Understanding the FlatBedrock Xplosion's Edition Mod
If you have ever spent hours digging down to bedrock only to find a chaotic, jagged mess of blocks, you know how unsatisfying the vanilla generation can be. The FlatBedrock Xplosion's Edition mod steps in to clean up that final layer, replacing the rough bedrock with a perfectly flat surface. Whether you are building massive underground bases or simply appreciate a tidy world, this mod delivers a polished finish to the lowest reaches of your Minecraft dimensions.
What Exactly Does the Mod Do?
By default, FlatBedrock Xplosion's Edition flattens the bedrock layer at the bottom of the overworld and both the floor and ceiling of the Nether. Instead of the usual uneven bedrock pattern, you get a clean, level layer that makes mining and navigation far more pleasant. The mod also gives you full control over which dimensions are affected, and you can even replace the bedrock with a different block entirely.
The mod operates through a simple JSON configuration system. It reads dimension-specific files to decide whether to generate a flat top layer, a flat bottom layer, or both. This makes it incredibly lightweight and compatible with a wide range of modded dimensions, as long as they use standard world generation methods.
How the Configuration Works
After installing the mod and launching the game once, a configuration folder is created at /config/flatbedrock/dimensions/. Inside you will find two default files: overworld.json and nether.json. Each file follows a simple structure:
- dimID – The numerical ID of the dimension (1 for the overworld, -1 for the Nether).
- genTop – Set to true to generate a flat layer at the top of the dimension (like the Nether roof).
- genBottom – Set to true to flatten the bottom bedrock layer.
- retroGenTop / retroGenBottom – When enabled, these retroactively flatten bedrock in already-generated chunks (more on this later).
- fillBlock – The block used to replace bedrock. For the overworld it defaults to
minecraft:stone, but you can use any valid block identifier.
For example, a typical overworld configuration looks like this:
{
"dimID": 1,
"genTop": false,
"genBottom": true,
"retroGenTop": false,
"retroGenBottom": false,
"fillBlock": "minecraft:stone"
}This tells the mod to flatten only the bottom layer of the overworld, leaving the top untouched, and to use stone instead of bedrock. The Nether file is similar but often has genTop set to true to flatten the roof.
Adding Support for Modded Dimensions
One of the most powerful features is the ability to add flat bedrock generation to any modded dimension. If you have a mod that adds a new realm—like the Twilight Forest or the Aether—you can create a new JSON file in the dimensions folder. Simply name it something descriptive, such as twilightforest.json, and fill in the correct dimension ID. For Twilight Forest, the ID is 7, so the file might contain:
{
"dimID": 7,
"genTop": false,
"genBottom": true,
"retroGenTop": false,
"retroGenBottom": false,
"fillBlock": "minecraft:stone"
}After saving the file, the next time you load that dimension, its bedrock will be flattened according to your settings. Note that some mod authors may already include a default config, so it is worth checking the dimensions folder after the first launch before creating your own.
For those who prefer a streamlined modding experience, you can easily install FlatBedrock Xplosion's Edition through the foxygame.net launcher. This modern launcher lets you browse and download mods directly from its menu, making it a convenient and flexible way to keep your game up to date without manual file juggling.
Retroactively Flattening Existing Worlds
If you already have a world with hours of progress, you do not need to start over to enjoy flat bedrock. The mod supports retroactive generation, but with an important caveat: always back up your world first. To enable this, open the dimension’s JSON file and set retroGenBottom or retroGenTop to true. When you load the world, the mod will scan existing chunks and replace the bedrock with your chosen fill block, leaving you with a pristine flat layer.
This feature requires UniversalCore to be installed alongside FlatBedrock. UniversalCore adds the necessary retro-generation utilities and also enables a version checker, keeping you informed of updates. Without it, the retroactive options will simply be ignored, and only newly generated chunks will be flattened.
Compatibility and Extra Tips
The mod works on Minecraft 1.9.4 and is fully compatible with 1.10. For older 1.7.10 setups, the same logic applies, though UniversalCore is recommended to unlock retro-gen and version checking. Mystcraft dimensions are not supported due to their unique generation system, but the author has expressed interest in adding compatibility in the future.
Modders can also register their dimensions programmatically using IMC messages, making it easy for pack developers to include pre-configured flat bedrock support without requiring users to edit JSON files. This flexibility has made FlatBedrock Xplosion's Edition a staple in many modpacks that prioritize clean world generation.
Why You Should Try It
FlatBedrock Xplosion's Edition is a small but impactful utility mod that solves a persistent aesthetic and practical annoyance. The flat layers make large-scale excavation projects look professional, simplify mob farm construction at bedrock level, and just feel right. With its lightweight config system and broad compatibility, it fits seamlessly into almost any modded or vanilla-plus setup.
Give it a try, tweak the fill blocks to your liking, and finally enjoy a bedrock layer that matches the rest of your orderly Minecraft world.