DrAwesome and I teamed up to present to you all some quality skydome graphics with the use of SpaceEngine!
(my youtube | my facebook).

What is SpaceEngine? It's an incredible & free "space simulation program that lets you explore the universe in three dimensions, from planet Earth to the most distant galaxies. Areas of the known universe are represented using actual astronomical data, while regions uncharted by astronomy are generated procedurally. Millions of galaxies, trillions of stars, countless planets - all available for exploration. You can land any planet, moon or asteroid and watch alien landscapes and celestial phenomena. You can even pilot starships and atmospheric shuttles."

These new textures did not need to be much more than 1k resolution, in fact game stability is compromised at 4k & up. These textures are so distant that increasing the resolution makes no sense as there would be no benefit visually, however it could impact performance.

Screenshots were taken using my other project, Mod Community Graphics :)

UPDATE: New installation instructions :)

Install using OpenIV!

1) Using OpenIV in Edit Mode, drag and drop the skydome.ytd file to this location: update\update.rpf\x64\textures (Thank you SAEVARM3 !)