i was playing a game as timber and i was hammering someone wall but when my scan wore off i still had vision over all the buildings and the treant and nature prothets and it lasted very long. i had no problem hunting down everyone and once i broke into thier base they were doomed.

i also played a game as treant were the timber were at me non stop, it was like they saw me.

the vision was like thirst, i didnt see around them but only the unit alone. in this case the unit was a treant or NP.

this was like the timber had thirst in thier scan and they only needed to be scanned once every minute