Update 12/02/2015: The contents of this blog post have been moved to the Digimap Help system and can be found at the following location (link opens in a new window):
For an overview of Building Height Attribute please see the following page (link opens in a new window):
http://digimap.edina.ac.uk/webhelp/digimapgis/index.htm#bha/bha.htm
![QGIS 3D visualisation with trees](http://digimap.blogs.edina.ac.uk/files/2014/10/3d_with_trees2-1024x657.png)