kelvinhughes, which version of Vue are you using? (Asked to prevent you getting anwers that you can't apply) :-) And, if you'll forgive my temerity, ('cos I'm fairly sure I know exactly what you mean) a re-phrase of your question: "How do you create a wall (maybe with varying directions) which follows the vertical contours of an existing terrain such that the wall maintains a consistant height above that terrain?". (Hope I got that right...) I, too, would like to know the answer. I can do it in Bryce, but not sure how to do it in Vue... Cheers, Diolma