Cloudy coastal scenery. Variant of this image digitally manipulated with vibrant gradient variations in the sky and a curving horizon to simulate a more planetary atmosphere.
This photo is offered under a standard Creative Commons License - Attribution 3.0 Unported. It gives you a lot of freedom to use my work commercially as long as you credit and link back to this image on my Flickr page.
Flickr resolution: 1800 x 1200 px
Also available for download at 5000 x 3333 px on my Patreon page, an ever-growing collection of high res images for one low monthly subscription fee. You can find this specific photo at the following post: