Here is a little Modelviewer,
just insert your terrain into it at the position
string das_model=<marine_cosh.mdl>;

You might just scale it in cas it is to big.

This way you can test how the material settings affect the terrain.

http://www.coniserver.net/ubbthreads/showflat.php/Cat/0/Number/684932/an/0/page/0#Post684932

rtsmaker.com