Just after departure with the NGX and only with the NGX I start to notice that the ground is disappearing in sections turning black or grey. Also on approach I see the same thing. Also at night, upon landing the airport terminals and buildings have completely disappeared!! Nothing remains apart from the AI traffic and the runways and taxiways. This only happens with the NGX and I haven't experienced any other problems related to this, with other PMDG products.

+1 here as well... I chalk it up to the memory getting drained. It will be there at the beginning of a flight, but after a half hour... gone.

-1 Never happened to me. You can see my specs, anyway. If it is a memory thing, what your specs?

Sounds like FSX memory "load-shedding" to me.

My specs are ok I have Intel i7 940 2.8ghz, 6GB DDR3, I dont see how my specs could affect this.

Have you added "Highmemfix=1" (without the quotation marks and note the spelling) to your fsx.cfg file under the [graphics] section?Tim

Have you added "Highmemfix=1" (without the quotation marks and note the spelling) to your fsx.cfg file under the [graphics] section? Tim

yea, I do...

My specs are ok I have Intel i7 940 2.8ghz, 6GB DDR3, I dont see how my specs could affect this.

I have the same specs except i7 950 and OC'd to 3.8... but with 6GB of DDR3 2000MHz ram. I am fairly certain its memory shedding... I was flying the new FSDT KLAX, which is pretty meaty. Half of the terminals were gone after flying in from KLAS. Are you using add-on scenery???

yea, I do... I have the same specs except i7 950 and OC'd to 3.8... but with 6GB of DDR3 2000MHz ram. I am fairly certain its memory shedding... I was flying the new FSDT KLAX, which is pretty meaty. Half of the terminals were gone after flying in from KLAS. Are you using add-on scenery???

I do use add-on scenery, but it still happens even in the default airport scenery.