diff --git a/EgtMachKernel.rc b/EgtMachKernel.rc
index 5c6d8b7..7084942 100644
Binary files a/EgtMachKernel.rc and b/EgtMachKernel.rc differ
diff --git a/MachiningConst.h b/MachiningConst.h
index 92366d3..54f4d73 100644
--- a/MachiningConst.h
+++ b/MachiningConst.h
@@ -27,9 +27,10 @@ static std::string MCH_PATH = "P" ;
 static std::string MCH_RISE = "RISE" ;
 // Nomi di entità di preview
 static std::string MCH_PV_CUT = "CUT" ;
+static std::string MCH_PV_RCUT = "RCUT" ;
 static std::string MCH_PV_PRE_CUT = "PRC" ;
 static std::string MCH_PV_POST_CUT = "POC" ;
-// Chaive info con DeltaT lama in Preview
+// Chiave info con DeltaT lama in Preview
 static std::string MCH_PV_KEY_DT = "DT" ;
 
 //----------------------------------------------------------------------------
diff --git a/Sawing.cpp b/Sawing.cpp
index d02fff5..373bd2b 100644
--- a/Sawing.cpp
+++ b/Sawing.cpp
@@ -1059,7 +1059,7 @@ Sawing::GenerateEntityPv( const ICurveLine* pLine, const Vector3d& vtTool, const
    m_pGeomDB->SetName( nPxId, sName) ;
    m_pGeomDB->SetMaterial( nPxId, BLUE) ;
 
-  // rettangolo per parte di taglio completo
+  // rettangolo e regione equivalente per parte di taglio completo
    Point3d ptIni = pLine->GetStart() + dElev * vtCorr ;
    Point3d ptEnd = pLine->GetEnd() + dElev * vtCorr ;
    Vector3d vtToolH( vtTool.x, vtTool.y, 0) ;
@@ -1067,9 +1067,12 @@ Sawing::GenerateEntityPv( const ICurveLine* pLine, const Vector3d& vtTool, const
    Point3d ptCross = ptEnd + vtToolH ;
    Vector3d vtDZ( 0, 0, 0.1) ;
    int nId = ExeCreateRectangle3P( nPxId, ptIni + vtDZ, ptCross + vtDZ, ptEnd + vtDZ, RTY_LOC) ;
-   // assegno nome e colore
    m_pGeomDB->SetName( nId, MCH_PV_CUT) ;
    m_pGeomDB->SetMaterial( nId, LIME) ;
+   int nRId = ExeCreateSurfFrRectangle3P( nPxId, ptIni + vtDZ, ptCross + vtDZ, ptEnd + vtDZ, RTY_LOC) ;
+   m_pGeomDB->SetName( nRId, MCH_PV_RCUT) ;
+   Color colR = LIME ; colR.SetAlpha( 0) ;  // completamente trasparente
+   m_pGeomDB->SetMaterial( nRId, colR) ;
 
   // distanza XY tra centro e bordo taglio
    double dDeltaT = (( dElev < 0.5 * m_TParams.m_dDiam) ? sqrt( dElev * m_TParams.m_dDiam - dElev * dElev) : 0) ;