I might have a play. Good thing is if i keep cache safe, i wont have to download them all again. GIMP has a similar tool i think, but I've never used it. I assume there's a naming convention to the tiles so the sim knows which ones to load in each season? (I haven't checked the manual yet)
That will be a bit OTT I think, and this is something I'll be dipping in and out of for months (time permitting). I might have a go at a small island somewhere when it comes to trying the seasons. I like flying to Malta and Cyprus, so I'll have a look at those in the future. As it stands at the moment the cache is 15.4GB with 395428 files!
I've downloaded the Malta and Gozo tiles and I'll use that to try out the different masks etc. One thing I did notice was the remains of another airfield North West of Luga.
I remember from when I was a kid in Malta during the early sixties. There were some other (disused) airfields even then. Hal-far was the FAA field, Safi and Ta'Qali were ex-RAF fields