I've been trying to delve into the whole terrain/LOS aspects of the CM, but there is not a lot of info available on the forum for obvious reasons. I can only experiment in the editor. Here is how I believe the game determines LOS (when you use the target-command): There are hard and soft LOS-blockers.  Hard LOS-blockers instantly block any LOS unless the LOS passes over the blocker's hitbox: trunks of foliage-tiles (even low bushes have very small trunks) wall-tiles (hedge