For those of us born in the 1970s and 80s, this new phenomenon of mottled, cloudy backdrops appearing in modern portraits is an odd one. You see, back when we were kids, we had horrendously cheesy family and school portraits taken in front of these bizarrely arranged patterns, so to us, it’s pretty weird to see these painted, cloudy backdrops now grace the covers of Vogue and Tatler.Truth be told, I am exaggerating a little. Yes, we have plenty of…