Vue by E-on is a range of software for creating, animating and rendering natural 3D environments.
We have always liked Vue for its ease of use and detailed output, so we are definitely looking forward to Vue 7 which is due later this year, the movie below provides and insight into its capabilities, especially for landscape visualisation:
See http://www.e-onsoftware.com/ for full details on Vue, it is also worth checking out OZone 3.0 E-on’s plugin for the main 3D packages aimed at creating realistic atmospheres.