There is a specific shot in Star Wars: A New Hope that haunts fans of a certain age.

If you own the movies already, you owe it to yourself to see them the way they won Oscars for Visual Effects. Before the "Maclunkey." Before the "Nooo." Before the dancing fat alien in Jabba’s Palace.

It’s not the binary sunset. It’s not the trench run. It’s the moment Han Solo shoots Greedo. For 20 years, that scene was perfect: a rogue gunslinger shooting first. Then, in 1997, George Lucas went back into the archives. Greedo shot first. Han dodged. The moment lost its edge.