Instant Terra is a realtime terrain editor that can be used as a plugin for Unreal Engine or as a bridge to Houdini, but also a stand-alone tool. Create stunning environments for your game, film, or simulations. With the power of node-based creation, the possibilities are almost endless. Especially when you factor in the possibilities of python based scripting.

Instant Terra has been added to the Resources Page and can be found under realtime rendering, and Unreal and Houdini plugin sections.

Check out https://www.wysilab.com/ for more information.