Mesh Creation

Hi,
I am having trouble understanding how to make terrain mesh in SBuilder.
I would prefer to use the USGS Seamless server GeoTiff or bil files for this.
Is there anyone who can give me a quick run through (or a full tutorial, if you have time
)?
Thanks!
8-)
I am having trouble understanding how to make terrain mesh in SBuilder.
I would prefer to use the USGS Seamless server GeoTiff or bil files for this.
Is there anyone who can give me a quick run through (or a full tutorial, if you have time

Thanks!
8-)