http://www.project1999.com/forums/sh...ght=Line+sight
See my thread above. Outdoor zones incorrectly require LoS on tons of detrimental spells that they should not require LoS for. You could cast through walls and such on live all the time. Same with hills, trees and buildings. This was only in outdoor zones though.
Currently on this server however hills and trees will unclassicly block LoS. This is something Id love to see fixed, especially since Velious introduces lots of relevant high end outdoor zones.