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Ground Poly for non-stock airport fails

I'm trying to create a new airport 10km south of an old airport (VVPQ - Duong Dong was replaced by Pho Quoc Intl. in real life). The GP fails to flatten and exclude autogen. Can I presume that a GP only works on a stock airport? If not, are there other ways to make a GP where no stock airport exists?

Thanks for any suggestions!


Staff member
FSDevConf team
Resource contributor
I assume you are using land class polys



These are compiled separately from the airport bgl file with _CVX in the name. Make sure that the _CVX bgl file is copied into the same active scenery folder as the main airport bgl file

They are not restricted to stock airport but should work for user defined non stock airports