The best DVDs illuminate how a film came to be the way it is, regardless of your criticisms.
Given that reactions to Twilight careen wildly from cynicism to slavish devotion, it is noteworthy that the Twilight DVD casts enough light to turn any vampire into a marbled mass of shimmering diamonds.
It other words, it perfectly reflects the movie.
The two-disc Twilight: Special Edition -- set for release Saturday -- even shows why Edward is Edward -- because author Stephanie Meyer and director Catherine Hardwicke see him in that idealized way.
"I'm just fascinated with him as a character because he doesn't see how special he is," Meyer says on the DVD.
"He thinks of himself as this horrible monster and he is beautiful and he is interesting and intelligent and brilliant."
In Hardwicke's case, she says she thinks of Twilight as a Romeo and Juliet story. "I just thought it was so romantic and kind of crazy sexy."
One of the more revealing DVD segments is a public session at Comic-Com last summer in San Diego, where Twilight was accorded rock-star status.
One teen asked: "How come you guys picked a lot of cute guys to play the vampires?"
A smiling Meyer answered: "Because that's how I wrote them!"
Another teen said to heartthrob Robert Pattinson, who plays Edward: "I just want to ask how it is to portray a superhot vampire in a movie."
Pattinson, predictably, gets all awkward: "I don't know if I am playing that!"
But everyone else knows. The crowd went wild.