ;
+}
+
 //----------------------------------------------------------------------------
 static int
 LuaSurfTmSwapFacets( lua_State* L)
@@ -142,6 +159,23 @@ LuaSurfTmSwapFacets( lua_State* L)
    return 1 ;
 }
 
+//----------------------------------------------------------------------------
+static int
+LuaSurfTmRemovePart( lua_State* L)
+{
+  // 2 parametri : nId, nPart
+   int nId ;
+   LuaCheckParam( L, 1, nId)
+   int nPart ;
+   LuaCheckParam( L, 2, nPart)
+   LuaClearStack( L) ;
+  // eseguo rimozione della parte dalla superficie
+   bool bOk = ExeSurfTmRemovePart( nId, nPart) ;
+  // restituisco il risultato
+   LuaSetParam( L, bOk) ;
+   return 1 ;
+}
+
 //----------------------------------------------------------------------------
 static int
 LuaCutSurfTmPlane( lua_State* L)
@@ -264,7 +298,9 @@ LuaInstallGdbModifySurf( LuaMgr& luaMgr)
    bOk = bOk && luaMgr.RegisterFunction( "EgtSurfFrSubtract", LuaSurfFrSubtract) ;
    bOk = bOk && luaMgr.RegisterFunction( "EgtSurfFrIntersect", LuaSurfFrIntersect) ;
    bOk = bOk && luaMgr.RegisterFunction( "EgtSurfFrOffset", LuaSurfFrOffset) ;
+   bOk = bOk && luaMgr.RegisterFunction( "EgtSurfTmRemoveFacet", LuaSurfTmRemoveFacet) ;
    bOk = bOk && luaMgr.RegisterFunction( "EgtSurfTmSwapFacets", LuaSurfTmSwapFacets) ;
+   bOk = bOk && luaMgr.RegisterFunction( "EgtSurfTmRemovePart", LuaSurfTmRemovePart) ;
    bOk = bOk && luaMgr.RegisterFunction( "EgtCutSurfTmPlane", LuaCutSurfTmPlane) ;
    bOk = bOk && luaMgr.RegisterFunction( "EgtCutSurfTmClosedCurve", LuaCutSurfTmClosedCurve) ;
    bOk = bOk && luaMgr.RegisterFunction( "EgtSurfTmAdd", LuaSurfTmAdd) ;