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esselfortium said:
Make a thin sector (1 unit is fine) and lower its floor deep into the ground. Flying monsters will be able to cross over it, but land-bound monsters should be blocked by the dropoff.

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Enjay said:

And, as an added bonus, if you want the "line" to become passable by walking enemies later on, you can raise the floor to match the sectors on either side - the dropoff is removed and monsters can walk over the sector. (This can, of course, be done the other way around to make a previously walkable area non-walkable.)

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schwerpunk said:
Is this on the wiki somewhere? Because if it isn't it definitely should be, because it's incredibly simple to perform, and very, very useful!

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esselfortium said:
Make a thin sector (1 unit is fine) and lower its floor deep into the ground. Flying monsters will be able to cross over it, but land-bound monsters should be blocked by the dropoff.

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40oz said:
I assume the op is posting because he found a way to make a handrail of some sort that blocks everything except projectiles from passing and that wasn't the result he was looking for. (I say this because I don't see the practicality of esselfortiums solution in actual mapping)

That said, I think rayziks response would be most useful, even though he and I both don't use the effect often enough to explain it in a way that makes sense.

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