Merge pull request #785 from commontk/update-ctkVTKAbstractView-to-set-DepthPeelingForVolumes

ENH: ctkVTKAbstractView: Update setUseDepthPeeling to also enable depth peel for volumes

Libs/Visualization/VTK/Widgets/ctkVTKAbstractView.cpp

@@ -483,6 +483,9 @@ void ctkVTKAbstractView::setUseDepthPeeling(bool useDepthPeeling)
     }
   this->renderWindow()->SetMultiSamples(useDepthPeeling ? 0 : nSamples);
   renderer->SetUseDepthPeeling(useDepthPeeling ? 1 : 0);
+#if CTK_USE_QVTKOPENGLWIDGET
+  renderer->SetUseDepthPeelingForVolumes(useDepthPeeling);
+#endif
 }
 
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