BUG: Render in Opaque pass, to avoid depth peeling pass.
BUG: Render in Opaque pass, to avoid depth peeling pass.

Depth peeling keeps the alpha component of textures from being used
during blending, and considering the importance of alpha to image
compositing, it is better to avoid the depth peeling pass by always
rendering in the Opaque pass.

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