I looked that th turoial for doing roads and rivers. I got the patten I requited and set the height/depth as low as I could which was only 50m. for a roman style path/cobble road 10m would have been more than enough I think but it won't go that low. so 50m by 4 m wide (its a darkage wildeness path come track of ruined cobble stones). My problem is when I do a render I get a row of spickes along the vector, my node setup is just like the tutorial, the height and width are the only things different that I can see.
Shame we don't have a path/road device that we could drop in select the options:
Cut a path follow the terrian width height/depth from the terrain colour/colours
them plot the vectors when required. Don't know if this could be done with a macro I have trouble making a terrain nevr mind macros at this point