Check this cool model from Ronen Bekerman freebies, its the famous Azuma house by Tadao Ando
Available in Sketchup file format, you need to sign up to Ronen newsletter to download it (worth it)

Don't forget to visit Ronen Bekerman website and his GH House challenge
He do really amazing work, and there's some good things in the Freebies section
Happy rendering
