Terragen is a powerful 3D landscape and atmospheric rendering application developed by Planetside Software. It is used to create photorealistic 3D environments and animations, from simple to complex. It provides a variety of tools and features, including terrain and atmosphere generators, 3D plants, volumetric clouds, weather effects, and particle systems. It is used by professionals in the entertainment, design, and architecture industries, as well as hobbyists and home users. The Terragen interface is designed to be user-friendly, allowing users to quickly create stunning landscapes and animations.
Discontinued No recent releases since 2010. See https://code.google.com/archive/p/picogen/downloads