Jelisa's Place as a tutorial on creating Castle Ruins at http://www.fignations.com/jelisa/tutorials/ruins1.html and La Avec Bryce 3D has a tut on creating ruined columns at http://perso.club-internet.fr/lann/Pages/tut/colonne/colruine.html He also has tutorials on creating different kinds of columns that aren't 'ruined'. The site is in French but the pictures are pretty easy to follow. Hope this helps.