It seems that delete unused nodes (optimize scene size too?), seem to delete my light select passes? Not sure if it deletes any other elements in Vray, but it is really annoying setting up 10-15 light selects just to have them deleted when you try to clean up your scene :).
Ran into the same issue here with light selects being deleted after Deleting Unused Nodes…looking through the Maya Preferences I was unable to find that option ‘Delete empty sets’…any chance you can point me to that option? Thanks in advance!