Check out this small little tool that lets you build great open world environments.
Here’s a short description of the updates from the developer:
Changes:
Notes 1: I have noticed that some things act funny when using this for the first time. When you initally open the Grass or the Forest Cover Grass Type if I change any parameter the editor will crash. The reason behind this is unknown and the error popup links the issue to an array read error in the engine so it looks like it is not related to a fault on my side. A work around for this is to simply paint at least once on the terrain with the grass brush this should start populating grass and forest around the area that you are painting. After this save and then change any variable in the grass type node and all of the terrain will then update with the correct type of ground cover.
Note 2: There are no speed tree or kite assets in the released plugin. Everything there-in was created by me with Zbrush/Bitmap to Material 3/3DS Max. That being said I’m no artist so change everything lol.
You can read more about this plugin in this thread on UE4 forums.
Source: forums.unrealengine.com