Sky textures are best at very high resolutions. We try have a selection of artistic cloud shots, very large photos using multiple photos to stitch them together, and 180 degree half spherical photos that use an ultra wide lens.
The best use of these sky textures is in creating, or adding a sky to an existing photo, or using them as a sky box for video game level design. They also go well as a background or stock photo for web design, and banners.
All textures here are free to use so enjoy!