I have tried to source them by looking for missing alpha textures in scenery textures, ai textures with no result.

What could it be?

Note that I don't get such issue at Flytampa's.

Thanks

G.V.

Could you please post it in our forum, indicating exactly which sceneries have this problem ?

 

It's possible something might need an update but, almost nobody contact us with FS9 question nowadays so, many installers are not updated as they could (and are, in FSX)