The captain looked out of the window and saw a colorful landscape swallowed by the mist. However there was one problem. The spaceship had no place to land. The terrain of mountains wasn't fit and nobody knew what lies below the fog.
Update - 4 May 2021
Today I created some terrain using Landmass plugin in Unreal 4.26. It gives a lot of options and helps me to create hills using non-destructive workflow. Here is a link to tutorial I followed.