I'm using GIMP, maybe it has something similar, but I don't understand anything about masks, I know layers only, maybe time to learn those then
I don't know about airshows, this is small country where any extra CO2 production is considered as vandalism these days, so if there is air shows, then those can be last ones to visit until they ban them completely
While I was frying sausages at open fire (finnish tradition at this time of year) suddenly I did hear sound of plane, I saw small plane which was very very silent, like it would had electric motor, had my camera in car so grabbed it and took few pics, but I had only 50mm lens attached so even it did fly very low altitude there is barely a plane in picture.
If I would had 300mm perhaps I would been able to take first good plane shot, it was blue sky and light was from proper angle, frustrating those situations. Good 18-300mm might cost more than my heart is able to whitstand
Also I was taking photos of birds, when I heard odd sounded car to come by and as I was almost next to road took pic from it, auto focus just could not keep up, so I got perfectly blurred photo of 1920's hotrod, which are not too common around this part of world.
Just another nothing works day

Volvo 360GL -88 -under restoration-
Volvo 343DL vario -81 -running-

Volvo 240 Diesel -83 -undecided-
Citroen ZX Dturbo -97 -daily-

