Here is a mention in the manual:-
WHAT WILL YOU MISS OUT ON IF YOU DON'T HAVE ORBX FTX INSTALLED?
- Blending of the airport photoreal into the surrounding terrain
- Moving traffic on roads, properly aligned to the photoreal ground terrain
- 3D light poles along roads and in urban/township streets and around the airport
- Orbx's modified houses and trees which match the European houses and trees
- The FTX Central application, which is used to launch all the Orbx tools and also switch FTX off
Please visit
http://www.fullterrain.com to purchase your copy of FTX if you haven't already done so.
Manual Scenery Library Configuration
If you do NOT have Orbx FTX installed you can still use this scenery by manually adding the scenery library
entry from within Flight Simulator X/Prepar3D.
Here's the steps required to configure the scenery library.
1. Run Flight Simulator X/Prepar3D, then selecting Settings | Scenery Library
2. Click on the Add Area button
3. A folder browser window will pop up.
4. Navigate to the ORBX \ FTX_EU folder
5. Now select the FTX_AA_EGTH folder and click OK
6. You will then see two folders displayed, Scenery and Texture. Now click OK*
*(Note: If you're using Windows 7, click anywhere in the white portion of the folder browser screen that shows
the Scenery and Texture folder, not the OK button - there's a bug with FSX/P3D under Windows 7)
7. You will now be taken back to the Scenery Library list of scenery added, and the airport will now be
displayed at the top of the list.
You can now load up a flight at the airport using the "Free Flight" menu.