_thresholdActor = vtkImageActor::New( );
_thresholdActor->SetOpacity( 0.6 );
_thresholdActor->InterpolateOn( );
- _thresholdActor->SetPosition( 0,0, 900-1 );
+ _thresholdActor->SetPosition( 0,0, -900-1 );
} // _thresholdActor
_baseView->GetRenderer()->AddActor( _thresholdActor );
_actorPresent = true;