Topographic render of Mt. Rainier in Washington, USA.  Converted from DEM file and rendered with Vray in Maya.

 

Topographic view of Castlegar.  Converted from a DEM file to a useable file in Maya.  Texture was created from images stitched together in Photoshop via Google Earth.  Rendered with Vray.

Here I used Vray rendering in Maya.  I modelled the tricycle, field grass, and used Vray fur for the grass.  Background images were comp'd in but were used for lighting.