[vtkusers] Transparent Viewport

[Alireza Mehrtash]

I tried that but it gives:
vtkRendererCollection (0x8a6be0): Invalid layer for renderer: not rendered.



On Fri, Aug 8, 2014 at 5:50 PM, David E DeMarle <dave.demarle at kitware.com>
wrote:

> Call SetLayer(1) on the overlay layer.
> On Aug 8, 2014 5:27 PM, "Alireza Mehrtash" <mehrtash at bwh.harvard.edu>
> wrote:
>
>> Hi All,
>>
>> 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.
>>
>> Thanks,
>> Alireza
>>
>>
>> [1]
>> http://www.itk.org/Wiki/VTK/Examples/Cxx/Widgets/OrientationMarkerWidget
>>
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