by Jakemaster » Sat May 13, 2006 7:53 am
Well thats a very broad question. For texture, assuming you mean aircraft textures, you use DXTbmp to convert them into the proper format and you can paint in microsoft paint (thats what I use) or any image editing software.
For scenery, AFCAD to make the airport grounds (taxiways, runways, parking, helipads, towers, naviads), and a program such as RWY12 (free) or EZscenery (pay) to add objects
For aircraft, Gmax or FSDS2 or 3