Contents
Adding Material
Click on the Volume tool 
in RenderMan Shelf or in your RIS Network, create a PxrVolume VOP.
Assigning Material
Drag your PxrVolume VOP to the Material parameter of your volume OBJ.
For deformed volume, velocity and density must be wired using PxrPrimVar. This is because 'v' in VDB is a built-in variable and we need to make sure it is a primvar.
