Bwaaaaaah... seems like there would be enough info in this thread to get OpenVDB installed, but I still ran into the same trouble as many before me.
"// Error: line 1: The specified procedure could not be found. (OpenVDB) //
I've got the icons, scripts and shelf installed in their respective folders under maya\2016\prefs, maya2016.mod in maya\2016\modules, OpenVDB.mll in C:\Program Files\Autodesk\Maya2016\bin\plug-ins and ai.dll in C:\Program Files\Autodesk\Maya2016\bin. But when I try to load the plugin it still doesnt find all it needs. I do not have mtoa installed nor do I have access to it. I read this comment (on page 2), but cant figure out which env var to put where (and no-one else mentions it):" Guys if u don't ve arnold in ur machine then download arnold SDK & add enviornment veriable for ai.dll/ai.so "