Hey, it’s me again with the noobie question 
Do I need to set up volume for submerged objects like stones in Luxrender? And What should that volume be, since there are no volume presets for opaque materials…or that is just what I think.
Thanx
I haven’t heard any mention of that being needed from what I read at the Luxrender forums.
Since a stone is opaque and wouldn’t have noticeable scattering I would think giving it a volume wouldn’t make much sense even if it’s inside a volume.