Done some more work on it today.
this is what i meant abou tmaking the base semi-buried in a mudslide. still owrking on these displacements and the best textures to use:
and heres the plan for the layout:
http://usera.imagecave.com/bumgravy/fortyplan.JPG
Whats left to do:
CP3, its been roughly planned but not started mapping it yet
Finishing CP1
Connecting Cp1 and the fortress front (cp2) with displacements and stuff, gonna have some kinda outdoor/cave structure.