Ravine frequency can also be controlled. At higher settings, ravines spawn more frequently. Like with caves, a zero frequency disables them entirely.
Cave Control allows you to enable or disable the generation of various types of underground structures:
- Enable/Disable Mineshaft Generation
- Enable/Disable Dungeon Generation
- Enable/Disable Stronghold Generation
By default, all caves below layer 10 are filled with lava. Cave Control allows you to disable that feature, exposing the bedrock in the deep caves and generally making caving safer. However, mobs can spawn more frequently due to a lack of lava lighting, and it sharply reduces the amount of early-game lava available for obsidian, decoration, or fuel in tech mods.
Cave control also allows for deep caves to be filled with water instead. Note that this sharply reduces the density of those caves, as water-filled caves are not taken to be valid cave nodes by the generation algorithm.