vtkPicker does not pick black pixels
This issue was created automatically from an original Mantis Issue. Further discussion may take place here.
when using vtkPicker with vtkImageViewer2,
int status = this->Interactor->GetPicker()->Pick(this->StartPosition[0], this->StartPosition[1], 0, // always zero. this->Interactor->GetRenderWindow()->GetRenderers()->GetFirstRenderer());
returns 0 for black pixels, works fine for others. Did not happen in previous versions of VTK (prior to 3.6.0)