The editor appears to draw the shape on a different side to the one I want. Here is an example where I have tried to draw a polygon on a pentagonal block. I have managed to get things to co-operate today so I may just rebuild the van from scratch to see if that helps. The motivation to use the spline and not a vertex object is that I will be animating this and want to keep everything as clean and simple as possible. Thats one of the reasons I am mapping the textures rather than building them into the geometry. Cheers everyone