Fixed VDB visibility issue when outputted in light AOVs.
On this fix we are taking two cases in consideration: 1-) Don't output vdb in AOVs if it is used as phantom. 2-) Don't output vdb in AOVs if it does not have a proper emission grid.
On this fix we are taking two cases in consideration: 1-) Don't output vdb in AOVs if it is used as phantom. 2-) Don't output vdb in AOVs if it does not have a proper emission grid.