In response to these;
http://www.cambam.co.uk/forum/index.php?topic=6857.msg55890#msg55890http://www.cambam.co.uk/forum/index.php?topic=6857.msg55903#msg55903Please find attached a plugin to take one slice of a 3D surface in the Z direction.
1. works with CamBam v0.9.8 and v1.0
2. Once installed it appears in, Edit->Surface->1 Slice
3. select a surface then click "Populate Surface Extrema"
Shows where the surface is located in 3D space and indicates the bounds of sensible values for the slice location.
4. select where the slice offset should be referenced from;
Top of surface, bottom of surface, the Z axis
5. click the "Slice" button to produce the slice.
A new layer is produced each time for the slice polylines
Edit: Now recovered after a very bad day on Friday, thanks to those who replied to my now deleted thread of woe and misery.
(Lloyd, Gary, Don, Bubba) ? hope I've not missed anyone else.