In order to leverage the full potential of the new non-destructive landscape creation, it would be good, if the class “FLandscapeToolSplines” in “LandscapeEditor/Private/LandscapeEdModeSplineTools.cpp” could be used f.e. in custom editor plugin code. This class provides all functionality to work with landscape splines (adding control points, adding segments etc). Currently there is no obvious way to create or change landscape splines in the editor via C++.