Should be thick enough to fit a player entity (i.e. 32 units), preferably even thicker.
-------- KEYS --------
<target key="target" name="target">must point to another trigger_warpzone, or...</target>
+<targetname key="targetname" name="targetname">must be pointed to by another trigger_warpzone. Should be pointed to by a misc_warpzone_position entity, or...</targetname>
+<target key="killtarget" name="killtarget">should point to a target_position entity.</target>
<target key="target2" name="target2">is triggered when a player ENTERS the warpzone (and warps away)</target>
<target key="target3" name="target3">is triggered when a player LEAVES the warpzone (from the other warp zone to this one)</target>
<target key="target4" name="target4">is triggered in both cases</target>
<boolean key="target_random" name="target_random">instead of triggering ALL matched entities, trigger ONE of them by random</boolean>
-<targetname key="targetname" name="targetname">must be pointed to by another trigger_warpzone. Should be pointed to by a misc_warpzone_position entity, or...</targetname>
-<target key="killtarget" name="killtarget">should point to a target_position entity, or</target>
<real key="warpzone_fadestart" name="warpzone_fadestart">start distance of fading out the warpzone</real>
<real key="warpzone_fadeend" name="warpzone_fadeend">end distance of fading out the warpzone (if viewer is further, warpzone is not rendered at all)</real>
-------- SPAWNFLAGS --------