The latest free update for Arma 3 adds the much-awaited Eden 3D editor, for improved ease of scenario creation and editing. This ‘Eden’ update also adds a launcher-based server browser.
A complete changelog, which notes further additions like various scripted system optimisations, parallax ground surfaces, and HBAO+, can be read over here. It’s pretty hefty in size.
Here’s a short video showing the Eden 3D editor in use.