FTB Structures (Forge)
World generation in Minecraft is one of the most powerful tools a pack developer has, but vanilla options are surprisingly limited once you move past villages and temples. That is exactly the gap FTB Structures (Forge) fills. This add-on gives modpack creators and map makers direct control over where structures appear, how biomes are arranged, and what loot containers players find along the way. If you have ever wanted a modpack where every island feels deliberately placed rather than randomly scattered, this is the tool you have been looking for.
Before you dive in, keep one thing in mind: this mod will not function on its own. It requires prior setup, and the official wiki walks you through the configuration steps you need to complete first. Skipping that step is the most common reason players report the mod "not working."
What FTB Structures (Forge) Actually Does
The add-on focuses on three core features, each aimed at a different part of world generation.
1. Spawning Structures from NBT Files
The headline feature is the ability to place structures in your world using structure block NBT files. Instead of relying on hardcoded vanilla generation, you can export a build from a structure block, drop the file into your pack, and have FTB Structures (Forge) for Minecraft spawn it during world generation. This opens up enormous possibilities:
- Custom dungeons and ruins tailored to your modpack's theme
- Hand-built villages or outposts that appear at controlled intervals
- Themed landmarks that anchor exploration and give players something to hunt for
- Reusable templates you can share across multiple packs
Because the structures come from NBT files, you are not locked into any particular building style. Whatever you can assemble in creative mode, you can turn into a generated feature.
2. The Island Grid Biome Source
The second major addition is a new biome source called ftbstructures:island_grid. This source generates rings of biomes around configurable distances, which is ideal for skyblock-style or team-island maps where each player or group needs their own isolated starting area.
Rather than letting biomes scatter randomly, the island grid arranges them in predictable rings. That predictability matters a great deal in competitive or cooperative multiplayer, because every team gets a comparable environment. You can tune the spacing to match the size of your islands, so players are never accidentally sharing terrain or spawning on top of one another.
3. Barrels and Crates
Finally, the mod introduces barrels and crates as new container blocks. These give pack authors more flexibility when designing loot tables and starter kits, and they fit naturally into the structure generation system. A custom dungeon can reward players with a crate instead of a vanilla chest, which instantly makes the pack feel more polished and distinct.
Supported Versions and Loader
FTB Structures (Forge) is built for the Forge mod loader, as the name suggests. It has been maintained across several major Minecraft releases, including the 1.16 and 1.18 eras, with builds targeting 1.19 and 1.20 available as well. Because the mod hooks deeply into world generation and biome sourcing, version compatibility matters more than usual. Always confirm that the build you pick matches both your Minecraft version and your Forge version, and check that any dependent FTB libraries are installed alongside it.
If you would rather skip the manual file juggling, the foxygame.net launcher offers a one-click install path that handles the correct Forge version and library dependencies for FTB Structures (Forge) automatically, which removes most of the guesswork from setting up a pack.
How to Install FTB Structures (Forge)
Installation follows the standard Forge mod workflow, but the setup requirement makes it slightly different from a plug-and-play mod.
- Install the correct Forge version for your target Minecraft release.
- Place the mod file and any required FTB library dependencies into your mods folder.
- Launch the game once so the configuration files generate.
- Read the official wiki and complete the required setup before expecting structures to appear.
- Add your NBT structure files and adjust the island grid settings to suit your map.
When you download FTB Structures (Forge), grab it from a trusted source and double-check the file version against your pack. Mixing versions is the fastest way to get a crash on world load.
Final Thoughts
FTB Structures (Forge) is a specialist tool, and it rewards players who treat it that way. It is not the kind of mod you drop in and forget about. It is the kind you study, configure, and then use to build something genuinely memorable. For modpack authors who want precise control over structure placement and biome layout, it remains one of the most useful add-ons in the FTB ecosystem. Do the setup, read the wiki, and you will have world generation that behaves exactly the way you designed it.