Green screen always looks deceptively simple from the outside, just a flat coloured wall, a key, a bit of compositing and you’re done, but for Heiko Thies and the small team behind Loreley Productions in Germany it’s always been the edges that matter, the hair that doesn’t quite separate cleanly, the motion blur that refuses to sit still, the spill creeping into places you don’t notice until you’re already deep in post and everything suddenly slows down.
As director of photography Thies puts it, “green screen work was always a lot of guesswork, you always had to have lots of markers on the screen to track each shot in post,” which sounds manageable until you realise those same markers start showing up in all the places you don’t want them, crossing fine detail, interfering with transparency, making keying feel less like a process and more like negotiation, “this is super annoying during keying later on,” he says, especially when they sit right over things like hair edges where you’re already fighting for separation.
