Upgrade Underground

Upgrade Underground is a lightweight Vanilla+ cave-overhaul mod designed to add more subterranian content. It introduces an new biome, essential underground survival items, deeper progression mechanics, and unique structures to discover while mining.

Lichen Garden

A frequent underground biome overflowing with life.

Lichen Vegetation: Lichen Sprouts, Tall Lichen Sprouts, and Lichen Mushrooms.

!Lichen Vegetation

Lichen Wood: Chop down Lichen Trees to gather exclusive Lichen Wood and Lichen Leaves for building.

!Lichen Wood !Lichen Wood2

Glow Lichen Cap: A handy early-game helmet made from a Leather Helmet, a Lichen Mushroom, and 2 Lichen Sprouts. It provides 1 Armor and acts as a portable light source (Level 5 light in a 3x3x3 area).

!Lichen Cap

Lichen Mushrooms: A new cave food source. Cook them to save yourself from eating rotten flesh! They smelt faster, though they provide low saturation.

!Cooked Lichen Mushroom

Jellyshroom Caves

!Jelly Caves

Jelly Blocks

!Jelly Blocks

Jelly Block

Main Filler Block. !Jelly Block

Polished Jelly Block

Slippery Building Blocks. !Polished Jelly

Jelly Spike

Slow you down on contact. !Jelly Spike

Jelly Spire

Slow down on contant like Jelly spikes. !Jelly Spire

Underground Structures Keep your eyes open while exploring. You can now stumble upon two small structures.

Lichen Hut: A small abandoned shelter containing starter loot. High chance to find Coal, Torches, Lichen Mushrooms, and even enchanted Axes or Pickaxes.