Keeping up with our weekly Preview pace, get a peek at what's in store for the 4.11 release, with Preview 4 of 4.11 now available to download on the launcher. It includes new features such as lightmass portals, sound occlusion and support for hardware instancing on iOS and many Android devices.
If you have an existing 4.11 Preview installed, you can hit the upgrade button instead. If not, to find the new Preview, head to the "Library" section of the Unreal Engine tab in the Epic Games Launcher select "Add Versions", and choose 4.11 Preview 4.
Read up on the fixes included in this release in the forum post from Stephen Ellis, and be sure to have a look at on the known issues list to see what's still outstanding. A friendly reminder, the Preview builds are for testing only and should not be used for the active development of your project.