I very much like the 3d map output into survex .3d format. However it does seem to have a problem at joins. It all looks lovely in plan view, but as soon as you look sideways you will see that there is often a vertical offset in the lines at the join. I can see that there _might_ be a pitch at the pont of the join, but normally a smooth transition in the vertical as well as horizontal plane is desired. How are the vertical co-ordoinates at the ends of scraps determined, and is it possible to msake sure they 'join' (have the same co-ordinates) both vertically as well as horizontally? The option to say 'add vertical lines to complete join' would be useful for cases where there is a step height change (e.g the connection between menagerie_s4 and terikan.reifticious_s1). But I'm not quite sure how/where this might be done. If it is hard, then joining everything up would be much better than it is now. See http://wookware.org/mulu/MuluWalls.3d, then look at it on a bit of a tilt. Wookey -- Aleph One Ltd, Bottisham, CAMBRIDGE, CB5 9BA, UK Tel +44 (0) 1223 811679 work: http://www.aleph1.co.uk/ play: http://wookware.org/