Agree this is a critical feature. The whole point of f.lux is to prevent bright, blue light late in the day, but that's entirely defeated, and then some, when switching out of a game or a full-screen video and having a browser or other app suddenly blast a blinding white light. I set it to the gaming transition mode, which mostly helped (though still sometimes it would take a split second or so to react, so not perfect), but then it goes from full brightness to dim and orange suddenly mid-evening, which is also not ideal. I love f.lux, but this issue definitely makes it more difficult to use which also makes it a bit harder to recommend to people.