There's this tutorial and program but I found it somewhat confusing, perhaps you could make sense of it. It uses Terragen to create 3D heightmaps that are usable in FH.
https://feral-heart.com/smf/index.php?topic=5981.0
There is also this program, World Machine, that I haven't tried yet. Although this tutorial includes pictures and may be more helpful to you.
https://feral-heart.com/smf/index.php?topic=55262.0
There's this tutorial and program but I found it somewhat confusing, perhaps you could make sense of it. It uses Terragen to create 3D heightmaps that are usable in FH.
https://feral-heart.com/smf/index.php?topic=5981.0
There is also this program, World Machine, that I haven't tried yet. Although this tutorial includes pictures and may be more helpful to you.
https://feral-heart.com/smf/index.php?topic=55262.0
Awesome thanks!
Exactly what I was looking for.