diff --git a/Controller.vb b/Controller.vb
index 181dd08..fa4d8f5 100644
--- a/Controller.vb
+++ b/Controller.vb
@@ -225,7 +225,7 @@ Public Class Controller
       ' aggiorno
       EgtZoom(ZM.ALL)
       RaiseEvent UpdateUI(Me, True)
-     ' Gestione risultato
+      ' Gestione risultato
       RaiseEvent OnNewProject(Me, bOk)
       Return bOk
    End Function
@@ -511,7 +511,7 @@ Public Class Controller
       ElseIf nFileType = FT.STL Then
          bOk = EgtExportStl(GDB_ID.ROOT, sFileName)
       ElseIf nFileType = FT.IMG Then
-         bOk = EgtGetImage(SM.SHADING, New Color3d(255, 255, 255), New Color3d(255, 255, 255),
+         bOk = EgtGetImage(EgtGetShowMode(), New Color3d(255, 255, 255), New Color3d(255, 255, 255),
                            m_nImgWidth, m_nImgHeight, sFileName)
       End If
       DisableCommandLog()
diff --git a/EgtInterface.vb b/EgtInterface.vb
index 8eeefd9..e25082e 100644
--- a/EgtInterface.vb
+++ b/EgtInterface.vb
@@ -1194,6 +1194,21 @@ Public Function EgtSetOutText(Callback As OutTextCallback) As Boolean
    End If
 End Function
 
+   <DllImport(EgtIntDll32, CharSet:=CharSet.Unicode, EntryPoint:="EgtSetMainWindowHandle"), SuppressUnmanagedCodeSecurity()>
+   Private Function EgtSetMainWindowHandle_32(hMainWnd As IntPtr) As Boolean
+   End Function
+   <DllImport(EgtIntDll64, CharSet:=CharSet.Unicode, EntryPoint:="EgtSetMainWindowHandle"), SuppressUnmanagedCodeSecurity()>
+   Private Function EgtSetMainWindowHandle_64(hMainWnd As IntPtr) As Boolean
+   End Function
+   Public Function EgtSetMainWindowHandle(hMainWnd As IntPtr) As Boolean
+      If IntPtr.Size = 4 Then
+         Return EgtSetMainWindowHandle_32(hMainWnd)
+      Else
+         Return EgtSetMainWindowHandle_64(hMainWnd)
+      End If
+   End Function
+
+
 '---------- UiUnits ------------------------------------------------------------
 <DllImport(EgtIntDll32, CharSet:=CharSet.Unicode, EntryPoint:="EgtSetUiUnits"), SuppressUnmanagedCodeSecurity()>
 Private Function EgtSetUiUnits_32(bMM As Boolean) As Boolean
@@ -11145,12 +11160,10 @@ Public FIX_TYPE As String = "TYPE"
 Public FIX_REF As String = "REF"
 Public FIX_VAC As String = "VAC"
 Public FIX_VIS As String = "VIS"
-' Costanti : arco dei riferimenti
+' Costanti : arco di battuta dei riferimenti
 Public REF_ARC As String = "Ref"
-' Costanti : disco di contatto colorato
-Public REF_CONTACTCOLDISK As String = "ContactColoredDisk"
-' Costanti : superficie di contatto colorata
-Public REF_CONTACTSURFACE As String = "ContactSurface"
+' Costanti : disco colorato dei riferimenti 
+Public REF_DISK As String = "RefDisk"
 ' Costanti : tipo interferenza lavorazioni piane con pezzi
 Public Enum FMI_TYPE As Integer
    NONE = 0
diff --git a/Form1.vb b/Form1.vb
index 06f91de..800dcea 100644
--- a/Form1.vb
+++ b/Form1.vb
@@ -184,6 +184,9 @@ Public Class Form1
       If Not Scene1.Init() Then
          Application.Exit()
       End If
+      ' Recupero e imposto handle finestra principale
+      Dim hMainWnd As IntPtr = Me.Handle
+      EgtSetMainWindowHandle(hMainWnd)
       ' inizializzo gestore lavorazioni
       EgtInitMachMgr(m_sMachinesRoot)
       ' imposto unità di misura per interfaccia utente
diff --git a/My Project/AssemblyInfo.vb b/My Project/AssemblyInfo.vb
index 4a64e28..cf4b01c 100644
--- a/My Project/AssemblyInfo.vb	
+++ b/My Project/AssemblyInfo.vb	
@@ -46,5 +46,5 @@ Imports System.Runtime.InteropServices
 ' utilizzando l'asterisco (*) come descritto di seguito:
 ' <Assembly: AssemblyVersion("1.0.*")> 
 
-<Assembly: AssemblyVersion("1.8.2.5")> 
-<Assembly: AssemblyFileVersion("1.8.2.5")> 
+<Assembly: AssemblyVersion("1.8.2.6")> 
+<Assembly: AssemblyFileVersion("1.8.2.6")> 
diff --git a/Scene.vb b/Scene.vb
index a47678b..273e0c4 100644
--- a/Scene.vb
+++ b/Scene.vb
@@ -1074,6 +1074,20 @@ Public Class Scene
       End If
    End Sub
 
+   Public Function GetSnapPointType() As SP
+      If m_nStatus <> ST.SELPOINT And m_nStatus <> ST.SELPOINTZ Then
+         Return SP.PT_NONE
+      Else
+         Return m_nSnapType
+      End If
+   End Function
+
+   Public Function SetSnapPointType(SnapPointType As SP) As Boolean
+      If IsNothing(SnapPointType) Then Return False
+      m_nSnapType = If(SnapPointType >= SP.PT_NONE And SnapPointType <= SP.PT_MINDIST, SnapPointType, SP.PT_NONE)
+      Return True
+   End Function
+
    '-------------------------------- KeyDown --------------------------------------------------------
    Private Sub Scene_KeyDown(ByVal sender As System.Object, ByVal e As KeyEventArgs) Handles MyBase.KeyDown
       ' Con selezione punti e drag abilitato
@@ -1253,14 +1267,6 @@ Public Class Scene
       RaiseEvent OnCloseGetDist(Me)
    End Sub
 
-   Public Function GetSnapPointType() As SP
-      If m_nStatus <> ST.SELPOINT And m_nStatus <> ST.SELPOINTZ Then
-         Return SP.PT_NONE
-      Else
-         Return m_nSnapType
-      End If
-   End Function
-
    Public Sub SetDragIntersForSelPoint(ByVal bVal As Boolean)
       m_bAlsoDragIntersForSnap = bVal
    End Sub