https://www.youtube.com/watch?v=SJLsjf6oX3Y

This is Altai Mountains in 3 shapes. 3 maps of 2 km in size, each with different types of terrain and environment lights, with a good mix of vegetation, rocks and ground textures. Also, three realistic mountain meshes surround the terrain nicely. The blue lake in this terrain adds to the atmosphere. The meshes in this each have their Lod settings, and the trees in the distance are converted to billboard meshes.