UnigineScript is deprecated and will be removed in future releases. Please consider using C#/C++ instead, as these APIs are the preferred ones. Availability of new Engine features in UnigineScipt is not guaranteed, as the current level of support assumes only fixing critical issues.
UnigineScript can be easily extended through the Unigine API. Source code of examples is provided within source and binary versions of UNIGINE SDK.
The idea is that some functionality is done by means of the C++ part of an application, and it should be registered in UnigineScript system in order to be used inside scripts.