Modern Beta Forge Islands
by b3spectacled
Modern Beta Forge Islands adds island generation to Modern Beta worlds on Forge 1.12.2, with presets and settings for island size, shape and ocean transitions.
What it does
Choosing a preset from the Modern Beta world customization screen gives a fast start with an island world, and individual settings can be adjusted to set how large islands are, their shape, and how smoothly they fade into the sea. The Xbox Legacy inspired early TUs style and the Waterworld setting are among the presets, and a world can begin on a small island and expand out into the seas for resources.
The mod requires Modern Beta Forge on the same side as itself, so it has to be installed on the server and on every client. Set the levelType field to modernbeta, then supply the generator settings string, which can be built with the in-game GUI. The mod is published for Forge 1.12.2 only, with the 1.12.2-1.10.0.1 file as the latest build, and the code is open source under the MIT License.
Key features
Island world presets
Ready-made presets in the Modern Beta customization menu produce island worlds without manual tuning.
Adjustable island shape
Settings control island size, shape and how gradually an island transitions into the ocean.
Survival and Waterworld starts
A small island start suits survival play, while the Waterworld option leads players to venture out across the seas.
Generator options string
The generator settings field can be filled from a string built with the in-game GUI, applied through server.properties.
Gallery
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
Server island worlds
Server owners set levelType to modernbeta and apply a preset in server.properties to host island worlds for their players.
Single-player island survival
Players start on a small island with the Survival Island preset and expand outward as they gather resources.
Who it’s for: Players and server owners who want island worlds on Forge 1.12.2 with Modern Beta world generation.
How it compares
Survival Island is a separate Forge and Fabric option that runs server-side only and covers 1.19.2 – 1.21.1, so it does not overlap with 1.12.2. Moderner Beta also uses Modern Beta generation but targets a server-required setup across 1.20 – 26.3 on several loaders. Floating Island Revived is client and server, MIT licensed and covers Fabric and Forge for 1.12.2 – 1.21.8, giving it the widest version reach among the options listed.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| Modern Beta Forge Islands | Forge | 1.12.2 | Client and server | 2026-09-13 |
| Survival Island | Fabric, Forge and NeoForge | 1.19.2 – 1.21.1 | Server-side only | 2025-09-10 |
| Moderner Beta | Fabric, Forge, NeoForge and Quilt | 1.20 – 26.3 | Server required, client optional | 2026-09-15 |
| Floating Island Revived | Fabric and Forge | 1.12.2 – 1.21.8 | Client and server | 2025-08-27 |
Questions
Does Modern Beta Forge Islands need Modern Beta Forge?
Which game version does the mod support?
Does the server need the mod installed?
In the catalog
Modern Beta Forge Islands is one of 8,515 World generation mods on ModsFinder, and one of 5,058 World generation mods for Forge. 2,920 mods support Minecraft 1.12.2.
More from b3spectacled
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What the author says
An add-on for Modern Beta Forge for 1.12.2 (versions 1.8.0.0 or later) which adds island generation for Beta, Alpha, Infdev 20100611, and Pocket Edition terrain generators. Now featuring improved generation as compared to the original Fabric Modern Beta.
Official listing
- Modrinth page
- modrinth.com/mod/modern-beta-forge-islands
- Owner
- b3spectacled
- Published
- 2026-04-05
- Updated on Modrinth
- 2026-09-13
- Facts verified
- 2026-10-15