diff --git a/EXE_GeoSnap.cpp b/EXE_GeoSnap.cpp
index 769a6ed..6e52ff5 100644
--- a/EXE_GeoSnap.cpp
+++ b/EXE_GeoSnap.cpp
@@ -951,6 +951,21 @@ ExeSurfFrNormVersor( int nId, int nRefId, Vector3d& vtNorm)
    return TrasformVector( pGeomDB, nId, nRefId, vtNorm) ;
 }
 
+//----------------------------------------------------------------------------
+bool
+ExeSurfFrGrossArea( int nId, double& dArea)
+{
+   IGeomDB* pGeomDB = GetCurrGeomDB() ;
+   VERIFY_GEOMDB( pGeomDB, false)
+  // verifico il parametro
+   if ( &dArea == nullptr)
+      return false ;
+  // recupero la Regione
+   const ISurfFlatRegion* pSfr = GetSurfFlatRegion( pGeomDB->GetGeoObj( nId)) ;
+  // ne restituisco l'area senza eventuali buchi
+   return ( pSfr != nullptr  &&  pSfr->GetGrossArea( dArea)) ;
+}
+
 //----------------------------------------------------------------------------
 int
 ExeSurfFrChunkCount( int nId)
diff --git a/LUA_GeoSnap.cpp b/LUA_GeoSnap.cpp
index b68e29d..f42584c 100644
--- a/LUA_GeoSnap.cpp
+++ b/LUA_GeoSnap.cpp
@@ -634,6 +634,23 @@ LuaSurfFrNormVersor( lua_State* L)
    return 1 ;
 }
 
+//----------------------------------------------------------------------------
+static int
+LuaSurfFrGrossArea( lua_State* L)
+{
+  // 1 parametro : Id
+   int nId ;
+   LuaCheckParam( L, 1, nId)
+   LuaClearStack( L) ;
+  // recupero la sua area senza eventuali buchi
+   double dArea ;
+   if ( ExeSurfFrGrossArea( nId, dArea))
+      LuaSetParam( L, dArea) ;
+   else
+      LuaSetParam( L) ;
+   return 1 ;
+}
+
 //----------------------------------------------------------------------------
 static int
 LuaSurfFrChunkCount( lua_State* L)
@@ -1044,6 +1061,7 @@ LuaInstallGeoSnap( LuaMgr& luaMgr)
    bOk = bOk && luaMgr.RegisterFunction( "EgtSurfArea", LuaSurfArea) ;
    bOk = bOk && luaMgr.RegisterFunction( "EgtSurfVolume", LuaSurfVolume) ;
    bOk = bOk && luaMgr.RegisterFunction( "EgtSurfFrNormVersor", LuaSurfFrNormVersor) ;
+   bOk = bOk && luaMgr.RegisterFunction( "EgtSurfFrGrossArea", LuaSurfFrGrossArea) ;
    bOk = bOk && luaMgr.RegisterFunction( "EgtSurfFrChunkCount", LuaSurfFrChunkCount) ;
    bOk = bOk && luaMgr.RegisterFunction( "EgtSurfFrChunkSimpleClassify", LuaSurfFrChunkSimpleClassify) ;
    bOk = bOk && luaMgr.RegisterFunction( "EgtSurfTmFacetCount", LuaSurfTmFacetCount) ;