Thanks for the interest Phineus.
Ok here are the measuremnts:
Length: 7 grid squares
Width: 3 grid square (3 is width of road, so obviously it needs to be a little wider so that it does'nt sit on the road.)
Height: ummmm.....well, if u have seen SLO_Fila's tunnels in the recently realeased SLO Mountains, about 3/5's the height of them.
Thickness: Does'nt really matter much, probably about the same as Fila's.
Shape: Ummm, just want them to look like rocky, so they look & it will blend well into mountains.
Here is the ground texture I am using:
http://members.tripod.com/~cool_nba/groundtex.zipThanks