So i guess you are talking out your *** due to having zero knowledge about even the most basic game mechanics. Let me help you out. The render distance setting doesn't actually effect when other players render it, it will "hide" air if its set low enough, but even without seeing it you can still shoot at it. Tanks/Air/Infantry all have a set distance at the point they render in and can be shot, this number only goes down based on the size of the fight it does not go past its cap. Infantry render range is not 400m, therefore nothing can kill infantry 400m away, however infantry can kill tank/air over 400m due to them rendering in at a longer distance, understand? Learn what you're talking about then come back and continue the discussion.