Here is a project I finished last week. I modeled the bulk of the building in Revit then exported to blender to add details, materials and lighting.
I rendered with cycles at 1500 samples using two or three GTX580’s 3-5 hours depending on number of cards used. I made the terrazzo with procedural textures. I used a lot of examples from this forum and from blenderguru.com and cgcookie.com to accomplash this. Thanks to eMirage for giving us the great architecture model to pull from, I think i used the trees and glass. I also used the procedural wood texture posted here, can’t remember the user though. I’ll be glad to upload the blend file if anyone is interested. Thanks for everyone’s help from this forum.