Hiya R C CAWTE
You question is one that has plagued mankind since time out of memory. Unfortunately there is no one size fits all simple solution. There have been many mesh packs, many coastline packs and many flatten packs. Its a real patchwork. Add on airfield collections fit well with one combination of mesh, flattens and coast lines and not so well with other combinations.
My recommendation would be to install- perhaps on a new CFS2 install- Rhumbflappy's set of DEM8 mesh and water masks.
See this thread,
Rhumbas Mesh Is Up! from back in June.
In the thread
Rami posts a link to his very
excellent guide to installing Rhumba's very excellent mesh and water masks.
The only "problem" with Rhumba's mesh and masks is that there are no shorelines (sand and wave lines) along the coast- but even so, the improvement in appearance to the anemic terrain outside the default CFS2 boundaries is breathtaking and
well worth it.
I say maybe two installs because many of the default CFS2 airfields and many of the add on CFS2 airfields that were built to the stock mesh and masks will no longer "fit" the terrain created by the more accurate coastlines and elevations in Rhumbas files.
I am using two installs myself. One for playing where stock CFS2 has provided "robustly' modeled terrain (mesh/masks)- Solomon Islands, Papua New Guinea and kinda-sortta in Micronesia. And another install for the rest of the world- modeled with Rhumbas mesh/masks.
Lots of guys have many separate installs for different areas depending upon which mesh, masks and add on scenery happen to cover the area.
PS Advance search the CFS2 forum for "rhumba mesh". There are quite a few recent threads on the subject.
Good luck.
Chris