If you cannot go over the terrain, the arrow is red.
Before you say this is dumbing down the game, the terrain isn't very clear about if you can move there, so I think it would mostly just fix a lot of frustrations.
Reposted this from GD because it probably belongs in here.
I like the idea it does that for volley attacks but Rivens valor it can go over Jarvans wall but not terrain ive died by that twice now
© 2013 Riot Games, Inc. All rights reserved. Riot Games, League of Legends and PvP.net are trademarks, services marks, or registered trademarks of Riot Games, Inc.