Mythica - A second overworld Dimension

Mythica - A second overworld Dimension

A small mod that adds a copy dimension of the overworld

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542 Downloads
neoforgeadventuretransportationworldgen
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About this Mod

Mythica

Minecraft Versions
Server Side
License

Now Compatible with Terrablender Biomes!

Biomes added by Terrablender are copied to Mythica by default, but can be set to be ignored, or removed from the overworld in favor of mythica.

You can now sleep in mythica

Try my other mod interdimensional-sleeping to allow sleeping and skipping nights in mythica.

Overview

This mod adds a new dimension, "Mythica" to the game.
The Mythica Dimension is basically an another Overworld with a different seed(configurable).
This Mod adds 1 item, the Mythic powder.
By default, right-clicking inside a portal frame made of reinforced deepslate, like those generated in Ancient Cities will spawn a portal to the Mythica Dimension.
The Mythic powder has no built-in recipe, please use the command or add a recipe yourself.

Configuration

It is recommended to add a recipe or a loot table to obtain the Mythic powder using Datapacks.
The tag #mythica:portal_frame_blocks defines the blocks usable for portal frames,
and #mythica:portal_replaceable the blocks that can be replaced when a portal is generated inside the frame.
Check the common config to set the blocks used when an exit portal is generated.
Terrablender-added overworld biomes can be set to copied to Mythica, ignored, or added to mythica and removed from the overworld.
Regions can be blacklisted from copying by their namespaces, and biomes by their names.
The dimension which mythica portals can be created in can be also configured, defaulting to the Overworld.~~~~
The world seed used in mythica dimension can be configured in the server config file.

Integration

Create:

The Mythica Portal works with Create trains, allowing the rails to connect through the portal and the train to pass through.

TerraBlender:

Allows for copying/transferring TerraBlender-added biomes from the Overworld to Mythica.

Bonus

The mod includes a datapack which generates mythica-namespaced biomes in place of vanilla ones.
Use the command /datapack enable "mod/mythica:use_mythica_biomes" and re-start the world to apply.
Doing so will give you more control over what content are added to mythica/overworld separately.
The datapack also adds the mythica biomes to some vanilla biome tags, but not to those enabling ruined portal and stronghold generation.
(this was done considering nether/end return portals not taking you back to mythica, but rather the overworld. Feel free to add the tags yourself).
Do note that some mods adds duplicates of vanilla biomes to the overworld, and those may be copied over to mythica. Blacklist the mod/biome to prevent this from happening.
Typical examples are: minecraft:river, minecraft:frozen_river and minecraft:stony_shore.

Alternatively, you can cherry-pick some biomes to replace the overworld variants using your own datapack.
see data/mythica/worldgen/biome for available biomes.

Credits

Portal code adapted from quek04/undergarden
Terrablender compat code adapted form RazorDevs/Aeroblender,
Sound effects by OtoLogic and soundeffect-lab

Available Versions

mythica-neoforge-1.6.1+mc1.21.1release
MC 1.21.1neoforge
May 31, 2026
mythica-neoforge-1.6.0+mc1.21.1release
MC 1.21.1neoforge
April 4, 2026
mythica-neoforge-1.5.0+mc1.21.1release
MC 1.21.1neoforge
January 26, 2026
mythica-neoforge-1.4.1+mc1.21.1release
MC 1.21.1neoforge
November 29, 2025
mythica-neoforge-1.4.0+mc1.21.1release
MC 1.21.1neoforge
November 3, 2025

How to Install Mythica - A second overworld Dimension on Your Server

1

Order Server

Order a Minecraft Java server with at least 4 GB RAM (6 GB recommended).

2

Set neoforge Loader

In the panel under "Egg", select the neoforge loader and matching Minecraft version (1.21.1).

3

Install Mod

Open the mod browser in the dashboard and search for "Mythica - A second overworld Dimension". Click "Install" – done! Alternatively, upload the .jar via SFTP to the /mods folder.

Compatibility

Mod Loaders

neoforge

Minecraft Versions

1.21.1

Server-side

Required

Recommended RAM

6 GB(min. 4 GB)

Frequently Asked Questions

Mythica - A second overworld Dimension server crashes on startup – what to do?

Most common cause: wrong neoforge version or insufficient RAM. Check the server log (latest.log) for "OutOfMemoryError" or "Mixin" errors. With Mado Hosting: ensure at least 4 GB RAM is allocated and the loader matches the mod version (1.21.1). You can switch loaders with one click in the panel.

Is Mythica - A second overworld Dimension compatible with neoforge?

Mythica - A second overworld Dimension officially supports neoforge for Minecraft 1.21.1. The Mado dashboard automatically detects incompatible loader combinations.

Server lagging with Mythica - A second overworld Dimension – how to optimize performance?

Recommended RAM: 6 GB (per 5 players). Use /spark profiler to check if Mythica - A second overworld Dimension consumes the most tick time. Common fixes: reduce server view-distance to 8-10, install "performant" or "starlight" as supplementary mods on Forge. With Mado Hosting, your server runs on NVMe SSDs with dedicated CPU cores for minimal latency.

Rent Modded Server

Install Mythica - A second overworld Dimension with just one click on your server.

Recommended RAM
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Min. 4 GB | +1 GB pro 5 Spieler
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Details

License
GNU Lesser General Public License v3.0 or later
Server-side
Required

Supported Versions

1.21.1