Editing v0.34:Impassable tile

{{quality|Fine|01:49, 13 February 2013 (UTC)}}{{av}}

'''Impassable tiles''' are tiles in a [[building]] that creatures cannot move into--they function similarly to a constructed [[wall]]. Some [[workshop]]s, like the [[bowyer's workshop]] and [[jeweler's workshop]], have what is in effect a three square wall down one side. Non-workshop buildings (such as [[furnace]]s and [[screw pump]]s) may also include impassable tiles.

Impassable tiles appear as a dark green color during initial placement (passable tiles are shown in light green). One common use for impassable tiles is to block access to other [[z-level]]s. A [[magma smelter]], for instance, has a single impassable tile in the top center--placing this tile over your [[magma]] access channel prevents unlucky dwarves from falling in, and [[fire imp|unwelcome beasts]] from crawling out. It is worth noting that [[building destroyer]]s can only destroy buildings that they can [[Building_destroyer#Destroying_from_underneath|path to the z-level of]]. For [[machinery]], the impassable tiles can be used to connect power through z-levels (see [[pump stack]] for an example).

Be careful when building workshops in tight quarters; more than one dwarf has perished from thirst after constructing a building that blocks the only path back to the fortress proper.
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	Impassable tiles appear as a dark green color during initial placement (passable tiles are shown in light green). One common use for impassable tiles is to block access to other [[z-level]]s. A [[magma smelter]], for instance, has a single impassable tile in the top center--placing this tile over your [[magma]] access channel prevents unlucky dwarves from falling in, and [[fire imp\|unwelcome beasts]] from crawling out. It is worth noting that [[building destroyer]]s can only destroy buildings that they can [[Building_destroyer#Destroying_from_underneath\|path to the z-level of]]. For [[machinery]], the impassable tiles can be used to connect power through z-levels (see [[pump stack]] for an example).		Impassable tiles appear as a dark green color during initial placement (passable tiles are shown in light green). One common use for impassable tiles is to block access to other [[z-level]]s. A [[magma smelter]], for instance, has a single impassable tile in the top center--placing this tile over your [[magma]] access channel prevents unlucky dwarves from falling in, and [[fire imp\|unwelcome beasts]] from crawling out. It is worth noting that [[building destroyer]]s can only destroy buildings that they can [[Building_destroyer#Destroying_from_underneath\|path to the z-level of]]. For [[machinery]], the impassable tiles can be used to connect power through z-levels (see [[pump stack]] for an example).

−	Be careful when building workshops in tight quarters; more than one dwarf has perished from thirst after constructing a ~~[[jeweler's workshop\|~~building]] that blocks the only path back to the fortress proper.	+	Be careful when building workshops in tight quarters; more than one dwarf has perished from thirst after constructing a building that blocks the only path back to the fortress proper.