Casting Wall Spells Around Corners

[Vanessa Hoskins]

With the various wall spells such as Wall of Fire, Wind Wall, and Blade Barrier: Can you cast them so that their effect goes around a corner as long as a point along the wall is within your line of effect and range?

Example:
Cackle the evil cleric has just finished beating up the local band of adventurers. They retreat around a corner and into a 5' wide corridor. Cackle decides to cast Blade Barrier and targets the square square he can see at the corner of the corridor.
Does his spell continue down the 5' corridor (chopping the pesky adventurers to bits) or does it immediately stop where his line of sight/effect stops?

[Dominigo]

I think if you go with the circular casting of blade barrier, it would absolutely work since you simply select the center point and let fly. With any shapeable effects, you will need line of effect to each point you are creating part of the spell in. In your example, its a little unclear. You could argue that he simply targets the area he can see and tells the spell to just keep going as far as it can in one direction, or you could say that he has to create each patch of the wall independently even though its not really shapeable. I would probably personally rule the former since that is the general way an area of effect spell works which most wall spells essentially are.

[Vanessa Hoskins]

That's sort of what I was thinking... However, my thoughts were that with a spell like blade barrier or wall of fire that only travel in a straight line, The line could continue while out of line of sight until it comes in contact with an invalid space (such as a wall). For shaped walls, you could not shape the wall outside of your line of sight, but it could continue traveling in the same direction.

For the around the corner example, I could release a burst or blast spell with a range at the corner and hit things that I cannot see (such as fireball or stinking cloud), but I cannot place the origin point to a place I cannot see. I was thinking it may be the same with a wall spell. The origin point is where I can see, and the effect continues where I cannot see.

[LazarX]

When casting a spell you have to have a target point.

You MUST have line of effect to said target point. In other words, you have to expose yourself to it, you might have cover but you can't be around the corner from the target point.

Once that's satisfied the spells effects will operate as normal centered (or emanating from as appropriate) on that target point.