The current method of collaborating when it comes to creating a map for Arma 3 is not the greatest. It would be really cool if you could have multiple people working on the same map file at the same time so that way you don’t have to go back and forth and send each other the map files so it can be merged. You know what would be really cool for Arma 3? Well at least for Arma 4 when it eventually comes out? How about a co-op Eden Editor, a multiplayer map editor!
