[vtkusers] Multiple Surfaces at same height

[PsyVis]

Hello 

I am trying to visualise some coastal hydrodynamical data taken from a
mathematical model where I've got two poly data surfaces (one representing
the sea floor and the other representing the water level). At some points
the water level gets clamped to the same height as the sea floor so there
are two surfaces in the exact same space. When this is rendered it leaves an
undesirable effect (almost like tiger printing - where the renderer cannot
decide which triangles to draw on top of one another). I've tried using
seperate renderers(in the same renderwindow) and setting layers but this
doesn't work either.

Thanks very much

Rich

Here is the code for the rendering process


        vtkRenderWindow renWin = new vtkRenderWindow();
        renWin = renPanel.GetRenderWindow();
        renWin.SetNumberOfLayers(2);

        vtkRenderer wlRen = new vtkRenderer();
        wlRen = renPanel.GetRenderer();
        wlRen.AddActor(wlActor);    
        wlRen.SetBackground(Colors.SLATE_GREY);
        wlRen.SetLayer(0);

        vtkCamera camera = wlRen.GetActiveCamera();
        camera.Zoom(1.5);

        wlRen.SetActiveCamera(camera);
       
        vtkRenderer ren = new vtkRenderer();
        ren = renPanel.GetRenderer();
        ren.AddActor(bActor);
        ren.AddActor(bbActor);
        ren.AddActor(edgeActor);
      
        
        ren.SetActiveCamera(camera);
        ren.SetLayer(1);
       
         renWin.AddRenderer(ren);
         renWin.AddRenderer(wlRen);
        


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