Good Morning Nick and Marcus,
I again removed Orbx PVAD airport, then SA region to reinstall in opposite order.
I made a deep search for any "alien to Orbx" PVAD files except the P3Dv4.5 stock Valdez airport and made sure they are all removed.
I ran the auto-configuration of airport elevation corrections pushing Apply several times.
I resynchronised the simulator via Orbx Central/Settings/Help several times.
The end result: Valdez has terminal buildings on a L-shaped plateau compared to the most part of the runway area. When I taxi from threshold RWY06 to threshhold RWY24, I have to endure a psychedelic trip as illustrated in detail in previous postings.
I'am able to make the RWY operational via correcting the elevation of Orbx PVAD coded for 75 ft to the real elevation of 121 ft. The stock Valdez airport has been coded for 118 ft. When I let compile the bgl for 121 ft via ADE using P3D SDK, the terminal buildings evaporate in black floors with RWY and terminal area at the same level. However, this greater area is on a plateau versus surrounding Orbx scenery. The RWY is solid and behaves normal for TO & LDG from threshold to threshold.
I must disagree with Nick stating there is no intrinsic fault in the Orbx Valdez and South Alaska sceneries. Both layers are coded for an elevation of 75 ft instead of the real value of 121 ft according to the FAA official ARP (Aerodrome Reference Point) data value. Prepar is doing a better job here with 118 ft, but has no priority in the layering. I presumed Orbx products are famous for enhancing realism not just eye candy. Lockheed Martin Prepar3D has not been conceived as a game but as a real simulator for aviation professionals. I'm not talking about a misplaced tree here or there, but in my humble opinion something fundamental as airport elevation aiming to keep matching reality whilst enhancing the visuals. I'm in no way contesting here that Orbx Valdez + Region South Alaska might work flawlessly on most of the customer systems over all those years. Except for when setting the correct actual QNH (keypress "B") the altimeter will indicate a faulty 80 ft on the runway and tarmac. Most probably not the reason for my issues on my system but still an undeniable fact.
Looking foward to your replies and kind regards,