You can create your terrain from scratch and use the different nodes to build it,
or you can import your own terrain and work from it.
Instant Terra is a node-based tool.
It offers non-destructive design updates, reusability and automated realism.
Automate the realism: simulate the natural effects of time, such as rain erosion or wind erosion. Your terrain looks realistic because it has aged according to the natural laws of geophysics.
Instant Terra export is compatible with all the main formats and you can work easily on your terrain with your usual DCC.