I found World Machine after wasting way too much time trying to kitbash a terrain for my Unreal project using separate height maps* in several clumsy ways (assembling them in Affinity, turning them in alpha brushes and stamp the features in Blender’s sculpt mode) - I hadn’t really considered dedicated terrain building software because last time I looked, that was way over my budget and strictly windows-only. I was surprised to find WM offered a mac version for a very decent price, and what’s more, after working through some tutorials I think it can do what I need.

Thanks for creating this marvelous tool!

(* also, many height maps I could find were created from satellite radar data that contained lots of noise, so that the result looked like it was covered in a layer of sand )