While we are talking texture addons....
I had a system crash and did a full OS reinstall. Took 3 days to rebuild FSX to how it was but with once exception. I finally "upgraded?" to Activesky 2012 from the older Evolution.
Since its not cheap and had its own clouds, I decided to simply things and not reload Flight Enviroment Extreme. Well, after staring at the FEX clouds/skies/sunsets ect for 3 years,IMO Activesky 2012 just does not cut it.
All their clouds looks like cotton balls. No character or realism but cookie cutter clouds randomly thrown around. White powder puffs but in the menus their were page after page of clouds with strange names but to my eyes all looked about the same. That said their runways textures,taxiways,roads,railroads and of course their weather system are great. In the setup menus you can easily disable which textures not to load,clouds........ and then I reinstalled FEX utilizing their clouds/skies ect ect......
Clouds have character,variations in color,intensity. I flew around some huge thunderstorms and saw rain columns coming out of lower clouds and hitting the ground. Just amazing clouds and with Activesky running the weather its a perfect combination.
As far as mesh... Maybe things have changed and they worked it out but unless its a custom scenery I had issues. The main one was all the airports were lifted on mesas and stuck out like a sore thumb.