In the latest Unigine devlog update, the latest engine progress has been shared. Beyond supporting terrain data streaming in a fully asynchronous manner now, other terrain improvements were made. Additionally, there's now a landscape plug-in for creating huge seamless scenes with a virtually unlimited number of terrain objects, each up to 16385 x 16385 in size.
The Unigine Engine also now has support for pre-cached file hierarchies to provide file-system speed-ups, optimized terrain rendering, improved OpenGL Core Profile compatibility, and much more.
Unigine also has a new Helicopter Technology Demo they will soon be documenting. Before the Unigine Helicopter demo release, first will be a video teaser coming quite soon.