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Please ensure that you have installed all required tools before starting.

1. Create a map config

To start, use the Create a Map Configuration from the home screen.

The actions is also available in File menu, New, Arma 3 Map Config.

2. Select area with the map

First zoom and move to the wanted area. Like most map tools : use mouse wheel to zoom to the wanted area, and mouse left button to move.

Please note that:

• Area must be square
• Area size should not exceeed 84x84km

Option 1 : Select from center

You can select an area from it's center. Press Alt key, then press mouse left button on the center, then while pressing mouse left button move the mouse to create a square around wanted area. When the square does the wanted size, release mouse button (it must remain within map).

Option 2 : Select from a corner

You can select an area from a corner. Press Ctrl key, then press mouse left button on on of the corcer, then while pressing mouse left button move the mouse to the opposite corner to create a square around wanted area. When the square does the wanted size, release mouse button (it must remain within map).

3. Generate

A default asset configuration is selected when you create a map (CentralEurope), so you can directly generate a mod.

Builtin asset configuration, CentralEurope (and Sahel) requires Arma Realistic Map Assets V2 . Generation process will fail if you have not subscribed to this mod.

You will probably prefer create an asset configuration more suitable to your map region, see Create an asset configuration for Arma 3 for instructions.

Use the button "Generate Mod for Arma 3" (Mikero's Pbo Project is required for this action), wait some minutes (or hours if you have picked a very large area).

When it's done, a window will popup. You can choose to open Arma 3 Launcher.

In the launcher, in Mods, pick the configuration that have been generated.

You can then head to Eden Editor to see the result.

4. Improve result

Asset Configuration

To customize your map you will have to create an asset configuration for Arma 3, and then select the configuration in your map settings (to replace builtin:CentralEurope.grma3a).

Contribute to OpenStreetMap

You may also fix issues in OpenStreetMap data by editing on OpenStreetMap.org, or simply improve data by adding more details.

WARNING: OpenStreetMap MUST remain the exact image of the reality, DO NOT ADD FICTIONAL details to OpenStreetMap for your needs !

Follow the OpenStreetMap guidelines : https://wiki.openstreetmap.org/wiki/Contribute_map_data

Contribute to GameRealisticMap

The generation process may have issue, or might do more job for you. Feel free to report issues or to create pull-request.

Tune Arma 3 config

TODO / Find links to documentation

Edit with Eden editor and integrate to map, or export to Terrain Builder

You can use Eden Editor (Arma 3 builtin scenario editor) to edit map to improve the generator result. This is the recommended way for most users. See Edit With Eden Editor.

You may otherwise use Terrain Builder to edit map, this tool is intend for experienced terrain makers. See Terrain Builder Export.

Comparaison of features of two edit process:

Feature	Eden Editor	Terrain Builder
Difficulty	★★	★★★★★★ (1)
Speed	★★★★	★★
Add objects	Yes	Yes
Remove objects	Yes	Yes
Replace objects	Yes	Yes
Edit objects	Yes	Yes
Edit terrain elevation	With Deformer Mod	With Buldozer or external editor
Edit terrain textures	No	With Buldozer or external image editor
Edit satellite image	No	With external image editor
Edit roads	No (2)	Yes
Size limit	No limit	~40x40 Km with 1 m/px resolution (3)

(1) Terrain Builder is difficult to learn, but once mastered is extremely powerful.

(2) You may use roads objects, but they are not real roads.

(3) Terrain Builder can become really slow and may crash with large maps, it is a 32 bits process, whereas Arma 3 is 64 bits. You may be able to create larger maps, but it will cost you a lot of time.