Bliss, originally titled Bucolic Green Hills, is the default wallpaper of Microsoft's Windows XP operating system. It is a photograph of green rolling hills and daytime sky with cirrus clouds. Charles O'Rear, a former National Geographic photographer, took the photo in January 1996 near the Napa–Sonoma county line, California, after a phylloxera infestation forced vineyards to be cleared from the hill years prior. He used the Mamiya RZ67 camera and Fujifilm's Velvia film to create the photograph; O'Rear remarked that he did not enhance or manipulate the photograph.