diff --git a/EgtGraphics.rc b/EgtGraphics.rc
index 95d4afc..2e5283e 100644
Binary files a/EgtGraphics.rc and b/EgtGraphics.rc differ
diff --git a/SceneGeom.cpp b/SceneGeom.cpp
index 3e26c77..a3d4447 100644
--- a/SceneGeom.cpp
+++ b/SceneGeom.cpp
@@ -250,7 +250,7 @@ Scene::DrawGeoObj( const IGdbIterator& iIter, int nPass, const MdStMkCol& siObj)
             return false ;
         // calcolo la grafica
          PolyLine PL ;
-         pCurve->ApproxWithLines( EPS_SMALL, ANG_TOL_GRAPH_DEG, ICurve::APL_STD, PL) ;
+         pCurve->ApproxWithLines( EPS_SMALL, ANG_TOL_GRAPH_DEG, ICurve::APL_SPECIAL, PL) ;
          pGraphics->Clear() ;
          pGraphics->AddColor( siObj.colObj) ;
          pGraphics->AddPolyLine( PL) ;