TFCGenViewer
TFCGenViewer adds a More tab to the world creation screen, where a TerraFirmaCraft world can be previewed before it is created.
What it does
The extra tab holds a preview button that generates an image of the TerraFirmaCraft world for the current configuration, and the image updates each time the preview is run. Settings such as continentalness and an empty seed are kept when the player leaves the tab and returns, so the configuration is not lost while the preview is being examined. Returning to the More tab does not save any world configuration, so nothing changes until the world is actually created.
The mod is built for TerraFirmaCraft, which must be installed alongside it, and runs on Forge and NeoForge for 1.20.1 and 1.21.1. Because the environment is client and server, both the server and every player need the mod for the preview to match the world that is created. The code is open source under the MIT License, and public links to the source, issue tracker and wiki are available.
Key features
World preview image
Generates a preview of the TerraFirmaCraft world for the settings chosen on the creation screen.
Current seed display
Shows the seed that was previewed, and a button copies it to the clipboard.
Configuration kept between visits
Continentalness, empty seed and other settings survive leaving and returning to the More tab.
Extra configuration buttons
Four further buttons on the More tab adjust the preview settings before it is generated.
Compatibility
Latest build for each game version and loader.
Only full game releases are shown. This mod publishes no snapshot builds.
Requirements
Dependencies declared by the latest file for each loader.
Required 1
Use cases
Checking a seed before play
A player can preview a TerraFirmaCraft world before committing to it, and copy the seed to share or reuse it later.
Tuning generation settings
Adjusting continentalness and other options on the More tab shows how the terrain changes before the world is created.
Who it’s for: Players creating TerraFirmaCraft worlds on Forge or NeoForge, and server owners who want players to see the generated terrain before they start a world.
How it compares
Seeds Filtering is client and server, open source under the MIT License, and covers Forge and NeoForge for 1.20.1 – 1.21.1, so it is the closest match in loaders and versions. World Preview TFC is a NeoForge client-side only mod for 1.21.1 under the Apache License 2.0, so it needs no server install but supports only NeoForge. Seed Viewer is client-side only under the MIT License but is not open source, and it covers Fabric and NeoForge.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| TFCGenViewer | Forge and NeoForge | 1.20.1 – 1.21.1 | Client and server | 2026-08-19 |
| Seeds Filtering | Forge and NeoForge | 1.20.1 – 1.21.1 | Client and server | 2026-07-27 |
| World Preview TFC | NeoForge | 1.21.1 | Client-side only | 2026-07-10 |
| Seed Viewer | Fabric and NeoForge | 1.21.1 – 26.2 | Client-side only | 2026-07-17 |
Questions
Does TFCGenViewer need TerraFirmaCraft?
Which loaders does TFCGenViewer support?
Does the server need TFCGenViewer installed?
In the catalog
TFCGenViewer is one of 8,515 World generation mods on ModsFinder, and one of 5,058 World generation mods for Forge. 32,366 mods support Minecraft 1.21.1.
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What the author says
Adds an additional button to the "More" tab of the world creation screen, which opens a preview of the world to be created This preview has several buttons for configuring the preview. In addition to the configuration options there are four other buttons
Official listing
- Modrinth page
- modrinth.com/mod/tfcgenviewer
- Owner
- Notenoughmail
- Published
- 2024-07-12
- Updated on Modrinth
- 2026-08-19
- Facts verified
- 2026-10-15