L3DT is a powerful and user-friendly 3D terrain and landscape generator. It is designed to generate highly detailed virtual terrains and landscapes for use in games, simulations, architectural visualisations and art. It is a Windows-based application with a simple and intuitive user interface, allowing users to easily create and manipulate 3D terrains with just a few clicks. It features an impressive range of tools for terrain and landscape generation, such as erosion, hydrology, terrain deformation, and procedural texture mapping. It also contains a powerful scripting language for creating custom landscapes, and a built-in engine for rendering and visualising landscapes. L3DT can also be used to generate terrain for 3D printing applications.
Discontinued No recent releases since 2010. See https://code.google.com/archive/p/picogen/downloads