BUG: since the depth check seems to fail under Mesa for this example, force backface culling to get it to render properly
BUG: since the depth check seems to fail under Mesa for this example, force backface culling to get it to render properly

jmerkow/VTK,gram526/VTK,candy7393/VTK,ashray/VTK-EVM,sankhesh/VTK,candy7393/VTK,gram526/VTK,mspark93/VTK,berendkleinhaneveld/VTK,sumedhasingla/VTK,naucoin/VTKSlicerWidgets,berendkleinhaneveld/VTK,johnkit/vtk-dev,msmolens/VTK,jmerkow/VTK,spthaolt/VTK,demarle/VTK,spthaolt/VTK,aashish24/VTK-old,arnaudgelas/VTK,sumedhasingla/VTK,Wuteyan/VTK,daviddoria/PointGraphsPhase1,johnkit/vtk-dev,gram526/VTK,mspark93/VTK,jeffbaumes/jeffbaumes-vtk,daviddoria/PointGraphsPhase1,arnaudgelas/VTK,gram526/VTK,hendradarwin/VTK,gram526/VTK,sumedhasingla/VTK,cjh1/VTK,naucoin/VTKSlicerWidgets,demarle/VTK,ashray/VTK-EVM,sankhesh/VTK,biddisco/VTK,arnaudgelas/VTK,arnaudgelas/VTK,SimVascular/VTK,SimVascular/VTK,berendkleinhaneveld/VTK,hendradarwin/VTK,sankhesh/VTK,collects/VTK,collects/VTK,johnkit/vtk-dev,keithroe/vtkoptix,collects/VTK,jmerkow/VTK,msmolens/VTK,candy7393/VTK,berendkleinhaneveld/VTK,msmolens/VTK,sankhesh/VTK,mspark93/VTK,berendkleinhaneveld/VTK,SimVascular/VTK,SimVascular/VTK,candy7393/VTK,keithroe/vtkoptix,sumedhasingla/VTK,naucoin/VTKSlicerWidgets,ashray/VTK-EVM,hendradarwin/VTK,demarle/VTK,hendradarwin/VTK,candy7393/VTK,mspark93/VTK,johnkit/vtk-dev,gram526/VTK,msmolens/VTK,keithroe/vtkoptix,sumedhasingla/VTK,biddisco/VTK,mspark93/VTK,sankhesh/VTK,arnaudgelas/VTK,sankhesh/VTK,daviddoria/PointGraphsPhase1,jeffbaumes/jeffbaumes-vtk,sumedhasingla/VTK,biddisco/VTK,candy7393/VTK,spthaolt/VTK,demarle/VTK,ashray/VTK-EVM,SimVascular/VTK,hendradarwin/VTK,daviddoria/PointGraphsPhase1,spthaolt/VTK,SimVascular/VTK,Wuteyan/VTK,demarle/VTK,aashish24/VTK-old,ashray/VTK-EVM,keithroe/vtkoptix,demarle/VTK,keithroe/vtkoptix,Wuteyan/VTK,berendkleinhaneveld/VTK,naucoin/VTKSlicerWidgets,mspark93/VTK,msmolens/VTK,naucoin/VTKSlicerWidgets,gram526/VTK,cjh1/VTK,johnkit/vtk-dev,biddisco/VTK,jmerkow/VTK,jmerkow/VTK,jeffbaumes/jeffbaumes-vtk,msmolens/VTK,daviddoria/PointGraphsPhase1,msmolens/VTK,Wuteyan/VTK,hendradarwin/VTK,demarle/VTK,mspark93/VTK,sankhesh/VTK,sankhesh/VTK,candy7393/VTK,Wuteyan/VTK,candy7393/VTK,aashish24/VTK-old,biddisco/VTK,keithroe/vtkoptix,aashish24/VTK-old,sumedhasingla/VTK,cjh1/VTK,biddisco/VTK,Wuteyan/VTK,gram526/VTK,biddisco/VTK,collects/VTK,aashish24/VTK-old,arnaudgelas/VTK,aashish24/VTK-old,jmerkow/VTK,SimVascular/VTK,naucoin/VTKSlicerWidgets,msmolens/VTK,johnkit/vtk-dev,johnkit/vtk-dev,cjh1/VTK,spthaolt/VTK,cjh1/VTK,keithroe/vtkoptix,ashray/VTK-EVM,jmerkow/VTK,cjh1/VTK,daviddoria/PointGraphsPhase1,ashray/VTK-EVM,jeffbaumes/jeffbaumes-vtk,jmerkow/VTK,jeffbaumes/jeffbaumes-vtk,demarle/VTK,berendkleinhaneveld/VTK,collects/VTK,sumedhasingla/VTK,jeffbaumes/jeffbaumes-vtk,spthaolt/VTK,collects/VTK,hendradarwin/VTK,Wuteyan/VTK,SimVascular/VTK,keithroe/vtkoptix,ashray/VTK-EVM,mspark93/VTK,spthaolt/VTK