In English it's easier to understand

[chrisdn]

I know what you mean now mate. I was planning on doing that once I'd worked out the final layout of the ships. At the moment I'm still figuring out exactly where things are going (external structures). It's take a while to do though because of the shape of the wings, bulbous stern etc. Is it best to atrt with a polyline or something else? The first I've done the body was made from a single spahere and the wings were extruded from a polyline and then subdivided to get the surfaces.