Preventing Cavern Spawn

[2 Zons]

Is it such a thing, or do creatures come in from the edges of the map in the caverns just like on the surface? I'm wondering if I can make an area of the caverns safe and part of my fortress. If creatures spawn in random areas, is there a way to prevent it, or claim the area?

[pezenwever]

I've had rodent men invasion spawning in the middle of the map.

[DoubleG]

There may be some bugs with mobs spawning far from the edge of the map, but usually they will come in from the sides. They should be able to wall them off or wall of a "safe area"

[Uncle Benser]

You can stop cavern dwellers from spawning in the settings. All other cavern inhabitants are like wildlife, I think.

[Tron]

In my current fort i have zero wildlife in the caverns layers (all 3), but i get dwellers and FBs. I think i embarked on a joyous wilds or mirthful biome, could it be related ?

[Baronfuming]

Build a wall around the edges of the cavern layer. Do it one 'layer' at a time. Make sure to check if there is open space at the z-levels above, since some enemies can climb or fly.

To make a wall 3 z-levels high, I've been making a wall 3-squares wide. Start with the wall closest to the edge of the cavern map, but not right up against. I leave 1 square as a 'buffer' to get enemies stuck in. Build that first wall, then build another wall 'behind' it, and then a 3rd wall once that is finished.

Next, build a ramp in front of the closest wall to the interior. This will allow your dwarves to access the top of the walls you build. Go 1 z-level up, and build another line of wall closest to the edge, followed by a second one 'behind' it. Then build another ramp and repeat with the next z-level until there are no open spaces accessible from the edge of the cavern.

Hopefully this will protect your dwarves from the scary enemies.