The VDB Points primitive contains points that are not directly accessible through most operators. The VDB Points Delete SOP allows one to delete points belonging to point groups.
The group of VDB primitives to delete points within. If these are not VDB Points primitives, they are ignored.
VDB Points Groups
Named groups inside the VDB Points that should be deleted.
Normally all points in the group are deleted. If inverted, all the points not in the group will be deleted.
Drop Points Groups
When all points inside a group are deleted, this will eliminate the group as well.