If you are playing not for pvp and your goal is to get safety from one point of the map to another - you can disable trees and stones (which you can dig) on every map. This will give you far better distance of vision and you will see anemy first. I dont recommend to pvp or ride using this method, because this is only visual and you cant fire or ride through trees. This method technically isn't hack, so you shouldn't get ban from battleye or vac, iIhave players with it for last ~3 month. You can be banned only if admins will use "spy" on you.

1. Exit from server
2. Go to you map folder, for example "C:\Program Files (x86)\Steam\steamapps\common\Unturned\Maps\Russia"
3. Go to folder Terrain
4. Rename file Trees.dat to Trees2.dat
5. Go back to server

Sorry, but i "can't post links", so see screenshots manually.
i.imgur.com/YnnBr2k.jpg
i.imgur.com/Z3alnyk.jpg