This is a first try in offering some resources for you to play with. Maybe there will be more in the future. This first one is a freebie that you can grab here – you can either pay an amount you think justifies the quality/content or just enter a 0 to get this package for free. No one will hold it against you. :D The contents of this package are free to use for personal and commercial projects. Please check the included readme file for more info.
Beside the main terrain (8192×8192, 16bit) itself, this package contains a collection of masks (16bit) and colormaps that allow you to go into very fine detail when giving the mountain character by adding textures and materials. It’s best used with Vue or Terragen but can also be used with any other sophisticated 3d package that’s out there.