FS5 is the first version of the series to use textures. This allowed FS5 to achieve a much higher degree of realism than the previous flat-shaded simulators. This also made all add-on scenery and aircraft for the previous versions obsolete, as they would look out of place. In 1995, Flight Simulator 5.1 was introduced, adding the ability to handle scenery libraries including wide use of satellite imagery, faster performance and a barrage of weather effects: storms, 3D clouds and fog...