This render I did a couple of weeks ago for the Themed Contest 'Sunrays' over on Terranuts; for this version I added some moons and reflections.
Terrain I exported from a Mojoplanet Canyonshores made by
which I altered and worked over in GeoControl2; atmo, surfaces and water my own presets.
Rendertime was 5 hrs 6 mins @3840x2400; postwork ~ 1.5 hrs.
Hope you like it!