If you like the look of the FE2 desert game world in shots below, here's how to make it.  Note the new terrain tiles replace most, but not all of the original terrain tiles, so the upgrade is not 100% uniform across the entire terrain map. 
  
Start with Stephen1918's excellent Palestine Terrain: 
http://combatace.com/files/file/14857-palestine-terrain/ 
  
Then, replace the existing terrain tile art with JSAggie's Hi-res desert tiles: 
http://combatace.com/files/file/12368-hi-res-desert-tiles/ 
  
Then, upgrade the game lighting and clouds with my Improved Game World stuff: 
http://combatace.com/files/file/15939-improved-gameworld-appearance/ 
  
If you have a healthy video card, then add the hi-res airfields at bottom. 
  
  
 
  
 
HI-res Airfields.rar