Isometric Terrain in 3D

There are various examples in the code archives i.e. here:
http://www.blitzbasic.com/codearcs/codearcs.php?code=362

just add water and
CameraProjMode cam,2
for the isometric view.
You should tweak the movement, though.

It's always a good idea to check the archives first.

Regards,
Dirk