Updated RenderOverlay() for background and frame
Updated RenderOverlay() for background and frame

Change-Id: I83f1652c066039fbcf1b26d4cb701604834207d8

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