Quote Originally Posted by Vargouille View Post
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The practical upshot is that these spells may now sometimes be blocked from dealing damage (& other affects) due to "intervening terrain" where they would not have before (for both players and monsters), but are now doing only a fraction of the LOS checks (raycasts) that they did before. Those LOS checks are both computationally expensive and happen quite a lot in those cases.
Quote Originally Posted by Tevasama View Post
I just ran some tests with Wall of Fire and I do not like the new LoS check system if what I'm reporting is WAI. My wizards throw up a Wall of Fire at a door, then pull the lever to open the door. However it seems that the LoS check happens only when the Wall of Fire is first put up, standing in the fire as the door is opened absolutely no monsters took any damage while they attacked me (waited long enough there would have been several ticks of fire damage before this update); it seems the closed door being opened is not registering with the reduced check system.....
Thinking of my Arty's Blade Barriers - which I haven't tested myself yet:

So theoretically = I throw it down at a door, then open the door - it's sounding from Varg's description & Tev's test of Firewall, that if a mob can't see the center of the spell when it's cast, then that mob will be immune from damage if it runs into the spell through the now-open door?