Skydome rendered with Terragen:

Bright sun shining through high wispy cloud casts sharp shadows with medium fill light. As the sunlight passes through simulated ice crystals in the high cloud a halo is produced. While the halo will appear in sharp reduced intensity reflections as in the real world it will be necessary to either reduce exposure or the world emission strength to view it directly.

Lowered horizon and non-specific rocky ground viewed from a standing height of 1.7m; not be obvious if seen from higher.