Hi Terry:
If you wish to "Append" your custom VTP BGL file and examine it in SBuilder for FS9 along with the FS9 default vector LWM BGL files for that airfield area, you may find them in:
[FS9 install path]\Scenery\Eurw\Scenery\
Files pertinent to that airfield area would have names such as
??947130.BGL and
??947140.BGL.
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FYI: AFAIK,
aside from the FS9 default EGHA 'Airport Background' Polygon:
[FS9 install path]\Scenery\Eurw\Scenery\AB947130.bgl
...there is no FS
default VTP BGL made specifically for
Compton Abbas Airfield (IATA: n/a,
ICAO: EGHA) so, if you wish to examine that airfield area from FS2004 (aka "FS9") in SBuilder for FS9 as an "Appended" file, there will not be any other
default "VTP" file found for
ex: a local land class textured polygon aside from the '
class mapped' Airport Background polygon referenced above.
NOTE: The above FS9 default
EGHA 'Airport Background' Polygon:
[FS9 install path]\Scenery\Eurw\Scenery\AB947130.bgl
...
can be Appended to your VTP grass polygon project in SBuilder as alluded to in SBuilder's Help file:
(
see:
SBuilder Menu > Help > Search Tab > Search String: "VTP" > click 'List Topics' > Append - VTP BGL)
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http://en.wikipedia.org/wiki/Compton_Abbas_Airfield
http://toolserver.org/~geohack/geoh...8_02_N_002_09_13_W_type:airport_region:GB-DOR
FYI: You can view most (but not all) default FS9 terrain scenery BGL files for the EGHA airport area in:
[FS9 SDK install path]\TERRAIN_SDK\Terrain_Tools\tmfviewer.exe
You may also find it more informative to examine that airfield area in Jim Keir's
LWMViewer2:
http://www.jimkeir.co.uk/FlightSim/LWMViewer2.html
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BTW: In order to achieve successful display of a appropriately created FS9 format LWM VTP (Vector Textured Polygon) BGL file, you must be sure that the both the internal VTP "Layer Number" of the BGL, and its position in the FS Scenery Library stack of display priority layers ...allows your custom polygon (mapped to a FS default land class texture) to appear
on top of underlying default or other 3rd party scenery layers.
PS: You may find it helpful to review this thread on a related topic:
http://www.fsdeveloper.com/forum/showthread.php?t=426177&highlight=layer
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Hope this info helps you sort out the scenario at your airfield of interest.
GaryGB