Bohemia Interactive has released an Arma 3 developer diary featuring the upcoming new Arma 3 Scenario Editor. With the brand new Eden 3D Editor users will now be able to design their scenario from within the 3D game environment, which makes building their own scenarios - using Arma 3's library of weapons, characters, vehicles, buildings, and other objects – much more effective and fun. Plus, people can publish their creations to the Arma 3 Steam Workshop, or subscribe to 17,000+ scenarios made by other players.
The Eden 3D Editor will be made available to all Arma 3 players as part of a free platform update scheduled for release later in February 2016. Arma 3 Developer Diary on New Scenario Editor