As anyone who's read J.K. Rowling's last Harry Potter novel knows, there is lots of death as the story of the Boy Who Lived comes to a close. And one of those memorable demises has been tampered with for the climactic film—with the author's blessing.
Again, a big SPOILER ALERT is in full effect, so read no further if you'd like to remain unsullied.
In the novel, the traitorous Severus Snape (Alan Rickman) is dispatched by Voldemort (Ralph Fiennes) in the Shrieking Shack—the house constructed so that lyncanthropic Remus Lupin would have a safe haven to ride out the full moon while he was still a student in Hogwarts. According to art director Andrew Ackland-Snow, director David Yates turned to Rowling for permission to change the locale in an effort to make the scene a bit more cinematic:
"We wanted to change a bit where Snape dies. In the book, he dies in the Shrieking Shack, and we wanted to get him out from, not a conventional interior, but from that kind of box, to do it in a more dramatic atmosphere. We asked J.K. if she agreed for that to happen in there, because we hadn't really seen it before. We made a crystal house, and you can see what happens in the boat house from there ... but also the school is in flames ... and she loved it. Besides, it's a very romantic place to die. Snape dies in a extremely good way, I gotta say."