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Removing a layer will cause the layer above to randomly pick from trees that the now removed layer could have handled and that the layer above can handle. Level three: a level lacking the trees the first level had, while still having those the second introduced, which also has Nether-caps and Blood thorns.Īny cavern layer without a pool of water will have only muddy dense floor fungus and no plants or trees except for Blood thorns. Level two: a level filled with, in addition to the above, Goblin-caps, Spore trees, Black-caps, and Tunnel tubes. Level one: a benign (or as nice as caverns get) level has shrubs, Tower-caps, and Fungiwood. The announcement window will let you know you've found a downward passage even if you happen to discover it from the bottom.Ĭaverns will, from the topmost to the deepest, feature the following vegetation: Passages are natural tunnels connecting two layers by ramps and short, twisted tunnel sections. Magma pools can be distinguished from the magma sea even if they are only a single Z-level high due to two important features: they will always be walled by obsidian as opposed to the standard stone of the layer and, more importantly, will (very slowly) refill to their top if any magma is drained. A magma tube might extend all the way to the top cavern, or merely a few z-levels. Their shape is fixed and their presence random. Magma pools: Despite the name, magma pools are not actual pools, but tubes extending up from the magma sea.

This occurs because some stone in the cavern above the deep pit is unsupported and falls down. If your map has an unseen cave-in at the beginning of embark, the caverns may have a deep pit somewhere. The top z-level, where the pit meets the next cavern level, is un-muddied rough rock floor where the normal space of the deep pit and the random rock spires of the cavern collide. deep pits, that connect one cavern level to the next. When your dwarves discover a feature, an announcement window will let you know of it.ĭeep pits: Deep pits are.

Also, the top of a cavern may be higher than the rest of a cavern, so in practice there will be more levels than this.Įxploring the underground world, you may find a variety of special geographical features. Making this higher will guarantee at least this many levels to build your fortress, but will have no impact on how many z-levels thick the surface layer is. If you hit caverns too often then you can create a custom world with a higher number for 'Z Levels Above Layer 1' - Levels of stone above the first cavern layer. The average amount of water cavern layers feature depends on your world generation settings, specificallyīeneath the third layer lies the magma sea. This can range from a few pools at the bottom level to the whole layer being submerged, forming a gigantic underground sea, including fish and possibly camps of olm men and other fun aquatic creatures. The top of the first cavern usually resides about 10-11 z-levels below the surface.Įach cavern layer spans multiple z-levels, and is filled with water to a certain degree.