I've stitched together a custom horizon texture at 2x the resolution of the original textures. Sampled from pictures of the ukranian countryside
some pictures of it in action:
https://imgur.com/a/vg0eTJH
a subtle difference, but the more pixels the better, right? hope you beautiful people enjoy
http://www.mediafire.com/file/mj48x5pesk89g6s/cmbs_horizon.zip/file