RhinoTerrain is a plugin for terrain geomodeling in Rhinoceros software.Version 1.8 of RhinoTerrain includes geographical transformation based
on GDAL, Google Earth importer, major GIS format import (shapfile, dem,
ArcGis, Geotiif, ...), real-time terrain editing, viewshed analysis,
slope, GIS pointcloud processing (Lidar, Leica, Topcon...), and much
more.Download free trial on : http://www.rhinoterrain.com/page403-0-download.htmlhttp://www.rhinoterrain.comSome videos :http://www.youtube.com/watch?v=Qcp6oBPdovw&hd=1http://www.youtube.com/watch?v=LEFmjKZuDe4&hd=1http://www.youtube.com/watch?v=k9S5l10KMPM&hd=1Some pictures of it :

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