diff --git a/EgtGraphics.rc b/EgtGraphics.rc
index 2a12b9d..8339764 100644
Binary files a/EgtGraphics.rc and b/EgtGraphics.rc differ
diff --git a/SceneGeom.cpp b/SceneGeom.cpp
index afa1abf..3e26c77 100644
--- a/SceneGeom.cpp
+++ b/SceneGeom.cpp
@@ -174,14 +174,19 @@ Scene::DrawGeoObj( const IGdbIterator& iIter, int nPass, const MdStMkCol& siObj)
      // nuova modalità grafica solo per superfici con molti triangoli
       const int N_MIN_TRIA_NEWWAY = 100 ; 
       bool bNewWay = false ;
-      if ( m_bNewWay  &&  ( nGeoType & GEO_SURF) != 0) {
-         const ISurfTriMesh* pSTM = nullptr ;
-         switch ( nGeoType) {
-         case SRF_TRIMESH : pSTM = GetSurfTriMesh( pGeoObj) ; break ;
-         case SRF_FLATRGN : pSTM = GetSurfFlatRegion( pGeoObj)->GetAuxSurf() ; break ;
-         }    
-         if ( pSTM != nullptr  &&  pSTM->GetTriangleCount() > N_MIN_TRIA_NEWWAY)
+      if ( m_bNewWay) {
+         if (( nGeoType & GEO_SURF) != 0) {
+            const ISurfTriMesh* pSTM = nullptr ;
+            switch ( nGeoType) {
+            case SRF_TRIMESH : pSTM = GetSurfTriMesh( pGeoObj) ; break ;
+            case SRF_FLATRGN : pSTM = GetSurfFlatRegion( pGeoObj)->GetAuxSurf() ; break ;
+            }    
+            if ( pSTM != nullptr  &&  pSTM->GetTriangleCount() > N_MIN_TRIA_NEWWAY)
+               bNewWay = true ;
+         }
+         else if (( nGeoType & GEO_VOLUME) != 0) {
             bNewWay = true ;
+         }
       }  
       ObjEGrGraphics* pGraphics = CreateObjEGrGraphics( bNewWay) ;
       if ( pGraphics == nullptr)
@@ -324,27 +329,32 @@ Scene::DrawGeoObj( const IGdbIterator& iIter, int nPass, const MdStMkCol& siObj)
          const IVolZmap* pZmap = GetVolZmap( pGeoObj) ;
          if ( pZmap == nullptr)
             return false ;
-        // calcolo la grafica
+         // recupero il materiale
+         Material mMat ;
+         if ( ! iIter.GetCalcMaterial( mMat))
+            mMat.Set( m_colDef) ;
+        // impostazioni iniziali
          pGraphics->Clear() ;
-         pGraphics->AddColor( BLUE) ;
-         POLYLINELIST lstPL ;
-         for ( int i = 0 ; ; ++ i) {
-            bool bOutBreak = false ;
-            for ( int j = 0 ; ; ++ j) {
-               if ( pZmap->GetDexelLines( 1, j, i, lstPL)) {
-                  for ( const auto& PL : lstPL)
-                     pGraphics->AddPolyLine( PL) ; 
-               }
-               else {
-                  if ( j == 0)
-                     bOutBreak = true ;
-                  break ;
-               }
-            } 
-            if ( bOutBreak)
-               break ;    
-         }
-
+         pGraphics->AddColor( siObj.colObj) ;  // per wireframe
+         pGraphics->AddMaterial( mMat.GetAmbient(), mMat.GetDiffuse(),
+                                 mMat.GetSpecular(), mMat.GetShininess()) ;
+         pGraphics->AddBackMaterial( GetSurfBackColor( mMat.GetDiffuse())) ;
+        // recupero la geometria
+         TRIA3DLIST lstTria ;
+         pZmap->GetAllTriangles( lstTria) ;
+        // passo i triangoli alla grafica
+         pGraphics->StartTriangles( int( lstTria.size())) ;
+         for ( const auto& Tria : lstTria) {
+            TriFlags3d TFlags ;
+            TriNormals3d TNrms ;
+            for ( int i = 0 ; i < 3 ; ++i) {
+               // i triangoli sono sempre parte di un quadrilatero -> terzo lato da non visualizzare
+               TFlags.bFlag[i] = ( i != 2 ? true : false) ;
+               TNrms.vtN[i] = Tria.GetN() ;
+            }
+            pGraphics->AddTriangle( Tria, TFlags, TNrms) ;
+         }    
+         pGraphics->EndTriangles() ;
       }
      // se testo
       else if ( nGeoType == EXT_TEXT) {
@@ -381,7 +391,7 @@ Scene::DrawGeoObj( const IGdbIterator& iIter, int nPass, const MdStMkCol& siObj)
   // se hiddenline e non selezione
    if ( m_nShowMode == SM_HIDDENLINE  &&  ! m_bSelect) {
      // in prima passata disegno solo le superfici opache
-      if ( nPass == 1  &&  ( ( nGeoType & GEO_SURF) == 0  ||  nAlpha <= ALPHA_LIM))
+      if ( nPass == 1  &&  ( ( nGeoType & ( GEO_SURF | GEO_VOLUME)) == 0  ||  nAlpha <= ALPHA_LIM))
          return true ;
    }
 
@@ -390,7 +400,7 @@ Scene::DrawGeoObj( const IGdbIterator& iIter, int nPass, const MdStMkCol& siObj)
    if ( m_nShowMode == SM_SHADING  &&  ! m_bSelect) {
      // in prima passata disegno solo le superfici opache e metto in un vettore quelle semitrasparenti
       if ( nPass == 1) {
-         if ( ( nGeoType & GEO_SURF) == 0)
+         if ( ( nGeoType & ( GEO_SURF | GEO_VOLUME)) == 0)
             return true ;
          else {
             if ( nAlpha > ALPHA_LIM)
@@ -413,7 +423,7 @@ Scene::DrawGeoObj( const IGdbIterator& iIter, int nPass, const MdStMkCol& siObj)
          }
       }
      // in seconda passata disegno solo dimensioni 0 e curve
-      if ( nPass == 2  &&  ( nGeoType & GEO_SURF) != 0)
+      if ( nPass == 2  &&  ( nGeoType & ( GEO_SURF | GEO_VOLUME)) != 0)
          return true ;
    }