:shakehead Its the render settings. If i adjust the mental ray settings (production), the subdiv approxnode(length distance angle, view dependent, length 0.1) and the displace approx node (length distance angle, length 0.25, view dependent) I start to get a nice artifact/seamless render. alas, after 20 minutes or so, my computer folds on me... .... ..... Dear Santa, .... ....e.t.c....