FTB Structures (Forge)
Modby FTB
Adds barrels, loot crates, new biome source type and randomly spawning structures in world
Description
This mod won't work without previous setup! Please see the wiki on how to do that.
This mod does a couple things:
1) It lets you create structures to spawn in world from structure block nbt files. Examples:

2) Adds a new biome source - ftbstructures:island_grid
It creates rings of biomes around configurable distances (typically meant for places where Team Islands spawn) and it looks something like this: 
3) Adds barrels and crates

Recommended Gear
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