Before we will finally see the multiplayer, perhaps the map editor, for Far Cry 4, IGN had uploaded a footage of Forge from the Halo: Master Chief Collection.

http://www.ign.com/articles/2014/10/...tion-ign-first


Forge allows players to add terrain, sort of. We see that players can add terrain shaped objects, instead of actually setting the terrain modified through geometry like in any Far Cry game. There is a selection of foliage that can be placed throughout Forge. In the video, they also presented scripts that can be trigged via screens, which can spawn or delete vehicles, objects, or activate gates, explosions, etc.