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Ground Poly's over Airport Background??

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australia
Hello guys, hoping this is a simply answered question.

Should I wish to place a land class ground poly within the bounds of an airport background I am guessing that I need to ensure my a/p background has a hole in it to accommodate the land class poly, not simply place the l/c poly on top of the existing a/p background?
If this is the case, is there a tolerance for overlap or do I need to ensure they do not intersect each other at any point?

Thanks for the help,

Andrew (YMML)
 
By "land class ground poly", I assume you me a terrain poly in order to place landclass.

If that landclass you wish to draw is of higher priority than the airport background poly, then just create the new poly and it will be drawn on top of the airport poly. If of equal or lower priority, you'll either have to cut a hole in your airport poly or redraw it so that it completely surrounds the landclass - like a closed "C". Any overlap will be drawn in FS in the order in which the two elements are encountered by FS.
 
Thanks for the reply Don,
How do I tell what priority they occur at.
I ma trying to place a dirt L/C at the end of, but beyond, a runway within the airport background though. (hope that makes sense)

Cheers
Andrew
 
The terrain.cfg file fully defines each terrain.

If it's LC_Dirt you are placing, that likely will be the same priority as the airport poly.
 
By "land class ground poly", I assume you me a terrain poly in order to place landclass.

If that landclass you wish to draw is of higher priority than the airport background poly, then just create the new poly and it will be drawn on top of the airport poly. If of equal or lower priority, you'll either have to cut a hole in your airport poly or redraw it so that it completely surrounds the landclass - like a closed "C". Any overlap will be drawn in FS in the order in which the two elements are encountered by FS.
Don, where do I find the priority level for any particular airport background? I am currently not able (P3Dv5.3 w/HF2) to draw a ground poly with any of the landclasses and have it displayed after a compile. The same happens if I add an "aiport background/Flatten". ADE compiles it but it is not seen in P3D.
 
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