CurseForge · Minecraft mod
TFC Eratosthenes
The world is spherical, as it should be.
Quick answer
Which TFC Eratosthenes release should I use?
TFC Eratosthenes tfc_eratosthenes-NeoForge-1.21.1-4.0.0.jar targets 1.21.1 with NeoForge. The project page does not say whether this file belongs on the client, dedicated server, or both. All 2 required mods have matching files.
Where it goes
Is TFC Eratosthenes required on the client, server, or both?
The project page does not say whether this file belongs on the client, dedicated server, or both.
The source does not explicitly classify this release as client-only or server-only.
What else does TFC Eratosthenes tfc_eratosthenes-NeoForge-1.21.1-4.0.0.jar need?
tfc_eratosthenes-NeoForge-1.21.1-4.0.0.jar. Change the file and its required mods may change too.
Install TerraFirmaCraft, Patchouli first. We found matching files for this game-version and loader setup. 2 come through another mod in the chain.
2 extra mods were pulled in by other dependencies. Indented rows show who needs each one. We only count dependency files that match this setup. A file for another loader does not fill the gap.
Before you install it
Add TFC Eratosthenes without breaking your instance.
Built for TFC Eratosthenes tfc_eratosthenes-NeoForge-1.21.1-4.0.0.jar. Pick another file and the loader, install side or required mods may change.
- 01
Stick to this file
Use tfc_eratosthenes-NeoForge-1.21.1-4.0.0.jar. It targets 1.21.1 with NeoForge; another release may have different loader, side or dependency requirements.
- 02
Bring the mods it needs
Install TerraFirmaCraft, Patchouli first. We found matching files for this game-version and loader setup. 2 come through another mod in the chain.
- 03
Put it on the correct side
The project page does not say whether this file belongs on the client, dedicated server, or both.
- 04
Pick the file you checked
Use the “Get this file” button beside tfc_eratosthenes-NeoForge-1.21.1-4.0.0.jar. It opens that exact file at the source.
About this project
What does TFC Eratosthenes add?
TFC Eratosthenes
In 240 B.C., Greek scholar Eratosthenes calculated the Earth’s circumference to be roughly 25,000 miles, providing early proof of its spherical shape. With modern technology and the amazing world generation in TerraFirmaCraft we are able to recreate this in Minecraft.
Features
- You can now sail around the world!
- Modifies TerraFirmaCraft world generation to be shaped to fit the Craster Parabolic map projection.
- Preventing islands hotspot volcanoes from spawning outside the "world".
- When crossing the 180° meridian westwards or eastwards you(and your boat or horse) will be teleported to the corresponding coordinates on the other side.
- Special handling around the poles to prevent glitches.
- Support for TFC Real world and the Equal Earth projection.
- Support for aleki's Nifty Ships and Firma: Civilization (only 1.20.1).
Tips
- If you use Distant Horizons together with this mod you can set the "Earth Curve Ratio" to 160.
- This value is for the default Temperature Scale of 20km. You will find this setting under world generation.
- If you double the Temperature Scale you can half this value, and the other way around.
- This value is for the default Temperature Scale of 20km. You will find this setting under world generation.
Q & A
- Question: Is this safe to add to an existing world? <br> Answer: It should be safe as long as you have not explored near the "edge of the world", There might be some weirdness if these chunks already exists.
- Question: Do I need TerraFirmaCraft(TFC) to use this mod? <br> Answer: Yes, it fetches data about world size from TFC and modifies TFC's world generation. It uses the temperature scale value.
- Question: Do I need this on both the server and client? Answer: It's required on the server, and optional on the client. Only needed on the client if you want the overlay of current coordinates.
Project description from CurseForge.
Pick your setup
TFC Eratosthenes by Minecraft version and loader
Choose the version and loader you play, then open the matching release.
1.21.1
1 loader build1.20.1
1 loader buildCheck the dependencies, then try the file in a copied instance before changing a world you care about.
Recent files
TFC Eratosthenes versions and loaders
tfc_eratosthenes-NeoForge-1.21.1-4.0.0.jar
14 Aug 2026
tfc_eratosthenes-Forge-1.20.1-3.0.0.jar
14 Aug 2026
tfc_eratosthenes-NeoForge-1.21.1-0.2.2.jar
11 Aug 2026
tfc_eratosthenes-NeoForge-1.21.1-0.2.1.jar
23 Mar 2026
tfc_eratosthenes-NeoForge-1.21.1-0.2.0.jar
15 Mar 2026
tfc_eratosthenes-Forge-1.20.1-0.1.1.jar
10 Feb 2026
tfc_eratosthenes-0.1.1.jar
6 Feb 2026
tfc_eratosthenes-0.1.0.jar
5 Feb 2026
Looking for an older file? The official CurseForge project page is in Resources.