Terragen is a scenery generator, created with the goal of generating photorealistic landscape images and animations. It is available for Windows and the Mac OS. At this stage in its development, Terragen is free for personal, noncommercial use.
Terragen is an extremely powerful piece of software, which can create stunning and almost photographic images of landscapes. It is in a constant state of development and is currently free for non-commercial use, which is nice. You are limited to images of 1,280 by 960 however.
The interface is relatively straightforward and within minutes it's possible to turn out an impressive landscape. Terrain can be created manually or from various types of digital mapping, notably that supplied care of NASA. Atmospheric conditions, cloud and water levels are all easily manipulated along with general camera preferences. Terragen exports your landscape as a Lightwave .lwo file so unless you use Lightwave you must translate your new world into a format that would be useable elsewhere.
It is well worth to make the rounds of the website for the documentation and assistant applications, such as Terranim. This creates a animation of your world by using a script to run Terragen. If you want to play God and create sweeping landscapes then Terrgen is ideal place to start.
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