<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>