RE:DD effects in Stealth
Digital Domain used their proprietary in-house tool "Engen" (sometimes referred to as "Terragen"), which is based on code originally developed by Matt Fairclough while he was working at Digital Domain. Matt is the lead developer of Terragen at Planetside Inc. The code that forms the basis for Engen was also used to ultimately create Planetside's commercial product Terragen 2, although significant development occurred since Matt left Digital Domain and the products are now quite different.
In Stealth, Engen is used primarily for terrain. Vegetation and clouds are done using other tools - Houdini for plants and Digital Domain's own proprietary volumetrics rendering software for clouds. Not all terrain shots were done with Engen and I make no guarantee that any images pictured here are entirely or even partially created using Engen.
link here: http://oshyan.ashundar.com/galleries/index.php?cat=12