Minecraft mapping and rendering tool
Java Perl
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llbit [Launcher] Default option to fix JavaFX on Windows
There is a problem with JavaFX rendering on Windows 10 that causes the
Chunky window to be rendered blank when using the hardware JavaFX
renderer. We work around this by adding -Dprism.order=sw to the default
Java options for launching Chunky on Windows.
Latest commit a01e9fa May 1, 2018



Chunky is a Minecraft mapping and rendering tool.

Quick links:

Copyright & License

Chunky is Copyright (c) 2010-2017, Jesper Öqvist jesper@llbit.se

Permission to modify and redistribute is granted under the terms of the GPLv3 license. See the file LICENSE for the full license.

Chunky uses the following 3rd party libraries:

  • Markdown by John Gruber. Markdown is covered by the Modified BSD License. See the file licenses/Markdown.txt for the full license and copyright notice.
  • Apache Commons Math library by the Apache Software Foundation. The library is covered by the Apache License, version 2.0. See the file licenses/Apache-2.0.txt for the full license text. See the file licenses/commons-math.txt for the copyright notices.

Launching Chunky

Chunky uses a lot of memory. If Chunky has too little memory to work with it may slow down to a crawl or crash. The memory limit can be increased in the Chunky Launcher.

Rendering using the command line (Headless Mode)

It is possible to render a scene from the command line. First set up a scene using the GUI. Don't forget to save the scene. Then run the following on the command line:

java -jar chunky.jar -render SceneName

Where SceneName is the name of the scene to render. You can read more about headless rendering here.

Shutdown when render completes on Unix-like Systems (Mac OS X, Linux, BSD)

In the Advanced tab of the Render Controls window, you can check the checkbox that says "Shutdown when render completes" to shut down your computer when the set SPP target is reached. (This can be toggled while rendering.)

On Unix-like systems, the shutdown terminal command has to be run as root using sudo. For various reasons, Chunky cannot prompt for the password to sudo, so you must configure your system to allow the command to run without a password.

Open a terminal (such as bash) and run sudo visudo, providing your password.

Add the following line at the end of the file: (press Insert to type)

%user_name ALL=(ALL) NOPASSWD: /sbin/shutdown

Replace user_name with your username.

Press Escape, then type :wq.

You may need to restart or log out and in for this to take effect.

This will only allow sudo shutdown to run without a password; no other commands run with sudo will be affected.

Hacking on Chunky

To build Chunky you will need Apache Ant and Perl. Chunky is built using an Apache Ant build script found in the project root directory. The dist target builds Chunky and outputs binaries to the build directory.

Chunky is split into four projects:

  • chunky - main Chunky project
  • lib - common code required by the other projects
  • launcher - the launcher
  • releasetools - Ant task for building releases

If you want to hack on Chunky itself you will need to set up two projects. Eclipse project files for chunky and lib are included. It should be fairly simple to set those up in Eclipse. You will need to add a dependency from chunky to lib.

Code Style

The Google Java style guide should be followed for new code (2 spaces for indentation, no tabs). If you want to contribute code to Chunky please make your code look similar to the rest of the code, and refer to the style guide when in doubt.

Additional Information

More information about Chunky, including a short getting started guide and rendering tips are available at the Chunky Documentation page.