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Nether Bedrock Cracker

Cracks nether seeds from bedrock. This works in versions 1.18 and above since bedrock became seed dependent in that release. The overworld uses a different RNG, so the calculations used here are not applicable. example screenshot of the app

Usage

To use the Nether Bedrock Cracker, follow these steps:

  1. Download the application for your system from the releases page.
  2. Open the downloaded application.
  3. Collect bedrock positions from both the nether floor and the nether roof.
    • Collect data from both the floor and the ceiling. Gathering data from only one side will result in drastically more results for the same number of data points!
    • Focus on collecting bedrock data on y-level 4 or y-level 123, as bedrock is rarer in those layers, providing more valuable information per block.

After gathering the required data, you have two options:

  1. Run the cracker and view the cracked seeds in the graphical user interface (GUI).
  2. Run the cracker and save the found seeds to a file.

Advanced

You can use this tool to filter a seed list via bedrock positions. Simply load the list via the "Load seed list" button. Seed lists are text files where each seed is on a new line. Click here to view the format

Known Issues

PaperMC Servers

PaperMC had a bug in their code that caused slight differences in bedrock generation. If you encounter a situation where your bedrock is shaped in pillars, similar to the bug report, switch the crack mode in the GUI from "Normal" to "Paper < 1.19.2-213."

Old Nether

If your nether was generated in a version older than 1.18, you can use the fungus cracker of SeedcrackerX to crack the seeds.

User specified seeds

If the world-seed-search mode finishes with a false or no seed at all and the structure-seed-search mode found a structure seed then it's most likely that the servers world seed wasn't generated by the game but manually specified by the admin. Check this website to figure out how.

Building from Source

If you prefer to build the application from source instead of downloading it from the releases page, follow these steps:

Prerequisites

Windows

You will need to install Microsoft Visual C++. MSVC is bundled with Visual Studio, but if you prefer a standalone installation, you can download it from: https://visualstudio.microsoft.com/visual-cpp-build-tools/

Building

  1. Install Rust.
  2. Download the repository.
    • Click the green button above to download the repository as a zip.
    • Unzip the downloaded file on your computer. Advanced users may prefer cloning the repository instead.
  3. Open a terminal in the unzipped directory.
  4. Run the command cargo build --release.
  5. The executable should now be located at /target/release/bedrock_cracker.