140 Clouds | Free pack
The specialist matte painting, concept art and photography, Jacek Pilarski , share this spectacular collection with 140 panoramic cloudy skies high resolution for you to use freely in your projects.
They are almost 4GB images in TIFF format available.
Click here to go to the download link.
All material is completely free, but you can always work with a small donation to support the author 🙂