John Baumann

I had this issue in 19.5 when the input was a vdb vector volume: point velocity mode did not work. If it is converted to a native Houdini vector with 3 parts, it works. It seems the Volume from Attribute sop inside the volumevelocity HDA expects a native volume.
Haven't checked to see if this is changed in H20

I have had some success separating out more sparse edge points ( with nearpoints or pcfilter ) and using them to generate a mask which is used in the second input of vdbsmooth back on the main set of points, often this will smooth the edges but leave detail in the main volume.