Hi Sutts, well for a polygon modeler you might check out Silo or Blender.

If you do a web search for "blender terrain", you can find some stuff:

https://artisticrender.com/how-to-use-blenders-free-terrain-generator-ant-landscape-add-on/
https://www.blendermarket.com/products/true-terrain-
https://www.youtube.com/watch?v=Tf9qUs0rqik
https://www.youtube.com/watch?v=jyvbRJJTzY4

- Michael

Or this free one who has an UI Moi's like! ;)

And direct MOi <-->Rocket 3F objects export / import to the screen in the 2 ways with just a press key on an icon !
https://rocket3f.com

Thanks for the pointers, will check those out.

Here the same cube drilled above on a volumical spiral with the Flow Function!
As you see in less 30 seconds absolutly no problem & difficulties! :)