Billboard sign texture,
billboard post texture,
bamppost post texture,
lamppost light texture,
lamppost top texture,
warehouse building texture,
warehouse window texture,
skyscraper building texture,
skyscraper roof texture,
statue texture,
plane concrete texture, and toxic waste textures are all from www.mb3d.co.uk.
License: http://www.mb3d.co.uk/mb3d/The_License_Agreement.html
Stone wall in unity: http://sketchup.google.com/3dwarehouse/details?mid=a8ed0131f75595edefef9d58bf1a7f16&prevstart=48