Hello Thorsten,
Sorry about the oversized screenshots, I didn't think about resizing them before posting (was in a hurry a that time).
My spec :
Acer Predator Aspire G7700
Intel Core 2 Quad CPU Q9550 @ 2.83Ghz
8 Gb Memory
DirectX 11
Vista Home Premium 64bits
FS9.1 with 4Gb special patch
2 X Nvidia GeForce 9600GT (2 x 4Gb memory)
24" Acer G24 screen
For my FS9 settings :
Absolutely all FS9 sliders set to MAX (including shadow option). FPS locked at 35 FPS
Not using AI as I'm flying on IVAO
Using ActiveSky 6.5 (unlimited number of clouds layers)
I'm using Ultimate Terrain Europe (set to MAX) and worlwide MESH by FsGlobal 2008
AES, Orly X, CDG Payware, Kaitak Tampa, JFK FsDreaTeam, etc...
Wilco Airbus, PMDG MD11, SSTSIM Concorde, F100 DA, etc...
With this configuration and as an exemple, I have about 15-20 FPS at Orly X daylight with several clouds layers, rain, AES, some AI from IVAO, weather radar from RealityXP, and payware aircraft like Wilco Airbus or PMDG MD11 (would be around 25 FPS if clear weather).
For Djerba, totally clear weather, no Ultimate Terrain, no AI traffic, and basic freeware aircraft I've got barely 10 FPS with the update. If I add ActiveSky weather (some clouds layers) and payware aircraft then it go down around 5-10 FPS. Almost impossible to use this scenery in this case, and actually I only used DjerbaX for testing.
If I remove the shadow option, I have around 8 FPS more (I've got about the same on other payware sceneries). Still below other scenery average FPS. Especially when we consider the (rather) small size of the scenery (compared to JFK FsDreamTeam for exemple).
As for the update, I confirm that there is one available on Aerosoft.
Keep working hard mate, I'm sure you will find a way to improve performance once for good...
Alex