Omen was the first widely used level editor for Minecraft, used to edit Classic and Indev worlds in 2009 and 2010.
It was developed by osici and initially was called Osici's Minecraft Editor, or OME. The different versions are collected on this page along with information about running Omen.
Omen has not been updated since 2010 but the original downloads are still available:
| Version | Release Date | Supports |
|---|---|---|
| Omen 0.7.0 | Feb 7th 2010 | Indev (.mclevel), Classic (.dat and .mine) |
| Omen 0.6.0 | Dec 2nd 2009 | Classic |
| Omen 0.5.0 | July 19th 2009 | Up to Classic 0.0.23a_01 |
| OME 0.4.1 | June 23rd 2009 | Up to Classic 0.0.23a_01 |
| OME 0.4.0 | June 22nd 2009 | Up to Classic 0.0.23a_01 |
Versions 0.1.0 to 0.3.0 exist but were never released.
Omen requires Java. It is multiplatform and works on Windows, macOS and Linux.
It also requires a Minecraft Classic jar to save Classic levels. This should be on your java classpath - placing it in the same directory as Omen should work.
Omen can be run by clicking on the jar, but it is a good idea to run it with more memory allocated. From the command line:
java -Xmx1024m -cp Omen070.jar net.minecraftforums.osici.OmenThis runs Omen 0.7.0 with 1024MB of memory - you can adjust this as necessary. A .bat file is included that can be run on Windows.
Omen is an editor that allows you to edit worlds in a Paint-like way with 2d slices of the world acting like a canvas using editing tools that operate in both 2d and 3d. The main editing panel is on the left. On the right is the currently selected block type, and below this are tabs with various tools.
Below the canvas is the navigation bar. In addition, the mouse wheel can be used to cycle through layers in each view. Pressing 'o' toggles between showing only the current layer and an overview of the whole map.
Omen was released at a time when Minecraft only generated a single kind of map, so it included a number of world generators that were used to create alternative terrain for classic servers.
New maps can be generated using the New... option under the File menu, where there are options to configure the different generators as well as blank and flat maps.
Omen 0.7.0 supports reading a custom block list from a config file. The columns are the numerical block id, name, RGB components of the block colour, and whether to use the block when importing images. Icons should be placed a folder named icons and named with the numerical block id.
The original Minecraft forums thread is no longer available but can be found via the wayback machine here or here. A basic user guide written by a forums member is still available.
The old Omen tumblr is also archived on the wayback machine.
