Add Caverns Biome

[draegon1993]

• Description: Blow the planet's surface lies various networks of caverns of various sizes. On Rimworlds these caverns are often full of unexpected, and often dangerous, life. Due to the lack of sunlight, much of the life that grows here is fungal in nature, with creatures both large and small feeding off of it, and each other.
• Spawn: Entirely random. Fairly rare, not reliant upon moisture, temperature, etc.
• Special Features:
  • [ ] Entirely underground
  • [ ] Open area is tunnels and rooms
  • [ ] Roofs do not collapse outside of events (Such as Earthquakes, Raids, etc)
  • [ ] More Ores both deep and in walls
  • [ ] Very rare faction bases
• Weather: None?
• Normal Animals
  • [ ] Giant Snail (Large Herbivore, pack animal)
  • [ ] Royal Rhino Beetle (Large Herbivore)
  • [ ] Bovine Beetle (Large Herbivore, cow analog)
  • [ ] Crystal Crab (Large Omnivore, prefers plants/fungi over prey)
  • [ ] Moss Beetle (Small Herbivore)
  • [ ] Slugs (Small Herbivore)
  • [ ] Maxolotl, salamander (Large Predator)
  • [ ] Pale Lizard (Small Omnivore)
  • [ ] Pillbug (Small Omnivore, not a predator)
• Special Animals: These have unique behaviors or features that may or may not be implemented. They can be implemented as a normal animal first.
  • Slime (Medium Omnivore)
    • [ ] Implemented as normal animal
    • [ ] Eats any filth for food BEFORE trying to eat plants or animals
    • [ ] Acidic attacks (Damages parts over time like frostbite)
    • [ ] Never sleeps
  • Vampire Moth (Medium Predator)
    • [ ] Implemented as normal animal
    • [ ] Drinks Blood from animals without causing aggro
      • Spider (Large Predator, pack animal)
      • [ ] Implemented as normal animal
      • [ ] Highly venomous bite (One bite will usually down with toxic buildup)
      • [ ] Lives within a "den" with webbed floors and walls, only leaving for hunting.
      • [ ] Wraps prey to preserve them (Like a container it "builds")
• Event Animals: These animals come in rarely, through events.
  • Fruit Bat
    • [ ] Implemented as normal animal
    • [ ] Implemented as event animal
    • Jellypot (Small omnivore) (Shows up during infestations)
    • [ ] Implemented as normal animal
    • [ ] Sold by Exotic traders
    • [ ] Implemented as event animal
  • Vampire Bat (Small Predator)
    • [ ] Implemented as normal animal
    • [ ] Implemented as event animal
    • [ ] Drinks Blood from animals without causing aggro
• Flora and Fungi for initial Caverns release:
  • [ ] Shinecap (Brightly glowing fungus "fruit" tree)
  • [ ] Inkcap (Cloth-like fungus crop)
  • [ ] Starch Shroom (Hay analog)
  • [ ] Mortal Morel (Fungal medicine source)
  • [ ] Growable Glowstool (Initial cave crop, like potatoes, will need short grow time)
  • [ ] Dulci Mushroom (Berry analog)
  • [ ] Mushroom "trees" (Give Fungal logs, pale white "wood-like" material)
  • [ ] Mushroom "grass" (Tiny mushroom clusters that grow very fast and spread fast)
  • [ ] Sunbulb (Grows a living sun lamp essentially, decays over time like glow pods)