Halo Asset Blender Development Toolset

The Halo Asset Blender Development Toolset is a set of add-ons for Blender which allows the import and export of JMS, animation data (e.g. JMA), ASS, and JMI for Halo 1, Halo 2, Halo 3 and Halo 3: ODST.


To download the add-on from GitHub, press the tags link next to the branch name on the top left. Switch to the release tab and download the latest release. The zip you want will be in the panel labeled Assets and will start with the name halo-asset-blender-toolset. There are two ways to install this Plugin:

Preferences menu

  1. From within Blender, select Edit > Preferences.
  2. In the window that appears, select the Add-ons menu and click the Community button.
  3. There now be an Install... button visible, which you should use to choose the .zip containing the downloaded add-on.
  4. Finally, ensure that the new add-on is checked in the add-ons list.

Manual installation

Firstly, you will need to find Blender's addons directory.

  • On Windows (Standalone Version), this can be found at %appdata%\Blender Foundation\Blender\<Blender Version>\scripts\addons.
  • On Windows (Steam Version), this can be found by right clicking Blender in Steam -> Manage -> Browse Local Files -> <Blender Version>\scripts\addons.
  • Linux users will find it at ~/.config/blender/<blender version>/scripts/addons.

Simply extract the downloaded .zip to this location so that the io_scene_halo directory is contained in addons.