I found a desktop wallpaper on the web that i would like to use for commercial work. I am interested in using about 30% of this image, but I am not sure if it is legal.
I googled a lot and there is no information about this picture to be found, such as photographer, or any stock site that sells this picture. Given that this picture is used all over the web, I suppose that this image is free to use, but I am not sure. Is there any regulation that handles these "download for free wallpapers" and explains the legitimate use?