Mmmm, I forgot about that one. Will it work with Howard's Natural World?

Yes of course. It will change the world, especially with dawn-dusk when flying over know areas.

Thanks, Johan, I'll give it a try.

And what freeware mesh should I try? My home town, Cape Town, has a very funny looking Table Mountain.

I have no idea, check the library here for some free mesh ?

Thanks, Johan, been there, as well as most other libraries. I was just asking for alternatives that people have been happy with..

I found this to be pretty good. It covers the whole world but you can pick the bits you want:

 

http://simviation.com/1/fs2004terrainmesh