How Does MegaScenery differ from default FS2004 Scenery?
Flight Simulator scenery is divided into 3 types, polygonal, texture tiles and autogen. All 3 dimensional buildings in Microsoft flight simulator are polygonal scenery objects. The random trees and buildings you see scattered throughout your Flight Simulator world are autogen objects and are also at the same time polygonal. The cross country textures such as urban textures, farmland and anything else you see on the ground as you fly cross country are repeating texture tiles. These are created and placed by the program based upon the land type. These textures guess at the actual land type and place these generic repeating textures down accordingly. So if you are in a city area, Flight Simulator places repeating urban tiles and so on. Also underneath the textures is DEM (Digital Elevation Model) data also known as terrain mesh. This has the elevation data and these repeating tiles are placed over the DEM so that altitude information is represented in the scenery. Nevertheless the texture
