<div dir="ltr"><div class="gmail_default" style="font-family:arial,helvetica,sans-serif">I tried that but it gives:</div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif"><div class="gmail_default">
vtkRendererCollection (0x8a6be0): Invalid layer for renderer: not rendered.</div><div><br></div></div></div><div class="gmail_extra"><br><br><div class="gmail_quote">On Fri, Aug 8, 2014 at 5:50 PM, David E DeMarle <span dir="ltr"><<a href="mailto:dave.demarle@kitware.com" target="_blank">dave.demarle@kitware.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><p>Call SetLayer(1) on the overlay layer.</p>
<div class="gmail_quote"><div><div class="h5">On Aug 8, 2014 5:27 PM, "Alireza Mehrtash" <<a href="mailto:mehrtash@bwh.harvard.edu" target="_blank">mehrtash@bwh.harvard.edu</a>> wrote:<br type="attribution">
</div></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div><div class="h5">
<div dir="ltr"><div class="gmail_default" style="font-family:arial,helvetica,sans-serif">Hi All,</div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif"><br></div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif">
I have two renderers in a render window with one of them as a bottom left viewport (the code and the picture are attached). I want the viewport renderer to be transparent exactly like the vtk oreientation marker [1]. I would appreciate if you help me achieving this.</div>
<div class="gmail_default" style="font-family:arial,helvetica,sans-serif"><br></div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif">Thanks,</div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif">
Alireza</div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif"><br></div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif"><br></div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif">
[1] <a href="http://www.itk.org/Wiki/VTK/Examples/Cxx/Widgets/OrientationMarkerWidget" target="_blank">http://www.itk.org/Wiki/VTK/Examples/Cxx/Widgets/OrientationMarkerWidget</a></div></div>
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