https://digitalartlive.com/3dad-037-terragen-4-interview-with-oshyan-greene-on-the-latest-version-of-this-landscape-generator/
Cool, listening right now.
Digital Art Live put out a "best of" Podcast list recently that included this interview from *March 2016*. So be aware it's not new, and info in it may be a bit out of date at this point. ;)
- Oshyan